Landscape determinants of genetic differentiation, inbreeding and genetic drift in the hazel dormouse (Muscardinus avellanarius)
| Autor: | Luciano Bani, Alessio Mortelliti, Giulia Pisa, Stefano Fagiani, Giulia Sozio, Ettore Randi, Olivia Dondina, Valerio Orioli, Elena Fabbri |
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| Přispěvatelé: | Bani, L, Orioli, V, Pisa, G, Dondina, O, Fagiani, S, Fabbri, E, Randi, E, Mortelliti, A, Sozio, G |
| Rok vydání: | 2017 |
| Předmět: |
0106 biological sciences
0301 basic medicine Isolation-by-resistance (IBR) Landscape permeability Population Muscardinus Metapopulation 010603 evolutionary biology 01 natural sciences 03 medical and health sciences Migration rate Genetic drift biology.animal Genetics Dormouse education Ecology Evolution Behavior and Systematics Migration rates education.field_of_study Habitat fragmentation Private allele biology Ecology Dispersal biology.organism_classification Ecology Evolution Behavior and Systematic Private alleles 030104 developmental biology Biological dispersal Inbreeding |
| Zdroj: | Bani, L, Orioli, V, Pisa, G, Dondina, O, Fagiani, S, Fabbri, E, Randi, E, Mortelliti, A & Sozio, G 2018, ' Landscape determinants of genetic differentiation, inbreeding and genetic drift in the hazel dormouse (Muscardinus avellanarius) ', Conservation Genetics, vol. 19, no. 2, pp. 283-296 . https://doi.org/10.1007/s10592-017-0999-6 |
| ISSN: | 1572-9737 1566-0621 |
| Popis: | The dispersal process is crucial in determining the fate of populations over time, but habitat fragmentation limits or prevents it. Landscape genetic is an effective tool to assess the degree to which dispersal still occurs in fragmented landscapes. The purpose of this study was to investigate the landscape determinants of genetic differentiation in the hazel dormouse (Muscardinus avellanarius), a forest-dependent species of conservation concern. By comparing subpopulations in a continuous (SLR) and a fragmented (VTH) population, we (i) searched for the presence of Isolation-by-Resistance (IBR); (ii) estimated migration rates; (iii) evaluated the degree of inbreeding and genetic drift, and searched for their landscape determinants. We found an IBR effect in VTH, which heavily hindered the dispersal process. The overall number of migrants among VTH subpopulations was very low (1 per generation, compared to 15 in SLR), although a between-patch displacement of about 4 km along a well-structured hedgerow probably occurred. The inbreeding (F > 0.2 in most subpopulations) and the genetic drift (four out five subpopulations showed private alleles on several loci, with relatively high frequencies) are of particular concern in VTH. However, they were found to be limited in large patches or in patches connected by hedgerows with a high number of neighbouring patches. As a conservation strategy in the VTH landscape, characterized by small patches, we suggest that the dispersal process among subpopulations is enhanced to sustain a functional metapopulation. For this purpose, an effective ecological network should be created by enhancing the continuity and the internal features of hedgerows. |
| Databáze: | OpenAIRE |
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