Short Notes Genetic differentiation in two European tree frog ( Hyla arborea ) metapopulations in contrasted landscapes of western Switzerland Sylvain Dubey 1,2, ∗ , Sylvain Ursenbacher 1,3 , Jérôme Pellet 1,4 , Luca Fumagalli 1 Abstract. The survival of threatened species as the European tree frog ( Hyla arborea ) is strongly dependent on the genetic variability within populations, as well as gene flow between them. In Switzerland, only two sectors in its western part still harbour metapopulations. The first is characterised by a very heterogeneous and urbanized landscape, while the second is characterised by a uninterrupted array of suitable habitats. In this study, six microsatellite loci were used to establish levels of genetic differentiation among the populations from the two different locations. The results show that the metapopulations have: (i) weak levels of genetic differentiation ( F ST within metapopulation ≈ 0.04), (ii) no difference in levels of genetic structuring between them, (iii) significant ( p = 0 . 019) differences in terms of genetic diversity ( Hs ) and observed heterozygozity ( Ho ), the metapopulation located in a disturbed landscape showing lower values. Our results suggest that even if the dispersal of H. arborea
Amphibia-Reptilia – Brill
Published: Jan 1, 2009
Keywords: FRAGMENTATION; CONSERVATION; AMPHIBIANS; HYLIDAE; MICROSATELLITE MARKERS
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