Browsing by Advisor "Yeaton, Richard I."
Now showing items 1-8 of 8
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The effect of elevated CO2 levels on the growth of two Acacia species.
(2001)Climate change, induced by increases in the concentration of greenhouse gases in the atmosphere, can affect the growth and community structure of ecosystems in two ways. Firstly directly through changes in atmospheric ... -
The effect of vesicular-arbuscular mycorrhiza on the growth of two indigenous grass species Themeda triandra and Trachypogon spicatus grown on coalmine spoil topsoil.
(1997)The main project was an assessment of the effect that colonization by five different Vesicular-arbuscular mycorrhiza (VAM) cultures have on the growth of the indigenous-grasses Themeda triandra and Trachypogon spicatus, ... -
The effects of sheep grazing on the recovery of succulent Karoo vegetation.
(1995)Vegetation monitoring, recording the recovery or change in plant cover over time, for several Karoo shrubs was undertaken to evaluate the Savory Grazing System on a farm in the Succulent Karoo. This evaluation was ... -
Nitrogen fixation and cycling in Natal valley bushveld Acacia species.
(1995)Five species, Acacia karroo, A. robusta, A. nilotica, A. sieberana and A. tortilis, were inoculated with Rhizobium and grown in potted sand in a temperature controlled greenhouse. After six months, results showed a ... -
Patterns and rate of woody vegetation cluster development in a semi- arid savanna, Natal, South Africa.
(1996)No abstract available. -
The role of overstorey proteoid shrubs in maintaining species richness in a southern Cape mountain fynbos community.
(1996)This study was conducted to determine if, and how, over storey proteoid shrubs affect the species richness of a southern Cape mountain fynbos community. Protea eximia, P. lorifolia and P. repens were the dominant ... -
Seedling establishment of Themeda triandra Forssk. in the montane grasslands of Natal.
(1994)Soil erosion and vegetation destruction have reached serious proportions in disturbed areas of the montane grasslands of the Natal Drakensberg. Little is known of the inherent ability of indigenous grasses to produce ... -
Vegetation and ant dynamics in the southern Karoo.
(1997)The aim of this thesis was to describe the structure and dynamics of ant and plant communities in the southern Karoo and to assess mechanisms of species coexistence in ant and plant communities. The role of species ...