Population structure of the oviparous South-West European common lizard
Gene flow is an important factor determining the evolution of a species, since it directly affects population structure and species’ adaptation. Here, we investigated population structure, population history, and migration among populations covering the entire distribution of the geographically isolated South-West European common lizard (Zootoca vivipara louislantzi) using 34 newly developed polymorphic microsatellite markers. The analyses unravelled the presence of isolation by distance, inbreeding, recent bottlenecks, genetic differentiation, and low levels of migration among most populations, suggesting that Z. vivipara louislantzi is threatened. The results point to discontinuous populations and are in line with physical barriers hindering longitudinal migration south to the central Pyrenean cordillera and latitudinal migration in the central Pyrenees. In contrast, evidence for longitudinal migration exists from the lowlands north to the central Pyrenean cordillera and the Cantabrian Mountains. The locations of the populations south to the central Pyrenean cordillera were identified as the first to be affected by global warming; thus, management actions aimed at avoiding population declines should start in this area.
KeywordsClimate change Conservation First-generation migrant, gene flow IBD Zootoca vivipara
J.L.H. was supported by both a EU Marie Curie-Clarín CoFund grant (ACA14-26) and the Spanish Ministry of Economy and Competitiveness postdoc grants FPDI-2013-16116 and IJCI-2015-23618. Project funds were provided by the Swiss National Science Foundation (PPOOP3_128375, PP00P3_152929/1 to P.S.F.) and the Spanish Ministry of Education and Science (CGL2008-01522, CGL2012-32459, CGL2016-76918 to P.S.F.).
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Conflict of interest
The authors declare that they have no conflict of interest.
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