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Geographic isolation and larval dispersal shape seascape genetic patterns differently according to spatial scale ArchiMer
Dalongeville, Alicia; Andrello, Marco; Mouillot, David; Lobreaux, Stephane; Fortin, Marie-josee; Lasram, Frida; Belmaker, Jonathan; Rocklin, Delphine; Manel, Stephanie.
Genetic variation, as a basis of evolutionary change, allows species to adapt and persist in different climates and environments. Yet, a comprehensive assessment of the drivers of genetic variation at different spatial scales is still missing in marine ecosystems. Here, we investigated the influence of environment, geographic isolation, and larval dispersal on the variation in allele frequencies, using an extensive spatial sampling (47 locations) of the striped red mullet (Mullus surmuletus) in the Mediterranean Sea. Univariate multiple regressions were used to test the influence of environment (salinity and temperature), geographic isolation, and larval dispersal on single nucleotide polymorphism (SNP) allele frequencies. We used Moran's eigenvector maps...
Tipo: Text Palavras-chave: Connectivity; Ecological genetics; Marine fish; Mediterranean Sea; Mullus surmuletus; Seascape genetics; Single nucleotide polymorphism.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00454/56556/75079.pdf
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Spatial graphs highlight how multi‐generational dispersal shapes landscape genetic patterns ArchiMer
Boulanger, Emilie; Dalongeville, Alicia; Andrello, Marco; Mouillot, David; Manel, Stéphanie.
Current approaches that compare spatial genetic structure of a given species and the dispersal of its mobile phase can detect a mismatch between both patterns mainly due to processes acting at different temporal scales. Genetic structure result from gene flow and other evolutionary and demographic processes over many generations, while dispersal predicted from the mobile phase often represents solely one generation on a single time‐step. In this study, we present a spatial graph approach to landscape genetics that extends connectivity networks with a stepping‐stone model to represent dispersal between suitable habitat patches over multiple generations. We illustrate the approach with the case of the striped red mullet Mullus surmuletus in the Mediterranean...
Tipo: Text Palavras-chave: Genetic connectivity; Mediterranean Sea; Mullus surmuletus; Seascape genetics; Spatial graphs; Stepping-stone dispersal.
Ano: 2020 URL: https://archimer.ifremer.fr/doc/00630/74166/73779.pdf
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