Articles by Author: D H Downing

Search results for D H Downing

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  1. Notes on the ecology of natal highland sourveld vleis<sup>1</sup>

    Notes on the ecology of natal highland sourveld vleis<sup>1</sup>

    The term vlei can be applied to most natural, low‐lying, wet or damp areas in South Africa which may correspond with such categories as swamp, reedswamp, marsh and fen, but excluding pans and bogs.
  2. Reactions of grass communities to grazing and fire in the sub‐humid lowlands of Zululand*

    Reactions of grass communities to grazing and fire in the sub‐humid lowlands of Zululand*

    A stratified sample of 350 plots was used to record grass species presence, the physical conditions of glasses and forbs, and to assess grazing usage. Normal association‐analysis of the sample data identified and characterised the grass communities present which, on...
  3. Short‐term burning treatments and ecological interactions in the herb layer of false thornveld of the eastern province

    Short‐term burning treatments and ecological interactions in the herb layer of false thornveld of the eastern province

    The effects of five years of controlled burning on total floristic composition and on some important species were investigated.
  4. Influence of macchia eradication techniques on botanical composition of grasses in the döhne sourveld of the amatole mountains

    Influence of macchia eradication techniques on botanical composition of grasses in the döhne sourveld of the amatole mountains

    Grass communities identified through association‐analysis were used for determining the effects of several methods for eradicating and controlling macchia. Follow‐up burns at three frequencies applied over a ten‐year period to control macchia were found to have masked most differences in...
  5. Grass protein content and soils as factors affecting area‐selective grazing by wild herbivores in the Umfolozi game reserve, Zululand

    Grass protein content and soils as factors affecting area‐selective grazing by wild herbivores in the Umfolozi game reserve, Zululand

    Wild herbivore grazing preferences for sites on illuvial soils, as opposed to eluvial or sandy soils, were explained in terms of differences in the crude protein content of Panicum maximum, P. deustum and Themeda triandra growing on the several sites;...
  6. Complementary dominance of <em>themeda triandra</em> and panicum maximum examined through shoot production

    Complementary dominance of <em>themeda triandra</em> and panicum maximum examined through shoot production

    Sustained regrowth after defoliation was typical of P. maximum plants grown in the shade, whereas T. triandra plants were weakened under these conditions. Of three provenances of T. triandra tested, the Lowveld form was less tolerant of shading than either...
  7. Burning and grazing of a <em>Themeda</em> grassland: Estimates of phytomass and root element concentrations

    Burning and grazing of a <em>Themeda</em> grassland: Estimates of phytomass and root element concentrations

    Burning and grazing of highland grasses were examined in Döhne Sourveld to determine the effects on shoot and root masses. Root:shoot ratios of 1:4 and 1:3 were obtained for quadrennial and biennial burns respectively after two years of growth. The...
  8. Exploring the key principles of Family Medicine in sub-Saharan Africa: international Delphi consensus process

    Exploring the key principles of Family Medicine in sub-Saharan Africa: international Delphi consensus process

    Item type: Journal Article • Journal: South African Family Practice
    Background: The purpose of this study was to establish consensus on the key principles of Family Medicine for Sub-Saharan Africa.
  9. Prosodic stems in Zezuru Shona

    Prosodic stems in Zezuru Shona

    Item type: Journal Article • Journal: Southern African Linguistics and Applied Language Studies
    In the traditional Prosodic Hierarchy, the Prosodic Word is the lowest level of the hierarchy defined in terms of the interface between morphosyntactic and prosodic constituents. Recent work by Itô and Mester reaffirms this, defining Prosodic Word as matching the...