Articles by Keyword: Mountain Streams

Search results for Mountain Streams

We found 16 results for you
  1. THE PROCESSING OF UNCONFINED, NATURALLY ENTRAINED LEAVES IN TWO LOW-ORDER SOUTHERN AFRICAN MOUNTAIN STREAMS

    THE PROCESSING OF UNCONFINED, NATURALLY ENTRAINED LEAVES IN TWO LOW-ORDER SOUTHERN AFRICAN MOUNTAIN STREAMS

    Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences
    Breakdown of unconfined and confined leaves of the riparian tree Brabejum stellatifolium L. was investigated in two low order mountain streams (Window Stream and Langrivier) in the southwestern Cape, South Africa. At both sites, 5000 unconfined leaves were released in...
  2. 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...
  3. A comparison of several methods of assessing river condition using benthic macroinvertebrate assemblages

    A comparison of several methods of assessing river condition using benthic macroinvertebrate assemblages

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    This paper attempts to address some of the problems that are faced in the endeavour to minimise the time and financial costs of environmental monitoring. At the same time, it aims to assess the usefulness to freshwater studies of some...
  4. A preliminary assessment of the impact of forest conversion from natural to pine plantation on macroinvertebrate communities in two mountain streams in Zimbabwe

    A preliminary assessment of the impact of forest conversion from natural to pine plantation on macroinvertebrate communities in two mountain streams in Zimbabwe

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    This study presents preliminary data on the influence of forest conversion from natural to pine plantation on benthic macroinvertebrates in streams in the Chimanimani Mountains in the Eastern Highlands of Zimbabwe, a region that has received little attention with respect...
  5. THE BENTHIC MACROINVERTEBRATE FAUNA OF A SOUTH AFRICAN MOUNTAIN STREAM AND ITS RESPONSE TO FIRE

    THE BENTHIC MACROINVERTEBRATE FAUNA OF A SOUTH AFRICAN MOUNTAIN STREAM AND ITS RESPONSE TO FIRE

    Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences
    The effects of a late-summer prescribed burn on the temperature and benthic macroinvertebrate fauna of a south-western Cape mountain stream were investigated over a period of 12 months. Temperature and discharge regimes appear well-defined and relatively predictable from year to...
  6. Habitat selection by large herbivores in relation to fire at the Bontebok National Park (1974–2009): the effects of management changes

    Habitat selection by large herbivores in relation to fire at the Bontebok National Park (1974–2009): the effects of management changes

    Item type: Journal Article • Journal: African Journal of Range & Forage Science
    The Bontebok National Park has long been faced with the dilemma of reconciling the need for short-interval fires, which promote grazing for bontebok, with that for longer-interval fires to maintain plant diversity. We explored habitat selection by various large herbivores...
  7. Fish migrations in two seasonal streams in Zimbabwe

    Fish migrations in two seasonal streams in Zimbabwe

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    Fish migrations into the streams of seasonally-flooded depressions (or dambos) that cover the central plateaus of Africa are a well-known phenomenon to scientists and lay people alike. However, the factors causing seasonal migrations are poorly understood and most scientific references...
  8. The toxicity of zinc to a selected macroinvertebrate, <em>Adenophlebia auriculata</em> (Ephemeroptera, Leptophlebiidae): method development

    The toxicity of zinc to a selected macroinvertebrate, <em>Adenophlebia auriculata</em> (Ephemeroptera, Leptophlebiidae): method development

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    The South African water quality guidelines for the protection of the aquatic environment are constantly being updated. The Centre for Aquatic Toxicology of the Institute for Water Research, Rhodes University, uses artificial streams and toxicological methods to contribute to the...
  9. An overview of the structure and function of microbial biofilms, with special emphasis on heterotrophic aquatic microbial communities

    An overview of the structure and function of microbial biofilms, with special emphasis on heterotrophic aquatic microbial communities

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    An overview is presented of the formation, structure and development of biofilms, and of the roles and functions of heterotrophic microbial communities in streambeds, in order to stimulate interest and research in this field in Africa. Microbial biolfilms are of...
  10. Variation in seed rain from <em>Widdringtonia whytei</em> growing in different conditions on Mulanje Mountain in Malawi

    Variation in seed rain from <em>Widdringtonia whytei</em> growing in different conditions on Mulanje Mountain in Malawi

    Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science
    Mulanje Mountain is one of the examples of tropical montane landscapes with plant populations varying in size from small fragments of less than 1 ha to riverine strips and stands of more than 100 ha. Seed availability is a potential...