Seddon, J.M., Santucci, F., Reeve, N., and Hewitt, G.M. (2002) Caucasus Mountains divide postulated postglacial colonization routes in the white-breasted hedgehog, Erinaceus concolor. Journal of Evolutionary Biology, 15 (3). pp. 463-467.

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Abstract

For many European species, the mountains of the Alps and the Pyrenees have acted as significant barriers to northwards colonization from southern glacial refugia. To the east, the Caucasus Mountains would seem to have been a similar barrier to the white-breasted hedgehog (Erinaceus concolor). A deep divergence among hedgehog mitochondrial sequences to the north and south of the Caucasus Mountains suggests two colonization routes, originating from separate refugial regions and divided by this mountain barrier. From a Balkan refugium, hedgehogs have colonized northwards into Russia and to the northern foothills of the Caucasus Mountains. The origins of hedgehogs colonizing the southern parts of the Caucasus are not entirely clear, although fossil and climatic data suggest a glacial refugium on the southern shores of the Black Sea. Divergence within the southern group indicates a long-standing fragmentation within such a refugium or the presence of further cryptic refugia in Turkey and the Near East. The Caucasus barrier would seem to have been an important factor in structuring the late Pleistocene distribution of species.

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