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Reductions in Plant Species Richness under Stands of Alien Trees and Shrubs in the Fynbos Biome
Item type: Journal Article • Journal: South African Forestry Journal • Authors: D.M. Richardson --- Jonkershoek Forestry Research Centre, I. A.W. Macdonald --- , G.G. Forsyth --- Jonkershoek Forestry Research Centre,The reduction of species richness of indigenous plants is one of the major problems associated with the presence of dense stands of invasive alien trees and shrubs in the Fynbos Biome of the Cape Province, South Africa. A synthesis was... -
Are Pine Plantations “Inhospitable Seas” around Remnant Native Habitat within South-western Cape Forestry Areas?
Item type: Journal Article • Journal: South African Forestry Journal • Authors: A.J. Armstrong --- Department of Nature Conservation, South Africa H.J. van Hensbergen --- Department of Nature Conservation, South Africa D.F. Scott --- Jonkershoek Forestry Research Centre, South Africa S.J. Milton --- , South AfricaSome areas of forestry estates, including unplantable ones, may be zoned and managed for nature conservation. This paper is an analysis of the results of studies of plants, birds and small mammals at Jonkershoek, Stellenbosch, to determine whether pine plantations... -
Plant palatability assessment and its implications for plant‐herbivore relations
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: N. Owen‐Smith --- Resource Ecology Group, Department of Zoology, S.M. Cooper --- Resource Ecology Group, Department of Zoology,An objective method used to assess the palatability of the foliage of woody plant species to kudus, impalas and goats is described. Observations were made on the feeding behaviour of tame animals in the Nylslvey Nature Reserve in northern Transvaal... -
A preliminary account of growth characteristics and seed germination of Cassia mimosoides L. in Dohne Sourveld
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: T.D. Steinke --- Department of Botany, Republic of South Africa L.O. Nel --- Department of Agriculture (Eastern Cape Region), Republic of South AfricaAn autecological study of Cassia mimosoides L., which invades mismanaged Dohne Sourveld, was initiated at the Agricultural Research Institute, Dohne. A study of the growth characteristics revealed that the nature of the root distribution enabled the plant to take up... -
Costing the initial clearance of alien Acacia species invading fynbos vegetation
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: I. A.W. Macdonald --- , Republic of South Africa C. Wissel --- , Federal Republic of GermanyThe costs of the initial clearing of mixed stands of the alien Acacia cyclops and A. saligna invading fynbos vegetation were compared in a replicated trial on the Pella Fynbos Research Site. Costs were estimated using a regression-based model of... -
Host plant preference by the maize stalk borer, Busseola fusca (Fuller) (Lepidoptera: Noctuidae)
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J. B.J. van Rensburg --- Summer Grain Centre, Republic of South Africa J. van den Berg --- Summer Grain Centre, Republic of South AfricaSome graminaceous fodder crops were compared to maize and grain sorghum for ovipositional preference by Busseola fusca (Fuller) under laboratory conditions. The infestation potential of different crops was increased by the incidence of tillering, infestation being enhanced by the availability... -
Effect of temperature on the growth of Lachenalia cv. Ronina during the bulb preparation phase
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: E.S. du Toit --- Department of Plant Production and Soil Science, Faculty of Natural and Agricultural Sciences, Republic of South Africa P.J. Robbertse --- Department of Plant Production and Soil Science, Faculty of Natural and Agricultural Sciences, Republic of South Africa J.G. Niederwieser --- , Republic of South AfricaLachenalia cultivars have excellent characteristics as flowering pot plants. The effect of three temperature regimes on the growth of small bulbs of Lachenalia cv. Ronina to flowering size (± 7 g) was studied. Potted bulbs were grown in three temperature... -
Pine litter as substrate for propagation of vegetable transplants in trays
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: N.S. Mphaphuli --- Centre of Organic and Smallholder Agriculture, Department of Crop Sciences, South Africa W. van Averbeke --- Centre of Organic and Smallholder Agriculture, Department of Crop Sciences, South Africa R. Böhringer --- Centre of Organic and Smallholder Agriculture, Department of Crop Sciences, South AfricaThe study evaluates the potential of pine litter for use as a substrate in the propagation of vegetable transplants in trays. Sub-optimum pH and electrical conductivity of pine litter were addressed by incorporating 10% feedlot manure by volume. The water... -
Maize–planting date interaction and effect of Bt maize on European corn borer (Ostrinia nubilalis (Hubner) (Coleoptera: Crambidae) damage
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M Obopile --- Department of Entomology, Ohio Agricultural Research and Development Center, USA RB Hammond --- Department of Entomology, Ohio Agricultural Research and Development Center, USA PR Thomison --- Department of Horticulture and Crop Science, USAA study was conducted to determine the influence of planting date and transgenic maize on maize yield following stalk injury by European corn borer, Ostrinia nubilalis (Hubner). Transgenic and non-transgenic maize hybrids with short- and full-season maturity were planted in... -
Diet selection of goats in the communally grazed Richtersveld National Park
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: HH Hendricks PA Novellie WJ Bond JJ MidgleyThe study provided an account of the diet selection of goats within the Richtersveld National Park and focused on (a) diet composition, (b) plant growth-forms, (c) principal and preferred food plants. The conservation status of these food plants was also... -
Plant invaders, global change and landscape restoration
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: DA Pyke ST KnickModifications in land uses, technology, transportation and biogeochemical cycles currently influence the spread of organisms by reducing the barriers that once restricted their movements. We provide an overview of the spatial and temporal extent for agents of environmental change (land... -
A contiguous-quadrat sampling exercise in a shrub-invaded grassland patch: size matters but biggest is not best
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: J Goodall P Zacharias T Olckers T EdwardsWe attempted to ascertain the most effective sample size for monitoring serial changes in the herbaceous layer of fragmented and neglected grasslands that are responding to annual veld burning. We conducted a sampling exercise in a coastal grassland invaded by... -
Impact of Prosopis (mesquite) invasion and clearing on the grazing capacity of semiarid Nama Karoo rangeland, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: T Ndhlovu --- Department of Conservation Ecology and Entomology, South Africa SJ Milton-Dean --- DST/NRF Centre of Excellence at the Percy FitzPatrick Institute of African Ornithology, South Africa KJ Esler --- Department of Conservation Ecology and Entomology, South AfricaWe assessed the impact of Prosopis invasion and clearing on the grazing capacity of heavily grazed Nama Karoo rangeland in the Beaufort West district of the Western Cape province of South Africa. Invasion (c. 15% Prosopis canopy cover) reduced grazing... -
Host plants of Osyris lanceolata (African Sandalwood) and their influence on its early growth performance in Tanzania
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: P.L. Mwang'ingo Z. Teklehaimanot L.L. Lulandala S.T. MwihomekeIdentification of the host plants of the hemi-parasitic African sandalwood (Osyris lanceolata) and the influence of some on its early growth performance was investigated at Image, Nundu, Sao Hill and Iringa in the southern highlands of Tanzania. The aim was... -
The significance of gathering wild orchid tubers for orphan household livelihoods in a context of HIV/AIDS in Tanzania
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: JoyceFX Challe --- Department of Research and Training, Mikocheni Agricultural Institute, Tanzania Anke Niehof --- Sociology of Consumers and Households Group, The Netherlands PaulC Struik --- Centre for Crop System Analysis, The NetherlandsWe investigated the role of gathering and selling the edible tubers of wild orchids by children orphaned by AIDS as one of their livelihood strategies, through a household survey administered to 152 households in three villages in the Southern Highlands... -
Changes in the distribution of emergent aquatic plants in a brackish South African estuarine-lake system
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: IA RussellVegetation mapping in the Wilderness Lakes indicated that, between 1975 and 1997, prominent increases occurred in the distribution of the mapping units Phragmites australis (53.9ha; +53%), grass or fields (23.1ha; +35%) and scrub or trees (12.2ha; +45%). Over the same... -
A laboratory assessment of the potential molluscicidal activity of some Nigerian plant species used as anthelmintics
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: AA Adenusi --- Parasitology Unit, Department of Plant Science and Applied Zoology, Nigeria AB Odaibo --- Department of Zoology, NigeriaLaboratory studies were conducted to determine the potential molluscicidal activity of five Nigerian plant species used in alternative medicine practice as anthelmintics. Laboratory-bred adult Biomphalaria pfeifferi, the snail host of Schistosoma mansoni in Nigeria, and their viable 0- to 24-hour-old... -
Body-size distribution, biomass estimates and life histories of common insect taxa associated with a submerged macrophyte Lagarosiphon ilicifolius in the Sanyati Basin, Lake Kariba, Zimbabwe
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: C Phiri --- , Zimbabwe A Chakona --- Department of Ichthyology and Fisheries Science, South Africa JA Day --- Freshwater Research Unit, Zoology Department, South AfricaThe body-size distributions and biomass estimates of Caenis (Ephemeroptera: Caenidae), Cloeon (Ephemeroptera: Baetidae), Coenagrionidae (Odonata), Micronecta (Hemiptera: Corixidae), Chironominae (Diptera: Chironomidae) and Orthocladiinae (Diptera: Chironomidae), the most common and abundant insect taxa associated with a submerged macrophyte Lagarosiphon ilicifolius in... -
The Distribution and Spread of Alien Vascular Plants on Prince Edward Island
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: P. G. Ryan V. R. Smith N. J. M. GremmenSurveys of alien plants at subantarctic Prince Edward Island in 2001 show that the ranges of all three introduced species have increased since the last survey in 1998. Poa annua, the longest-established species, increased its range substantially after 1987, prior... -
Effect of an impoundment on nutrient dynamics in the Kihansi River, Tanzania
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: RJ Ideva J Machiwa F Schiemer T HeinThe impact of the Kihansi Dam on electrical conductivity, pH, temperature and dissolved oxygen in the Kihansi River was assessed in 2005 after 85% of the original river flow had been diverted to the Lower Kihansi power plant. The results... -
First tracking of white stumpnose Rhabdosargus globiceps (Sparidae) in a South African marine protected area
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: CG Attwood PD Cowley SE Kerwath TF Naesje F Økland EB ThorstadThere is a growing recreational fishery for white stumpnose Rhabdosargus globiceps (Sparidae) in Langebaan Lagoon, part of South Africa's West Coast National Park. The upper reaches of the lagoon are protected from fishing, but the extent to which the closure... -
A survey of plants sold by traders at Zululand muthi markets, with a view to selecting popular plant species for propagation in communal gardens
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: BG Ndawonde AM Zobolo ET Dlamini SJ SiebertA survey of medicinal plants sold at muthi markets of northern KwaZulu-Natal in South Africa was conducted by questioning 63 plant traders to identify unthreatened and threatened plants for cultivation purposes. From a total of 163 plants sold at local... -
Assessing local scale impacts of Opuntia stricta (Cactaceae) invasion on beetle and spider diversity in Kruger National Park, South Africa
Item type: Journal Article • Journal: African Zoology • Authors: M.P. Robertson --- Centre for Invasion Biology, Department of Zoology and Entomology, South Africa K.R. Harris --- Centre for Invasion Biology, Department of Zoology and Entomology, South Africa J.A. Coetzee --- Department of Zoology and Entomology, South Africa L.C. Foxcroft --- Conservation Services, South African National Parks, South Africa A.S. Dippenaar-Schoeman --- Plant Protection Research Institute, Agricultural Research Council, South Africa B.J. van Rensburg --- Centre for Invasion Biology, Department of Zoology and Entomology, South AfricaThere is a paucity of studies examining direct impacts of introduced alien species on biodiversity, a key need for motivating for alien species control in conservation areas. The introduced prickly pear (Opuntia stricta) has invaded some 35 000 ha of... -
A preliminary study of South African consumers’ knowledge of and their attitudes towards using indigenous ornamentals in horticultural applications
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Lorraine Middleton --- Department of Biology, South AfricaCrucial aspects related to the knowledge levels and attitudes of South African consumers in the formal commercial sector regarding the horticultural uses of ornamental plants in general, and indigenous plants in particular, were evaluated. The findings showed that consumer behaviour... -
Prospects for extirpating small populations of the wetland invader Melaleuca quinquenervia from South Africa: a case study from the Western Cape region
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: E van Wyk --- Invasive Species Programme, South Africa LEO Jacobs --- Invasive Species Programme, South AfricaThe broad-leaved paper bark tree Melaleuca quinquenervia is a major invader in the wetlands of the Florida Everglades, USA. In South Africa, this introduced species is known from eight locality records and is naturalising at two of these sites. The... -
Title: between N!a†xam and tibi. A case study of tuberculosis and the Ju/'hoansi in the Tsumkwe region, Namibia
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Diana Gibson --- Department of Anthropology and Sociology, Estelle Oosthuysen --- , NamibiaIn academic literature and the media, knowledge of the Ju/'hoansi San of Namibia is often either valorised or problematised. In this case study of tuberculosis in a small village in Tsumkwe district, which we call Dune and Low Dune, all... -
South African consumers’ selection criteria for ornamental plants: a market perspective
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Lorraine Middleton --- Department of Biology, South AfricaThe considerations of South African consumers in the ornamental plant sector can be interpreted as selection criteria and be used as a marketing tool to increase the use of indigenous plants for ornamental purposes locally. A countrywide survey was undertaken... -
Determinants of the occurrence of a native encroacher species, Pechuelloeschea leubnitziae (wild sage), in the eastern Okavango Delta, Botswana
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Michelle J Tedder --- Grassland Science, School of Life Sciences, South Africa Kevin P Kirkman --- Grassland Science, School of Life Sciences, South Africa Craig D Morris --- Agricultural Research Council, c/o School of Life Sciences, South Africa Winston SW Trollope --- Research and Development, South Africa Mpaphi C Bonyongo --- Okavango Research Institute, BotswanaAlthough indigenous to southern Africa, Pechuel-loeschea leubnitziae is considered a problematic weed as it forms dense monotypic stands in the grasslands and woodlands of the Okavango Delta, Botswana, and is associated with veld degradation and a dominance of shade-tolerant, poor-quality... -
Using synergistic exogenous phytohormones to enhance somatic embryogenesis from leaf explants of a Eucalyptus grandis clone
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Muhammad Nakhooda --- Department of Biotechnology and Consumer Sciences, South Africa Eshani Mandiri --- School of Life Sciences, South AfricaSomatic embryogenesis (SE) in Eucalyptus spp. has been limited to germinated seeds, flowers, lignotubers or zygotic embryos. The low yield of somatic embryos from leaf explants has hampered progress, even though leaves offer a more viable source of clonal explants... -
Effect of Prosopis (mesquite) invasion and clearing on vegetation cover in semi-arid Nama Karoo rangeland, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Thabisisani Ndhlovu --- Department of Conservation Ecology and Entomology, South Africa Suzanne J Milton --- Percy FitzPatrick Institute of African Ornithology, DST–NRF Centre of Excellence, South Africa Karen J Esler --- Centre for Invasion Biology and Department of Conservation Ecology and Entomology, South AfricaThe Nama-Karoo is the largest of the three biomes that comprise the semi-arid Karoo-Namib ecoregion of southern Africa. Large tracts of Nama-Karoo rangeland have been invaded by alien leguminous trees of the genus Prosopis. We assessed the impact of Prosopis... -
Impact of Prosopis (mesquite) invasion and clearing on vegetation species composition and diversity in semi-arid Nama-Karoo rangeland, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Thabisisani Ndhlovu --- Department of Conservation Ecology and Entomology, South Africa Suzanne J Milton --- DST/NRF Centre of Excellence at the Percy FitzPatrick Institute of African Ornithology, South Africa Karen J Esler --- Centre for Invasion Biology and Department of Conservation Ecology and Entomology, South AfricaThe Nama-Karoo biome occupies 28% of South Africa’s land area. Alien leguminous trees of the genus Prosopis have invaded large tracts of Nama-Karoo rangeland. We evaluated the impact of Prosopis invasion and clearing on vegetation species composition and diversity (alien... -
Exploring the invasion of rangelands by Acacia mearnsii (black wattle): biophysical characteristics and management implications
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Onalenna Gwate --- Institute for Water Research, Rhodes University, South Africa Sukhmani K Mantel --- Institute for Water Research, Rhodes University, South Africa Andiswa Finca --- Agricultural Research Council – Animal Production Institute, South Africa Lesley A Gibson --- Department of Construction and Surveying, UK Zahn Munch --- Department of Geography and Environmental Studies, South Africa Anthony R Palmer --- Institute for Water Research, Rhodes University, South AfricaAustralian acacias have spread to many parts of the world. In South Africa, species such as A. mearnsii and dealbata are invasive. Consequently, more effort has focused on their clearing. In a context of increasing clearing costs, it is crucial... -
Rethinking medicinal plants and plant medicines
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Diana Gibson --- Department of Anthropology and Sociology, South AfricaBecause plants are perceived as sessile and immobile, they are often represented as objects or things in current literature. In this paper, I explore variations and shifts in research and literature since 2000 that reconsider the ways that plant-related ideas,... -
Macro and trace elements of 26 browse species growing in semi-arid grazing lands of Eastern Cape, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Solomon Tefera --- Department of Animal Science, Namibia Victor Mlambo --- Department of Animal Sciences, South AfricaLeaves and twigs from woody plants provide essential nutrients to range animals. We examined variation in the mineral status of 26 woody species, and the influence of harvesting height as well as the interactions of the main effects on minerals... -
“Being attentive”: exploring other-than-human agency in medicinal plants through everyday Rastafari plant practices
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Tihana Nathen --- Department of Anthropology and Sociology, South AfricaThe focus is on everyday practices and relations between local medicinal plants, Rastafari bossiesdokters [bush doctors] and kruiemanne [herbalists] of the Matzikama Local Municipality, which lies in the far north-west of the Western Cape Province. Inspired by the work of... -
Towards plant-centred methodologies in anthropology
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Diana Gibson --- Department of Anthropology and Sociology, South AfricaThis paper reflects on research on medicinal plants in the Matzikama Local Municipality, Western Cape, in order to elaborate on methodological possibilities and their problematic in such studies. Classical ethnographic research is usually conducted from an anthropocentric viewpoint, but our... -
Technological advancement and modes of existence in medicinal plant research
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Josh B. Cohen --- Anthropology Section, School of African and Gender Studies, Anthropology and Linguistics, South AfricaThis paper examines the practices and knowledge of kruiedokters [herb doctors] and a phytochemist engaging with healing properties of plants found in Namaqualand, Northern Cape Province. Technological and theoretical advancements in the natural and social sciences toward more holistic or... -
“Doing” diabetes: the unobtrusive presence of plants
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Hameedah Parker --- Department of Anthropology and Sociology, South AfricaThis article investigates the “knowing” and “doing” (through a material semiotic approach) of diabetes. Practices of treatment and healing give insight into how this chronic medical condition is “done” in clinics and in homes, by clinic staff and patients in... -
“Ons is die stam van die gemeenskap”: rethinking old age and vitality in Nuwerus, Western Cape
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Michellé Pasquallie --- Department of Anthropology and Sociology, South AfricaIn this paper, I argue against contemporary South African representations of the elderly as people at the fringes of society, as frail, withdrawn from social activity or “invisible.” Drawing on ethnographic fieldwork carried out in Nuwerus, in the Matzikama Local... -
Human and plant interfaces: relationality, knowledge and practices
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Diana Gibson --- Department of Anthropology and Sociology, South Africa William Ellis --- Department of Anthropology and Sociology, South AfricaThis introduction to the special issue on “Human-Plant Interfaces: Relationality, Knowledge and Practices” briefly makes a case for the ethnography of the human-plant interface by referring to three interrelated aspects that emerge from the set of papers that follow. These... -
Therapeutic powers of medicinal plants used by traditional healers in Kavango, Namibia, for mental illness
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Michael Murundu Shirungu --- Academic Affairs, Namibia Ahmad Cheikhyoussef --- Multidisciplinary Research Centre, Science and Technology Division, NamibiaThis paper examines the position, usage and healing power of medicinal plants in the treatment of mental illness in two regions in the Kavango, Namibia. It focuses in particular on three common, locally identified mental disorders, namely nyambi, kasenge, and... -
A comparative study of selected multi-criteria decision-making methodologies for location selection of very large concentrated solar power plants in Nigeria
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Olayinka S. Ohunakin --- The Energy and Environment Research Group (TEERG), Mechanical Engineering Department, Nigeria Burak Omer Saracoglu --- Orhantepe Mahallesi, Tekel Caddesi, Istanbul, TurkeyThis work studies the location selection of very large concentrated solar power plants (VLCSPPs) in Nigeria using five Multi-Criteria Decision Making (MCDM) methodologies including: Analytic Hierarchy Process (AHP), Consistency-Driven Pairwise Comparisons (CDPC), Decision Expert for Education (DEXi), Elimination and Choice... -
Acute toxicity and adverse effects of aqueous and ethanol extracts of Parkia biglobosa pods on biochemical parameters of Clarias gariepinus
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: KA Bawa-Allah --- Environmental Toxicology Unit, Department of Zoology, Nigeria BO Akinnuoye --- Environmental Toxicology Unit, Department of Zoology, NigeriaThe acute toxicity of the aqueous and ethanol extracts of Parkia biglobosa pods against Clarias gariepinus was investigated under laboratory conditions. Agitated behaviours and respiratory distress were also observed during the exposure period. The adverse effects on biochemical parameters were... -
Remote sensing of forest health and vitality: a South African perspective
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Sifiso Xulu --- School of Agricultural, Earth and Environmental Sciences, South Africa Michael T Gebreslasie --- School of Agricultural, Earth and Environmental Sciences, South Africa Kabir Y Peerbhay --- School of Agricultural, Earth and Environmental Sciences, South AfricaCommercial forestry plantations are an important and valuable segment of the South African economy and forest managers are required to maximise and sustain forest productivity. However, various factors such as the outbreak of damaging agents are constantly hampering forest health... -
Economic value of non-timber forest products utilized by the households adjacent to the South Nandi forest reserve in Kenya
Item type: Journal Article • Journal: East African Agricultural and Forestry Journal • Authors: James Odhiambo Maua --- Socio-economics, Policy and Governance, Muguga, Kenya Harrison Mugatsia Tsingalia --- Biological Sciences, Kenya Joshua Cheboiwo --- Socio-economics, Policy and Governance, Muguga, KenyaMany rural dwellers in tropical regions depend on non-timber forest products (NTFPs) for their livelihood and income requirements. However, the link between the economic benefits of NTFPs and their resource base (including local availability and sustainability) and sources are poorly... -
Nutrient enrichment as a threat to the ecological resilience and health of South African microtidal estuaries
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: JB Adams --- DST/NRF Research Chair in Shallow Water Ecosystems, South Africa S Taljaard --- DST/NRF Research Chair in Shallow Water Ecosystems, South Africa L van Niekerk --- DST/NRF Research Chair in Shallow Water Ecosystems, South Africa DA Lemley --- DST/NRF Research Chair in Shallow Water Ecosystems, South AfricaNutrient pollution in South African estuaries is described using a Driver-Pressure-State-Impact-Response framework. The root cause (‘driver’) of deteriorating water quality is rapid population growth that leads to increasing inputs from wastewater treatment works (WWTWs), stormwater run-off and agricultural return flow... -
Quantifying grass productivity using remotely sensed data: an assessment of grassland restoration benefits
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Thulile Vundla --- , South Africa Onisimo Mutanga --- , South Africa Mbulisi Sibanda --- , South AfricaThis study sought to evaluate the utility of remotely sensed data in estimating the impact of wattle invasion and clearance on native grass species productivity using Sentinel-2 multispectral instrument (MSI) imaging and the partial least squares regression (PLSR) algorithm. Therefore... -
An assessment of the ecological condition of a wetland on the Lions River floodplain based on soil and vegetation parameters, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: H Ndlovu --- , South Africa DC Kotze --- , South Africa GPW Jewitt --- , South Africa CD Morris --- , South AfricaWetlands are increasingly exposed to human activities, resulting in degradation. As the wetland degrades, it loses functionality. In South Africa, wetlands can play an important water-regulating role. This study aims to establish the ecological condition of a historically utilised wetland... -
Growth and yield of African ginger in response to application of organic fertiliser
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Phomolo Maphothoma --- , Riana Kleynhans --- , Gerhard Prinsloo --- , Salmina N Mokgehle --- , Ian du Plooy --- , Hintsa T Araya --- ,African ginger (Siphonochilus aethiopicus) is in high demand for medicinal use. The plant does not multiply after being harvested, as it is destroyed in the process. The species is now facing extinction as a result of over harvesting. In order... -
The effect of adjacent vegetation on fire severity in Afrotemperate forest along the southern Cape coast of South Africa
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Brandon Giddey --- , South Africa Johan A Baard --- , South Africa Lufuno Vhengani --- , South Africa Tineke Kraaij --- , South AfricaRecently two large wildfires (around the towns of Knysna in 2017 and George in 2018) jointly burnt over 80 000 ha in the southern Cape, South Africa. Here, patches of closed-canopy Afrotemperate forest occur within a matrix of fire-prone (native)... -
Structural assemblages of plant species in the Owabi Ramsar Wetland in the Ashanti Region of Ghana
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Collins A Nsor --- , Ghana Rockson Acolatse --- , Ghana John N Mensah --- , Ghana Samuel K Oppong --- , Ghana Daniel Dompreh --- , Ghana Louis Addai-Wireko --- , GhanaAnthropogenic activities as predictors of species assemblages in the Owabi Ramsar Wetland were investigated between May and September 2019. Data were collected in 154 plots at five different sites. The prevalence index method was used to categorise the species into... -
Spectral classification, mapping and physical habitat implications of a riparian invasion by Tamarix ramosissima Ledeb. in the Touws River, Klein Karoo, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: MC Grenfell --- , South Africa TI Dube --- , South AfricaThis paper investigates the invasion of a reach of the Touws River by the deciduous alien tree Tamarix ramosissima Ledeb. (Pink Tamarisk, Saltcedar). The objectives of the paper were to investigate the utility of a delta-normalised difference vegetation index (dNDVI)... -
Cultivation of honeybush (Cyclopia spp.) in neo-colonial and multispecies landscapes of South Africa
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Sthembile Ndwandwe --- University of Cape Town, South Africa Roderick Juba --- , South Africa Matthew Sephton --- , South AfricaThe indigenous wild plants of Southern Africa are intertwined with human cultures, histories and livelihoods. By focusing on commercial cultivation of a wild plant, honeybush (Cyclopia spp.), an indigenous plant that is endemic to parts of South Africa, we discuss... -
Assessment of the impact of woody species encroachment on plant species diversity and the livelihood of pastoralists in southeastern Ethiopia
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Abdulhakim Mahmud --- Madda Walabu University, Ethiopia Habte Telila --- Madda Walabu University, Ethiopia Lemessa Kumsa --- Adama Science and Technology University, EthiopiaThe study aimed to assess the encroachment of woody plants on the rangelands of the Dallo Manna district of Bale Zone, and their impact on plant species diversity and pastoral livelihoods. Plant data were collected from 45 plots at encroaching... -
DNA sequence data confirms the presence of two closely related cypress-feeding aphid species on African cypress (Widdringtonia spp.) in South Africa
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Mesfin Wondafrash --- Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, South Africa Michael J Wingfield --- Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, South Africa Brett P Hurley --- Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, South Africa Bernard Slippers --- Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, South Africa Eston K Mutitu --- Kenya Forest Research Institute (KEFRI), Kenya Herbert Jenya --- Forestry Research Institute of Malawi, Malawi Trudy Paap --- Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, South AfricaAphids in the genus Cinara (Hemiptera: Aphididae) are pests of coniferous trees globally. Some of these aphids have become invasive in various parts of the world and have led to significant economic and environmental damage. During surveys conducted as part... -
Inferring regional, habitat and phylogenetic patterns in caliochory from bird nests in a museum collection
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Suzanne J Milton --- Wolwekraal Conservation and Research Organisation, South Africa W Richard J Dean --- Wolwekraal Conservation and Research Organisation, South AfricaCoevolution of plants and animals may lead to features or behaviour that are mutually beneficial. This is exemplified by plant adaptations for seed dispersal, including caliochory, which is the dispersal of seeds by birds in nest materials. Caliochory is a... -
DNA-based species identification as a tool to distinguish invasive Nassella species in South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Anthony Mapaura --- University of the Free State, South Africa Kim Canavan --- University of the Free State, South Africa David M Richardson --- Stellenbosch University, South Africa Nicholas C Le Maitre --- Stellenbosch University, South Africa V Ralph Clark --- University of the Free State, South Africa Sandy-Lynn Steenhuisen --- University of the Free State, South AfricaThe three non-native Nassella species (N. neesiana, N. tenuissima, and N. trichotoma) occurring in the South African montane grasslands are morphologically cryptic, and hence difficult to distinguish from several taxonomically complex, co-occurring tufted C3 perennial grass genera (e.g. Festuca), and...