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A study of variations in floristic composition of highveld in the eastern Transvaal
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: D.L. Barnes --- Department of Agriculture (Transvaal Region), B.H. Beukes --- Department of Agriculture (Transvaal Region), G.D. Kotzé --- Department of Agriculture (Transvaal Region),Floristic surveys of two 1500m line transects in veld provided data which indicated the nature of variations in veld composition, expressed in terms of species, palatability classes or weighted palatability classes. The transects were subjectively subdivided into units comprising relatively... -
Variations in floristic and palatability composition, yield of veld and of soil characteristics on a paddock scale
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: D.L. Barnes --- Department of Agriculture and Water Supply (Transvaal Region), Republic of South Africa G.D. Kotzé --- Department of Agriculture and Water Supply (Transvaal Region), Republic of South Africa B.H. Beukes --- Department of Agriculture and Water Supply (Transvaal Region), Republic of South Africa C. Kohlmeyer --- Department of Agriculture and Water Supply (Transvaal Region), Republic of South AfricaFive parallel 900-m line-transects were laid out 100 m apart in relatively homogeneous veld. Floristic composition, yields of dry matter, soil forms and series, effective depth, clay content of the top and subsoil, and the pH of the topsoil were... -
Determining termite diversity in arid Namibian rangelands – a comparison of sampling methods
Item type: Journal Article • Journal: African Zoology • Authors: J. Zeidler --- Desert Research Foundation of Namibia, Namibia S. Hanrahan --- Department of Animal, Plant and Environmental Sciences, South Africa M. Scholes --- Department of Animal, Plant and Environmental Sciences, South AfricaThree methods of sampling termite diversity in arid rangelands were tested in Namibia during the wet (March) and dry (October) seasons of 1998. Six sites were chosen: one pair on each of three farms representing a gradient of land use... -
Influence of riparian habitats on the distribution of rainforest chameleons in Parc National de Ranomafana, Madagascar
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Jeanneney Rabearivony --- , , Madagascar Lee D. Brady --- , , UK Richard K.B. Jenkins --- , , UK Richard A. Griffiths --- , , UK Achille P. Raselimanana --- , , Madagascar Michel Bisoa --- , Rasoamampionona N. Raminosoa --- , , MadagascarThe spatial and seasonal distribution of chameleon species along ecological gradients within six riparian areas in Parc National de Ranomafana was studied using transects. Eight species of chameleons were recorded (Palleon nasus, Brookesia superciliaris, B. thieli, Calumma gastrotaenia, C. glawi,... -
Status of birds of prey in Guinea-Bissau: first assessment based on road surveys
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Mohamed Henriques --- Marine and Environmental Sciences Centre (MARE), Portugal Miguel Lecoq --- BirdLife International, Senegal Hamilton Monteiro --- Coastal Planning Office, Guinea-Bissau Aissa Regalla --- Instituto da Biodiversidade e Áreas Protegidas (IBAP), Guinea-Bissau José P Granadeiro --- Centro de estudos do ambiente e do mar (CESAM), Departamento de Biologia Animal, Faculdade de Ciências, Portugal Paulo Catry --- Marine and Environmental Sciences Centre (MARE), PortugalSeveral studies have reported marked declines in populations of birds of prey across the African continent, including West Africa. However, there are still regions of which virtually nothing is known, as is the case for Guinea-Bissau. Because birds of prey... -
A survey of Great-winged Petrels Pterodroma macroptera breeding at sub-Antarctic Marion Island and a revised global population estimate
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Ben J Dilley --- , South Africa David W Hedding --- , South Africa Stefan Schoombie --- , South Africa Peter G Ryan --- , South AfricaAlthough burrow-nesting petrels are the most abundant group of seabirds in the Southern Ocean, their global populations are poorly known, because most species breed on remote islands. For example, there are no accurate estimates for Great-winged Petrel Pterodroma macroptera populations... -
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...