Articles by Keyword: Foothill Zone

Search results for Foothill Zone

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  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. Pine Provenance Research in South Africa: Promises and Problems

    Item type: Journal Article • Journal: South African Forestry Journal
    Provenance research really started with the work of H.L. Duhamel Du Monceau on Pinus sylvestris in the eighteenth century. In South Africa the first properly designed provenance trials were established between 1934 and 1936 with the testing of five races...
  3. A Field Demonstration of the Effect on Streamflow of Clearing Invasive Pine and Wattle Trees from a Riparian Zone

    Item type: Journal Article • Journal: South African Forestry Journal
    Two portable weirs were used to quantify changes in streamflow following clearfelling of a dense stand of self-sown Pinus patula and Acacia mearnsii along a riparian zone on Kalmoesfontein, a SAPPI forest plantation south-east of Lydenburg, Eastern Transvaal. The weirs...
  4. The effects of N-source, shading and root zone cooling on two <em>Disa</em> hybrids

    The effects of N-source, shading and root zone cooling on two <em>Disa</em> hybrids

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Although the Disa genus contains more than 130 species, the most commonly grown is Disa unifiora and its hybrids. The evergreen Disas are indigenous to South Africa and have great potential for marketing as cut flowers or pot plants but...
  5. STUDIES ON THE ZOOBENTHOS OF SOME SOUTHERN CAPE COASTAL LAKES. SPATIAL AND TEMPORAL CHANGES IN THE BENTHOS OF SWARTVLEI, SOUTH AFRICA, IN RELATION TO CHANGES IN THE SUBMERGED LITTORAL MACROPHYTE COMMUNITY

    STUDIES ON THE ZOOBENTHOS OF SOME SOUTHERN CAPE COASTAL LAKES. SPATIAL AND TEMPORAL CHANGES IN THE BENTHOS OF SWARTVLEI, SOUTH AFRICA, IN RELATION TO CHANGES IN THE SUBMERGED LITTORAL MACROPHYTE COMMUNITY

    Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa
    Major changes in the benthic macro-invertebrate community of the littoral zone of Swartvlei, South Africa, took place between January and April 1978, and the equivalent months of 1980. These changes, which were associated with a collapse of the submerged littoral...
  6. DISTRIBUTION AND DIVERSITY OF MKUZE SWAMP FISHES DURING A SUMMER FLOOD

    DISTRIBUTION AND DIVERSITY OF MKUZE SWAMP FISHES DURING A SUMMER FLOOD

    Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences
    Very little information is available on the fishes of the Mkuze swamps and this paper presents the results of an ichthyofaunal survey conducted in March 1988. The study, which coincided with a major river flood, determined that the fish fauna...
  7. 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...
  8. The association between invertebrates and macrophytes in a tropical reservoir, Lake Kariba, Zimbabwe: a preliminary survey

    The association between invertebrates and macrophytes in a tropical reservoir, Lake Kariba, Zimbabwe: a preliminary survey

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    The invertebrate fauna associated with aquatic macrophytes in the littoral of Lake Kariba was studied over a three-month period in 2002. Animals from seven classes — Hirudinea, Oligochaeta, Turbellaria, Insecta, Crustacea, Bivalvia and Gastropoda — were collected. Two hirudineans, Placobdella...
  9. New hope for the critically endangered São Tomé Grosbeak <em>Neospiza concolor</em> and an alert to protect Obô Natural Park surroundings

    New hope for the critically endangered São Tomé Grosbeak <em>Neospiza concolor</em> and an alert to protect Obô Natural Park surroundings

    Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology
    The São Tomé Grosbeak Neospiza concolor is critically endangered, with an area of occurrence smaller than 16 km2 and an adult population under 50 individuals. It was previously thought to be restricted to old-growth forest in the southern lowlands of...
  10. Distribution of nutrients, chlorophyll and phytoplankton primary production in relation to hydrographic structures bordering the Benguela-Angolan frontal region

    Distribution of nutrients, chlorophyll and phytoplankton primary production in relation to hydrographic structures bordering the Benguela-Angolan frontal region

    Item type: Journal Article • Journal: African Journal of Marine Science
    The aim of this study was to determine the characteristic rates of phytoplankton production in water bodies bordering the Benguela-Angolan frontal region and differing in their hydrographic, hydrochemical and biological properties. Two cruises were undertaken in the vicinity of the...