Geography of Africa Rubiaceae with reference to glacial rain forest refugees.
Robbrecht, E.
In this paper it is found that the rubiaceae is among the most diversified and largest of the families in the African rain forest and consequently presents sample to test the theory of glacial forest refuges. Most forest Rubiaceae are ecologically selective and present sufficiently low long-distance dispersal potential to quality. Generic diversity centers, patterns of endmism and disjunctions in lowland forest Rubiaceae generally corroborate the theory. It is also found that the refugees are characterized by genetic endemism, a fact perhaps indicating that the ice ages had a catastrophic influence on the flora of tropical Africa. The data assembled (i) point towards modifications of the delimitation of accepted refuge areas, and (ii) indicate the existence of a few more refuge areas, e.g. in the Zaire basin and in the Indian Ocean coastal belt.
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