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Enkele faktore wat die vruggroei van sitrus beïnvloed
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: S.F. du Plessis --- , Republiek van Suid-Afrika H.M. du Plessis --- , Republiek van Suid-Afrika'n Ondersoek het aangetoon dat 'n hoogsbetekenisvolle (r = 0,96) verwantskap bestaan tussen waterverbruik van 'n volwasse sitrusboom en vruggroeitempo. Waterverbruik bereik 'n maksimum van 80–90 l/dag gedurende die periode Desember tot einde Maart, dit is dieselfde tyd wanneer vruggrootte... -
Estimating Class A pan evaporation at locations with sparse climatic data
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: B. Clemence --- , Republic of South AfricaClass A pan evaporation was found to correlate closely with daylength-adjusted maximum daily air temperature (ATM), on a bimonthly basis. ATM and altitude were used as variables in a regression analysis to develop a series of evaporation-estimation equations for various... -
Factors affecting fruit quality and shelf life of Bon Chretien pears
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: H.J. van Zyl --- , Republic of South Africa J.M. Olivier --- Deciduous Fruit Board, Republic of South AfricaBon Chretien pears for canning and the fresh market are grown under various climatic conditions in South Africa. The major orchard factor affecting the shelf life of the fruit after storage seems to be the number of days between full-... -
Nitrogen mineralization, nitrification and nitrogen balance in laboratory incubation of soil from natural grassland in the central Orange Free State
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: G.H. Wiltshire --- Department of Soil Science, Republic of South AfricaAir-dried soil from three layers under grassveld was moistened by the addition of 12 levels of water and incubated for up to two years at five temperatures in screw-capped preserving jars with an air-filled head- space equivalent to seven times... -
The mineralogy of five weathering profiles developed from Archaean granite in the eastern Transvaal, Republic of South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: C. Bühmann --- , Republic of South Africa W. F.A. Kirsten --- , Republic of South AfricaMineralogical, chemical and electron microscopy studies were carried out on five weathering profiles developed on Archaean granites from the Nelspruit area to study changes in the distribution of primary minerals and their weathering products with profile development. The pedons differ... -
An attempt at estimating solar radiation at South African sites which measure air temperature only
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: B. S.E. Clemence --- , Republic of South AfricaDaily potential surface radiation values were calculated for selected South African weather stations. These were used, together with various air temperature parameters, to derive regression equations to estimate actual surface solar radiation at sites lacking the required instrumentation. A single... -
The base status criterion in South African soil classification
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M.V. Fey --- Department of Agronomy, Republic of South Africa M.J. Donkin --- , Republic of South AfricaEvidence is considered which indicates that the sum of extractable bases and acidity, termed the effective cation exchange capacity (ECEC), is a more reliable criterion than the S-value (sum of exchangeable bases only) for differentiating soils in terms of the... -
Open-top chambers to study air pollution impacts in South Africa. Part I: microclimate in open-top chambers
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: E Heyneke --- School of Environmental Science and Development, South Africa PR Smit --- School of Environmental Science and Development, South Africa L van Rensburg --- School of Environmental Science and Development, South Africa GHJ Krüger --- School of Environmental Science and Development, South AfricaSouth Africa's large industrial growth has created an obvious need to extend, improve and evaluate air pollution impacts on plants in order to assess present-day and future impacts of air pollutants on crop yields. In order to provide guidelines for... -
Predicting the extent of succulent thicket under current and future climate scenarios
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: MP Robertson AR PalmerUsing data from the distribution records of the facultative CAM succulent shrub Portulacaria afra, and high resolution climate response surfaces, we developed a spatially explicit model of the potential distribution of the species in the Thicket Biome of the eastern... -
Response to elevated CO2 from a natural spring in a C4-dominated grassland depends on seasonal phenology
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: SJE Wand GF Midgley WD StockA South African C4-dominated grassland was exposed to twice-ambient atmospheric CO2 concentration using gas emitted by a natural CO2 spring and distributed over a 7m x 7m plot. A similar control plot was established 20m away at near-ambient CO2 concentrations... -
The impact of grazing on forage quality of the herbaceous vegetation in the Mamora cork oak forest, Morocco
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: M. Mejjati Alami --- Department of Plant Ecology and Range Science, Morocco T.E. Bedell --- Department of Rangeland Resources, United States S.H. Sharrow --- Department of Rangeland Resources, United States O. Berkat --- Department of Plant Ecology and Range Science, MoroccoThis research was conducted in the Mamora cork oak forest of Morocco to describe the impacts of sheep grazing (no use, 35% use, 70% use) in March, April, May and June of 1987 and 1988 on seasonal changes in forage... -
Climate change perceptions, drought responses and views on carbon farming amongst commercial livestock and game farmers in the semiarid Great Fish River Valley, Eastern Cape province, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: CL Clarke --- Department of Environmental Science, South Africa SE Shackleton --- Department of Environmental Science, South Africa M Powell --- Department of Environmental Science, South AfricaThere is increasing evidence that climate change will be one of the primary challenges facing future development and agriculture. Farmers, whether crop or livestock farmers, will be faced with tradeoffs and constraints as climate change exposes them to greater risk... -
Perceptions of climate change and barriers to adaptation amongst commonage and commercial livestock farmers in the semi-arid Eastern Cape Karoo
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Claudette Muller --- Department of Environmental Science, South Africa Sheona E Shackleton --- Department of Environmental Science, South AfricaClimate change is expected to adversely affect agriculture in South Africa. A rise in variable and unfavourable conditions is likely to surpass the limits of current coping mechanisms of farmers, compelling them to implement more resilient adaptive measures to decrease... -
Bushclump-grass interactions: influence of bushclumps on their local environment in a south-east African savanna
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: L.C. Jarvel T.G. O'ConnorThe interaction between multi-species bushclumps and the herbaceous layer was investigated in a mesic Eastern Cape bushclump savanna. Bushclumps had a moderating effect on their microclimate when compared with the open grassland: lower maximum and higher minimum temperatures. higher humidity... -
Palmer Drought Indices and Their Application to Plantation Establishment Strategies
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: J.B. Zwolinski --- ,Palmer drought models are introduced as an objective measure of monthly moisture conditions and their application for forestry research is discussed. A case-study showed that Palmer Hydrological Drought Index was preferred to Palmer Drought Severity Index for deciding on establishment... -
The Psychometric Properties of the Adapted and Revised Organisational Climate Description Questionnaire (AAROCDQ)
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Werner de Klerk --- North-West University, South Africa Q. Michael Temane --- North-West University, South Africa Alida W. Nienaber --- North-West University, South AfricaThis study validated the Adapted and Revised Organisational Climate Description Questionnaire (AAROCDQ) for school climate as experienced by teachers. Participants were 394 school teachers (72 male and 322 female) from 40 schools in South Africa. Internal consistency and factor structure... -
Water policy in southern Africa: A brief synopsis of some of the macro driving forces
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: AR TurtonThe water sector reforms that are underway in many parts of southern Africa are a manifestation of a global phenomenon. This is rooted in the human response to the undesirable consequences of development, and seeks to introduce the notion of... -
Diversity patterns of temporary wetland macroinvertebrate assemblages in the south-western Cape, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: MC Mlambo --- Freshwater Research Unit, Department of Zoology, South Africa MS Bird --- Freshwater Research Unit, Department of Zoology, South Africa CC Reed --- Freshwater Research Unit, Department of Zoology, South Africa JA Day --- Freshwater Research Unit, Department of Zoology, South AfricaAlthough macroinvertebrates are potentially useful for assessing the condition of temporary wetlands, little is yet known about them. Macroinvertebrate assemblages were assessed in 138 temporary wetlands in the south-western Cape, recording 126 taxa. However, predicted richness estimates were all higher... -
Relationship between water temperature predictability and aquatic macroinvertebrate assemblages in two South African streams
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: BR Eady --- Discipline of Geography, School of Agricultural, Earth and Environmental Sciences, South Africa NA Rivers-Moore --- Centre for Water Resources Research, South Africa TR Hill --- Discipline of Geography, School of Agricultural, Earth and Environmental Sciences, South AfricaVariable seasonal stream temperatures are a critical factor in maintaining aquatic invertebrate community patterns. We investigated whether the degree of predictability in a stream's water temperature profile provides insights into the structure and functional predictability of macroinvertebrate communities. Quarterly macroinvertebrate... -
Variations and changes in habitat, productivity, composition of aquatic biota and fisheries of the Kyoga lake system: lessons for management
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: R Ogutu-Ohwayo --- National Fisheries Resources Research Institute, Uganda K Odongkara --- National Fisheries Resources Research Institute, Uganda W Okello --- National Fisheries Resources Research Institute, Uganda D Mbabazi --- National Fisheries Resources Research Institute, Uganda SB Wandera --- National Fisheries Resources Research Institute, Uganda LM Ndawula --- National Fisheries Resources Research Institute, Uganda V Natugonza --- National Fisheries Resources Research Institute, UgandaThe Kyoga lake system, which is c. 4 m deep, originally had a diverse fish fauna, extensive macrophytes and wetlands. Most (82%) of its water comes from Lake Victoria, is controlled through three dams and has a short residence time... -
Ostrich recruitment dynamics in relation to rainfall in the Mara–Serengeti ecosystem
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: JosephO Ogutu --- Institute of Crop Science, Germany Hans-Peter Piepho --- Institute of Crop Science, Germany HollyT Dublin --- Species Survival Commission, International Union for Conservation of Nature and Natural Resources, c/o Centre for Biodiversity Conservation, South AfricaAnimal population dynamics can be driven by rainfall variability through its influence on habitat suitability, availability and nutritional sufficiency of forage. To understand how rainfall influences ostriches, we related changes in ostrich recruitment in the Mara–Serengeti ecosystem to rainfall. Over... -
Ground cavity nest temperatures and their relevance to Blue Swallow Hirundo atrocaerulea conservation
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: James Wakelin --- Scientific Services, Ezemvelo KZN Wildlife, South Africa Amy-Leigh Wilson --- School of Life Sciences, South Africa Colleen T Downs --- School of Life Sciences, South AfricaBlue Swallows Hirundo atrocaerulea are Critically Endangered within South Africa. They nest in natural underground holes in mist-belt grasslands. Temperature dataloggers were used to record ground cavity nest (Tn) and ambient temperature (Ta) for one artificial and 11 natural Blue... -
7. Problems in Using Vegetation or Soil Classification in Determining Site Quality
Item type: Journal Article • Journal: South African Forestry Journal • Authors: A. P.G. Schönau --- , South AfricaThis paper discusses the concepts of site and site quality and reviews briefly the determination of the latter. Site quality is viewed primarily as productive capacity of forest land, although other aspects are considered also. It is concluded that nowadays... -
Tropical South-East Atlantic response to ENSO as an ecosystem indicator for the southern Benguela
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: MR JuryThe response of the tropical South-East Atlantic Ocean to the El Niño Southern Oscillation (ENSO) was studied for the period 1950–1999. Interaction between the ocean thermocline 'see-saw' and the overlying zonal wind circulation was examined. The two are closely linked... -
Coastal oceanic climate change and variability from 1982 to 2009 around South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: M Rouault --- Department of Oceanography, Marine Research Institute, South Africa B Pohl --- Centre de Recherches de Climatologie, France P Penven --- , FranceChanges and fluctuations in sea surface temperature (SST) around the South African coast are analysed at a monthly scale from 1982 to 2009. There is a statistically significant negative trend of up to 0.5 °C per decade in the southern... -
Temporal variability of a temperate fish assemblage in Africa's oldest marine protected area
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: NC James --- , South Africa A Götz --- Elwandle Node, South African Environmental Observation Network (SAEON), South Africa WM Potts --- Department of Ichthyology and Fisheries Science, South Africa PD Cowley --- , South AfricaA standardised research-based, shore-angling survey was conducted in the 47-year-old Tsitsikamma National Park Marine Protected Area (MPA) between 1998 and 2005. The aim of this study was to examine variability in community structure, relative abundance (catch per unit effort, CPUE)... -
South African kelp moving eastwards: the discovery of Ecklonia maxima (Osbeck) Papenfuss at De Hoop Nature Reserve on the south coast of South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: JJ Bolton --- Botany Department and Marine Research Institute, South Africa RJ Anderson --- Botany Department and Marine Research Institute, South Africa AJ Smit --- School of Biological and Conservation Sciences, Faculty of Science, South Africa MD Rothman --- Botany Department and Marine Research Institute, South AfricaHistorical and recent evidence is documented to demonstrate that the eastern limit of the major kelp-bed forming seaweed Ecklonia maxima has moved c. 73 km eastward along the south coast of South Africa since 2006, after remaining unchanged for almost... -
Variability in estuarine water temperature gradients and influence on the distribution of zooplankton: a biogeographical perspective
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: TH Wooldridge --- Department of Zoology, South Africa SHP Deyzel --- , South AfricaStructure and variability of water temperature gradients and potential influence on distribution of two tropical zooplankters (the mysid Mesopodopsis africana and the copepod Acartia natalensis) and their temperate congenerics (M. wooldridgei and A. longipatella) was investigated over a 10-year period... -
St Helena Bay (southern Benguela) then and now: muted climate signals, large human impact
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: L Hutchings --- Department of Environmental Affairs, South Africa A Jarre --- Marine Research (MA-RE) Institute, South Africa T Lamont --- Department of Environmental Affairs, South Africa M van den Berg --- Department of Environmental Affairs, South Africa SP Kirkman --- Department of Environmental Affairs, South AfricaThe development of suitable reference states for ecosystem-based management requires documentation of changes in structure and functioning of marine ecosystems, including assessment of the relative importance of bottom-up and top-down processes as drivers of change. We used monitoring data available... -
Human-mediated drivers of change — impacts on coastal ecosystems and marine biota of South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: A Mead --- Centre for Invasion Biology, South Africa C L Griffiths --- Centre for Invasion Biology, South Africa G M Branch --- Department of Biological Sciences, South Africa C D McQuaid --- Department of Zoology and Entomology, South Africa L K Blamey --- Department of Biological Sciences, South Africa J J Bolton --- Department of Biological Sciences, South Africa R J Anderson --- Department of Biological Sciences, South Africa F Dufois --- Marine Research Institute, South Africa M Rouault --- Marine Research Institute, South Africa P W Froneman --- Department of Zoology and Entomology, South Africa A K Whitfield --- South African Institute for Aquatic Biodiversity, South Africa L R Harris --- Department of Zoology, South Africa R Nel --- Department of Zoology, South Africa D Pillay --- Department of Biological Sciences, South Africa J B Adams --- Department of Botany, South AfricaCoastal ecosystems are highly vulnerable to human-mediated drivers of global change because they are located at the land–ocean interface and often host centres of urbanisation and development. The South African coastline comprises several distinct coastal ecoregions that support a wide... -
Reviewing evidence of marine ecosystem change off South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: C L Moloney --- Department of Biological Sciences, South Africa S T Fennessy --- Oceanographic Research Institute, South Africa M J Gibbons --- Department of Biodiversity and Conservation Biology, South Africa A Roychoudhury --- Department of Earth Sciences, South Africa F A Shillington --- Marine Research Institute, South Africa B P von der Heyden --- Department of Earth Sciences, South Africa K Watermeyer --- Department of Biological Sciences, South AfricaRecent changes have been observed in South African marine ecosystems. The main pressures on these ecosystems are fishing, climate change, pollution, ocean acidification and mining. The best long-term datasets are for trends in fishing pressures but there are many gaps,... -
Agriculture and Climate Change in Cameroon: An Assessment of Impacts and Adaptation Options
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Yong D. Ngondjeb --- , CameroonThis study aims to assess the economic impact of climate change on crop farming activities in the Sudano-Sahelian Area of Cameroon. The study uses the Ricardian model and is based on farm data generated from a survey carried out in... -
A Rapid Solar Transition is not only Possible, it is Imperative!
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: David Schwartzman --- Department of Biology, USA Peter Schwartzman --- Department of Environmental Studies, USACatastrophic climate change (C3) is inevitable if carbon emissions to the atmosphere are not rapidly reduced and the now unsafe atmospheric level (400 ppm) CO2 (and rising) is not brought down by sequestration technologies to below 350 ppm. C3 prevention is possible... -
A stratification of the South African forestry landscape based on climatic parameters
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: JH Louw --- School of Natural Resource Management, South Africa I Germishuizen --- , South Africa CW Smith --- Paperbark Forestry Consulting, South AfricaThe benefits of high-resolution forest site classification systems have been widely acknowledged in South Africa as a prerequisite for decision-making in forestry management. Although substantial research and development work have been done on categorising and mapping the soil and geological... -
Lasiodiplodia species associated with dying Euphorbia ingens in South Africa
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: JA van der Linde --- Department of Microbiology and Plant Pathology, DST/NRF Centre of Excellence in Tree Health Biotechnology, Forestry and Agricultural Biotechnology Institute, South Africa DL Six --- College of Forestry and Conservation, Department of Ecosystem and Conservation Sciences, USA MJ Wingfield --- Department of Microbiology and Plant Pathology, DST/NRF Centre of Excellence in Tree Health Biotechnology, Forestry and Agricultural Biotechnology Institute, South Africa J Roux --- Department of Microbiology and Plant Pathology, DST/NRF Centre of Excellence in Tree Health Biotechnology, Forestry and Agricultural Biotechnology Institute, South AfricaVarious species of Euphorbia occur in South Africa, including herbaceous, succulent and woody types. The largest of the succulent Euphorbia spp. in South Africa is Euphorbia ingens. These trees have been dying at an alarming rate in the Limpopo province... -
The strategic importance of applied tree conservation programs to the forest industry in South Africa
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: WS Dvorak --- College of Natural Resources, Department of Forestry and Environmental Resources, USABecause of anticipated adverse climatic change and resulting increases in disease and insect attacks in forest plantations in the future, forest industries must maintain broad genetic bases for adaptability and pest resistance. Since the early 1980s, the South African forest... -
Early growth results of three Eucalyptus grandis × Eucalyptus nitens hybrid clonal trials and their response to snow events
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Iain M Thompson --- Forest Technology Services, South AfricaEucalyptus grandis × Eucalyptus nitens (G×N) hybrid clones are selected to combine complimentary characteristics of E. nitens and E. grandis. G×N hybrid clones also have the potential to increase growth rates and provide adaptability to a changing climate. A series... -
Mass on arrival of rockhopper penguins at Marion Island correlated with breeding success
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: RJM Crawford AB Makhado L Upfold BM DyerFor rockhopper penguins Eudyptes chrysocome at Marion Island, there were significant decreases over time in the numbers breeding and breeding success at three monitored colonies from 1985/1986 to 2006/2007, and in mass on arrival for breeding of both males and... -
Recent distributional changes of seabirds in South Africa: is climate having an impact?
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: RJM Crawford AJ Tree PA Whittington J Visagie L Upfold KJ Roxburg AP Martin BM DyerThere have been recent changes in the distributions of several seabirds in South Africa. In the mid-1990s, breeding of Leach's storm petrel Oceanodroma leucorhoa was recorded in the Western Cape, the first record for the Southern Hemisphere. There was a... -
Climate change and desertification in South Africa—science and response
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: ERM Archer --- Climate Change, South Africa MA Tadross --- Climate Systems Analysis Group, South AfricaDespite significant attention paid to desertification and climate change in the last few decades, interactions between the phenomena, as well as implications thereof, have received less of a focus. Such a trend is particularly marked in the science– policy arena,... -
Water location, piospheres and a review of evolution in African ruminants
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: JF Derry AJ DougillThe main radiation of large mammalian herbivores in Africa took place in the Pliocene–Pleistocene, when a long-term trend towards aridification promoted grasslands and the diversification of ruminant grazers. Traditional models of this evolution identify habitat fragmentation in response to climate... -
Potential impacts of climate change on the climatically suitable growth areas of Pinus and Eucalyptus: results from a sensitivity study in South Africa
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: ML Warburton RE SchulzeGlobal average surface temperature has increased by approximately 0.74 °C over the most recent 100-year period. At a regional level in South Africa, detectable changes in both the rainfall and temperature patterns have occurred in the past 50 years. Climate... -
Energy, chemicals and carbon: future options for the Eucalyptus value chain
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: S ChristieThis paper examines the current Eucalyptus value chain and the possible drivers that may impact upon it. The potential consequences of climate change on the growth and yield of Eucalyptus are discussed and the impact of the security of oil... -
Responses of the Serengeti avifauna to long-term change in the environment
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Anthony RE Sinclair --- Beaty Biodiversity Research Centre, Canada Ally Nkwabi --- Serengeti Biodiversity Program, Tanzania Simon AR Mduma --- Beaty Biodiversity Research Centre, Canada Flora Magige --- Department of Zoology and Wildlife Conservation, TanzaniaIn this paper we examine how climate change interacts with other disturbances to alter the functioning of a tropical ecosystem, the Serengeti in Tanzania. Tropical Africa has increasing temperatures and changes in rainfall. Long-term data have shown how the avifauna... -
Water temperature affects life-cycle duration of tadpoles of Natal cascade frog
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: NA Rivers-Moore --- Centre for Water Resources Research, South Africa RJ Karssing --- Ezemvelo KZN Wildlife, South AfricaDirect and indirect effects of climate change on amphibians include range shifts and changes in community structure. The Natal cascade frog Hadromophryne natalensis has an altitudinal range of some 2 400 m in KwaZulu-Natal, and presents an opportunity to assess... -
Vegetation change in northern KwaZulu-Natal since the Anglo-Zulu War of 1879: local or global drivers?
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Jennifer Russell --- School of Life Sciences, South Africa David Ward --- School of Life Sciences, South AfricaThe quality of the landscape is declining in many grassland and savanna areas of Africa as a consequence of woody plant encroachment. We investigated the changes in vegetation at selected sites on the battlefields of the Anglo-Zulu War of 1879... -
A century of woody plant encroachment in the dry Kimberley savanna of South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: David Ward --- School of Life Sciences, South Africa M Timm Hoffman --- Plant Conservation Unit, Botany Department, South Africa Sarah J Collocott --- School of Life Sciences, South AfricaWoody plant encroachment is frequent in dry savannas. Grazing is often considered to be a major cause of encroachment in dry savannas because grasses are removed by livestock, leaving bare areas for trees to colonise in wetter years. Earlier experiments... -
Chronic diseases, climate change and complexity: the hidden connections
Item type: Journal Article • Journal: South African Family Practice • Authors: R Mash --- Division of Family Medicine and Primary Care, South AfricaIn this paper the argument is presented that we can expect an increase in chronic diseases within developing countries such as South Africa and that this is largely due to changes in lifestyle, such as diet and exercise. While these... -
Geology and groundwater regions to quantify primary salinity, sodicity and alkalinity in South African soils
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Johannes P Nell --- Agricultural Research Council–Institute for Soil, Climate and Water, South Africa Cornelius W van Huyssteen --- Department of Soil, Crop and Climate Science, South AfricaAlthough anthropogenic salinisation and sodification has been researched extensively, little is known about the primary salinity in South Africa. This paper therefore aimed to determine the primary salinity, sodicity and alkalinity conditions for South African soils, based on geological units... -
Soil classification groups to quantify primary salinity, sodicity and alkalinity in South African soils
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Johannes P Nell --- Agricultural Research Council–Institute for Soil, Climate and Water, South Africa Cornelius W van Huyssteen --- Department of Soil, Crop and Climate Science, South AfricaThis study aimed to quantify the primary salinity, sodicity and alkalinity of South African soils based on soil classification groups and rainfall classes, by using available analysed data. The 73 soil forms used by the Soil Classification Working Group were... -
Microclimate conditions in ventilated wet-walled greenhouses in a subtropical climate: spatial variability
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Michael J Savage --- Agrometeorology Discipline, Soil-Plant-Atmosphere Continuum Research Unit, School of Agricultural, Earth and Environmental Sciences, South AfricaSpatial variations of microclimatic conditions in enclosed north–south (N–S) oriented single-arched greenhouse polycarbonate structures, with a wet-wall providing evaporative cooling at the S end, were investigated and displayed online in near real-time. Temperature-controlled fans at the N end extracted air... -
Adopting latecomers' strategies for the development of renewable energy technology in Africa
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Maruf Sanni --- National Centre for Technology Management, Federal Ministry of Science and Technology, Obafemi Awolowo University, Nigeria Oluwatosin G Oladipo --- National Centre for Technology Management, Federal Ministry of Science and Technology, Obafemi Awolowo University, Nigeria Ibikunle O Ogundari --- National Centre for Technology Management, Federal Ministry of Science and Technology, Obafemi Awolowo University, Nigeria O Titilayo Aladesanmi --- National Centre for Technology Management, Federal Ministry of Science and Technology, Obafemi Awolowo University, NigeriaThe overall objective of this paper is to develop strategies on how renewable energy technology could be used to abate climate change impacts in Africa. While assessing the potential impacts of climate change in Africa, the paper asserts that renewable... -
Optimising drought adaptation by small-scale farmers in southern Africa through integration of indigenous and technologically-driven practices
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Rudzani A. Makhado --- Unit Manager, Research & Evaluation Section, South Africa Amani T. Saidi --- Stakeholder Manager, South African Environmental Observation Network, South Africa Phumudzo P. Tshikhudo --- Scientist, Plant Health Directorate, Department of Agriculture, South AfricaThis paper reviews and synthesises research-based literature on drought adaptation practices among small-scale farmers in southern Africa. The paper reviews the existing literature in order to identify ways in which small-scale poor farmers in southern Africa adapt to the effects... -
An innovative drought early warning system for sub-Saharan Africa: integrating modern and indigenous approaches
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Muthoni Masinde --- Department of Information Technology, South AfricaDroughts remain the number one disaster in Africa; drought is responsible for over 88% of all the types of disasters that people are affected by. An effective drought early warning system can support appropriate mitigation and preparedness strategies and hence... -
Can behaviour buffer the impacts of climate change on an arid-zone bird?
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Susan J Cunningham --- Percy FitzPatrick Institute of African Ornithology, DST–NRF Centre of Excellence, South Africa Rowan O Martin --- Percy FitzPatrick Institute of African Ornithology, DST–NRF Centre of Excellence, South Africa Philip AR Hockey --- Percy FitzPatrick Institute of African Ornithology, DST–NRF Centre of Excellence, South AfricaBehavioural thermoregulation, particularly the use of cool microclimates, is one method by which organisms could avoid the worst effects of climate warming. However, retreat into cool microsites, e.g. shady vegetation or burrows, may carry important lost-opportunity costs. These could include... -
Elevated temperatures drive fine-scale patterns of habitat use in a savanna bird community
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Rowan O Martin --- Percy FitzPatrick Institute of African Ornithology, DST–NRF Centre of Excellence, South Africa Susan J Cunningham --- Percy FitzPatrick Institute of African Ornithology, DST–NRF Centre of Excellence, South Africa Philip AR Hockey --- ,Many animals use thermally buffered microhabitats, e.g. patches of shade within trees, to avoid temperature extremes. These ‘thermal refugia’ may mediate the impact of climate change on animals. Predicting how species and communities will respond to rising temperatures therefore requires... -
Crop model usefulness in drylands of southern Africa: an application of DSSAT
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Nkulumo Zinyengere --- Climate System Analysis Group, Department of Environmental and Geographical Science, South Africa Olivier Crespo --- Climate System Analysis Group, Department of Environmental and Geographical Science, South Africa Sepo Hachigonta --- Food Agriculture and Natural Resources Policy Analysis Network, South Africa Mark Tadross --- United Nations Development Programme – Global Environment Facility, South AfricaCrop models are useful tools for simulating impacts of climate and agricultural practices on crops. Models have to demonstrate the ability to simulate actual crop growth response in particular environments before application. Data limitations in southern Africa frequently hinder adequate... -
Mangrove expansion and population structure at a planted site, East London, South Africa
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Sabine CL Hoppe-Speer --- Department of Botany, South Africa Janine B Adams --- Department of Botany, South Africa Anusha Rajkaran --- Department of Botany, South AfricaAvicennia marina (Forrsk.) Vierh. was planted in 1969 at Nahoon Estuary, East London, followed a few years later by the planting of Bruguiera gymnorrhiza (L.) Lam. and Rhizophora mucronata (L.) among the larger A. marina trees. This study tested the... -
Assessment of the effects of climate change on the performance of pavement subgrade
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: M.B. Mndawe --- Department of Civil Engineering, South Africa J.M. Ndambuki --- Department of Civil Engineering, South Africa W.K. Kupolati --- Department of Civil Engineering, South Africa A.A. Badejo --- Department of Civil Engineering, South Africa R. Dunbar --- Royal Haskoning DHV, South AfricaThis research investigated the effects of future climate change on pavement life in South Africa by simulating prolonged moisture presence in the pavement subgrade. The study was conducted on roads P435 and P443 within uMkhanyakude District Municipality. Climatic data were... -
Ethics culture and ethics climate in relation to employee engagement in a developing country setting
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Jeremy Mitonga-Monga --- Department of Industrial and Organisational Psychology, South Africa Frans Cilliers --- Department of Industrial and Organisational Psychology, South AfricaThe study investigated the relationship between employees’ perceived workplace ethics culture and climate variables and their level of engagement. A non-probability sample (N = 839; females = 32%) was permanently employed in a railway organisation in the Democratic Republic of Congo (DRC). The research... -
Silvopastoral system based on Ficus thonningii: an adaptation to climate change in northern Ethiopia
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Mulubrhan Balehegn --- Animal Rangeland and Wildlife Sciences, Ethiopia Lars O Eik --- Department of International Environment and Development Studies, Ås, Norway Yayneshet Tesfay --- International Livestock Research Institute (ILRI), EthiopiaThis study in northern Ethiopia investigated local people's perception of climate change and the role of indigenous silvopastoralism in adaptation to that change. Two hundred and forty respondents participated in a questionnaire survey and group discussions. Local communities perceive climate... -
Temporal changes in cranial size in South African vlei rats (Otomys): evidence for the ‘third universal response to warming’
Item type: Journal Article • Journal: African Zoology • Authors: Aluwani Nengovhela --- Department of Ecology and Resource Management, School of Environmental Sciences, South Africa Roderick M Baxter --- Department of Ecology and Resource Management, School of Environmental Sciences, South Africa Peter J Taylor --- South African Research Chair on Biodiversity Value and Change in the Vhembe Biosphere Reserve, School of Mathematics and Natural Sciences, South AfricaUsing museum collections and recently collected specimens we studied geographical and temporal (from 1906 to 2013) changes in skull size of two sibling species of rodents, Otomys auratus and O. angoniensis, in northern South Africa occupying distinct temperate grassland (O... -
Late Pleistocene potential distribution of the North African sengi or elephant-shrew Elephantulus rozeti (Mammalia: Macroscelidea)
Item type: Journal Article • Journal: African Zoology • Authors: Árpád S. Nyári --- Natural History Museum and Biodiversity Research Center, U.S.A. Townsend A. Peterson&yg --- Natural History Museum and Biodiversity Research Center, U.S.A. Galen B. Rathbun --- Department of Ornithology and Mammalogy, California Academy of Sciences, U.S.A.The Sahara Desert was recently proposed as the agent of vicariant speciation in the North African elephant-shrew (order Macroscelidea, Elephantulus rozeti). Based on evidence from molecular dating, however, this speciation event was estimated as having occurred in the Miocene, an... -
Carbon stocks in a 50‑year‑old Eucalyptus camaldulensis stand in Sicily, Italy
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Riccardo Scalenghe --- Dipartimento Scienze Agrarie e Forestali, Italy Luisella Celi --- Dipartimento di Scienze Agrarie, Forestali e Alimentari, Italy Giovanna Costa --- Dipartimento Scienze Agrarie e Forestali, Italy V Armando Laudicina --- Dipartimento Scienze Agrarie e Forestali, Italy Stefania Santoni --- Dipartimento di Scienze Agrarie, Forestali e Alimentari, Italy Dario Vespertino --- Dipartimento Scienze Agrarie e Forestali, Italy Tommaso La Mantia --- Dipartimento Scienze Agrarie e Forestali, ItalyEucalyptus stands in semi‑arid areas may contribute to enhance carbon (C) stocks in both biomass and soil. However, the limited information available is mainly focused on short‑rotation plantations. In this study, the above‑ and below‑ground C pools in five 50‑year‑old... -
A Profile of the East African Community
Item type: Journal Article • Journal: Africa Journal of Management • Authors: Frederick Onyango Ogola --- Strathmore University Business School, Kenya George N. Njenga --- Strathmore University Business School, Kenya Peter C. Mhando --- The Pennsylvania State University, USA Moses N. Kiggundu --- Carleton University Sprott School of Business, CanadaRegional integration in East Africa dates back more than a hundred years. This article provides a general synopsis of the East African Community (EAC) and traces the evolution of regional integration in Eastern Africa from colonial times to the present... -
Impact of rainfall variability on groundwater levels in Ruiru municipality, Kenya
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: R.M. Nyakundi --- Department of Civil, Construction and Environmental Engineering, Kenya M. Makokha --- Department of Water Engineering and Technology, Kenya J.K. Mwangi --- Department of Civil, Construction and Environmental Engineering, Kenya C. Obiero --- Department of Land Resource Planning and Management, KenyaGroundwater accounts for the largest fresh water resources in the world. However, there has been limited exploitation of this vital resource in many areas. Where groundwater resources have been utilised, they have been over-exploited, polluted, wasted and mismanaged. In Ruiru... -
Reflooding the Faguibine floodplain system, northern Mali: potential benefits and challenges
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: O Hamerlynck --- Kenya Wetlands Biodiversity Research Team, Kenya SA Moulaye Zeine --- Global Monitoring, Mauritania JY Mutua --- Kenya Wetlands Biodiversity Research Team, Kenya LV Mukhwana --- Kenya Wetlands Biodiversity Research Team, Kenya M Yéna --- Direction Nationale de l’Hydraulique du Mali, MaliThe Faguibine system, northern Mali, consists of a series of interconnected floodplains of which the flooded surface area declined from about 1 000 km² in the late 19th century to only some 90 km² in 2010. Flood extent depends on... -
Mangrove reforestation: greening or grabbing coastal zones and deltas? Case studies in Senegal
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: MC Cormier-Salem --- IRD, UMR PALOC, Senegal J Panfili --- IRD, UMR MARBEC, FranceBesides their important contribution to global biodiversity, mangroves provide many services. Nevertheless, due to an increase of human activities and to climate change, in less than 20 years these ecosystems have lost one fifth of their global surface area. In... -
Influence of local environmental conditions and bleaching histories on the diversity and distribution of Symbiodinium in reef-building corals in Tanzania
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: LJ Chauka --- Institute of Marine Sciences, Tanzania G Steinert --- Institute for Chemistry and Biology of the Marine Environment (ICBM), Germany MSP Mtolera --- Institute of Marine Sciences, TanzaniaPollution, turbidity and coral bleaching history, as well as coral diversity, vary along the Tanzanian coastline. Prior to this study, it was not known whether exposure to such environmental variation might have influenced the diversity and distribution of Symbiodinium along... -
The role of snail aestivation in transmission of schistosomiasis in changing climatic conditions
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: O Rubaba --- College of Health Sciences, South Africa MJ Chimbari --- College of Health Sciences, South Africa S Mukaratirwa --- School of Life Sciences, South AfricaSchistosomiasis vector snails are subjected to extreme seasonal changes, particularly in ephemeral rivers and lentic waterbodies. In the tropics, aestivation is one of the adaptive strategies for survival and is used by snails in times of extremely high temperatures and... -
Monitoring eucalypt bud temperature using mobile temperature loggers
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Robin AW Gardner --- Institute for Commercial Forestry Research, South Africa Michael J Savage --- Agrometeorology Discipline, School of Agricultural, Earth and Environmental Sciences, South Africa Isa Bertling --- Horticultural Science Discipline, School of Agricultural, Earth and Environmental Sciences, South AfricaWinter chilling is a key environmental trigger of floral induction in temperate Eucalyptus. Over the past two decades, considerable site × eucalypt flowering interaction research has been undertaken over a range of high elevation (>1 100 m asl) forestry sites in... -
Green economy transition and the sustainability of the Nigerian aquaculture industry: Policy perspectives and the way forward
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Zelda A. Elum --- College of Agriculture and Environmental Sciences, South Africa Vuyo Mjimba --- Institute for Corporate Citizenship, South AfricaSustainable development and green economy transition call for innovations that address the simultaneous realisation of economic growth, and improved human and environmental well-being. A holistic and appropriate policy and legislative regime is important to ensure the efficacy of these innovations... -
The relationship between HIV and AIDS and water scarcity in Nyamakate resettlements land, north-central Zimbabwe
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Alexio Mbereko --- University of KwaZulu-Natal, South Africa Dianne Scott --- University of KwaZulu-Natal, South Africa Moses John Chimbari --- University of KwaZulu-Natal, South AfricaHIV and AIDS and water variability have been studied separately, yet, they impact on rural households simultaneously in an interactive manner. The study provide narratives on various realities from a study in the Nyamakate community that illustrates the dialectical relationship... -
Climate change and intellectual property rights in Africa: Environmental necessity-economic opportunity
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Maruf Sanni --- National Centre for Technology Management, Federal Ministry of Science and Technology, Nigeria Caleb M. Adelowo --- National Centre for Technology Management, Federal Ministry of Science and Technology, Nigeria David A. Ogunkanbi --- National Centre for Technology Management, Federal Ministry of Science and Technology, Nigeria Adesina A. Oyewale --- National Centre for Technology Management, Federal Ministry of Science and Technology, Nigeria Abolaji D. Dada --- Department of Entrepreneurship Management Technology, Nigeria Bamidele R. Muritala --- National Centre for Technology Management, Federal Ministry of Science and Technology, NigeriaPromoting the development of clean technologies is critical in achieving a low-carbon economy in Africa. The objective of this paper is to shed more light on the role of IPRs in the efforts to mitigate climate change in Africa. This... -
Farmer perceptions of climate change impacts on Swaziland’s sugar industry
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Bon’sile Faith Nicollete Mhlanga-Ndlovu --- Department of Environmental Science, South Africa Godwell Nhamo --- Institute for Corporate Citizenship, University of South Africa, South AfricaThis study investigates the perceptions of sugarcane farmers on climate change impacts and their potential alternative livelihoods in the Lowveld of Swaziland with the objective of informing research and policy initiatives. The study obtained data mainly from a survey involving... -
An early Pliocene (5.1 Ma) fossil frog community from Langebaanweg, south-western Cape, South Africa
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Thalassa Matthews --- , South Africa Eduard van Dijk --- , South Africa Dave L. Roberts --- , South Africa Roger M.H. Smith --- , South AfricaThe 5.1 million year old fossil site of Langebaanweg (LBW) has provided a wealth of information on the evolution of west coast ecosystems along the southern west coast of South Africa and numerous taxa, including small and large mammals, and... -
Nitrogen leakages and vegetable dry matter yield in a subtropical wetland soil amended with cattle manure and mineral nitrogen fertiliser
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Johnson Masaka --- Department of Land and Water Resources Management, Faculty of Natural Resources Management and Agriculture, Zimbabwe Eliton Chivandi --- School of Physiology, Faculty of Health Sciences, South AfricaThe response of nitrous oxide emission and nitrate leaching to increased nitrogen (N) fertiliser and cattle manure applications to wetland vegetable cropping in subtropical Africa have significant impacts on the atmospheric and terrestrial environments. Two field experiments were carried out... -
A review of carbon dynamics and assessment methods in the miombo woodlands
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Ferdinand Handavu --- Forest Science Postgraduate Programme, Department of Plant and Soil Sciences, South Africa Paxie W Chirwa --- Forest Science Postgraduate Programme, Department of Plant and Soil Sciences, South Africa Stephen Syampungani --- Department of Environmental and Plant Sciences, Zambia Larwanou Mahamane --- African Forest Forum, c/o World Agroforestry Centre (ICRAF), KenyaProvision of accurate carbon (C) measurements and analysis are critical components in quantification of C stocks. The objectives of this review were to (1) compile and synthesise current knowledge of available methods for C stock estimation, (2) examine socio-economic drivers... -
Forests, people and environment: some African perspectives
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Paxie W Chirwa --- Forest Science Postgraduate Programme, Department of Plant and Soil Sciences, South Africa Larwanou Mahamane --- African Forest Forum, c/o World Agroforestry Centre (ICRAF), Kenya Godwin Kowero --- African Forest Forum, c/o World Agroforestry Centre (ICRAF), KenyaForests in Africa support the livelihoods of millions of people through provision of timber and non-timber forest products, food and nutrition, energy and payment of environmental services. However, mismanagement of forests has resulted in deforestation and forest degradation, thereby contributing... -
Organic carbon associated with tillage-induced aggregates of some quartz-dominated loamy soils in a semi-arid region of South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Isaiah IC Wakindiki --- School of Agriculture, South Africa Sarah K Njeru --- Department of Agronomy, South AfricaTillage breaks down soil aggregates exposing the associated organic matter to increased degradation. The extent of degradation depends on the soil properties, mainly texture and mineralogy. The objective of this study was to determine the amount of soil organic carbon... -
Results from four Pinus patula water planting trials in the summer rainfall region of South Africa
Item type: Journal Article • Journal: Southern Hemisphere Forestry Journal • Authors: CA Rolando KM LittlePlanting with water is used by some forestry companies in South Africa to reduce post-planting water stress. Four trials were implemented to test the response in survival of Pinus patula to water applied at planting. Two trials each were situated... -
Investigating the environmental adaptability of promising subtropical and cold-tolerant eucalypt species in the warm temperate climate zone of KwaZulu-Natal, South Africa
Item type: Journal Article • Journal: Southern Hemisphere Forestry Journal • Authors: RAW GardnerDuring 2001, a series of four site-species interaction trials was established by the ICFR (Institute for Commercial Forestry Research) in the warm temperate climate zone of KwaZulu-Natal, South Africa (mean annual temperature (MAT) range 16–19°C), to investigate the relative growth... -
Improvement of spatial modelling of crop suitability using a new digital soil map of Tanzania
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Kristin Piikki --- International Center for Tropical Agriculture (CIAT), Kenya Leigh Winowiecki --- World Agroforestry Centre (ICRAF), Kenya Tor-Gunnar Vågen --- World Agroforestry Centre (ICRAF), Kenya Julian Ramirez-Villegas --- International Center for Tropical Agriculture (CIAT), Colombia Mats Söderström --- International Center for Tropical Agriculture (CIAT), KenyaClimate change is projected to have widespread impacts on the climate suitability and geographical distribution of agricultural crops. Simulations were conducted on the suitability of common beans (Phaseolus vulgaris L.) in Tanzania under progressive climate change, taking into account a... -
Eucalypt plantation management in regions with water stress
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: José LM Gonçalves --- Department of Forest Science, Brazil Clayton A Alvares --- Institute of Forest Research and Study, Brazil José HT Rocha --- Department of Forest Science, Brazil Carolina B Brandani --- Department of Forest Science, Brazil Rodrigo Hakamada --- Department of Forest Science, BrazilMost eucalypt plantations are managed in short rotations (6–8 years) and are established in regions with water and nutritional stresses of varying degrees. The mean annual increment in these regions ranges from 20 to 45 m3 ha−1 y−1 depending on... -
Measuring dimensions of social climate among South African higher education students
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Chris Myburgh --- Department of Educational Psychology, South Africa Marie Poggenpoel --- Department of Nursing Science, South Africa Marie Hastings-Tolsma --- Department of Nursing Science, South AfricaWe investigated the structure of social climate among university students to characterise the relative importance of personal and interpersonal factors. Participants were 266 students from a school of education of a large South African university (females = 66.5%; black =... -
The impact of river flooding and high flow on the demersal fish assemblages of the freshwater-dominated Great Fish Estuary, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: P Nodo --- South African Institute for Aquatic Biodiversity (SAIAB), South Africa NC James --- South African Institute for Aquatic Biodiversity (SAIAB), South Africa A-R Childs --- Department of Ichthyology and Fisheries Science, South Africa MDV Nakin --- Department of Biological and Environmental Sciences, South AfricaFreshwater inflow has a strong impact on the biological, chemical and physical characteristics of estuaries, which in turn affect the distribution and abundance of estuarine organisms. Increased climatic variability associated with climate change is predicated to modify precipitation patterns, which... -
Varied diet and opportunistic foraging in the Ethiopian Bush-crow Zavattariornis stresemanni, an Endangered generalist
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Samuel EI Jones --- School of Biological Sciences, UK Andrew J Bladon --- Department of Zoology, UK Nigel J Collar --- BirdLife International, UK Galgalo Dadacha --- Borana National Park Headquarters, Ethiopia Jarso Denge --- Borana National Park Headquarters, Ethiopia Paul F Donald --- Centre for Conservation Science, UKThe Ethiopian Bush-crow Zavattariornis stresemanni is an endangered, co-operatively breeding southern Ethiopian endemic with a remarkably restricted range (c. 6 000 km2). The species’ range was recently found to be almost perfectly predicted by an envelope of cooler, drier and... -
Ethical climate influences on employee commitment through job satisfaction in a transport sector industry
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Jeremy Mitonga-Monga --- Department of Industrial Psychology and People Management, South AfricaThis study examined the extent to which an ethical climate moderates the relationship between job satisfaction and perceptions of organisational commitment. The study sample consisted of 839 employees of a railway organisation in the Democratic Republic of Congo (DRC) (women... -
Organisational climate, job satisfaction, and leadership style influences on organisational commitment among South African soldiers
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Thulile N. Makhathini --- Department of Industrial Psychology, Faculty of Military Sciences, South Africa Gideon A.J. Van Dyk --- Department of Industrial Psychology, Faculty of Military Sciences, South AfricaThe study examined the extent to which organisational climate, job satisfaction, and leadership styles influences organisational commitment among South African soldiers. Study participants were 150 military personnel (41% females, 32% privates, 35% Non-Commissioned Officers (NCOs), age range 24 to 64)... -
Population connectivity of an overexploited coastal fish, Argyrosomus coronus (Sciaenidae), in an ocean-warming hotspot
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: R Henriques --- Evolutionary Genomics Group, Department of Botany and Zoology, South Africa WM Potts --- Department of Ichthyology and Fisheries Science, South Africa CV Santos --- Faculdade de Ciências da Universidade Agostinho Neto (FCUAN), Angola WHH Sauer --- Department of Ichthyology and Fisheries Science, South Africa PW Shaw --- Department of Ichthyology and Fisheries Science, South AfricaThe West Coast dusky kob Argyrosomus coronus is a commercially exploited fish with a distribution confined to the Angola–Benguela Frontal Zone (ABFZ) of the southeastern Atlantic Ocean. A previous study revealed that during a recent period of local warming the... -
Terrestrial discharge influences microbioerosion and microbioeroder community structure in coral reefs
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: SA Mwachireya --- Kenya Marine and Fisheries Research Institute (KMFRI), Kenya M Carreiro-Silva --- Department of Oceanography and Fisheries (IMAR network), Portugal BE Hartwick --- Department of Biological Sciences, Canada TR McClanahan --- Wildlife Conservation Society, Marine Programs, USAMicrobioerosion rates and microbioeroder community structure were studied in four Kenyan protected coral-reef lagoons using shell fragments of Tridacna giant clams to determine their response to the influence of terrestrial run-off. Fourteen different microbioeroder traces from seven cyanobacteria, three green... -
Temperature control of the distributional range of five C3 grass species in the uKhahlamba-Drakensberg Park, KwaZulu-Natal, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Luke K Bentley --- South African Environmental Observation Network, South Africa Tim G O’Connor --- South African Environmental Observation Network, South AfricaGlobal climate change is expected to influence the distribution of global biodiversity. C4 and C3 perennial grasses co-occur in the fire-prone KwaZulu-Natal uKhahlamba-Drakensberg grasslands, with C3 grass species occurring at cooler locations in the mountain range and C4 grass species... -
Oat silage for grazing dairy cows in small-scale dairy systems in the highlands of central Mexico
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Victor Andrés Burbano-Muñoz --- Instituto de Ciencias Agropecuarias y Rurales, Mexico Felipe López-González --- Instituto de Ciencias Agropecuarias y Rurales, Mexico Julieta Gertrudis Estrada-Flores --- Instituto de Ciencias Agropecuarias y Rurales, Mexico Pedro Alan Sainz-Sánchez --- Institut für Tropische Agrarwissenschaften (Hans-Ruthenberg-Institute), Fachgebiet Tierernährung und Weidewirtschaft in den Tropen und Subtropen, Germany Carlos Manuel Arriaga-Jordán --- Instituto de Ciencias Agropecuarias y Rurales, MexicoThe objective was to evaluate the provision of oat silage (Avena sativa) to supplement grazing dairy cows on pastures of perennial ryegrass (Lolium perenne), festulolium (Lolium multiflorum × Festuca pratense) and white clover (Trifolium repens) during the dry season when... -
Prediction of primary salinity, sodicity and alkalinity in South African soils
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J Piet Nell --- Agricultural Research Council–Institute for Soil, South Africa Cornelius W van Huyssteen --- Department of Soil, Crop and Climate Science, South AfricaSeveral attempts have in the past been made to map the primary salinity, sodicity and alkalinity of South African soils. These have typically been based on personal experience and/or limited data and also failed to quantify the accuracy of prediction... -
Farm household typology and adoption of climate-smart agriculture practices in smallholder farming systems of southern Africa
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Clifton Makate --- International Centre for Tropical Agriculture (CIAT), Zimbabwe Marshall Makate --- Department of Economics, USA Nelson Mango --- International Centre for Tropical Agriculture, UgandaEnhancing adoption rates of climate-smart agriculture practices and their impact on livelihoods requires promotional persistence, complemented by a thorough socioeconomic analysis that recognizes the heterogeneity of smallholder farmers. Farm typologies are a useful tool to assist in understanding and unpacking... -
Organisation climate mediation of the relationship between hardiness, self-efficacy, and job satisfaction among military followers
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Palesa Luzipo --- Department of Industrial Psychology, Faculty of Military Sciences, South Africa Gideon Van Dyk --- Department of Industrial Psychology, Faculty of Military Sciences, South AfricaThis study examined influences of organisational climate on hardiness, self-efficacy, and job satisfaction in a military setting. Data were collected from 120 South African National Defence Force (SANDF) military personnel (female = 36%; officers = 90%; age range = 24–64... -
Mapping dynamics of low-carbon energy innovation for small hydropower technology in Nigeria
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Maruf Sanni --- National Centre for Technology Development, Federal Ministry of Science and Technology, NigeriaThe urgent need for clean innovative energy systems is widely recognized amidst increasing concerns over energy insecurity, climate change and other environmental impacts of a carbon-constrained economy. Several renewable energy technologies such as small hydropower (SHP) are poised to play... -
Building low-carbon energy innovation systems in Africa
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Radhika Perrot --- Independent researcher, South Africa Maruf Sanni --- National Centre for Technology Management, NigeriaThe objective of this special issue is to bring together research on low-carbon innovation in the African context. The aim is to assess and compare various cases of low-carbon energy development in Africa in an effort to understand the underlying... -
Soil organic carbon storage in a tropical freshwater wetland: the influence of vegetation type
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: David Were --- , Ethiopia Frank Kansiime --- , Uganda Tadesse Fetahi --- , Ethiopia Thomas Hein --- , AustriaThe impact of different vegetation communities on soil organic carbon (SOC) in a tropical freshwater wetland in Uganda was investigated. SOC content, density and storage potential were determined under three different dominant vegetation communities: Cyperus papyrus L., Typha latifolia L... -
Mapping tree aboveground biomass and carbon in Omo Forest Reserve Nigeria using Landsat 8 OLI data
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Iveren B Chenge --- Department of Forest Resources Management, Nigeria Johnson SA Osho --- Department of Forest Resources Management, NigeriaProtected areas in Nigeria are important ecosystems for carbon storage. The aim of this study was to estimate and map tree aboveground biomass (TAGB) and carbon (TAGC) within a tropical forest in Nigeria. Stepwise regression analysis was implemented to develop... -
Biological soil crusts of the Succulent Karoo: a review
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Bettina Weber --- Max Planck Institute for Chemistry, Germany Alexandra Tamm --- Max Planck Institute for Chemistry, Germany Stefanie Maier --- Max Planck Institute for Chemistry, Germany Emilio Rodríguez-Caballero --- Department of Desertification and Geo-Ecology, Experimental Station of Arid Zones (EEZA-CSIC), SpainThe Succulent Karoo is characterised by a dense coverage of biological soil crusts (biocrusts) belonging to different types and successional stages. Whereas the Soebatsfontein region hosts cyanobacteria-dominated and minor amounts of lichen- and bryophyte-dominated biocrusts, the Knersvlakte comprises a rich... -
Extreme significant wave height climate in the Gulf of Guinea
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: AA Osinowo --- , Nigeria EC Okogbue --- , Nigeria EO Eresanya --- , Nigeria OS Akande --- , NigeriaThis article investigates spatio-temporal trends for different return periods of extreme significant wave height (SWH) in the Gulf of Guinea (GG), northeastern tropical Atlantic Ocean, based on a 37-year (1980–2016) wave hindcast. High-resolution reanalysis windfield datasets were used to force... -
The presence of artificial water points structures an arid-zone avian community over small spatial scales
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Salamatu Abdu --- FitzPatrick Institute of African Ornithology, DST-NRF Centre of Excellence, South Africa Alan TK Lee --- FitzPatrick Institute of African Ornithology, DST-NRF Centre of Excellence, South Africa Susan J Cunningham --- FitzPatrick Institute of African Ornithology, DST-NRF Centre of Excellence, South AfricaWater plays a key role in avian thermoregulation, especially when environmental temperatures approach or exceed body temperature. Birds living in arid environments need to either be adapted to life with unreliable access to water, or engage in large-scale movements to... -
Comparison of physiological responses to high temperatures in juvenile and adult Cape Rockjumpers Chaetops frenatus
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Krista N Oswald --- Department of Zoology, South Africa Alan TK Lee --- Fitzpatrick Institute of African Ornithology, DST/NRF Centre of Excellence, South Africa Ben Smit --- Department of Zoology, South AfricaConcerns about climate change have led to an increase in studies on physiological mechanisms birds possess to cope with increasing temperatures. For range-restricted species such as Cape Rockjumpers Chaetops frenatus, whose population declines are correlated with habitat warming, we identified... -
Climate change and adaptation-induced engineering design and innovations in water development projects in Africa
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Berhanu F. Alemaw --- Department of Geology, Botswana Nako M. Sebusang --- Department of Civil Engineering, BotswanaIn this paper, a framework for best practice for incorporating climate change and adaption in Africa is presented from mainly the water resources design and management perspectives to chart systematically ways of incorporating climate change in engineering design of water... -
Sustaining African water resources under climate change: Emerging adaptation measures from UNFCCC national communications
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Shepherd Muchuru --- Institute for Corporate Citizenship, University of South Africa, South Africa Godwell Nhamo --- Institute for Corporate Citizenship, University of South Africa, South AfricaThe changing climate is expected to affect the demand for and availability of water resources. The African continent is known to be water scarce with highly temporal and spatially variable rainfall. This paper explores climate-induced challenges faced in the water... -
Allometric equations from a non-destructive approach for biomass prediction in natural forest and plantation in West Africa
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: SA Hamzath Kora --- Laboratory of Applied Ecology, Faculty of Agronomic Sciences, Benin GH Sabin Guendehou --- Laboratory of Applied Ecology, Faculty of Agronomic Sciences, Benin Cédric A Goussanou --- Laboratory of Applied Ecology, Faculty of Agronomic Sciences, Benin Achille E Assogbadjo --- Laboratory of Applied Ecology, Faculty of Agronomic Sciences, Benin Brice Sinsin --- Laboratory of Applied Ecology, Faculty of Agronomic Sciences, BeninAllometric equations are required for a rapid estimation of commercial timber volume and forest biomass stocks. In order to preserve the forest ecosystem, this study applied a non-destructive sampling approach to measure biophysical properties of living trees. From these measurements,... -
Transformational leadership, diversity climate, and job satisfaction in selected South African companies
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Sean McCallaghan --- NWU Business School, South Africa Leon T. B. Jackson --- NWU Business School, WorkWell Research Unit, South Africa Marita M Heyns --- Optentia Focus Area, South AfricaThis study investigated the relationship between transformational leadership, diversity climate, and job satisfaction in a selection of South African companies. Participants were a convenience sample of 263 employees from the Gauteng Province (white = 69.3%). They completed measures for transformational leadership, diversity... -
The taste of a healthy and sustainable diet: What is the recipe for the future?
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Peter R Klosse --- Gastronomy, Hotel Management School Maastricht, The NetherlandsThe world faces serious challenges and many of those involve current food behaviour. People have been seduced into liking food and drinks that are neither healthy nor good for the environment. Clearly we need a robust food system that is... -
Localised intermittent upwelling intensity has increased along South Africa’s south coast due to El Niño–Southern Oscillation phase state
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: MI Duncan --- Department of Ichthyology and Fisheries Science, South Africa NC James --- South African Institute for Aquatic Biodiversity (SAIAB), South Africa AE Bates --- Department of Ocean Sciences, Canada WS Goschen --- Institute for Coastal and Marine Research, Ocean Sciences Campus, South Africa WM Potts --- Department of Ichthyology and Fisheries Science, South AfricaThe El Niño–Southern Oscillation (ENSO) phase state is reported to drive interannual variability in sea temperatures along South Africa’s south coast through its influence on wind-induced upwelling processes. Whether ENSO drives the intensity of localised, abrupt, intermittent upwelling is less... -
Bringing out the creativity in you: How a competitive climate and mentoring kindle creative work involvement of university academic staff
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Ebele E. Nnadozie --- Department of Psychology, Nigeria Lawrence E. Ugwu --- Department of Psychology, Nigeria Ibeawuchi K. Enwereuzor --- Department of Psychology, Nigeria Emmanuella Ugochi Anozie --- Department of Sociology/Psychology and Criminology and Security Studies, Nigeria Florence Chiji Albi-Oparaocha --- College of Medicine, NigeriaWe investigated mentoring as a moderator between competitive climate and employee creative work involvement. Participants were 270 academic staff of a Nigerian federal university (male = 155 [57.41%] and female = 115 [42.59%]). The participants were employed as Graduate Assistant = 15 (5.56%), Assistant Lecturer = 78 (28.89%),... -
Examining the mediating effect of diversity climate on the relationship between destructive leadership and employee attitudes
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Sean McCallaghan --- NWU Business School, South Africa Leon T. B. Jackson --- NWU Business School, WorkWell Research Unit, South Africa Marita M Heyns --- Optentia Research Focus Area, South AfricaThe study sought to investigate the mediating effect of diversity climate on the relation between a destructive leadership style and employee attitudes of organisational commitment, job satisfaction, and intention to quit. Participants were employees from the financial, banking, retail, and... -
Megaherbivore response to droughts under different management regimes: lessons from a large African savanna
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Izak PJ Smit --- , South Africa Mike JS Peel --- , South Africa Sam M Ferreira --- , South Africa Cathy Greaver --- , South Africa Danie J Pienaar --- , South AfricaDroughts are predicted to increase in frequency and intensity for large parts of Africa. It is unclear how this may impact native grazers in protected areas, and how these outcomes may differ under contrasting management approaches. Reducing artificial water sources... -
Drought challenges for nature tourism in the Sabi Sands Game Reserve in the eastern region of South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Tamzyn Smith --- , South Africa Jennifer M Fitchett --- , South AfricaThe Lowveld of South Africa, a savanna biome region economically dominated by nature tourism, has experienced a prolonged dry period beginning in approximately 2015. Despite emerging literature on climate and tourism in southern Africa, the challenges to tourism in the... -
Recent droughts in the Kruger National Park as reflected in the extreme climate index
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Johan Malherbe --- , South Africa Izak PJ Smit --- , South Africa Konrad J Wessels --- , United States Philip J Beukes --- , South AfricaAssociated with the 2015/2016 El Niño, extreme drought occurred over the Lowveld of South Africa. The area includes the Kruger National Park (KNP). Significant die-offs of a mega herbivore species occurred, corroborated by census data in KNP. The drought situation... -
Observations on the natural history of a savanna drought
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Izak PJ Smit --- , South Africa William J Bond --- , South AfricaDrought studies are often opportunistic and post hoc, where a drought fortuitously occurs during a research project that was not specifically designed to study the drought, but where researchers capitalised on the opportunity. These studies often lack focus on formulating... -
Forb community responses to an extensive drought in two contrasting land-use types of a semi-arid Lowveld savanna
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: F Siebert --- , South Africa J Klem --- , South Africa H Van Coller --- , South AfricaProjected increases in the frequency and severity of drought events are expected to impose changes in the ecology of native forb communities in semi-arid ecosystems. We examined the state of forb communities during, and directly after an extreme drought event... -
Effect of drought on communal livestock farmers in KwaZulu-Natal, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: S Vetter --- , South Africa VL Goodall --- , South Africa R Alcock --- , South AfricaDespite the size of the informal small-scale farming sector and its livestock holdings in South Africa, there has been little detailed work to assess how livestock populations are affected by drought. South Africa experienced a major drought in 2015–2016. We... -
Biomass partitioning in an endemic southern African salt marsh species Salicornia tegetaria (Chenopodiaceae)
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: CE Brown --- Department of Biodiversity and Conservation Biology, South Africa A Rajkaran --- Department of Biodiversity and Conservation Biology, South AfricaThe below ground biomass of salt marsh species accounts for more than half of the total plant biomass in salt marsh systems, yet no biomass data exist for salt marsh species in South Africa. The aims of the current study... -
High flow variability and storm events shape the ecology of the Mbhashe Estuary, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: NC James --- South African Institute for Aquatic Biodiversity, South Africa JB Adams --- Institute for Coastal and Marine Research, South Africa AD Connell --- South African Institute for Aquatic Biodiversity, South Africa SJ Lamberth --- South African Institute for Aquatic Biodiversity, South Africa CF MacKay --- Oceanographic Research Institute, South Africa GC Snow --- Institute for Coastal and Marine Research, South Africa L van Niekerk --- Institute for Coastal and Marine Research, South Africa AK Whitfield --- South African Institute for Aquatic Biodiversity, South AfricaThe possible impacts of extreme events on the ecology of selected aquatic biota within the Mbhashe Estuary were investigated during a four year (2010–2013) spring sampling programme. During periods of low to average flow conditions the estuary is shallow, turbid... -
Interactive effects of pH and temperature on native and alien mussels from the west coast of South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: MP Emanuel --- Marine Research Institute, Department of Biological Sciences, South Africa D Pillay --- Marine Research Institute, Department of Biological Sciences, South Africa M van der Merwe --- Centre for Higher Education Development, South Africa GM Branch --- Marine Research Institute, Department of Biological Sciences, South AfricaGlobal warming and ocean acidification influence marine calcifying organisms, particularly those with external shells. Among these, mussels may compensate for environmental changes by phenotypic plasticity, but this may entail trade-offs between shell deposition, growth and reproduction. We assessed main and... -
Carbon stock in the community managed Sal (Shorea robusta) forests of Dadeldhura district, western Nepal
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Suresh Prashad Bhatta --- , Nepal Anjana Devkota --- , NepalFour community-managed Sal forests in Dadeldhura district of Nepal were selected for the assessment of carbon stock. The stratified random sampling method was applied to measure the field data from 105 sample plots of 100 m2. The carbon stock of... -
Body mass and condition of a fynbos bird community: investigating impacts of time, weather and raptor abundance from long-term citizen- science datasets
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Alan Tristram Kenneth Lee --- , South Africa Phoebe Barnard --- , South Africa Mike Fraser --- , South Africa Chris Lennard --- , South Africa Ben Smit --- , South Africa Hans-Dieter Oschadleus --- , South AfricaVariation in body size, especially mass, is a function of local environmental conditions for any given species. Recent recorded decreases in body size of endotherms have been attributed to climate change in some cases. This prediction is based on the... -
Trends in populations of Blue Crane Anthropoides paradiseus in agricultural landscapes of Western Cape, South Africa, as measured by road counts
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Donella J Young --- , South Africa James A Harrison --- , South AfricaPopulation trends of the Blue Crane Anthropoides paradiseus were monitored by volunteers participating in Coordinated Avifaunal Roadcounts (CAR) in the Overberg and Swartland agricultural regions of the Western Cape province from 1993 and 1996, respectively, until 2019 in the Overberg... -
Impact of climate change on yield and water use efficiencies of potato in different production regions of South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: AC Franke --- , South Africa LN Muelelwa --- , South Africa JM Steyn --- , South AfricaIn South Africa, the potato is produced in regions with different climates. Climate change is expected to result in higher temperatures, thus increasing the incidence of heat stress, but lowering the risk of frosts in mid-altitude areas. Increasing ambient carbon... -
Clean energy transition in a developing society: Perspectives on the socioeconomic determinants of Solar Home Systems adoption among urban households in southeastern Nigeria
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Edlyne Eze Anugwom --- , Nigeria Kenechukwu Nwakego Anugwom --- , Nigeria Oliver Ifeanyi Eya --- , NigeriaThis study identifies factors that constrain the adoption of clean energy sources by urban households in southeastern Nigeria, using the Solar Home Systems (SHS) as a case study. It is premised on the assumption that adoption of innovation is affected... -
Tailoring conservation farming to climate change in the smallholder farming sector: Case of lowveld areas in Zimbabwe
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Christopher Tafara Gadzirayi --- , Zimbabwe Desmond Manatsa --- , Zimbabwe Edward Mutandwa --- , ZimbabweThis study on tailoring conservation farming to climate change attempted to design and proffer ways that enhance the application of climate information in managing climate-related production risks among smallholder farmers. The study characterized climate hazards related to crop and livestock... -
Characterisation of ecosystem-based adaptations to drought in the central cattle corridor of Uganda
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Susan Nanfuka --- , Uganda David Mfitumukiza --- , Uganda Anthony Egeru --- , UgandaEcosystems provide climate-change adaptation opportunities including ecosystem services, adaptation benefits and livelihood improvement especially for natural resource dependent communities. To contribute to the understanding of location specific adaptation processes of predominantly agro-pastoralists, a study was carried out in the central... -
Servant leadership, diversity climate, and organisational citizenship behaviour at a selection of South African companies
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Sean McCallaghan --- , South Africa Leon T. B. Jackson --- , South Africa Marita M. Heyns --- , South AfricaThe study examined the mediation effect of diversity climate on the relationship between servant leadership and organisational citizenship behaviour (OCB). Participants were a convenience sample of 262 employees from South African financial, industrial, manufacturing, and retail sectors (male = 52.9%;... -
Eco-friendly environment in Cameroon: Does an increase in fossil fuel energy consumption influence economic growth?
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Thales Pacific Yapatake Kossele --- , Central African Republic Manuella Ndjakwa Tonga --- , Cameroon Magalie Gabriella Ngaba Mbai-Akem --- , Central African RepublicThis study examines the relationship between fossil fuel consumption and economic growth in ensuring energy conservation steps to reduce reliance on fossil fuels for a friendly environment in Cameroon covering the period of 1996–2013. The Auto-Regressive Distributed Lag (ARDL) bounds... -
Inter-annual growth response of three Miombo tree species to climatic effects
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Francis Munalula --- , South Africa Thomas Seifert --- , South Africa Martina Meincken --- , South AfricaMiombo woodlands cover a large part of Southern Africa and contribute an important wood source for the local wood industry. The already observed and further predicted changes in climatic patterns can be expected to affect the wood properties of Miombo... -
Application of a general methodology to understand vulnerability and adaptability of the fisheries for small pelagic species in the Benguela countries: Angola, Namibia and South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: KL Cochrane --- , South Africa K Ortega-Cisneros --- , South Africa JA Iitembu --- , Namibia CI dos Santos --- , Angola WHH Sauer --- , South AfricaThe fisheries for small pelagic species in Angola, Namibia and South Africa fulfil important social and economic roles but have undergone substantial changes in recent years, some of which are likely to be related to climate change. This assessment of... -
Understanding the relevance of indigenous knowledge on climate change adaptation among mixed farmers in the Ngono River Basin, Tanzania
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Theobald Frank Theodory --- , TanzaniaClimate change poses major threats to people and ecosystems. In many areas, climate change impacts have affected the availability of basic necessities including freshwater, food security, and energy. Developing countries are more adversely impacted by climate change and are less... -
Longitudinal species turnover rates are predictable and should guide location of sampling sites for South African river surveys to assess aquatic biodiversity
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: NA Rivers-Moore --- , South Africa FC de Moor --- , South AfricaRepresentative samples of biota collected relative to environmental gradients are important for measuring present distributions and predicting shifts in distribution of taxa in response to climate change or reduced river connectivity. Based on river ecology theory and established measures of... -
Grass functional trait responses to experimental warming and fire in Afromontane grasslands
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Mariska te Beest --- , The Netherlands Anne Kleinjan --- , The Netherlands Veerle Tuijnman --- , The Netherlands Nicky Findlay --- , The Netherlands Thembeka Mvelase --- , South Africa Elizabeth le Roux --- , United Kingdom Michelle Tedder --- , South Africa Paul Gordijn --- , South Africa Susan Janse van Rensburg --- , South AfricaClimate change is one of the main challenges facing humanity in the coming century. To understand the impact of climate change on biodiversity and ecosystem functioning, we urgently require a better understanding of plant responses to climate change. To address... -
A case study of rangeland vegetation changes from 1979 to 2016 in the Middle Atlas Mountains of Morocco
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: A El Aich --- , Morocco ME Fernández-Giménez --- , United States M Rouzi --- , Morocco CL Alados --- , SpainThis case study assessed changes in vegetation composition of a 0.8 ha rangeland site over the past four decades, in relation to changes in temperature and to an increase in grazing pressure. The frequency and standing crop (biomass) of species... -
Modelling continental range shift of the African elephant (Loxodonta africana) under a changing climate and land cover: implications for future conservation of the species
Item type: Journal Article • Journal: African Zoology • Authors: Sintayehu W Dejene --- , Ethiopia Kudzai S Mpakairi --- , Rajapandian Kanagaraj --- , Germany Yussuf A Wato --- , Kenya Sewnet Mengistu --- , EthiopiaClimate and land use change are anticipated to alter the distribution of wildlife, due to their impact on the quantity and quality of forage availability, water cycle, as well as competition for key resources. Using an ensemble of species distribution... -
Tier 2 above-ground biomass expansion functions for South African plantation forests
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Steven Dovey --- , South Africa Ben du Toit --- , South Africa Jacob Crous --- , South AfricaCarbon stocks estimated for greenhouse gas emission reporting in South African plantation forests require improvement for local relevance. We developed biomass expansion and conversion factor (BECF) models to convert enumeration data to above-ground biomass (AGB) for major genera. Local biomass... -
Assessing the impact of climate change on crop production in southern Africa: a review
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: AC Franke --- , South AfricaThis paper provides a systematic review of studies assessing the impact of climate change on crop yields in southern Africa. Moreover, it synthesises the current knowledge of the impact of elevated ambient CO2 levels (eCO2) and temperatures on physiological processes,... -
Potentials of leys or pasture-based forage production in Nigeria
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Saheed Olaide Jimoh --- , China Yunusa Muhammad Ishiaku --- , Nigeria Tracy Burnett --- , United States Ahmed Adeyemi Amisu --- , Nigeria Rasheed Adekunle Adebayo --- , South AfricaFulani pastoralists are widely distributed across the six geographical zones of Nigeria and migrate from north to south in search of natural grazing lands at times of forage scarcity. This migration leads annually to resource use conflict and deadly attacks... -
Investigating the effects of hypersalinity on the cardiac performance of the invasive gastropod Melanoides tuberculata (Müller, 1774)
Item type: Journal Article • Journal: African Zoology • Authors: TJ de Haas --- , South Africa LJ Connell --- , South Africa R Greenfield --- , South AfricaAnthropogenic activities have propelled the exploitation of natural environments, which along with climate change have resulted in salinity intrusion to freshwater ecosystems worldwide. To determine the extent the hypersalinity stressor has on freshwater ecosystems, physiological cardiac responses in the freshwater... -
Hot and bothered: alterations in faecal glucocorticoid metabolite concentrations of the sungazer lizard, Smaug giganteus, in response to an increase in environmental temperature
Item type: Journal Article • Journal: African Zoology • Authors: J Scheun --- , South Africa R Campbell --- , South Africa A Ganswindt --- , South Africa T McIntyre --- , South AfricaDespite the commonly held belief that reptiles are immune to extreme temperatures, global warming is predicted to result in the loss of 40% of all reptile species by 2080. In order to understand the effects of elevated temperature on African... -
Short-term recovery of macroinvertebrate communities following a flash flood in an urban river: a case study of the Palmiet River in Durban, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: N Khumalo --- , South Africa S Mdluli --- , South Africa J Lebepe --- , South AfricaExtreme floods have become frequent in the urban Palmiet River due to exacerbating climate change. Therefore, the current study aimed to explore a short-term recovery of macroinvertebrate communities following a flash flood in the Palmiet River, KwaZulu-Natal, South Africa. Different... -
Carbon production from seasonal litterfall in the Brazilian Atlantic Forest
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Greyce CB Maas --- , Brazil Carlos R Sanquetta --- , Brazil Renato Marques --- , Brazil Sebastião do A Machado --- , Brazil Mateus NI Sanquetta --- , Brazil Ana Paula D Corte --- , Brazil Iara M Barberena --- , BrazilForests play an important role in climate change, acting as a source or sink of carbon. There is, however, a lack of data regarding the carbon production from litterfall in tropical forests. The Atlantic Forest is one of the most... -
Investigating climate change awareness and adaptation strategies among female farmers in the Lephalale municipal area in South Africa
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Michael Obisesan --- , South Africa Munyaradzi Chitakira --- , South AfricaThis study evaluated climate change awareness and adaptation strategies among female farmers in the Lephalale municipal area in the Limpopo province of South Africa. A concurrent mixed method research approach was undertaken. Qualitative data were obtained through five focus group... -
Employee followership predispositions: Their perceptions of narcissistic traits in supervisors
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Jianjia He --- , China Shengmin Liu --- , China Jianbo Liu --- , China Thi Hoai Thuong Mai --- , ChinaWe investigated the relationship between employee perceptions of narcissistic supervision and employee followership. Further, we investigated the influences of employee proactive personality, self-efficacy, political skill, and team political climate on said relationship. Data were from 383 employees of a large... -
Corporate ethical values and ethical work climate influences on employees’ helping behaviour in a developing country’s banking sector setting
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Jeremy Mitonga-Monga --- , South Africa Aden-Paul Flotman --- , South AfricaThis study investigated the influence of corporate ethical values and work ethical climate on employees’ helping behaviour. A convenience sample (n= 421) of employees at a bank in the Democratic Republic of Congo were participants (female = 32.5%). The employers... -
Institutional and technological innovation for the bamboo sector as an instrument for development and climate change resilience in Ethiopia
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Tefera Belay Endalamaw --- , Ethiopia Dietrich Darr --- , GermanyGiven a huge resource base, numerous product and service functions, bamboo can top many of the species recommended for integrated rural development in the context of climate change. Despite this potential, there is gap in knowledge and innovation to make... -
Unleashing traditional ecological knowledge for biodiversity conservation and resilience to climate change in Rwanda
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Nathan Kanuma Taremwa --- , Rwanda Marie-Christine Gasingirwa --- , Rwanda Donat Nsabimana --- , RwandaThe purpose of this study was to assess how traditional ecological knowledge systems can be leveraged to achieve biodiversity conservation and build resilience to climate change. A sequential mixed methods approach was used to study 379 local people residing around... -
Could CO2-induced changes to C4 grass flammability aggravate savanna woody encroachment?
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Sarah Lynn Raubenheimer --- , South Africa Kimberley Simpson --- , South Africa Richard Carkeek --- , South Africa Brad Ripley --- , South AfricaFire plays an important role in maintaining the savanna tree-grass balance by limiting the recruitment of heat-sensitive tree seedlings. However, fire behaviour may change under increasing CO2 concentrations, due to altered flammability of the grassy layer. Here, we determined the... -
Historic changes in the fire-rainfall relationship at a woodland-savanna transition zone in southern Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: T Hamilton --- , South Africa S Archibald --- , South Africa S Woodborne --- , South AfricaSouthern Africa is dominated by fire-prone arid and semi-arid landscapes that are expected to experience increased maximum temperatures, rainfall variation and frequency of extreme rainfall events in the future. These conditions will affect fire and vegetation dynamics, but feedback and... -
The effect of changes in human drivers on the fire regimes of South African grassland and savanna environments over the past 100 years
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: James R Puttick --- , South Africa M Timm Hoffman --- , South Africa Timothy G O’Connor --- , South AfricaFire is a key regulator of tree cover in grassy ecosystems, but century-long changes in fire regimes have not been explicitly quantified in South Africa. This study aimed to determine changes in the fire regimes of South Africa’s grassy biomes... -
First assessment of the blue carbon storage of Rhizophora and Bruguiera mangrove stands on the island of Mauritius (western Indian Ocean)
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Phanesh Raghbor --- , Mauritius Linisha Devi Seeruttun --- , Mauritius Chandani Appadoo --- , MauritiusBlue carbon has gained recognition as a strategy to mitigate climate change. Mangroves allow significant amounts of carbon to be sequestered and stored and are considered an important component in the offset of greenhouse gas emissions. Despite this, little is... -
Influence of burning and defoliation on Festuca costata (Nees) in the Drakensberg
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Kabemba Mwambilwa --- , South Africa Kevin P Kirkman --- , South Africa Zivanai Tsvuura --- , South AfricaFire occurs naturally in grasslands and savannas and it is commonly used as a management tool to influence structure and composition. The ability of a grass plant to recover from fire may be influenced by the fire frequency and intensity... -
Identification of the landscape and bioclimatic characteristics that contribute to maintaining the allopatric distribution ranges of the Northern Black Korhaan Afrotis afraoides and the Southern Black Korhaan Afrotis afra
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Steven W Evans --- , South AfricaThe Northern Black Korhaan Afrotis afraoides and the Southern Black Korhaan Afrotis afra were previously considered conspecific, but were subsequently separated based on habitat, plumage, displays and vocalisations of the males and genetic differences. The Northern Black Korhaan is endemic... -
Indigenous knowledge and science-based predictors reliability and its implication for climate adaptation in Ghana
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Daniel Adu Ankrah --- , Ghana Nana Afranaa Kwapong --- , Ghana Seth Dankyi Boateng --- , GhanaThe study examined the reliability of indigenous knowledge and science-based predictors of climate and how this influences smallholder farmers’ practices and adaptations in Ghana’s three regions (Northern, Western and Volta regions). Two districts were selected in each region: Builsa South... -
Warming promotes growth of seedlings of a woody encroacher in grassland dominated by C4 species
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Lusanda Ncisana --- , South Africa Ntuthuko R Mkhize --- , South Africa Peter F Scogings --- , South AfricaLittle is known of warming effects on growth and defence of woody seedlings that potentially invade grasslands. We predicted that elevated temperatures would increase growth and spine length of Vachellia sieberiana seedlings growing (1) with or without grass in the... -
Long-term reference evapotranspiration trend and causative factors analysis in the sugarbelt area of the midlands of KwaZulu-Natal, South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Zoleka Ncoyini-Manciya --- , South Africa Michael John Savage --- , South Africa Sheldon Strydom --- , South Africa Alistair David Clulow --- , South AfricaGlobal warming is widely recognised, and its effects are becoming apparent throughout the world. Evaporation and evapotranspiration, the key components of the hydrological cycle, are generally expected to increase due to the rise in air and surface temperatures. However, previous... -
Thirty years of amphibian surveys in the Ukagurus Mountains of Tanzania reveal new species, yet others are in decline
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: H Christoph Liedtke --- Estación Biológica de Doñana (CSIC), Spain John V Lyakurwa --- University of Dar es Salaam, Tanzania Lucinda P Lawson --- University of Cincinnati, USA Michele Menegon --- Manchester Metropolitan University, UK Marina Garrido-Priego --- Estación Biológica de Doñana (CSIC), Spain Jean Mariaux --- Natural History Museum of Geneva, Switzerland Wilirk Ngalason --- University of Dar es Salaam, Tanzania Alan Channing --- North-West University, South Africa Nisha R Owen --- On the EDGE Conservation, UK Gabriela B Bittencourt-Silva --- Estación Biológica de Doñana (CSIC), Spain Mark Wilkinson --- Natural History Museum, UK Joanna G Larson --- University of Notre Dame, USA Václav Gvoždík --- Institute of Vertebrate Biology of the Czech Academy of Sciences, Czech Republic Simon P Loader --- Natural History Museum, UKRecords of biodiversity over time are important resources for assessing conservation priorities. However, such baseline data are missing for regions of key biodiversity importance. The Eastern Arc Mountains of Tanzania are known for their species richness and endemism, but not... -
The Elephant Marsh, Malawi – Part 1: reconstruction of the historic hydromorphology
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: AL Birkhead --- , South Africa CA Brown --- , South Africa H Bukhari --- , South Africa MK Reinecke --- , South Africa WO Mgoola --- , Malawi JK Nyirenda --- , MalawiThe Elephant Marsh lies on the floodplain of the lower Shire River, in southern Malawi. It is both a cultivated, seasonal floodplain and an area of permanent shallow lakes. The marsh is highly biodiverse, has a productive fishery and supports... -
The Elephant Marsh, Malawi – Part 2: two-dimensional hydrodynamic modelling in support of an eco-social assessment
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: AL Birkhead --- , South Africa MK Reinecke --- , South Africa CA Brown --- , South Africa WO Mgoola --- , Malawi JK Nyirenda --- , MalawiThe Elephant Marsh lies on the floodplain of the lower Shire River, in southern Malawi. It is both a cultivated, seasonal floodplain and a wetland, characterised by a complex mosaic of meandering channels, marshland and shallow lakes. In 2016, the... -
Heterogeneous investor attention to climate risk: Evidence from a unique dataset
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Hyejin Park --- , South Korea Minki Kim --- , South Korea Doojin Ryu --- , Republic of KoreaThe COVID-19 pandemic has led global investors to draw a parallel between pandemics and climate risk, focusing their attention on climate risk. We examine COVID-19’s effect on investors’ awareness of climate risk by analysing novel trading data for Korean-listed firms... -
“Working time” in environmental activism: Engaging “slow violence” in the Philippi Horticultural Area
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Matthew Wingfield --- Stellenbosch University, South AfricaTracing the history of activism in post-apartheid South Africa from the Treatment Action Campaign to the Social Justice Coalition, amongst others, one is able to develop an account of various practices and strategies that have been utilised to leverage state... -
Work-place diversity climate: Its association with racial microaggressions and employee work-place well-being
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Sean McCallaghan --- North-West University, South AfricaThe study examined the role of work-place diversity climate in relation to employees’ experiences of racial microaggressions (RMAs), their organisational commitment, turnover intentions, job satisfaction, and organisational citizenship behaviour (OCB) in selected South African organisations. The employees (n = 262;... -
Enhancing predictive precision of dominant height projection equations for eucalypts by incorporating rainfall and temperature terms
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Brian G Mandigora --- Stellenbosch University, South Africa David M Drew --- Stellenbosch University, South AfricaShort-rotation forest stands are sensitive to extreme climate conditions during their growth period, which presents a challenge to managing forests and modelling forest growth in a constantly changing climate. We developed climate-sensitive dominant height models for the Eucalyptus grandis ×... -
Using modern models to test Poynton's predictions
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Clemens Schreiner --- Zoologisches Forschungmuseum Alexander Koenig, Germany Dennis Rödder --- Zoologisches Forschungmuseum Alexander Koenig, Germany G. John Measey --- Nelson Mandela Metropolitan University, South AfricaIn his seminal work ‘The Amphibia of southern Africa: a faunal study’, Poynton identified and contrasted two centres of amphibian importance, the temperate south-western Cape (“Cape”) and tropical northeast (“Tropical”). With reference to the dominant role of climate fluctuations resulting... -
A balanced perspective on the contribution of extensive ruminant production to greenhouse gas emissions in southern Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Michiel M Scholtz --- , South Africa Frans J Jordaan --- , South Africa N Thuli Chabalala --- , South Africa Georgette M Pyoos --- , South Africa M Joel Mamabolo --- , South Africa Frederick WC Neser --- University of the Free State, South AfricaThere is a general perception that ruminants produce large quantities of greenhouse gases (GHG) which contribute to global warming. Ruminant production is also known as the world’s largest user of land, and southern Africa is no exception. Recent estimates indicate... -
Perceived impact of climate variability and change on livelihoods of smallholder farmers in Lesotho
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Christopher Dick-Sagoe --- University of Botswana, Botswana Kwame Nkrumah Hope --- Akenten Appiah-Menka University of Skills Training and Entrepreneurial Development, Peter Asare-Nuamah --- University of Environment and Sustainable Development, GhanaLesotho is a poor country that heavily depends on rain-fed agriculture for socioeconomic growth and development. However, climate change threatens the agriculture sector, which has implications on the ability of the country to harness its development, especially among smallholder farmers,... -
The critical role that national culture and ethical leadership play in fostering employee commitment to service quality in the hotel industry
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Christina K. Dimitriou --- New Mexico State University, USAThe hotel industry is the most diverse and fastest growing industry in the world, offering its companies tremendous opportunities for international expansion and immersion in different cultures. However, this creates several obstacles that block the way to success. Through the... -
A natural terminal Pleistocene decline of African penguin populations enhances their anthropogenic extinction risk
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: H Beckett --- Stellenbosch University, South Africa OK Hansen --- Stellenbosch University, South Africa S von der Heyden --- Stellenbosch University, South Africa GF Midgley --- Stellenbosch University, South AfricaThe African penguin Spheniscus demersus, endemic to the coast of southern Africa, has suffered anthropogenic-driven population declines since 1900 and is now listed as Endangered on the IUCN Red List. Conservation efforts currently underway are informed by the species’ adaptive... -
Examining leaders’ emotional intelligence as a distal antecedent of employee engagement: The role of employee voice and trust in direct leadership
Item type: Journal Article • Journal: Africa Journal of Management • Authors: Okechukwu Ethelbert Amah --- Pan-Atlantic University,The study investigated leaders’ emotional intelligence (EI) as a distal antecedent of employee engagement, using employee voice and trust in direct leadership as mediating variables. Based on the Affective Event Theory, the study recognized the emotional intelligence of leaders as... -
Drought as a driver of vegetation change in Succulent Karoo rangelands, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: SJ Milton --- , South Africa H Petersen --- , South Africa G Nampa --- , South Africa H van der Merwe --- , South Africa JR Henschel --- , South AfricaWe document changes in rangeland during a prolonged drought in the arid Karoo. Rangeland in this arid region is species-rich and dominated by a mixture of long-lived succulent and non-succulent shrubs. Ranching has led to the domination of vegetation by... -
Long-term study of the drought impact on the phytoplankton concentration and assemblages in two water supply reservoirs in Namibia
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Johannes Sirunda --- Namibia Water Corporation, Namibia Paul Oberholster --- University of the Free State, South Africa Gideon Wolfaardt --- Stellenbosch University, South Africa Christoff Truter --- Toronto Metropolitan University, Canada Sean van der Merwe --- University of the Free State, South AfricaRising temperatures and increased occurrences of droughts, brought on by climate change, are expected to affect reservoir water levels. We hypothesised that the decrease in reservoir volumes in dams with desert climates will favour the growth of phytoplankton biomass, measured... -
Sensitivity simulation of sea surface temperature variability in coastal waters off East Africa in relation to the Indian Ocean Dipole
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: MC Manyilizu --- The University of Dodoma, TanzaniaEast African coastal waters in the tropical western Indian Ocean experience strong seasonality which varies yearly, leading to the establishment of a prominent interannual Indian Ocean Dipole (IOD). This has a significant influence on regional and global socio-economic, climatic and... -
Employee turnover intention: The predictive role of work-related burnout and psychosocial climate among university workers
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Michael Afari Baidoo --- University of Education, Ghana Edward Wilson Ansah --- University of Cape Coast, Ghana Samuel Essien-Baidoo --- University of Cape Coast, GhanaThis study aimed to investigate the extent to which work-related burnout and psychosocial environment predicted intention to leave employment. This cross-sectional survey sampled 1 222 Ghanaian university employees (females = 37.1%; age range = 18 to above 60 years; mean... -
Impact of adopting the climate-smart crop varieties on food security in southwestern Ethiopia
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Dubale Abate --- Injibara University, Ethiopia Henoke Tesfaye --- Wolkite University, Ethiopia Metadel Kassaw --- Wolkite University, Ethiopia Yonnas Addis --- Wolkite University, Ethiopia Habtamu Mossie --- Injibara University, EthiopiaClimate-smart crop varieties (CSV) are vital in improving food security by enhancing productivity while reducing problems of climate change. However, there is a low adoption of these varieties by the farmers in the study area due to lack of awareness... -
Huddling in the heat? Rarely seen thermoregulatory behaviours as Southern Pied Babblers Turdoides bicolor compete for cool microsites
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Amanda R Bourne --- University of Cape Town, South Africa Camilla Soravia --- The University of Western Australia, AustraliaHuddling is an important thermoregulatory behaviour used by many group-living endotherms to conserve energy during cold weather or periods of food scarcity. It is not typically considered a strategy for keeping cool during hot weather, largely because endotherms produce body... -
Regenerative economy: A pathway to a future-ready, sustainable Africa
Item type: Journal Article • Journal: Africa Journal of Management • Authors: Judith L. Walls --- Institute for Economy and the Environment, University of St.Gallen, Switzerland Leo Luca Vogel --- University of St.Gallen, SwitzerlandAfrica is experiencing a period of rapid economic growth, booming population, and migration as biodiversity is deteriorating and the climate is warming. Together, these represent grand societal and environmental challenges. The African Union and the United Nations both promote sustainable... -
A systematic review of remote sensing and machine learning approaches for accurate carbon storage estimation in natural forests
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Collins Matiza --- University of KwaZulu-Natal, South Africa Onisimo Mutanga --- University of KwaZulu-Natal, South Africa Kabir Peerbhay --- University of KwaZulu-Natal, South Africa John Odindi --- University of KwaZulu-Natal, South Africa Romano Lottering --- University of KwaZulu-Natal, South AfricaThe assessment of carbon storage in natural forests is paramount in the ongoing efforts against climate change. While traditional field-based methods for quantifying carbon storage pose challenges, recent advancements in remote sensing and machine learning offer efficient and innovative alternatives... -
Woody biomass increases across three contrasting land uses in Hurungwe, mid-Zambezi valley, Zimbabwe
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Tatenda Gotore --- , Zimbabwe Sam Bowers --- University of Edinburgh, United Kingdom Hilton GT Ndagurwa --- National University of Science and Technology, Zimbabwe Shakkie Kativu --- University of Zimbabwe, Zimbabwe Anderson Muchawona --- , Zimbabwe Pomerayi Mutete --- , Zimbabwe Mduduzi Tembani --- , Zimbabwe Ruramai Murepa --- , Zimbabwe Admore Mureva --- Bindura University of Science Education, Zimbabwe Casey Ryan --- University of the Witwatersrand, South Africa Denis Gautier --- Université Montpellier, France Laurent Gazull --- Université Montpellier, FranceGlobally, Miombo woodlands store important quantities of carbon, with tree cover and carbon stocks strongly determined by human use. We assessed woodland cover and aboveground carbon (AGC) stocks of miombo along a utilisation gradient on three different land use types,... -
Farmers’ choices and factors driving adoption of climate change adaptation strategies in saline coastal area of Bangladesh
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Mst. Esmat Ara Begum --- Bangladesh Agricultural Research Institute, Bangladesh Md. Abdur Rashid --- Bangladesh Agricultural Research Institute, Bangladesh Mohammad Ismail Hossain --- Bangladesh Agricultural University, Bangladesh Md. Anower Hossain --- Bangladesh Agricultural Research Institute, Bangladesh Md. Harunor Rashid --- Bangladesh Agricultural Research Institute, Bangladesh Mustafa Kamal Shahadat --- Bangladesh Agricultural Research Institute, Bangladesh Mohammed Mainuddin --- Water Security Program, CSIRO Environment, AustraliaGrowing climate change adaptation issues are driving the demand for efficient solutions in the agriculture sector, which will improve farmers’ livelihoods and economic situations. This study examined the perceptions of major climate risks and factors driving adoption of climate adaptation... -
Testing the thermal melanism hypothesis for Cape Cobras (Naja nivea) using community science photographic data
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Jody M Barends --- University of Johannesburg, South Africa Kim J Scholtz --- University of the Western Cape, South AfricaAnimal colour is a highly adaptive phenotypic trait that can respond to several selection pressures, including those facilitated by variations in climate. The thermal melanism hypothesis predicts that for ectotherms, selection for darker phenotypes should be highest in cooler areas... -
Perceived insider status and innovative behaviour of the new generation of employees: Mediating effect of innovative self-efficacy and moderation of group competitive climate
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Shujie Yuan --- Huangshan University, People's Republic of China Runbin Jiang --- Capital Normal University, People's Republic of ChinaBased on social identity theory, this study investigated the perceived insider status and innovative behaviour relationships in new generation employees by their innovative self-efficacy and group competitive climate in the work context. New generation employees (n = 338) drawn from... -
Carbon storage in a dry Miombo woodland area in Tanzania
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Ezekiel Edward Mwakalukwa --- Sokoine University of Agriculture, Tanzania Henrik Meilby --- Copenhagen University, Denmark Thorsten Treue --- Copenhagen University, DenmarkA persistent need exists, both politically and academically, for knowledge on carbon storage and sequestration potentials of forest ecosystems and their contributions to the global carbon balance. This study assessed carbon stocks of a 6 065 ha dry Miombo woodland... -
How open are African inventors? Open green technologies and patenting activities in Africa
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Maruf Sanni --- Obafemi Awolowo University, Nigeria Yeong Jae Kim --- KDI School of Public Policy and Management, Republic of KoreaOpen green innovation is essential to accelerate decarbonization in Africa. The dearth of empirical evidence on the current trajectory of green innovation in Africa often hinders appropriate green innovation policy design. This study investigates the incidence of collaboration in inventive... -
Population status of the range-restricted Red Lark Calendulauda burra in a conservation area stronghold
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Ryno Kemp --- DSI-NRF Centre of Excellence at the FitzPatrick Institute, South Africa Robin Colyn --- BirdLife South Africa, Science and Innovation Programme, South Africa Marc T Freeman --- DSI-NRF Centre of Excellence at the FitzPatrick Institute, South Africa Andrew E McKechnie --- DSI-NRF Centre of Excellence at the FitzPatrick Institute, South AfricaMany desert birds are vulnerable to anthropogenic global warming and landscape transformation, particularly in the case of range-restricted species. We quantified suitable habitat and the current population of Red Larks Calendulauda burra (family Alaudidae), a range-restricted southern African species, in... -
Social network and entrepreneurial intention of college students in China: A moderated mediation model
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Haoxiang Hou --- Jiangnan University, China Lichao Ma --- Institute of Education, Tsinghua University, China Dan Wang --- , ChinaImproving college students’ entrepreneurial intention is an effective strategy to cultivate entrepreneurial talents and build an innovation-driven country. However, the influencing mechanisms on college students’ entrepreneurial intention are still unclear. The study explored the impact of college students’ social network... -
Variations in the heart rate of Mediterranean mussels Mytilus galloprovincialis and brown mussels Perna perna under thermal stress on rocky shores of South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: K Beine --- University of Johannesburg, South Africa LJ Connell --- University of Johannesburg, South Africa R Greenfield --- University of Johannesburg, South AfricaIntertidal mussels experience prolonged emersion during low tide, followed by rapid submergence cooling during high tide, causing temperature-induced stress responses. This study examined variations in heart rate to investigate the relationship between emerged and submerged thermal stress in Mediterranean mussels... -
Using stakeholder knowledge to co-produce research priorities for a raptor species vulnerable to impacts of wind energy facilities
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Merlyn Nomusa Nkomo --- University of Cape Town, South Africa Megan Murgatroyd --- University of Cape Town, South Africa Samantha Ralston-Paton --- , South Africa Arjun Amar --- University of Cape Town, South AfricaThe global energy transition necessitates a rapid increase in infrastructure in developing countries, including for wind energy facilities (WEFs). Concerns arise regarding the negative impacts of WEFs on biodiversity, especially on birds of prey or raptors and other volant animals... -
Moving beyond technical competence in 3D printing industry in South Africa: The effect of emotional intelligence and organizational emotional climate in driving job performance
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Sampson Afrifa Jnr --- Central University of Technology, South Africa Thywill Cephas Dzogbewu --- Central University of Technology, South Africa Dennis Yao Dzansi --- Central University of Technology, South Africa Deon Johan de Beer --- Central University of Technology, South AfricaThe purpose of this study is to contribute to managerial research in the 3D printing industry in South Africa. Specifically, the study sought to examine the direct and moderating relationships between leader emotional intelligence, leader emotional behaviour, organizational emotional climate,... -
Greenhouse gas concentrations in tropical wetlands of the Cross River estuary, Nigeria
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: AB Andem --- University of Calabar, Nigeria OB Ojo --- University of Calabar, Nigeria RA Odey --- University of Calabar, Nigeria GE Eni --- University of Calabar, Nigeria OR Ibor --- University of Calabar, Nigeria IA Iwara --- University of Calabar, Nigeria VO Eyo --- Nigerian Maritime University, NigeriaThe Cross River estuary is a coastal wetland in the south-eastern part of the Niger Delta region of Nigeria with its hydrological cycle largely dependent on precipitation. The purpose of this study was to determine the greenhouse gas (GHG) concentrations... -
Calibration and evaluation of a CROPGRO Perennial Forage Model for Brachiaria humidicola yield simulation under future climate in subhumid environments of Ethiopia
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Fantahun Dereje --- Wallaga University, Ethiopia Ashenafi Mengistu --- Addis Ababa University, Ethiopia Diriba Geleti --- Ethiopian Institute of Agricultural Research, Ethiopia Fekede Feyissa --- Ethiopian Institute of Agricultural Research, Ethiopia Diriba Diba --- Wallaga University, Ethiopia Diego Pequeno --- , Mexico Buzunesh Tesfaye --- Wallaga University, EthiopiaCrop simulation models can be employed to assess the impacts of climate change and aid in strategic planning and decision making regarding forage strategies. This study focused on calibrating and assessing the performance of the CROPGRO Perennial Forage Model in... -
Integration of livestock into conservation agriculture systems in the Mediterranean climate region of South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Pieter A Swanepoel --- Stellenbosch University, South Africa Hendrik PJ Smit --- Stellenbosch University, South AfricaWithin the Mediterranean climate region of South Africa, the livestock sector constitutes a substantial contributor to the regional economy. Livestock integration is prevalent in conservation agriculture systems in this region. Crop rotation involving small grains and canola is combined with... -
A review of the contribution of the Grassland Society of Southern Africa to understanding conservation and wildlife research and management in southern Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Mike JS Peel --- Agricultural Research Council – Animal Production Institute, South Africa Peter JK Zacharias --- , South AfricaWe identified 440 papers and 81 book reviews published chronologically by the Grassland Society of Southern Africa (GSSA) over 60 years, determined as making a contribution to understanding the drivers and response variables affecting the management and use of grassland... -
Adapting to climate change amidst innovation diffusion and declining indigenous agricultural knowledge and practices in Ghana
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Pius Siakwah --- University of Ghana, Ghana Austin Dziwornu Ablo --- University of Ghana, Ghana Rosina Sheburah-Essien --- University of Ghana, Ghana Mariama Zaami --- University of Ghana, Ghana Joseph Awetori Yaro --- University of Ghana, GhanaThis paper examines how farmers adapt to climate change through innovation diffusion amidst declining indigenous agricultural knowledge and practices in Ghana. Small-scale farmers rely on indigenous practices and technological diffusion to cope with change even where the adoption levels of... -
Prevalence of mixed dermatophyte and non-dermatophyte onychomycosis in surveillance of patients with diabetes living in a sub-tropical climate and association with selected diabetes foot ulcer risk factors
Item type: Journal Article • Journal: Journal of Endocrinology, Metabolism and Diabetes of South Africa • Authors: AT Thompson --- University of KwaZulu-Natal, South Africa C Aldous --- University of KwaZulu-Natal, South Africa -
Influence of spatio-temporal variations in precipitation and temperature on the productivity of Eastern Lake Kyoga, Uganda
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: John Peter Obubu --- African Centre of Excellence for Water Management, Addis Ababa University, Ethiopia Robinson Odong --- Entomology and Fisheries Sciences, Makerere University, Uganda Seyoum Mengistou --- African Centre of Excellence for Water Management, Addis Ababa University, Ethiopia Tadesse Fetahi --- African Centre of Excellence for Water Management, Addis Ababa University, Ethiopia Tena Alamerew --- Ethiopian Institute of Water Resource, Addis Ababa University, Ethiopia Ekwacu Samuel --- Uganda National Meteorological Authority, UgandaSpatio-temporal variations in precipitation and temperature affect productivity in aquatic systems, mainly through nutrient dynamics. Shallow lakes are more vulnerable to spatio-temporal variations, yet they are an important resource for biodiversity conservation, water supply and fisheries. The eastern arm of... -
Simulated rangeland conditions and seasonal variations influence soil quality in semi-arid central South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: JDJ Marx --- University of the Free State, South Africa E Kotzé --- University of the Free State, South Africa JJ van Tol --- University of the Free State, South Africa PF Loke --- University of the Free State, South AfricaThe study examined long-term effects of rangeland conditions and seasonal variations on soil quality without confounding grazing effects. Samples were collected seasonally from good, moderate, poor, bare and cultivated rangeland conditions at soil depths of 0–10 cm and analysed for... -
Comparison of three methods to assess pre-harvest sprouting in wheat
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: SI Hull --- Stellenbosch University, South Africa PA Swanepoel --- Stellenbosch University, South Africa WC Botes --- Stellenbosch University, South Africa C Mutengwa --- University of Fort Hare, South AfricaPre-harvest sprouting (PHS) in wheat (Triticum aestivum L.) is an increasing concern, as climate variability alters rainfall patterns and air temperatures during harvest, intensifying risk in many cereal-producing regions. The untimely germination of the grain, PHS, is caused by germination... -
Climate adaptation, geopolitics, and structural exclusion in South African agriculture
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Michael J Savage --- South African Journal of Plant and Soil,Southern African agriculture stands at a critical intersection of accelerating climate risk and entrenched structural inequality. While climate change increasingly shapes global research and policy agendas, other intersecting forces—such as the divide between large-scale commercial agriculture and smallholder farming, the... -
Drivers of timber supply in an archetypical African economy, Cameroon: some policy implications for sustainable development
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Ernest L Molua --- University of Buea, CameroonTimber features as an important commodity in the trade portfolio of some African countries as it is accessible, lucrative, and necessary for construction and development. For these reasons, the supply of timber has implications for sustainable development. This research evaluated... -
Functional diversification and performance of wheat–canola rotations in the Western Cape
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A Louw --- Stellenbosch University, South Africa PA Swanepoel --- Stellenbosch University, South Africa S van der Westhuizen --- Stellenbosch University, South Africa J Strauss --- Stellenbosch University, South AfricaCrop rotation serves as a fundamental pillar within conservation agriculture (CA) farming systems, enabling the integration of more diverse crops and livestock. With increasing weather variability, new methods are needed to assess the long-term effects of diversification on the agronomic...