Waterscape genetics of the yellow perch (Perca flavescens): patterns across large connected ecosystems and isolated relict populations
Identifieur interne : 000471 ( Main/Merge ); précédent : 000470; suivant : 000472Waterscape genetics of the yellow perch (Perca flavescens): patterns across large connected ecosystems and isolated relict populations
Auteurs : Osvaldo J. Sepulveda-Villet [États-Unis] ; Carol A. Stepien [États-Unis]Source :
- Molecular Ecology [ 0962-1083 ] ; 2012-12.
Abstract
Comparisons of a species' genetic diversity and divergence patterns across large connected populations vs. isolated relict areas provide important data for understanding potential response to global warming, habitat alterations and other perturbations. Aquatic taxa offer ideal case studies for interpreting these patterns, because their dispersal and gene flow often are constrained through narrow connectivity channels that have changed over geological time and/or from contemporary anthropogenic perturbations. Our research objective is to better understand the interplay between historic influences and modern‐day factors (fishery exploitation, stocking supplementation and habitat loss) in shaping population genetic patterns of the yellow perch Perca flavescens (Percidae: Teleostei) across its native North American range. We employ a modified landscape genetics approach, analysing sequences from the entire mitochondrial DNA control region and 15 nuclear DNA microsatellite loci of 664 spawning adults from 24 populations. Results support that perch from primary glacial refugium areas (Missourian, Mississippian and Atlantic) founded contemporary northern populations. Genetic diversity today is highest in southern (never glaciated) populations and also is appreciable in northern areas that were founded from multiple refugia. Divergence is greater among isolated populations, both north and south; the southern Gulf Coast relict populations are the most divergent, reflecting their long history of isolation. Understanding the influence of past and current waterway connections on the genetic structure of yellow perch populations may help us to assess the roles of ongoing climate change and habitat disruptions towards conserving aquatic biodiversity.
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DOI: 10.1111/mec.12044
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Sepulveda-Villet</name><affiliation wicri:level="1"><country xml:lang="fr">États-Unis</country><wicri:regionArea>Great Lakes Genetics Laboratory, Lake Erie Center and Department of Environmental Sciences, The University of Toledo, 6200 Bayshore Road, OH, 43616, Toledo</wicri:regionArea><wicri:noRegion>Toledo</wicri:noRegion></affiliation><affiliation wicri:level="1"><country xml:lang="fr">États-Unis</country><wicri:regionArea>Current Address: Agricultural Research Service, US Department of Agriculture, 600 E. Greenfield Ave., WI, 53204, Milwaukee</wicri:regionArea><wicri:noRegion>Milwaukee</wicri:noRegion></affiliation></author><author><name sortKey="Stepien, Carol A" sort="Stepien, Carol A" uniqKey="Stepien C" first="Carol A." last="Stepien">Carol A. Stepien</name><affiliation wicri:level="1"><country xml:lang="fr">États-Unis</country><wicri:regionArea>Great Lakes Genetics Laboratory, Lake Erie Center and Department of Environmental Sciences, The University of Toledo, 6200 Bayshore Road, OH, 43616, Toledo</wicri:regionArea><wicri:noRegion>Toledo</wicri:noRegion></affiliation><affiliation wicri:level="1"><country wicri:rule="url">États-Unis</country></affiliation></author></analytic><monogr></monogr><series><title level="j">Molecular Ecology</title><title level="j" type="abbrev">Mol Ecol</title><idno type="ISSN">0962-1083</idno><idno type="eISSN">1365-294X</idno><imprint><publisher>Blackwell Publishing Ltd</publisher><date type="published" when="2012-12">2012-12</date><biblScope unit="volume">21</biblScope><biblScope unit="issue">23</biblScope><biblScope unit="page" from="5795">5795</biblScope><biblScope unit="page" to="5826">5826</biblScope></imprint><idno type="ISSN">0962-1083</idno></series><idno type="istex">7B5BE982C382E942DF5BE79783FD65DDE9D0E75F</idno><idno type="DOI">10.1111/mec.12044</idno><idno type="ArticleID">MEC12044</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0962-1083</idno></seriesStmt></fileDesc><profileDesc><textClass></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract">Comparisons of a species' genetic diversity and divergence patterns across large connected populations vs. isolated relict areas provide important data for understanding potential response to global warming, habitat alterations and other perturbations. Aquatic taxa offer ideal case studies for interpreting these patterns, because their dispersal and gene flow often are constrained through narrow connectivity channels that have changed over geological time and/or from contemporary anthropogenic perturbations. Our research objective is to better understand the interplay between historic influences and modern‐day factors (fishery exploitation, stocking supplementation and habitat loss) in shaping population genetic patterns of the yellow perch Perca flavescens (Percidae: Teleostei) across its native North American range. We employ a modified landscape genetics approach, analysing sequences from the entire mitochondrial DNA control region and 15 nuclear DNA microsatellite loci of 664 spawning adults from 24 populations. Results support that perch from primary glacial refugium areas (Missourian, Mississippian and Atlantic) founded contemporary northern populations. Genetic diversity today is highest in southern (never glaciated) populations and also is appreciable in northern areas that were founded from multiple refugia. Divergence is greater among isolated populations, both north and south; the southern Gulf Coast relict populations are the most divergent, reflecting their long history of isolation. Understanding the influence of past and current waterway connections on the genetic structure of yellow perch populations may help us to assess the roles of ongoing climate change and habitat disruptions towards conserving aquatic biodiversity.</div></front></TEI></record>Pour manipuler ce document sous Unix (Dilib)
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