%0 Journal Article
%9 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES
%A Nicolas, V.
%A Granjon, Laurent
%A Duplantier, Jean-Marc
%A Cruaud, C.
%A Dobigny, Gauthier
%T Phylogeography of spiny mice (genus Acomys, Rodentia : Muridae) from the south-western margin of the Sahara with taxonomic implications
%D 2009
%L fdi:010046333
%G ENG
%J Biological Journal of the Linnean Society
%@ 0024-4066
%K Africa ; biogeography ; cytogenetics ; desert ; morphology ; pleistocene ; rodent
%M ISI:000269315600003
%N 1
%P 29-46
%U https://www.documentation.ird.fr/hor/fdi:010046333
%> https://www.documentation.ird.fr/intranet/publi/2009/09/010046333.pdf
%V 98
%W Horizon (IRD)
%X The present study aims to depict the overall pattern of Acomys history in south-western Sahara. We tested the specific predictions that: (1) several mitochondrial clades can be identified and that they coincide with the described species; (2) successive phases of desert expansion and contraction during the last 3 Myr have resulted in several phases of demographic expansion and population fragmentation in Acomys; and (3) isolation-by-distance occurs. The extent of phylogeographic patterns and molecular genetic diversity (cytochrome b gene and D-loop) were addressed in a survey of 90 individuals of Acomys from 38 localities. Our phylogeographical analyses show a strong genetic structure within western Saharan Acomys, with several phylogroups displaying non-overlapping geographic distributions. Restricted gene flow with isolation-by-distance was recorded and a signal of population expansion was detected within several clades. We suggest that during arid or semi-arid paleoclimatic periods, when large sandy areas were present, Acomys was restricted to rocky massifs, whereas, in more humid periods, when savannah and/or steppe habitat prevailed, this species was able to disperse and to survive outside rocky areas because food resources were abundant. Based on a comprehensive sampling and the use of an integrative approach (i.e. combining cytogenetic, molecular and morphological data), we firmly propose that Acomys airensis should be considered as a junior synonym of Acomys chudeaui.
%$ 040