Original Research

Phytogeography and speciation in the vegetation of the eastern Cape

G. E. Gibbs Russell, E. R. Robinson
Bothalia | Vol 13, No 3/4 | a1353 | DOI: https://doi.org/10.4102/abc.v13i3/4.1353 | © 1981 G. E. Gibbs Russell, E. R. Robinson | This work is licensed under CC Attribution 4.0
Submitted: 10 November 1981 | Published: 10 November 1981

About the author(s)

G. E. Gibbs Russell, Botanical Research Institute, Department of Agriculture and Fisheries, South Africa
E. R. Robinson, Department of Botany, University of the Witwatersrand, South Africa

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Abstract

The eastern Cape is a region of variable environmental factors, with a flora estimated at about 3 600 -4 000 species and encompassing 21 of Acocks’s (1975) veld types. It lies at the edges of the major phytochoria present in southern Africa, with many tropical species reaching the southern and western limits o f their distribution, and many south-western Cape and Karoo species reaching the northern and eastern limits of their distribution. The apparently low incidence o f species endemic to the eastern Cape may be the result of selection for ‘generalist’ genotypes and the close proximity of different phytochoria, which may allow species to migrate between phytochoria to fill niches resulting from environmental change.


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Crossref Citations

1. Observations of the effects of drought on evergreen and deciduous species in the eastern Cape forests
C.J. Geldenhuys
South African Journal of Botany  vol: 59  issue: 5  first page: 522  year: 1993  
doi: 10.1016/S0254-6299(16)30699-8