Articles by Keyword: Riverine Ecosystems

Search results for Riverine Ecosystems

We found 29 results for you
  1. THE EFFECTS OF TROUT-FARM EFFLUENTS ON BENTHIC INVERTEBRATE COMMUNITY STRUCTURE IN RIVERS IN THE SOUTH-WESTERN CAPE, SOUTH AFRICA

    THE EFFECTS OF TROUT-FARM EFFLUENTS ON BENTHIC INVERTEBRATE COMMUNITY STRUCTURE IN RIVERS IN THE SOUTH-WESTERN CAPE, SOUTH AFRICA

    Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences
    The south-western Cape is currently responsible for 45% of the total annual trout production in South Africa and further expansion of this industry in the region is likely. A preliminary survey of seven trout farms situated on the upper reaches...
  2. Beacons in the limnological landscape

    Beacons in the limnological landscape

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    An overview is given of a number of major developments in the limnology of South Africa, Zimbabwe and Namibia. None was possible without the involvement of enthusiastic investigators who, over some 70 years, stimulated the growth of freshwater research in...
  3. Optimising stocking rate under commercial and subsistence pastoralism <em>optimisering van veelading by kommersiele en bestaansveeboerdery</em>

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    Hopes for a single criterion of overstocking are forlorn. Livestock may be kept for any of many purposes, and the stocking rate optimal for one is not necessarily so for another. Conflicts might be resolved by (1) recognising the likely...
  4. Nitrogen mineralization, nitrification and nitrogen balance in laboratory incubation of soil from natural grassland in the central Orange Free State

    Nitrogen mineralization, nitrification and nitrogen balance in laboratory incubation of soil from natural grassland in the central Orange Free State

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Air-dried soil from three layers under grassveld was moistened by the addition of 12 levels of water and incubated for up to two years at five temperatures in screw-capped preserving jars with an air-filled head- space equivalent to seven times...
  5. NUTRIENTS AND THE PRODUCTIVITY OF ESTUARINE AND COASTAL MARINE ECOSYSTEMS

    NUTRIENTS AND THE PRODUCTIVITY OF ESTUARINE AND COASTAL MARINE ECOSYSTEMS

    Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa
    Recent research on estuarine and coastal marine systems has revealed two particularly interesting things about nutrients and productivity. First is the observation that these areas are among the most intensively fertilized environments on earth. Second is the common finding that...
  6. DEEP SEA, ESTUARINE AND FRESHWATER FISHES: LIFE HISTORY STRATEGIES AND ECOLOGICAL BOUNDARIES

    DEEP SEA, ESTUARINE AND FRESHWATER FISHES: LIFE HISTORY STRATEGIES AND ECOLOGICAL BOUNDARIES

    Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences
    The life histories of fishes from three different ecosystems are compared and discussed with emphasis on species that move between habitats: between estuary and sea in tropical northern Australia; between bottom waters and pelagic waters of the temperate continental slope...
  7. A CHARACTERIZATION OF SOUTHERN AFRICAN ESTUARINE SYSTEMS

    A CHARACTERIZATION OF SOUTHERN AFRICAN ESTUARINE SYSTEMS

    Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences
    Modifications to the structure and functioning of southern African estuarine systems can be placed into two major categories; those changes that have been driven by global forces such as climatic and sea-level fluctuations, and those that have resulted from direct...
  8. COASTAL AQUATIC ECOSYSTEMS, CONSERVATION AND MANAGEMENT STRATEGIES IN NIGERIA

    COASTAL AQUATIC ECOSYSTEMS, CONSERVATION AND MANAGEMENT STRATEGIES IN NIGERIA

    Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences
    The coastal ecosystems in Nigeria are classified into four broad regions according to differences in general morphology, vegetation and beach type. They are the barrier lagoon complex, the transgressive mud beach, the Niger delta and the strand coast. The delta...
  9. The Ellis paradigm — humans, herbivores and rangeland systems

    The Ellis paradigm — humans, herbivores and rangeland systems

    Item type: Journal Article • Journal: African Journal of Range & Forage Science
    The scientific and conceptual contributions Jim Ellis made throughout the course of his career reveal a logical progression towards increased understanding of pastoral ecosystems worldwide. Research in wildlife, large herbivores, systems ecology and energy flows through grazing ecosystems formed the...
  10. 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...