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Distribution, Size and Ownership of Forests in the Southern Cape
Item type: Journal Article • Journal: South African Forestry Journal • Authors: C.J. Geldenhuys --- Saasveld Forestry Research Centre,Indigenous forest of the southern Cape as delimited on 1:50 000 maps was analysed for distribution, size and ownership in six landscape zones: mountains, foothill, coastal platform, river valley, coastal scarp and dunes. I tested the hypothesis that forest distribution... -
A preliminary investigation of woody plant increase in the western Transvaal and implications for veld assessment
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: MargaretH. Friedel --- Division of Wildlife and Rangelands Research, AustraliaThe relationships between tree density and indices of pasture and soil condition were examined in Western Transvaal grasslands where Acacia karroo had increased following disturbance. The correlation between tree density and pasture condition was not linear, indicating a threshold in... -
The development of veld assessment in the northern Transvaal savanna I. Red Turfveld
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: M.H. Friedel --- Division of Wildlife and Rangelands Research, Australia A.C. Blackmore --- ,Grazing‐induced gradients in pasture species composition were characterized for the red turfveld of the Northern Transvaal savanna. A proposed classification of pasture species response to grazing was developed and the influence of state variables and driving forces other than grazing... -
The development of veld assessment in the northern Transvaal savanna II. Mixed bushveld
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: M.H. Friedel --- Division of Wildlife and Rangelands Research, AustraliaDifferences in pasture species composition as a consequence of grazing were used to develop a proposed classification of pasture species response to grazing, for both the Combretum apiculatum and the Acacia tortilis communities of the northern Transvaal mixed bushveld. The... -
VARIABILITY IN THE INVERTEBRATE FAUNA OF AN INTERMITTENT STREAM OVER THREE CONSECUTIVE MIDSUMMER PERIODS
Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences • Authors: M. C. Uys --- , South Africa J. H. O'Keeffe --- , South AfricaNon-perennial rivers in semi-arid regions are exposed to unpredictable and highly variable rainfall and hydrology which can have considerable effects on faunal organisation at different scales. Spatial and temporal dynamics in the aquatic invertebrate fauna of an aseasonal intermittent river... -
THE EFFECTS OF PHYSICAL DISTURBANCE ON AFROPTILUM SUDAFRICANUM (EPHEMEROPTERA: BAETIDAE) POPULATION DENSITIES IN A KENYAN MOUNTAIN STREAM
Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences • Authors: Jude M. Mathooko --- , , KenyaThe effects of physical disturbance on larval populations of the mayfly Afroptilum sudafricanum Lestage were examined in the Naro Morn River, Kenya. Disturbance was induced by stirring, shifting and relocating streambed substrates by hand. The method aimed to simulate natural... -
Do we understand the causes of bush encroachment in African savannas?
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: D WardBush encroachment affects the agricultural productivity and biodiversity of 10–20 million ha of South Africa. Many people believe that we understand the causes of bush encroachment. We do not. Many people believe that either fire or heavy grazing by domestic... -
Habitat factors influencing the distribution of Cymbopogon validus in Mkambati game reserve, Transkei
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: SheonaE. Shackleton --- Department of Botany, Republic of South Africa C.M. Shackleton --- Department of Botany, Republic of South AfricaThe factors influencing the distribution of Cymbopogon validus in Mkambati Game Reserve were investigated using multivariate techniques. C. validus was found to be present on nutrient‐rich, clay soils and absent from dystrophic, sandy soils. This could account for the patchy... -
Small‐scale reseeding trials in arid rangeland: Effects of rainfall, clearing and grazing on seedling survival
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: S.J. Milton --- FitzPatrick Institute, Republic of South AfricaSeeds of four indigenous plant species were sown in 1990 in small‐scale field trials in an arid, non‐seasonal rainfall region of the southern Karoo, South Africa. Seeds of a winter annual Tetragonia echinata (Aizoaceae) showed innate dormancy but those of... -
A Review of Mood and Anxiety Disturbances in Alzheimer's Disease: Implications for Treatment Outcomes
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Nafisa Cassimjee --- University of Pretoria,Alzheimer's disease was identified almost 100 years ago and cognitive morbidity (deterioration in memory, attention, language, and executive functioning) was regarded as a sufficient index for the description and diagnosis of this disease. Within the cognitive discourse, the importance of... -
An analysis of plant species distributions on the floodplain of the Okavango River, Namibia, with respect to impacts of possible water abstraction
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: NJ Diederichs WN ElleryThe proposed abstraction of water from the Okavango River in Namibia could potentially result in significant changes in the vegetation of floodplains downstream of the abstraction point. Direct gradient analysis was used to determine the distribution of the most common... -
The influence of pool size on species diversity and water chemistry in temporary rock pools on Domboshawa Mountain, northern Zimbabwe
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: A Anusa --- Tropical Resources Ecology Programme (TREP), Department of Biological Sciences, Zimbabwe HGT Ndagurwa --- Tropical Resources Ecology Programme (TREP), Department of Biological Sciences, Zimbabwe CHD Magadza --- Tropical Resources Ecology Programme (TREP), Department of Biological Sciences, ZimbabweThe effect of pool size (area and depth) on species diversity and physicochemical characteristics of rock pool habitats on Domboshawa Mountain, northern Zimbabwe, was studied from December 2006 to May 2007. Pools were categorised based on maximum depth. Pool duration... -
Road Building and the Survival of Indigenous Forest in the Southern Cape
Item type: Journal Article • Journal: South African Forestry Journal • Authors: C.J. Geldenhuys --- Saasveld Forestry Research Centre, D. Kotze --- Van Wyk and Louw Consulting Engineers, C.J. van der Merwe --- Saasveld Forestry Research Centre,The effects of road building activities on indigenous evergreen forest were investigated to quantify the impact, to provide guide-lines for minimising damage to forests during future road projects and to gain understanding of the response of different species. The investigation... -
Patterns of diversity along experimental gradients of disturbance and nutrient supply—the confounding assumptions of the Intermediate Disturbance Hypothesis
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: MC Pfaff --- Department of Zoology, South Africa C Hiebenthal --- , Germany M Molis --- , Germany GM Branch --- Department of Zoology, South Africa M Wahl --- , GermanyA model of the interactive effects of disturbance and productivity on diversity predicts peak diversity to shift towards higher disturbance regimes as productivity increases, confining the Intermediate Disturbance Hypothesis to intermediate productivity levels. We conducted a two-factorial (disturbance, nutrients) field... -
Role of the source community for the recovery of seagrass associated meiofauna: a field colonisation experiment with seagrass mimics in Diani Beach, Kenya
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: LN Daudi --- , Kenya JN Uku --- , Kenya M De Troch --- Biology Department, Marine Biology, BelgiumSeagrass communities are subject to frequent disturbances that can affect the associated fauna. Seagrass loss in Kenya has been mainly due to extensive grazing by the sea urchin Tripneustes gratilla, leading to habitat fragmentation. The challenge is whether the system... -
South Africa's coastal-breeding white-breasted cormorants: population trends, breeding season and movements, and diet
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: RJM Crawford --- Branch: Oceans and Coasts, Department of Environmental Affairs, South Africa RM Randall --- South African National Parks, South Africa PA Whittington --- East London Museum, South Africa L Waller --- CapeNature, South Africa BM Dyer --- Branch: Oceans and Coasts, Department of Environmental Affairs, South Africa DG Allan --- Durban Natural Science Museum, South Africa C Fox --- Ezemvelo-KZN Wildlife, South Africa AP Martin --- Department of Zoology, South Africa L Upfold --- Branch: Oceans and Coasts, Department of Environmental Affairs, South Africa J Visagie --- CapeNature, South Africa S Bachoo --- Ezemvelo KZN Wildlife, South Africa M Bowker --- School of Life Sciences, South Africa CT Downs --- School of Life Sciences, South Africa R Fox --- Addo Elephant National Park, South African National Parks, South Africa J Huisamen --- CapeNature, South Africa AB Makhado --- Branch: Oceans and Coasts, Department of Environmental Affairs, South Africa WH Oosthuizen --- Branch: Oceans and Coasts, Department of Environmental Affairs, South Africa PG Ryan --- Percy FitzPatrick Institute of African Ornithology, South Africa RH Taylor --- School of Life Sciences, South Africa JK Turpie --- Anchor Environmental Consultants, South AfricaWhite-breasted cormorants Phalacrocorax [carbo] lucidus breed around South Africa's coast and at inland localities. Along the coasts of the Northern, Western and Eastern Cape provinces, numbers breeding were similar during the periods 1977–1981 (1 116 pairs at 41 localities) and... -
Effect of human disturbance on the behavioural responses and offspring survival of grey-headed albatrosses Thalassarche chrysostoma at Subantarctic Marion Island
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: M Wheeler --- Animal Demography Unit, Department of Zoology, University of Cape Town, South Africa MS de Villiers --- Animal Demography Unit, Department of Zoology, University of Cape Town, South Africa R Altwegg --- Animal Demography Unit, Department of Zoology, University of Cape Town, South AfricaNest monitoring is commonly used to gather important seabird demographic data, but monitoring itself can affect seabird behaviour and offspring survival. The effect of monitoring on grey-headed albatrosses Thalassarche chrysostoma at Subantarctic Marion Island was investigated. The behaviour of chicks... -
Spatial changes in forest cover on the KwaNibela Peninsula, St Lucia, South Africa, during the period 1937 to 2008
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: BM Corrigan --- Department of Botany and Plant Biotechnology, South Africa M Kneen --- Department of Geography, Environmental Management and Energy Studies, South Africa CJ Geldenhuys --- Department of Forest and Wood Science, South Africa B-E van Wyk --- Department of Botany and Plant Biotechnology, South AfricaThe KwaNibela Peninsula is situated in the northernmost region of Lake St Lucia in KwaZulu-Natal. It is covered by forest patches of either Sand Forest or Coastal Forest within the Maputaland Coastal Vegetation. The area and the forests are heavily... -
The effect of anthropogenic disturbances on population structure and regeneration of Scorodophloeus fischeri and Manilkara sulcata in coastal forests of Tanzania
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: C Mligo --- Department of Botany, Tanzania HVM Lyaruu --- Department of Botany, Tanzania HJ Ndangalasi --- Department of Botany, TanzaniaScorodophloeus fischeri (Fabaceae, subfamily Caesalpinoideae) and Manilkara sulcata (Sapotaceae) are examples of tropical African hardwood species and are endemic to East African coastal forests. These plant species are threatened by human activities beyond natural recovery in some forests. This study... -
Can early thinning and pruning lessen the impact of pine plantations on beetle and ant diversity in the Patagonian steppe?
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: JC Corley --- Grupo de Ecología de Poblaciones de Insectos, Argentina JM Villacide --- Grupo de Ecología de Poblaciones de Insectos, Argentina M Vesterinen --- Grupo de Ecología de Poblaciones de Insectos, ArgentinaPine plantations are thought to negatively impact species diversity and to irreversibly modify arid zones. However, some studies have suggested that through the application of appropriate management practices, the negative impacts of plantations may be reduced. Our aim was to... -
Management of avian cholera Pasteurella multocida outbreaks on Dyer Island, South Africa, 2002–2005
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: LJ Waller LG UnderhillIn 2002 there was a widespread epizootic involving seabirds on five of the offshore islands of the Western Cape, South Africa. Since then, avian cholera Pasteurella multocida outbreaks have been occurring annually on one of these islands, Dyer Island. This... -
Non-random habitat use by coral reef fish recruits in Mafia Island Marine Park, Tanzania
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: KC Garpe MC ÖhmanThe habitat use by nearly 3 000 reef fish recruits, comprising 56 taxa, at seven sites in Mafia Island Marine Park, Tanzania, were examined. The study was carried out following the 1998 global coral bleaching event and all sites but... -
Seed dynamics of Themeda triandra in the montane grasslands of South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: TM Everson RI Yeaton CS EversonSeed production, viability, dispersal, predation and seed banks of Themeda triandra were determined to assess the potential of the seeds of this indigenous species in the re-establishment of degraded grassland. Annual seed production of T. triandra increased with length of... -
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... -
Integrative medicine and leaky gut syndrome
Item type: Journal Article • Journal: South African Family Practice • Authors: B Brom [AN0001]Leaky gut syndrome, also called increased intestinal permeability, is not a well-established diagnosis in general practice and yet is a well-recognised and common diagnosis within the community of integrative doctors. Perhaps this is because the integrative medical focus is not... -
Impact of cultivation method on productivity and botanical composition of a kikuyu–ryegrass pasture
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Pieter A Swanepoel --- Research and Technology Development Services, South Africa Philip R Botha --- Research and Technology Development Services, South Africa Hennie A Snyman --- Animal, Wildlife and Grassland Sciences, South Africa Chris C du Preez --- Soil, Crop and Climate Sciences, South AfricaKikuyu (Pennisetum clandestinum)–ryegrass (Lolium spp.) cultivated pastures form the base for dairy production in the southern Cape region of South Africa. The impact of various methods and implements used to over-sow ryegrass on the productivity and botanical composition of the... -
Response of endemic Clarias species’ life-history biometrics to land use around the papyrus-dominated Mpologoma riverine wetland, Uganda
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: GA Ssanyu --- Department of Biological Sciences, Uganda J Kipkemboi --- Department of Biological Sciences, Kenya JM Mathooko --- Global Research Akademik and Mentoring Services (GRAMS), Kenya J Balirwa --- Department of Fish Biology, UgandaThe Mpologoma River wetland is highly negatively impacted by rice growing and yet it provides habitat to endemic Clarias species that are important to the wetland fishery. Variations in life-history biometrics of small Clarias species at various wetland sites in... -
Physiological stress levels in the endemic and endangered Udzungwa red colobus vary with elevation
Item type: Journal Article • Journal: African Zoology • Authors: Claudia Barelli --- Sezione di Biodiversità Tropicale, MUSE – Museo delle Scienze, Italy Francesco Rovero --- Sezione di Biodiversità Tropicale, MUSE – Museo delle Scienze, Italy Keith Hodges --- Reproductive Biology Unit, German Primate Center, Germany Alessandro Araldi --- Reproductive Biology Unit, German Primate Center, Germany Michael Heistermann --- Endocrinology Laboratory, German Primate Centre, GermanyHabitat loss and fragmentation inevitably cause biodiversity decline, a major concern for the conservation of endangered species. Primates are of particular interest, because they are highly vulnerable to forest fragmentation. In this study, we investigated faecal glucocorticoid measurements (FGCM), an... -
Diversity, dispersal and disturbance: cladoceran species composition in the Okavango Delta
Item type: Journal Article • Journal: African Zoology • Authors: Markus Lindholm --- Norwegian Institute for Water Research/NIVA, Norway Dag O. Hessen --- Department of Biology, Norway Lars Ramberg --- Harry Oppenheimer Okavango Research Centre, University of Botswana, BotswanaCommunities exposed to intermediate disturbances have been shown to be more diverse than more stable or unstable systems. We recorded the diversity pattern of zooplankton in the Okavango Delta, Botswana, a system which include water bodies with different stability with... -
Invertebrates or iron: does large-scale opencast mining impact invertebrate diversity in ephemeral wetlands?
Item type: Journal Article • Journal: African Zoology • Authors: Falko T. Buschke --- Centre for Environmental Management (67), University of the Free State, South Africa Joan Adendorff --- Centre for Environmental Management (67), University of the Free State, South Africa Jaco Lamprechts --- Kolomela Iron Mine, South Africa Marie Watson --- Centre for Environmental Management (67), University of the Free State, South Africa Maitland T. Seaman --- Centre for Environmental Management (67), University of the Free State, South AfricaDisturbance has been offered as an explanatory mechanism in structuring the variation of species across a landscape. In this study, we investigated the effect of the impact by Kolomela Iron Mine on the variation of species occurring in temporary pans... -
Interspecific variation in the distribution of ungulates relative to human infrastructure surrounding Amboseli National Park
Item type: Journal Article • Journal: African Zoology • Authors: Marian Howe --- Department of Biology, Vassar College, U.S.A. Moses M. Okello --- The School for Field Studies, Center for Wildlife Management Studies, Kenya Jeremy M. Davis --- Department of Biology, Vassar College, U.S.A.The presence of humans and man-made structures may cause increased wariness in wildlife, causing displacement from traditional habitat ranges. Potential species differences in such responses could affect the composition of wildlife communities around human settlements. We examined the position of... -
Grassland bird response to vegetation structural heterogeneity and clearing of invasive bramble
Item type: Journal Article • Journal: African Zoology • Authors: Chevonne Reynolds --- School of Animal, Plant and Environmental Sciences, University of the Witwatersrand, South Africa Craig T. Symes --- School of Animal, Plant and Environmental Sciences, University of the Witwatersrand, South AfricaSpatial and temporal patterns of disturbance and the subsequent heterogeneity are critical in maintaining biodiversity within grassland ecosystems. Grassland birds have evolved within this ‘shifting mosaic’ to become reliant on specific habitat characteristics maintained under varying levels of both natural... -
Differential reactions to anthropogenic disturbance by two ground-nesting shorebirds
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Shirley Van de Voorde --- Van Hall Larenstein, The Netherlands Minke Witteveen --- Percy FitzPatrick Institute of African Ornithology, DST–NRF Centre of Excellence, South Africa Mark Brown --- School of Life Sciences, South AfricaMany ground-nesting shorebirds experience a high level of anthropogenic disturbance, often to the detriment of their breeding success. This study investigated the responses of the Near-Threatened African Black Oystercatcher Haematopus moquini (ABO) and the Least Concern Kelp Gull Larus dominicanus... -
A novel methodology for the rapid assessment of waterbird vulnerability to disturbance
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Kate JH England --- Percy FitzPatrick Institute of African Ornithology, DST–NRF Centre of Excellence, South Africa Colin Jackson --- A Rocha Kenya, Mwamba Bird Observatory and Field Study Centre, Kenya Philip AR Hockey --- Percy FitzPatrick Institute of African Ornithology, DST–NRF Centre of Excellence, South AfricaA methodology for rapidly assessing the vulnerability of waterbirds to disturbance was tested at Sabaki estuary, Kenya. Three variables were employed to measure the responses of 15 species: (1) bird density, (2) minimum distance of birds from a stationary disturbance... -
The realignment of international stock markets after the 1987 crash, with special reference to the Johannesburg Stock Exchange
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: G D I Barr --- Department of Statistical Science, L Sharp --- Department of Economics,This paper investigates stock price associations between the world’s sixteen largest international markets in the period immediately before and after the 1987 market crash, as well as in a more recent post-crash period. The analysis suggests that the crash had... -
Impact of marine inundation after a period of drought on the lakeshore vegetation of Lake St Lucia, South Africa: resilience of estuarine vegetation
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: EJJ Sieben --- Department of Plant Sciences, South Africa WN Ellery --- Department of Geography, South Africa BW Dullo --- Center for Energy and Environmental studies, The Netherlands AP Grootjans --- Center for Energy and Environmental studies, The NetherlandsThe shore of Lake St Lucia in the vicinity of Catalina Bay, in the southern part of the lake, receives freshwater input as surface and groundwater seepage from the adjacent elevated coastal plain. Vegetation, water quality and landform were recorded... -
Tanzania River Scoring System (TARISS): a macroinvertebrate-based biotic index for rapid bioassessment of rivers
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: LT Kaaya --- Department of Aquatic Sciences and Fisheries, Tanzania JA Day --- Department of Biological Sciences, South Africa HF Dallas --- Department of Botany, South AfricaThe biological assessment of rivers using aquatic macroinvertebrates is an internationally recognised approach for the determination of riverine ecological conditions. In this study a Tanzanian macroinvertebrate-based biotic method, Tanzania River Scoring System (TARISS), was developed in 2012, based on the... -
Enteropathogens associated with the seasonal fuctuations in plasma sodium and potassium levels in childhood diarrhoea
Item type: Journal Article • Journal: Southern African Journal of Epidemiology and Infection • Authors: V Pillay-van Wyk --- Burden of Disease Research Unit, G Swingler --- School of Child and Adolescent Health,This paper aims to assess the clinical, nutritional, microbiological, environmental and socio-economic determinants that have a seasonal distribution, or are potential confounders of a seasonal association of previously described seasonal fuctuations in plasma sodium and potassium concentrations in children with... -
Recovery of bird communities after selective logging and clear-cutting in Kibale National Park, Uganda
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Pirita Latja --- Department of Biology, Finland Geoffrey M Malinga --- Department of Biology, Finland Anu Valtonen --- Department of Biology, Finland Heikki Roininen --- Department of Biology, FinlandIn the face of the continuing destruction of tropical rainforests, a major challenge is to understand the consequences of these habitat changes for biodiversity and the time scale at which biodiversity can recover after such disturbances. In this study, we... -
Vegetation dynamics after experimental fire disturbance in the arid Succulent Karoo, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Helga van der Merwe --- South African Environmental Observation Network (SAEON): Arid Lands Node, South Africa Sebataolo Rahlao --- Invasives Monitoring and Reporting, South Africa Liesel Hein --- South African Environmental Observation Network, South Africa Suzanne J Milton --- South African Environmental Observation Network, South AfricaDisturbance by fire in the Succulent Karoo is rare but fire events could increase as a result of an increase in grassiness (alien and indigenous species). This study assessed the effects of fire eight years after an experimentally induced burn... -
Population estimates of the breeding birds of the Tinhosas islands (Gulf of Guinea), the only major seabird colony of the eastern tropical Atlantic
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Simon Valle --- Division of Biology and Conservation Ecology, School of Science and the Environment, UK Nuno Barros --- Portuguese Society for the Study of Birds, Marine Department, Portugal Iván Ramírez --- BirdLife International, Belgium Ross M Wanless --- Seabird Division, BirdLife South Africa, South AfricaThe Tinhosas islands, in São Tomé e Príncipe, host the most important seabird breeding colony in the Gulf of Guinea, but information on its conservation status was hitherto unpublished or anecdotal, the last assessment having been performed in 1997. A... -
The relative importance of climatic gradient versus human disturbance in determining population structure of Afzelia africana in the Republic of Benin
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Achille E Assogbadjo --- Laboratory of Applied Ecology, Faculty of Agronomic Sciences, Republic of Benin Sylvanus Mensah --- Laboratory of Biomathematics and Forest Estimations, Faculty of Agronomic Sciences, Republic of Benin Romain Glèlè Kakaï --- Laboratory of Biomathematics and Forest Estimations, Faculty of Agronomic Sciences, Republic of BeninThe study aimed to investigate the relative significance of effects of climatic variability and human disturbance on the population structure of the threatened species Afzelia africana Sm. ex Pers. in the Republic of Benin in West Africa. Forest inventory data... -
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... -
Possible rehabilitation methods of Galenia africana-dominated old lands in the Cederberg Mountains, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Nelmarie Saayman --- Directorate Plant Sciences, South Africa Clement Cupido --- Agricultural Research Council–Animal Production Institute, c/o Department of Biodiversity and Conservation Biology, South Africa Hannes Botha --- Western Cape Department of Agriculture, South Africa Rudi Swart --- Western Cape Department of Agriculture, South AfricaSeveral methods to rehabilitate old cropping lands in the Cederberg Mountains were tested to determine what type of soil disturbance, if any, and which of five indigenous perennial plant species are the most successful and economically feasible. Old lands are... -
Managing human disturbance: factors influencing flight-initiation distance of birds in a West African nature reserve
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Bukola Braimoh --- AP Leventis Ornithological Research Institute, University of Jos, Nigeria Soladoye Iwajomo --- Department of Zoology, Faculty of Science, Nigeria Mark Wilson --- British Trust for Ornithology, UK Adams Chaskda --- AP Leventis Ornithological Research Institute, University of Jos, Nigeria Afan Ajang --- AP Leventis Ornithological Research Institute, University of Jos, Nigeria Will Cresswell --- AP Leventis Ornithological Research Institute, University of Jos, NigeriaEscape behaviour in response to perceived predators can be employed as a guide when designating protected areas around sensitive bird species to minimise the impact of human disturbance. A key measure of escape response is flight-initiation distance (FID), the distance... -
Multiple disturbance patterns and population structure of a tropical tree species, Afzelia africana (Leguminosae–Caesalpinioideae), in two contrasting bioclimatic zones of the Republic of Benin
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Ogoudje I Amahowe --- Laboratoire d’Ecologie, de Botanique et de Biologie végétale, Faculté d’Agronomie, République du Bénin Samadori SH Biaou --- Laboratoire d’Ecologie, de Botanique et de Biologie végétale, Faculté d’Agronomie, République du Bénin Armand K Natta --- Laboratoire d’Ecologie, de Botanique et de Biologie végétale, Faculté d’Agronomie, République du Bénin Rodrigue O Balagueman --- Laboratoire d’Ecologie, de Botanique et de Biologie végétale, Faculté d’Agronomie, République du BéninUnderstanding how multiple disturbances affect species population structure is crucial for designing a better conservation strategy of threatened species. In this paper, we assessed the disturbance patterns and evaluated their effects on the population structure of Afzelia africana, in two... -
Habitat utilisation and nesting behaviour of two sympatric weavers in Mbalmayo District, Cameroon
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Abubakari Said Mgelwa --- College of Life Sciences, China Abadi Mehari Abrha --- Department of Wildlife and Ecotourism Management, Ethiopia Zabibu Kabalika --- College of Natural Resources Management and Tourism, Tanzania Simon Awafor Tamungang --- Laboratory of Applied Ecology and Biology, Department of Animal Biology, Cameroon Amare Gebre Medhin Nigusse --- Institute of Geo-Information and Earth Observation Sciences, Department of Geo-Information and Earth Observation Sciences for Natural Resource Management, EthiopiaAvian ecology and behaviour data provides crucial information for bird conservation and management, but are still missing for many species, particularly in developing countries. This study examines habitat utilisation, nesting behaviour, anthropogenic disturbances and impacts on agricultural crops of Village... -
Land-use impacts on the composition and diversity of the Baikiaea– Guibourtia–Pterocarpus woodlands of north-western Zimbabwe
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Angella Chichinye --- Department of Forest Resources and Wildlife Management, Zimbabwe Coert J Geldenhuys --- Department of Plant and Soil Sciences, South Africa Paxie W Chirwa --- Department of Plant and Soil Sciences, South AfricaVariation in floristic composition of recovering Baikiaea–Guibourtia–Pterocarpus woodlands was studied in different development stages (from early regrowth to mature woodland) under different land-use systems (protected areas, timber harvesting, pole and firewood collection, and abandoned crop fields), in the Gwayi and... -
Testing of the applicability of European diatom indices in the tropical rift valley lake, Lake Hawassa, in Ethiopia
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: T Wondmagegn --- Department of Animal Science, Ethiopia S Mengistou --- Department of Zoological Science, Ethiopia PA Barker --- Environment Centre, United KingdomQuantitative ecological monitoring of African lakes is needed to understand growing human pressures on ecosystems. Diatom-based indices are routinely used for this purpose elsewhere in the world, but have not yet been produced for the flora of African freshwater lakes... -
A comparison of aquatic macroinvertebrate and large branchiopod community composition between temporary pans of a conservation area and surrounding communal area in South Africa
Item type: Journal Article • Journal: African Zoology • Authors: T Dube --- Animal Ecology, Global Change and Sustainable Development, Belgium L de Necker --- Water Research Group, School for Biological Sciences, South Africa V Wepener --- Water Research Group, School for Biological Sciences, South Africa NJ Smit --- Water Research Group, School for Biological Sciences, South Africa T Pinceel --- Animal Ecology, Global Change and Sustainable Development, Belgium GN Mwaijengo --- Animal Ecology, Global Change and Sustainable Development, Belgium P Lemmens --- Laboratory of Aquatic Ecology, Evolution and Conservation, Belgium L Brendonck --- Animal Ecology, Global Change and Sustainable Development, BelgiumAlthough temporary wetlands are often biodiversity hotspots that deliver multiple ecosystem services, they are also threatened by human exploitation. We conducted a comparative field study to investigate the impact of reserve protection on the diversity and community structure of aquatic... -
Prevalence of anxiety-induced sleep disturbance and associated factors among a national sample of in-school adolescents in Benin
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Supa Pengpid --- , Thailand Karl Peltzer --- , South AfricaThe goal of the study was to estimate the prevalence and correlates of anxiety-induced sleep disturbance (AISD) among adolescent school children in Benin. Nationally representative cross-sectional data were analysed from 2 536 adolescents (median age = 17 years) that participated... -
Practicing psychologists’ understanding of the athletic-body ideal internalisation: Implications for classification and treatment
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Lindi Williams --- , South Africa Del Naidoo --- , South Africa Ruan Spies --- , South AfricaThis study explored how practicing psychologists make sense of the athletic-body ideal when internalised by their clients. Utilising a grounded theory approach, we interviewed a purposive sample of nine psychologists to explore their understanding of the athletic-body ideal, with a... -
Diversity of macrophytes in relation to environmental conditions in wetlands along the lower part of the Gilgel Abay River catchment in Ethiopia
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Habtamu Getnet --- , Ethiopia Seyoum Mengistou --- , Ethiopia Bikila Warkineh --- , EthiopiaThe environmental conditions in wetlands affect the diversity, composition, and distribution of their macrophyte communities. This study investigated the diversity of macrophytes as related to environmental conditions in wetlands of the lower part of Gilgel Abay River catchment in Ethiopia... -
A history of Conservation Agriculture in South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: JA Strauss --- , South Africa PA Swanepoel --- , South Africa H Smith --- , South Africa EH Smit --- , South AfricaConservation Agriculture (CA) is a holistic farming system aimed at the conservation of natural resources by halting soil erosion and increasing biodiversity in cropping systems, while still effecting sustainable production. Conservation agriculture is based on three principles, namely minimum soil... -
Local variations in the response of birds to human presence in urban areas
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Tristan Nyatanga --- , Zimbabwe Henry Ndaimani --- , South Africa Tanyaradzwa Gaza --- , ZimbabweStudies that seek to understand the local variations in the response of birds to human disturbance in urban areas are important for conservation. This article investigated the contribution of human population density in the different urban land use zones of... -
Disturbance impacts on the persistence niche of key species in the Baikiaea–Guibourtia–Pterocarpus woodlands of north-western Zimbabwe
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: A Chichinye --- , Zimbabwe CJ Geldenhuys --- , South Africa PW Chirwa --- , South AfricaThe persistence niche (studied through different modes regeneration) of three key species (Baikiaea plurijuga (Harms), Guibourtia coleosperma (Benth.) J. Leonard and Pterocarpus angolensis) (DC) under five different disturbance regimes (eight years after cessation of disturbance) was studied in the Baikiaea–Guibourtia–Pterocarpus... -
Fire and herbivory shape belowground bud banks in a semi-arid African savanna
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: AB Bombo --- , Brazil F Siebert --- , South Africa A Fidelis --- , BrazilFire and herbivory are major drivers in tropical savanna ecosystems and they selected a flora composed of species able to cope with recurrent aboveground biomass removal. Renewal of the herbaceous stratum is made possible by resprouting, mostly through a belowground... -
Macroinvertebrate community structure and diversity in relation to environmental factors in wetlands of the lower Gilgel Abay River catchment, Ethiopia
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Habtamu Getnet --- , Ethiopia Seyoum Mengistou --- , Ethiopia Bikila Warkineh --- , EthiopiaThe influence of environmental factors on the diversity of macroinvertebrates was studied in the wetlands of the Gilgel Abay River (GAR) catchment in Ethiopia. The study was done between September 2017 and March 2018, encompassing both wet and dry seasons... -
Impact of climate and management on radial growth dynamics of two coexisting Mediterranean Quercus species in south Albania
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Edmond Pasho --- , Albania Arben Q Alla --- , AlbaniaIn the context of changing climate conditions, it is crucial to understand how trees maintain resistance and resilience to and recover from drought stress and management-related disturbances, and how management (intensive/extensive) modulates tree growth responses to climate. Dendrochronological methods were... -
Ecological quality of the Alibori River, northern Benin, using macroinvertebrate indicators
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: TM Agblonon Houelome --- , Benin TP Agbohessi --- , Benin D Adandedjan --- , Benin R Nechifor --- , Romania A Chikou --- , Benin IM Lazar --- , Romania P Laleye --- , BeninThe Alibori River, which flows through Benin’s cotton crop regions, receives surface water from much of the cultivated land that is situated along its banks. Chemical pollution in surface runoff from this land use threatens the ecological quality of the... -
The effect of anthropogenic habitat modification on habitat use by Afrana angolensis along the dodwe river, Tanzania
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: ScottG. Lynn --- University of Kentucky, USA Christian Lindle --- University of Vienna, Austria -
A tree-level analysis of baboon damage in commercial forest stands using deep learning techniques
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Regardt Ferreira --- Nelson Mandela University, South Africa Kabir Peerbhay --- , South Africa Josua Louw --- Nelson Mandela University, South Africa Ilaria Germishuizen --- Institute for Commercial Forestry Research, South Africa Andrew Morris --- Institute for Commercial Forestry Research, South Africa Romano Lottering --- University of KwaZulu-Natal, South AfricaCommercial forest plantations in South Africa are homogeneous monocultures of highly bred exotic species grown to deliver timber products of the best potential quality. As such, these stands are susceptible to adverse effects of biotic and abiotic factors, and therefore... -
Tree diversity, vegetation structure and management of mangrove systems on Viti Levu, Fiji Islands
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Ashik Rubaiyat --- University of Göttingen, Germany Nicholas Rollings --- The University of the South Pacific, Fiji Islands Stephen Galvin --- The University of the South Pacific, Fiji Islands Ralph Mitloehner --- University of Göttingen, Germany Sohag Miah --- University of Göttingen, Germany Hans Juergen Boehmer --- The University of the South Pacific, Fiji IslandsMangrove forest ecosystems are critical natural resources, particularly in the South Pacific region. Mangrove forests in Viti Levu, Fiji’s main island, are threatened by infrastructure development activities and population growth. Consequently, the protection and restoration of mangrove forest are of... -
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,... -
Clinical characteristics of endocrine disturbances in post-COVID-19 condition, case report with review of literature
Item type: Journal Article • Journal: Journal of Endocrinology, Metabolism and Diabetes of South Africa • Authors: W. Ji --- The Second Clinical Medical College of Ningxia Medical University, People's Republic of China XM. Xie --- The Second Clinical Medical College of Ningxia Medical University, People's Republic of China L. Zhang --- The Second Clinical Medical College of Ningxia Medical University, People's Republic of China HY. Zhou --- The Second Clinical Medical College of Ningxia Medical University, People's Republic of China GR. Bai --- The Second Clinical Medical College of Ningxia Medical University, People's Republic of China L. Li --- The Second Clinical Medical College of Ningxia Medical University, People's Republic of China YT. He --- The Second Clinical Medical College of Ningxia Medical University, People's Republic of China J. He --- The Second Clinical Medical College of Ningxia Medical University, People's Republic of China CY. Xia --- The Second Clinical Medical College of Ningxia Medical University, People's Republic of China H. Li --- The Second Clinical Medical College of Ningxia Medical University, People's Republic of China RD. Li --- The Second Clinical Medical College of Ningxia Medical University, People's Republic of China R. Ping --- The Second Clinical Medical College of Ningxia Medical University, People's Republic of China D. Qiang --- The Second Clinical Medical College of Ningxia Medical University, People's Republic of ChinaPost-COVID-19 condition (PCC) is frequently associated with multiple endocrine hormone disturbances, primarily involving the hypothalamic–pituitary–adrenal axis. However, the exact cause remains unclear, particularly concerning whether these symptoms result from hypothalamus damage. This study reports on the clinical characteristics and examination... -
A preliminary macroinvertebrate index of biotic integrity (M-IBI) for monitoring the highland flood plain wetland ecosystems in Ethiopia
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Habtamu Getnet Fetene --- Asossa University, Ethiopia Seyoum Mengistou --- Addis Ababa University, Ethiopia Bikila Warkineh Dullo --- Addis Ababa University, EthiopiaAnthropogenic activities have put tremendous pressure on the natural condition of wetlands. However, few studies have used indices based on benthic invertebrates to assess the effect of these pressures on wetland ecosystems. Multi-metric indices (MMIs) have been used successfully to... -
Overlooked forbs: implications for rangeland biodiversity and function in southern Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Sindiso Nkuna --- University of KwaZulu-Natal, South Africa Craig Morris --- University of KwaZulu-Natal, South AfricaForbs are a diverse component of grassy ecosystems, offering various vital ecosystem services while enhancing system resilience. However, herbaceous non-grass species are not routinely enumerated, nor their significance evaluated. We examined the extent to which grassland forbs have been considered... -
The number of human-simulated predators influences the escape behaviour of bird species in a West African protected area
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Ngozi M Okafor --- AP Leventis Ornithological Research Institute, Nigeria Soladoye B Iwajomo --- University of Lagos, Nigeria Bukola DA Azaki --- University of Cape Town, South Africa Manu A Shiiwua --- AP Leventis Ornithological Research Institute, NigeriaContinuous human presence in protected and recreational areas can adversely affect wildlife. Birds perceive the approach by humans as predatory and mostly flee in response, which can be energetically costly, and leads to disruption of foraging activities and interactions with... -
Dung and carrion beetle diversity in small forest patches versus large continuous forest in the southern Cape, South Africa
Item type: Journal Article • Journal: African Zoology • Authors: Graham van Bergen --- Nelson Mandela University, South Africa Anina Coetzee --- Nelson Mandela University, South Africa Jan A Venter --- Nelson Mandela University, South Africa Francois Roets --- Stellenbosch University, South Africa Rudi C Swart --- Nelson Mandela University, South AfricaNaturally fragmented indigenous forests in the southern Cape of South Africa are particularly understudied in terms of beetle diversity. This study therefore aimed to determine whether southern Afrotemperate forest dung and carrion beetle diversity differs between continuous forest and naturally... -
Prevalence of and factors associated with loneliness, anxiety-induced sleep disturbance, and suicidal ideation among school-going adolescents in Panama
Item type: Journal Article • Journal: Journal of Child & Adolescent Mental Health • Authors: Ishrar Tahmin Anika --- Institute of Disaster Management and Vulnerability Studies, University of Dhaka, Bangladesh Habiba Islam --- Institute of Disaster Management and Vulnerability Studies, University of Dhaka, Bangladesh Khalid Hasan --- Institute of Disaster Management and Vulnerability Studies, University of Dhaka, BangladeshBackground: In recent years, mental health issues among adolescents have gained significant attention. Like many other nations, Panama is experiencing a growing prevalence of these challenges within its youth. It is crucial to investigate the prevalence of, and the underlying... -
Seventy-five years of insight – the impact of the Ukulinga very long-term grassland experiments
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Craig D Morris --- Agricultural Research Council – Animal Production Institute (ARC-API), South Africa Kevin P Kirkman --- University of KwaZulu-Natal, South AfricaTwo of the world’s oldest grassland experiments began in 1950/51 in Pietermaritzburg, South Africa. The Burning and Mowing Trial (BMT) tests how summer mowing and dormant-season burning or mowing regimes affect mesic grassland. The Veld Fertiliser Trial (VFT) examines how...