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

Details

Serval ID
serval:BIB_B62613603585
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Genetic isolation of insular populations of the Maghrebian bat, Myotis punicus, in the Mediterranean Basin
Journal
Journal of Biogeography
Author(s)
Biollaz F., Bruyndonckx N., Beuneux G., Mucedda M., Goudet J., Christe P.
ISSN
0305-0270
Publication state
Published
Issued date
2010
Peer-reviewed
Oui
Volume
37
Number
8
Pages
1557-1569
Language
english
Abstract
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).
Keywords
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
Create date
23/11/2009 14:48
Last modification date
20/08/2019 15:24
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