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Browsing Journal Articles by Subject "Ecology"

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Annotated bibliography of South African indigenous evergreen forest ecology

Author: Geldenhuys, CJ Date: 1985 Annotated references to 519 publications are presented, together with keyword listings and keyword, regional, place name and taxonomic indices. This bibliography forms part of the first phase of the activities of the Forest Biome Task Group. Read more
Bergwind fires and the location pattern of forest patches in the southern cape landscape, South-Africa

Author: Geldenhuys, CJ Date: Jan 1994 A hypothesis is developed that environmental factors (rainfall and substrate) determine the potential limits of forest distribution, but that actual forest location pattern is determined by the fire pattern, which in turn is determined by the ... Read more
Canopy structure in savannas along a moisture gradient on Kalahari sands

Author: Scholes, RJ ; Frost, PGH ; Tian, Y Date: Mar 2004 Measurements of tree canopy architecture were made at six savanna sites on deep, sandy soils, along a gradient of increasing aridity. There was substantial variation in the leaf area estimated within each site, using the same sample frame, ... Read more
Climate and the inter-annual variability of fire in southern Africa: a meta-analysis using long-term field data and satellite-derived burnt area data

Author: Archibald, S ; Nickless, A ; Govender, Nicolin ; Scholes, RJ ; Lehsten, V Date: Nov 2010 This study investigates inter-annual variability in burnt area in southern Africa and the extent to which climate is responsible for this variation. We compare data from long-term field sites across the region with remotely sensed burnt area ... Read more
Coastal dunes of South Africa

Author: Tinley, KL Date: 1985 A synthesis is presented on the ecology of South African coastal dune ecosystems, which comprise about 80% of South Africa's 3 000 km shoreline. A detailed description of the extent, structure and functioning of these ecosystems is given. ... Read more
Dryland salinity: threatening water resources in the semi-arid Western Cape

Author: Bugan, Richard DH ; De Clercq, W ; Jovanovic, Nebojsa Date: Nov 2010 Increased dryland salinity in the Swartland and Overberg regions poses a threat to the bread basket of the Western Cape, water resources in an already water-stressed area, water supply to the industrialised Saldanha region as well as the ... Read more
Ecological risk assessment as a framework for environmental impact assessments

Author: Claassen, Marius Date: 1999 Environmental impact assessments in South Africa are usually conducted according to the integrated environmental management (IEM) procedure. The preliminary investigation reported here, indicated that most of the ecological requirements ... Read more
Ecosystem services, efficiency, sustainability and equity: South Africa's Working for Water Programme

Author: Van Wilgen, BW ; Le Maitre, David C ; Cowling, RM Date: Sep 1998 In this paper, South Africa’s working for water programme is described. The programme maximizes an ecosystem services (the delivery of water), enhances sustainability by eliminating invading alien plants, and promotes social equity through ... Read more
Effect of fire season, fire frequency, rainfall and management on fire intensity in savanna vegetation in South Africa

Author: Govender, N ; Trollope, WSW ; Van Wilgen, BW Date: Aug 2006 Fire is important for the maintenance and conservation of African savanna ecosystems. Despite the importance of fire intensity as a key element of the fire regime, it is seldom measured or included in fire records. 2. We estimated fire intensity ... Read more
The fire-vegetation-climate system: how ecology can contribute to earth system science

Author: Archibald, S Date: May 2013 Since the time of Darwin, Wallace and Schimper, botanists and ecologists have been interested in understanding the global distribution of vegetation. Such questions are becoming more pressing as Earth System modellers attempt to predict the ... Read more
Influence of timing and spatial extent of savanna fires in southern Africa on atmospheric emissions

Author: Korontzi, S ; Justice, CO ; Scholes, RJ Date: Jun 2003 Biomass burning is an important ecosystem process in southern Africa, with significant implications for regional and. global atmospheric chemistry and biogeochemical cycles. In this paper, representative Land sat path-row scene locations, ... Read more
Mapping the potential ranges of major plant invaders in South Africa, Lesotho and Swaziland using climatic suitability

Author: Rouget, M ; Richardson, DM ; Nel, JL ; Le Maitre, David C ; Egoh, Benis N ; Mgidi, T Date: Sep 2004 Most national or regional initiatives aimed at managing biological invasions lack objective protocols for prioritizing invasive species and areas based on likely future dimensions of spread. South Africa has one of the most ambitious national ... Read more
New species of Pseudagrion ( Odonata: Zygoptera) with descriptions of the larvae of five other species belonging to the genus

Author: Chutter, FM Date: 1962 In the course of an ecological survey of the macro-invertebrate fauna of the stream and rivers in the catchment of the Vaal Dam the author found a new species of Pseudagrion which is described here. The author’s colleagues, engaged in similar ... Read more
Observations on the ecology growth and physiology of microcystis aeruginosa in the laboratory and in the field

Author: Scott, WE Date: 15 Nov 1979 As a result of potential toxin production the blue-green alga microcystis aeruginosa is a serious problem in eutrophic impoundments in South Africa. This study reports on growth characteristics of M. aeruginosa in the laboratory and is ... Read more
On the ecology of the fauna of stones in the current in a South African river supporting a very large simulium (Diptera) population

Author: Chutter, FM Date: Dec 1968 There is a large population of Simulium chutteri lewis in the Vaal river at and below the village of Warrenton in the north-east of the Cape Province, South Africa. The female of this species attacks man, cattle and horses and had become a ... Read more
Physio-climatic classification of South Africa's woodland biome

Author: Fairbanks, DHK Date: Jul 2000 In an effort to develop more holistic ecosystem approaches to resource assessment and management, landscapes need to be stratified into homogeneous geographic regions. These regions can then be used in a monitoring framework to develop reliable ... Read more
Rainfall and topo-edaphic influences on woody community phenology in South African savannas

Author: Shackleton, CM Date: Mar 1999 Woody community phenology was studied in the central lowveld, South Africa, over a twelve month period at three sites along a rainfall gradient, with both toplands and bottomlands sampled at each site. Each month, individual plants, in ... Read more
Recovery of South African fynbos vegetation following alien woody plant clearing and fire: implications for restoration

Author: Holmes, PM ; Richardson, DM ; Van Wilgen, BW ; Gelderblom, C Date: Dec 2000 The recovery of fynbos vegetation after invasion by dense stands of alien trees, and clearing by either 'burn standing’,’ fell and burn', or 'fell, remove and burn' treatments, was investigated in two watersheds in the Western Cape Province, ... Read more
Reliability of a method of sampling stream invertebrates

Author: Chutter, FM ; Noble, RG Date: May 1966 In field ecological studies inferences must often be drawn from dissimilarities in numbers and species of organisms found in biological samples collected at different times and under various conditions. Read more
Tree cover in sub-Saharan Africa: rainfall and fire constrain forest and savanna as alternative stable states

Author: Staver, AC ; Archibald, S ; Levin, S Date: 2011 Savannas are known as ecosystems with tree cover below climate-defined equilibrium values. However, a predictive framework for understanding constraints on tree cover is lacking. The authors present a) a spatially extensive analysis of tree ... Read more

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