Genetic isolation of insular populations of the Maghrebian bat, Myotis punicus, in the Mediterranean Basin

Détails

ID Serval
serval:BIB_B62613603585
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Genetic isolation of insular populations of the Maghrebian bat, Myotis punicus, in the Mediterranean Basin
Périodique
Journal of Biogeography
Auteur(s)
Biollaz F., Bruyndonckx N., Beuneux G., Mucedda M., Goudet J., Christe P.
ISSN
0305-0270
Statut éditorial
Publié
Date de publication
2010
Peer-reviewed
Oui
Volume
37
Numéro
8
Pages
1557-1569
Langue
anglais
Résumé
We investigate the population genetic structure of the Maghrebian bat, Myotis punicus, between the mainland and islands to assess the island colonization pattern and current gene flow between nearby islands and within the mainland.
Location
North Africa and the Mediterranean islands of Corsica and Sardinia.
Methods
We sequenced part of the control region (HVII) of 79 bats across 11 colonies. The phylogeographical pattern was assessed by analysing molecular diversity indices, examining differentiation among populations and estimating divergence time. In addition, we genotyped 182 bats across 10 colonies at seven microsatellite loci. We used analysis of molecular variance and a Bayesian approach to infer nuclear population structure. Finally, we estimated sex-specific dispersal between Corsica and Sardinia.
Results
Mitochondrial analyses indicated that colonies between Corsica, Sardinia and North Africa are highly differentiated. Within islands there was no difference between colonies, while at the continental level Moroccan and Tunisian populations were highly differentiated. Analyses with seven microsatellite loci showed a similar pattern. The sole difference was the lack of nuclear differentiation between populations in North Africa, suggesting a male-biased dispersal over the continental area. The divergence time of Sardinian and Corsican populations was estimated to date back to the early and mid-Pleistocene.
Main conclusions
Island colonization by the Maghrebian bats seems to have occurred in a stepping-stone manner and certainly pre-dated human colonization. Currently, open water seems to prevent exchange of bats between the two islands, despite their ability to fly and the narrowness of the strait of Bonifacio. Corsican and Sardinian populations are thus currently isolated from any continental gene pool and must therefore be considered as different evolutionarily significant units (ESU).
Mots-clé
Bats, Chiroptera, Corsica, island biogeography, Mediterranean Basin, North Africa, phylogeography, population genetics, Sardinia, MESSINIAN SALINITY CRISIS, MULTILOCUS GENOTYPE DATA, ISLAND POPULATIONS, SEQUENCE ALIGNMENT, F-STATISTICS, MITOCHONDRIAL PHYLOGEOGRAPHY, DEMOGRAPHIC PARAMETERS, EVOLUTIONARY GENETICS, INTEGRATED SOFTWARE, CAVE SALAMANDERS
Web of science
Création de la notice
23/11/2009 15:48
Dernière modification de la notice
20/08/2019 16:24
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