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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
agricultural and biological sciences
Comparative phylogeography of two sibling species of forest-dwelling rodent (Praomys rostratus and P. tullbergi) in West Africa: Different reactions to past forest fragmentation
Molecular Ecology, Volume 17, No. 23, Year 2008
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Description
Two sibling species of the rodent genus Praomys occur in West African forests: P. tullbergi and P. rostratus. By sampling across their geographical ranges (459 individuals from 77 localities), we test the hypothesis that climatic oscillations during the Quaternary made an impact on the observed pattern of cytochrome b sequence variation. We show that, although these two species have parapatric geographical distributions, their phylogeographical histories are dissimilar, which could be related to their distinct ecological requirements. Since the arid phases of the Pleistocene were characterized by isolated forest patches, and intervening wetter periods by forest expansion, these changes in forest cover may be the common mechanism responsible for the observed phylogeographical patterns in both of these species. For example, in both species, most clades had either allopatric or parapatric geographical distributions; however, genetic diversity was much lower in P. tullbergi than in P. rostratus. The genetic pattern of P. tullbergi fits the refuge hypothesis, indicating that a very small number of populations survived in distinct forest blocks during the arid phases, then expanded again with forest recovery. In contrast, a number of populations of P. rostratus appear to have survived during the dry periods in more fragmented forest habitats, with varying levels of gene flow between these patches depending on climatic conditions and forest extent. In addition, historical variations of the West African hydrographic network could also have contributed to the pattern of genetic differentiation observed in both species. © 2008 The Authors.
Authors & Co-Authors
Nicolas, Violaine
France, Paris
Museum National D'histoire Naturelle
Bryja, Josef
Czech Republic, Brno
Institute of Vertebrate Biology of the Academy of Sciences of the Czech Republic
Akpatou, Bertin
Cote D'ivoire, Abidjan
Université de Cocody-abidjan
Cote D'ivoire, Abidjan
Centre Suisse de Recherches Scientifiques Abidjan
Konečný, Adam
Czech Republic, Brno
Institute of Vertebrate Biology of the Academy of Sciences of the Czech Republic
France, Montferrier-sur-lez
Centre de Biologie Pour la Gestion Des Populations Cbgp
Lecompte, Émilie
France, Toulouse
Université Toulouse Iii - Paul Sabatier
Colyn, Marc M.
France, Rennes
Écosystèmes, Biodiversité, Évolution
Lalis, Aude
France, Paris
Museum National D'histoire Naturelle
Couloux, Arnaud
France, Evry
Genoscope - Centre National de Séquençage
Denys, Christiane
France, Paris
Museum National D'histoire Naturelle
Granjon, Laurent
France, Montferrier-sur-lez
Centre de Biologie Pour la Gestion Des Populations Cbgp
Statistics
Citations: 65
Authors: 10
Affiliations: 8
Identifiers
Doi:
10.1111/j.1365-294X.2008.03974.x
ISSN:
09621083
e-ISSN:
1365294X
Research Areas
Environmental
Genetics And Genomics
Study Locations
Multi-countries