DIVERSIFICATION OF THE AFRICAN GENUSPROTEA(PROTEACEAE) IN THE CAPE BIODIVERSITY HOTSPOT AND BEYOND: EQUAL RATES IN DIFFERENT BIOMES
- 1 March 2010
- Vol. 64 (3), 745-760
- https://doi.org/10.1111/j.1558-5646.2009.00856.x
Abstract
The Cape region of South Africa is a hotspot of flowering plant biodiversity. However, the reasons why levels of diversity and endemism are so high remain obscure. Here, we reconstructed phylogenetic relationships among species in the genus Protea, which has its center of species richness and endemism in the Cape, but also extends through tropical Africa as far as Eritrea and Angola. Contrary to previous views, the Cape is identified as the ancestral area for the radiation of the extant lineages: most species in subtropical and tropical Africa are derived from a single invasion of that region. Moreover, diversification rates have been similar within and outside the Cape region. Migration out of the Cape has opened up vast areas, but those lineages have not diversified as extensively at fine spatial scales as lineages in the Cape. Therefore, higher net rates of diversification do not explain the high diversity and endemism of Protea in the Cape. Instead, understanding why the Cape is so diverse requires an explanation for how Cape species are able to diverge and persist at such small spatial scales.Keywords
This publication has 63 references indexed in Scilit:
- Explaining the uniqueness of the Cape flora: Incorporating geomorphic evolution as a factor for explaining its diversificationMolecular Phylogenetics and Evolution, 2008
- What can phylogenetics tell us about speciation in the Cape flora?Diversity and Distributions, 2005
- Phylogeny, biogeography, and the evolution of life-history traits in Leucadendron (Proteaceae)Molecular Phylogenetics and Evolution, 2004
- Ribosomal ITS sequences and plant phylogenetic inferenceMolecular Phylogenetics and Evolution, 2003
- AFLP PHYLOGENY OF MIMULUS SECTION ERYTHRANTHE AND THE EVOLUTION OF HUMMINGBIRD POLLINATIONEvolution, 2003
- Molecular Systematics, GISH and the Origin of Hybrid Taxa in Nicotiana (Solanaceae)Annals of Botany, 2003
- Recent Diversification Rates in North American Tiger Beetles Estimated from a Dated mtDNA Phylogenetic TreeMolecular Biology and Evolution, 2002
- Phylogenetics and Diversification in PelargoniumPublished by Informa UK Limited ,1999
- Pollination biology of the Proteaceae in Australia and southern AfricaAustralian Journal of Ecology, 1987
- Taxonomic Notes on Tropical African Species of ProteaKew Bulletin, 1987