Articles by Keyword: Biodiversity

Search results for Biodiversity

We found 55 results for you
  1. Conservation Developments in South African Forestry

    Item type: Journal Article • Journal: South African Forestry Journal
    The historical development of environmental conservational activities within the South African Forestry Industry is followed, and the changing emphasis from the conservation of the remaining indigenous forests (pre-1900) to water conservation, to natural assets and unplanted areas is highlighted. The...
  2. Fitting underutilised crops within research-poor environments: Lessons and approaches

    Fitting underutilised crops within research-poor environments: Lessons and approaches

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Underutilised crops, the cropping systems in which they are cultivated and the people who manage, protect and conserve them represent important elements of agricultural biodiversity. Each of these components and our knowledge of them is increasingly marginalised by the structures...
  3. DUNE MINING AND THE NHLABANE SYSTEM: CAN BIODIVERSITY AND THE NURSERY FUNCTION BE MAINTAINED?

    DUNE MINING AND THE NHLABANE SYSTEM: CAN BIODIVERSITY AND THE NURSERY FUNCTION BE MAINTAINED?

    Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences
    A four year study of the Nhlabane Estuary and Lake System was undertaken over the period 1992 to 1995. Data gathered clearly showed that in terms of ichthyofauna, the estuary plays an important role as a nursery ground for juveniles...
  4. Correlates of stocking rate and overgrazing in the Leliefontein Communal Reserve, central Namaqualand

    Correlates of stocking rate and overgrazing in the Leliefontein Communal Reserve, central Namaqualand

    Item type: Journal Article • Journal: African Journal of Range & Forage Science
    We investigate the correlates of stocking rate in the Leliefontein communal reserve and attempt to provide a mechanistic explanation of the controlling factors. We further speculate on how high stocking rates are maintained in relation to the current state of...
  5. Soil and vegetation changes across a Succulent Karoo grazing gradient

    Soil and vegetation changes across a Succulent Karoo grazing gradient

    Item type: Journal Article • Journal: African Journal of Range & Forage Science
    This study describes soil and vegetation changes radiating out from a central watering point on a livestock farm in the Succulent Ceres Karoo (Tanqua). The aim was to identify possible relationships between long-term grazing pressure, and soil and vegetation properties...
  6. Spatial and seasonal distribution of the ichthyofauna of Lake Nokoué, Bénin, west Africa

    Spatial and seasonal distribution of the ichthyofauna of Lake Nokoué, Bénin, west Africa

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    The fish biodiversity of Lake Nokoué, a lagoon in Bénin, was monitored for one year from August 2000 to July 2001 by means of samples from the artisanal fishery collected once a month at three stations. A total of 5...
  7. The effect of some environmental factors on zooplankton community biodiversity in Lake Qarun, Egypt

    The effect of some environmental factors on zooplankton community biodiversity in Lake Qarun, Egypt

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    The zooplankton of Lake Qarun was studied January–December 2003. A total of 26 species was recorded, amongst which protozoa, primarily ciliophora, were most abundant (79% of the species total), followed by rotifera (13%) and copepoda (8%). The average density ranged...
  8. The effect of water hyacinth, <em>Eichhornia crassipes</em> (Martius) SolmsLaubach (Pontederiaceae), on benthic biodiversity in two impoundments on the New Year's River, South Africa

    The effect of water hyacinth, <em>Eichhornia crassipes</em> (Martius) SolmsLaubach (Pontederiaceae), on benthic biodiversity in two impoundments on the New Year's River, South Africa

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    Water hyacinth, Eichhornia crassipes (Martius) Solms-Laubach (Pontederiaceae), forms thick mats that affect water resource utilisation, but little is known about its impacts on biodiversity in aquatic ecosystems. The benthic invertebrate community and algal biomass were sampled under water hyacinth mats...
  9. Physico-chemical conditions and macroinvertebrate fauna in the River Nile from Aswan to Cairo

    Physico-chemical conditions and macroinvertebrate fauna in the River Nile from Aswan to Cairo

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    This paper examines the distribution of benthic macroinvertebrates in relation to physico-chemical conditions along 1 035km of the River Nile from Aswan High Dam to Al Kanater Barrage, Cairo. Total Dissolved Salts and several individual chemical variables showed positive linear...
  10. The global impact of alien trout species—a review; with reference to their impact in South Africa

    The global impact of alien trout species—a review; with reference to their impact in South Africa

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    Rainbow and brown trout have been introduced into at least 82 countries, where they have significantly impacted indigenous fish, aquatic invertebrates and amphibians. In many studies the second, and sometimes the first, most serious identified threat to indigenous aquatic fauna...