Landscape determinants of genetic differentiation, inbreeding and genetic drift in the hazel dormouse (Muscardinus avellanarius)

摘要: The dispersal process is crucial in determining the fate of populations over time, but habitat fragmentation limits or prevents it. Landscape genetic an effective tool to assess degree which still occurs fragmented landscapes. purpose this study was investigate landscape determinants differentiation hazel dormouse (Muscardinus avellanarius), a forest-dependent species conservation concern. By comparing subpopulations continuous (SLR) and (VTH) population, we (i) searched for presence Isolation-by-Resistance (IBR); (ii) estimated migration rates; (iii) evaluated inbreeding drift, their determinants. We found IBR effect VTH, heavily hindered process. overall number migrants among VTH very low (1 per generation, compared 15 SLR), although between-patch displacement about 4 km along well-structured hedgerow probably occurred. (F > 0.2 most subpopulations) drift (four out five showed private alleles on several loci, with relatively high frequencies) are particular concern VTH. However, they were be limited large patches connected by hedgerows neighbouring patches. As strategy landscape, characterized small patches, suggest that enhanced sustain functional metapopulation. For purpose, ecological network should created enhancing continuity internal features hedgerows.