Articles by Keyword: Climate Change

Search results for Climate Change

We found 192 results for you
  1. Predicting the extent of succulent thicket under current and future climate scenarios

    Predicting the extent of succulent thicket under current and future climate scenarios

    Item type: Journal Article • Journal: African Journal of Range & Forage Science
    Using data from the distribution records of the facultative CAM succulent shrub Portulacaria afra, and high resolution climate response surfaces, we developed a spatially explicit model of the potential distribution of the species in the Thicket Biome of the eastern...
  2. Response to elevated CO<sub>2</sub> from a natural spring in a C<sub>4</sub>-dominated grassland depends on seasonal phenology

    Response to elevated CO<sub>2</sub> from a natural spring in a C<sub>4</sub>-dominated grassland depends on seasonal phenology

    Item type: Journal Article • Journal: African Journal of Range & Forage Science
    A South African C4-dominated grassland was exposed to twice-ambient atmospheric CO2 concentration using gas emitted by a natural CO2 spring and distributed over a 7m x 7m plot. A similar control plot was established 20m away at near-ambient CO2 concentrations...
  3. Climate change perceptions, drought responses and views on carbon farming amongst commercial livestock and game farmers in the semiarid Great Fish River Valley, Eastern Cape province, South Africa

    Climate change perceptions, drought responses and views on carbon farming amongst commercial livestock and game farmers in the semiarid Great Fish River Valley, Eastern Cape province, South Africa

    Item type: Journal Article • Journal: African Journal of Range & Forage Science
    There is increasing evidence that climate change will be one of the primary challenges facing future development and agriculture. Farmers, whether crop or livestock farmers, will be faced with tradeoffs and constraints as climate change exposes them to greater risk...
  4. Water policy in southern Africa: A brief synopsis of some of the macro driving forces

    Water policy in southern Africa: A brief synopsis of some of the macro driving forces

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    The water sector reforms that are underway in many parts of southern Africa are a manifestation of a global phenomenon. This is rooted in the human response to the undesirable consequences of development, and seeks to introduce the notion of...
  5. Relationship between water temperature predictability and aquatic macroinvertebrate assemblages in two South African streams

    Relationship between water temperature predictability and aquatic macroinvertebrate assemblages in two South African streams

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    Variable seasonal stream temperatures are a critical factor in maintaining aquatic invertebrate community patterns. We investigated whether the degree of predictability in a stream's water temperature profile provides insights into the structure and functional predictability of macroinvertebrate communities. Quarterly macroinvertebrate...
  6. Variations and changes in habitat, productivity, composition of aquatic biota and fisheries of the Kyoga lake system: lessons for management

    Variations and changes in habitat, productivity, composition of aquatic biota and fisheries of the Kyoga lake system: lessons for management

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    The Kyoga lake system, which is c. 4 m deep, originally had a diverse fish fauna, extensive macrophytes and wetlands. Most (82%) of its water comes from Lake Victoria, is controlled through three dams and has a short residence time...
  7. Ostrich recruitment dynamics in relation to rainfall in the Mara–Serengeti ecosystem

    Ostrich recruitment dynamics in relation to rainfall in the Mara–Serengeti ecosystem

    Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology
    Animal population dynamics can be driven by rainfall variability through its influence on habitat suitability, availability and nutritional sufficiency of forage. To understand how rainfall influences ostriches, we related changes in ostrich recruitment in the Mara–Serengeti ecosystem to rainfall. Over...
  8. Coastal oceanic climate change and variability from 1982 to 2009 around South Africa

    Coastal oceanic climate change and variability from 1982 to 2009 around South Africa

    Item type: Journal Article • Journal: African Journal of Marine Science
    Changes and fluctuations in sea surface temperature (SST) around the South African coast are analysed at a monthly scale from 1982 to 2009. There is a statistically significant negative trend of up to 0.5 °C per decade in the southern...
  9. Temporal variability of a temperate fish assemblage in Africa's oldest marine protected area

    Temporal variability of a temperate fish assemblage in Africa's oldest marine protected area

    Item type: Journal Article • Journal: African Journal of Marine Science
    A standardised research-based, shore-angling survey was conducted in the 47-year-old Tsitsikamma National Park Marine Protected Area (MPA) between 1998 and 2005. The aim of this study was to examine variability in community structure, relative abundance (catch per unit effort, CPUE)...
  10. South African kelp moving eastwards: the discovery of <em>Ecklonia maxima</em> (Osbeck) Papenfuss at De Hoop Nature Reserve on the south coast of South Africa

    South African kelp moving eastwards: the discovery of <em>Ecklonia maxima</em> (Osbeck) Papenfuss at De Hoop Nature Reserve on the south coast of South Africa

    Item type: Journal Article • Journal: African Journal of Marine Science
    Historical and recent evidence is documented to demonstrate that the eastern limit of the major kelp-bed forming seaweed Ecklonia maxima has moved c. 73 km eastward along the south coast of South Africa since 2006, after remaining unchanged for almost...