The Cape element in the Afrotemperate flora: From Cape to Cairo?

Simple item page
dc.contributor.authorGalley C.
dc.contributor.authorBytebier B.
dc.contributor.authorBellstedt D.U.
dc.contributor.authorLinder H.P.
dc.date.accessioned2011-05-15T16:00:24Z
dc.date.available2011-05-15T16:00:24Z
dc.date.issued2007
dc.description.abstractThe build-up of biodiversity is the result of immigration and in situ speciation. We investigate these two processes for four lineages (Disa, Irideae p.p., the Pentaschistis clade and Restionaceae) that are widespread in the Afrotemperate flora. These four lineages may be representative of the numerous clades which are species rich in the Cape and also occur in the highlands of tropical Africa. It is as yet unclear in which direction the lineages spread. Three hypotheses have been proposed: (i) a tropical origin with a southward migration towards the Cape, (ii) a Cape origin with a northward migration into tropical Africa, and (iii) vicariance. None of these hypotheses has been thoroughly tested. We reconstruct the historical biogeography of the four lineages using likelihood optimization onto molecular phylogenies. We find that tropical taxa are nested within a predominantly Cape clade. There is unidirectional migration from the Cape into the Drakensberg and from there northwards into tropical Africa. The amount of in situ diversification differs between areas and clades. Dating estimates show that the migration into tropical East Africa has occurred in the last 17 Myr, consistent with the Mio-Pliocene formation of the mountains in this area. © 2006 The Royal Society.
dc.description.versionArticle
dc.identifier.citationProceedings of the Royal Society B: Biological Sciences
dc.identifier.citation274
dc.identifier.citation1609
dc.identifier.issn9628452
dc.identifier.other10.1098/rspb.2006.0046
dc.identifier.urihttp://hdl.handle.net/10019.1/11683
dc.subjectbiodiversity
dc.subjectCape Floristic Region
dc.subjectcladistics
dc.subjectimmigration
dc.subjectMiocene
dc.subjectphylogeny
dc.subjectphytogeography
dc.subjectPliocene
dc.subjectspeciation (biology)
dc.subjectspecies richness
dc.subjectAfrica
dc.subjectarticle
dc.subjectbiodiversity
dc.subjectbiogeography
dc.subjectcladistics
dc.subjectEgypt
dc.subjectflora
dc.subjectgenetic line
dc.subjectmolecular phylogeny
dc.subjectnonhuman
dc.subjectphytogeography
dc.subjectplesiomorphy
dc.subjectPliocene
dc.subjectpriority journal
dc.subjectspecies differentiation
dc.subjecttropics
dc.subjectAfrica
dc.subjectCairo [Cairo (GVR)]
dc.subjectCairo [Egypt]
dc.subjectEgypt
dc.subjectNorth Africa
dc.subjectDisa
dc.subjectPentaschistis
dc.subjectRestionaceae
dc.titleThe Cape element in the Afrotemperate flora: From Cape to Cairo?
dc.typeArticle
Files
Collections
Stellenbosch University - Scopus Publications