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Composition, pattern and diversity of some Transkeian grasslands
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: B. McKenzie --- Department of Botany,Species composition, pattern and diversity of selected grassland communities were determined by using point samples, transects and quadrats. The continuously grazed grasslands of Dohne Sourveld generally had the richer species composition, the highest diversity and the most variable intra‐community pattern... -
The presence of condensed tannin in the leaves of Eulalia villosa
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: E.W. du Toit --- , Republic of South Africa M.M. Wolfson --- , Republic of South Africa R.P. Ellis --- , Republic of South AfricaThe hypothesis that grasses contain tannin deposits in the leaf epidermal cells was tested using the leaf laminas of a southern African sourveld grass, Eulalia villosa (Thunb.) Nees. The leaf material was assayed for total phenols, condensed tannin and biologically‐active... -
Seasonal changes in nutrient content under three defoliation treatments in two coastal grassland communities of Transkei
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: C.M. Shackleton --- Department of Botany, Transkei M.T. Mentis --- Department of Botany, Republic of South AfricaChanges in nutrient concentrations were monitored over a two‐year period in two coastal grassland communities. Dry matter digestibility, crude protein, phosphorus, potassium, calcium and magnesium were determined from hand‐clipped samples of experimental treatments; namely, burning with and without subsequent grazing... -
Ecological effects of fire-breaks in the montane grasslands of the southern Drakensberg, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: TG O'Connor RG Uys AJ MillsFire-breaks, by legislation, are burnt annually before mid-winter in the southern Drakensberg, affecting 5–10% of the landscape, and resulting in marked selection for the early season flush by both livestock and wildlife. This study investigated whether this severe defoliation regime... -
Development of monitoring procedures for the herbaceous layer on the Northeastern Transvaal escarpment
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: M. Stalmans --- Resource Ecology Group, Department of Botany, Republic of South Africa M.T. Mentis --- Resource Ecology Group, Department of Botany, Republic of South AfricaA step‐wise approach was followed towards the design of a monitoring system for the herbaceous layer on the escarpment of the Drakensberg mountains in the Transvaal, South Africa. The parameter of concern was proportional species composition. In a first phase,...