Comparative phylogeography of African rain forest trees: A review of genetic signatures of vegetation history in the Guineo-Congolian region

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• 作者：Olivier J. Hardy ; C茅line Born ; Katarina Budde ; Kasso Da茂nou ; Gilles Dauby ; J茅r么me Duminil ; Eben-Ezer B.K. Ew茅dj茅 ; C茅line Gomez ; Myriam Heuertz ; Guillaume K. Koffi ; Andrew J. Lowe ; Claire Micheneau ; Dyana Ndiade-Bourobou ; Rosal铆a Pi帽eiro ; Val茅rie Poncet
• 关键词：Phylogeography ; Guineo-Congolian forest ; Lower Guinea ; Climatic hinge ; Patterns of genetic diversity ; Palaeoclimates ; Forest refuge
• 刊名：Comptes Rendus Geoscience
• 出版年：July-August, 2013
• 年：2013
• 卷：345
• 期：7-8
• 页码：284-296
• 全文大小：1034 K

文摘

The biogeographic history of the African rain forests has been contentious. Phylogeography, the study of the geographic distribution of genetic lineages within species, can highlight the signatures of historical events affecting the demography and distribution of species (i.e. population fragmentation or size changes, range expansion/contraction) and, thereby, the ecosystems they belong to. The accumulation of recent data for African rain forests now enables a first biogeographic synthesis for the region. In this review, we explain which phylogeographic patterns are expected under different scenarios of past demographic change, and we give an overview of the patterns detected in African rain forest trees to discuss whether they support alternative hypotheses regarding the history of the African rain forest cover. The major genetic discontinuities in the region support the role of refugia during climatic oscillations, though not necessarily following the classically proposed scenarios. We identify in particular a genetic split between the North and the South of the Lower Guinean region. Finally we provide some perspectives for future study.