Data from: Population size, habitat fragmentation, and the nature of adaptive variation in a stream fish
Whether and how habitat fragmentation and population size jointly affect adaptive genetic variation and adaptive population differentiation are largely unexplored. Owing to pronounced genetic drift, small, fragmented populations are thought to exhibit reduced adaptive genetic variation relative to l...
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ftzenodo:oai:zenodo.org:4950119 2023-06-06T11:56:43+02:00 Data from: Population size, habitat fragmentation, and the nature of adaptive variation in a stream fish Fraser, Dylan J. Debes, Paul V. Bernatchez, Louis Hutchings, Jeffrey A. 2014-07-03 https://zenodo.org/record/4950119 https://doi.org/10.5061/dryad.6t794 unknown doi:10.1098/rspb.2014.0370 https://zenodo.org/communities/dryad https://zenodo.org/record/4950119 https://doi.org/10.5061/dryad.6t794 oai:zenodo.org:4950119 info:eu-repo/semantics/openAccess https://creativecommons.org/publicdomain/zero/1.0/legalcode Salvelinus fontinalis population size habitat fragmentation info:eu-repo/semantics/other dataset 2014 ftzenodo https://doi.org/10.5061/dryad.6t79410.1098/rspb.2014.0370 2023-04-13T21:20:03Z Whether and how habitat fragmentation and population size jointly affect adaptive genetic variation and adaptive population differentiation are largely unexplored. Owing to pronounced genetic drift, small, fragmented populations are thought to exhibit reduced adaptive genetic variation relative to large populations. Yet fragmentation is known to increase variability within and among habitats as population size decreases. Such variability might instead favour the maintenance of adaptive polymorphisms and/or generate more variability in adaptive differentiation at smaller population size. We investigated these alternative hypotheses by analysing coding-gene, single-nucleotide polymorphisms associated with different biological functions in fragmented brook trout populations of variable sizes. Putative adaptive differentiation was greater between small and large populations or among small populations than among large populations. These trends were stronger for genetic population size measures than demographic ones and were present despite pronounced drift in small populations. Our results suggest that fragmentation affects natural selection and that the changes elicited in the adaptive genetic composition and differentiation of fragmented populations vary with population size. By generating more variable evolutionary responses, the alteration of selective pressures during habitat fragmentation may affect future population persistence independently of, and perhaps long before, the effects of demographic and genetic stochasticity are manifest. Cape Race_final SNP dataSNP data for 446 individuals from 14 brook trout populations originating from Cape Race, Newfoundland, Canada Dataset Newfoundland Zenodo Canada |
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Salvelinus fontinalis population size habitat fragmentation |
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Salvelinus fontinalis population size habitat fragmentation Fraser, Dylan J. Debes, Paul V. Bernatchez, Louis Hutchings, Jeffrey A. Data from: Population size, habitat fragmentation, and the nature of adaptive variation in a stream fish |
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Salvelinus fontinalis population size habitat fragmentation |
description |
Whether and how habitat fragmentation and population size jointly affect adaptive genetic variation and adaptive population differentiation are largely unexplored. Owing to pronounced genetic drift, small, fragmented populations are thought to exhibit reduced adaptive genetic variation relative to large populations. Yet fragmentation is known to increase variability within and among habitats as population size decreases. Such variability might instead favour the maintenance of adaptive polymorphisms and/or generate more variability in adaptive differentiation at smaller population size. We investigated these alternative hypotheses by analysing coding-gene, single-nucleotide polymorphisms associated with different biological functions in fragmented brook trout populations of variable sizes. Putative adaptive differentiation was greater between small and large populations or among small populations than among large populations. These trends were stronger for genetic population size measures than demographic ones and were present despite pronounced drift in small populations. Our results suggest that fragmentation affects natural selection and that the changes elicited in the adaptive genetic composition and differentiation of fragmented populations vary with population size. By generating more variable evolutionary responses, the alteration of selective pressures during habitat fragmentation may affect future population persistence independently of, and perhaps long before, the effects of demographic and genetic stochasticity are manifest. Cape Race_final SNP dataSNP data for 446 individuals from 14 brook trout populations originating from Cape Race, Newfoundland, Canada |
format |
Dataset |
author |
Fraser, Dylan J. Debes, Paul V. Bernatchez, Louis Hutchings, Jeffrey A. |
author_facet |
Fraser, Dylan J. Debes, Paul V. Bernatchez, Louis Hutchings, Jeffrey A. |
author_sort |
Fraser, Dylan J. |
title |
Data from: Population size, habitat fragmentation, and the nature of adaptive variation in a stream fish |
title_short |
Data from: Population size, habitat fragmentation, and the nature of adaptive variation in a stream fish |
title_full |
Data from: Population size, habitat fragmentation, and the nature of adaptive variation in a stream fish |
title_fullStr |
Data from: Population size, habitat fragmentation, and the nature of adaptive variation in a stream fish |
title_full_unstemmed |
Data from: Population size, habitat fragmentation, and the nature of adaptive variation in a stream fish |
title_sort |
data from: population size, habitat fragmentation, and the nature of adaptive variation in a stream fish |
publishDate |
2014 |
url |
https://zenodo.org/record/4950119 https://doi.org/10.5061/dryad.6t794 |
geographic |
Canada |
geographic_facet |
Canada |
genre |
Newfoundland |
genre_facet |
Newfoundland |
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doi:10.1098/rspb.2014.0370 https://zenodo.org/communities/dryad https://zenodo.org/record/4950119 https://doi.org/10.5061/dryad.6t794 oai:zenodo.org:4950119 |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/publicdomain/zero/1.0/legalcode |
op_doi |
https://doi.org/10.5061/dryad.6t79410.1098/rspb.2014.0370 |
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1767964463297724416 |