Phylogeographical footprints of the Strait of Gibraltar and Quaternary climatic fluctuations in the western Mediterranean: a case study with the greater white-toothed shrew, Crocidura russula (Mammalia: Soricidae).

Détails

ID Serval
serval:BIB_093F6037836B
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
Phylogeographical footprints of the Strait of Gibraltar and Quaternary climatic fluctuations in the western Mediterranean: a case study with the greater white-toothed shrew, Crocidura russula (Mammalia: Soricidae).
Périodique
Molecular Ecology
Auteur(s)
Cosson J.F., Hutterer R., Libois R., Sarà M., Taberlet P., Vogel P.
ISSN
0962-1083 (Print)
ISSN-L
0962-1083
Statut éditorial
Publié
Date de publication
2005
Volume
14
Numéro
4
Pages
1151-1162
Langue
anglais
Notes
Publication types: Comparative Study ; Journal Article ; Research Support, Non-U.S. Gov't
Publication Status: ppublish
Résumé
We used mitochondrial cyt b sequences to investigate the phylogenetic relationships of Crocidura russula (sensu lato) populations across the Strait of Gibraltar, western Europe, Maghreb, and the Mediterranean and Atlantic islands. This revealed very low genetic divergence between European and Moroccan populations. The application of a molecular clock previously calibrated for shrews suggested that the separation of European from Moroccan lineages occurred less than 60 000 bp, which is at least 5 million years (Myr) after the reopening of the Strait of Gibraltar. This means that an overwater dispersal event was responsible for the observed phylogeographical structure. In contrast, genetic analyses revealed that Moroccan populations were highly distinct from Tunisian ones. According to the molecular clock, these populations separated about 2.2 million years ago (Ma), a time marked by sharp alternations of dry and humid climates in the Maghreb. The populations of the Mediterranean islands Ibiza, Pantelleria, and Sardinia were founded from Tunisian populations by overwater dispersal. In conclusion, overwater dispersal across the Strait of Gibraltar, probably assisted by humans, is possible for small terrestrial vertebrates. Moreover, as in Europe, Quaternary climatic fluctuations had a major effect on the phylogeographical structure of the Maghreb biota.
Mots-clé
Animals, Climate, Cytochromes b/genetics, Europe, Genetic Variation, Geography, Haplotypes, Mediterranean Sea, Morocco, Phylogeny, Sequence Alignment, Sequence Analysis, DNA, Shrews/genetics, Tunisia
Pubmed
Web of science
Création de la notice
24/01/2008 17:32
Dernière modification de la notice
20/08/2019 12:31
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