Articles by Author: Kirsten Nicole Adams

Search results for Kirsten Nicole Adams

We found 100 results for you
  1. The function of the hygroscopic awn of <em>Themeda triandra</em> <sup>1</sup>

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    The hygroscopic awn of species such as Themeda triandra is widely believed to be a device ensuring the early burial of its seed. This belief has been extensively tested and no tendency for such self‐burial has been found. It has...
  2. Invloed van bewerking en besproeiing op die verwering van gneis in die Augrabies-gebied

    Invloed van bewerking en besproeiing op die verwering van gneis in die Augrabies-gebied

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Fisiese, chemiese en mineralogiese kriteria is gebruik om te bepaal of veranderinge in eienskappe van gronde op gneise, in die Augrabies-gebied, as gevolg van bewerking en besproeiing plaasgevind het. Bewerking en besproeiing van die halfverweerde gneise het die verweringsproses versnel...
  3. The mineralogy of five weathering profiles developed from Archaean granite in the eastern Transvaal, Republic of South Africa

    The mineralogy of five weathering profiles developed from Archaean granite in the eastern Transvaal, Republic of South Africa

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Mineralogical, chemical and electron microscopy studies were carried out on five weathering profiles developed on Archaean granites from the Nelspruit area to study changes in the distribution of primary minerals and their weathering products with profile development. The pedons differ...
  4. Pedogenic differences between two adjacent basalt-derived soil profiles 1. Textural and chemical characteristics

    Pedogenic differences between two adjacent basalt-derived soil profiles 1. Textural and chemical characteristics

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Eleven soil samples derived from a black vertisol (Arcadia form) and a red alfisol (Shortlands form) were investigated by means of X-ray fluorescence as well as standard soil chemical and physical analyses. The profiles developed from Jurassic basalt under identical...
  5. Pedogenic differences between two adjacent basalt-derived soil profiles 2. Mineralogical characteristics

    Pedogenic differences between two adjacent basalt-derived soil profiles 2. Mineralogical characteristics

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The mineralogical composition of a black vertisol (Arcadia form) and a red alfisol (Shortlands form) profile, derived from Jurassic basalt and situated 35 m apart, has been determined by means of X-ray diffraction analysis. The non-clay fractions of the least-weathered...
  6. Monitoring of seabirds in the Benguela upwelling system: can seabirds be used as indicators and predictors of change in the marine environment?

    Monitoring of seabirds in the Benguela upwelling system: can seabirds be used as indicators and predictors of change in the marine environment?

    Item type: Journal Article • Journal: South African Journal of Marine Science
    Historical and contemporary data on Benguela seabirds assumed to be responsive to changes in food availability are reviewed as potential indicators and predictors of change in the ecosystem. Cyclic variations in the annual yields of seabird products evident at decadal...
  7. Trends in pelagic fish populations of the Saldanha Bay region, southern Benguela upwelling system, 1980–1990: a predator's perspective

    Trends in pelagic fish populations of the Saldanha Bay region, southern Benguela upwelling system, 1980–1990: a predator's perspective

    Item type: Journal Article • Journal: South African Journal of Marine Science
    Changes in monthly and annual prey species composition of African penguins Spheniscus demersus are described from 1 454 stomach samples collected from two breeding islands in the Saldanha Bay region of the southern Benguela upwelling system between 1980 and 1990...
  8. Foraging effort and prey choice in Cape gannets

    Foraging effort and prey choice in Cape gannets

    Item type: Journal Article • Journal: South African Journal of Marine Science
    In order to test the hypothesis that sardine Sardinops sagax are the preferred prey of Cape gannets Morus capensis, the link between foraging effort and prey choice was evaluated by simultaneously monitoring the activity and the diet of adult birds...