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- W2463971128 endingPage "4145" @default.
- W2463971128 startingPage "4126" @default.
- W2463971128 abstract "Dendritic metapopulations have been attributed unique properties by in silico studies, including an elevated genetic diversity relative to a panmictic population of equal total size. These predictions have not been rigorously tested in nature, nor has there been full consideration of the interacting effects among contemporary landscape features, colonization history and life history traits of the target species. We tested for the effects of dendritic structure as well as the relative importance of life history, environmental barriers and historical colonization on the neutral genetic structure of a longnose sucker (Catostomus catostomus) metapopulation in the Kogaluk watershed of northern Labrador, Canada. Samples were collected from eight lakes, genotyped with 17 microsatellites, and aged using opercula. Lakes varied in differentiation, historical and contemporary connectivity, and life history traits. Isolation by distance was detected only by removing two highly genetically differentiated lakes, suggesting a lack of migration-drift equilibrium and the lingering influence of historical factors on genetic structure. Bayesian analyses supported colonization via the Kogaluk's headwaters. The historical concentration of genetic diversity in headwaters inferred by this result was supported by high historical and contemporary effective sizes of the headwater lake, T-Bone. Alternatively, reduced allelic richness in headwaters confirmed the dendritic structure's influence on gene flow, but this did not translate to an elevated metapopulation effective size. A lack of equilibrium and upstream migration may have dampened the effects of dendritic structure. We suggest that interacting historical and contemporary factors prevent the achievement of the idealized traits of a dendritic metapopulation in nature." @default.
- W2463971128 created "2016-07-22" @default.
- W2463971128 creator A5004182752 @default.
- W2463971128 creator A5022218137 @default.
- W2463971128 creator A5029086684 @default.
- W2463971128 creator A5034403811 @default.
- W2463971128 creator A5085673424 @default.
- W2463971128 date "2016-08-10" @default.
- W2463971128 modified "2023-10-13" @default.
- W2463971128 title "A portrait of a sucker using landscape genetics: how colonization and life history undermine the idealized dendritic metapopulation" @default.
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