Evolution of population structure in an estuarine‐dependent marine fish
Restriction site‐associated DNA (RAD) sequencing was used to characterize neutral and adaptive genetic variation among geographic samples of red drum, Sciaenops ocellatus, an estuarine‐dependent fish found in coastal waters along the southeastern coast of the United States (Atlantic) and the norther...
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ftpubmed:oai:pubmedcentral.nih.gov:6434539 2023-05-15T18:06:05+02:00 Evolution of population structure in an estuarine‐dependent marine fish Hollenbeck, Christopher M. Portnoy, David S. Gold, John R. 2019-02-26 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6434539/ http://www.ncbi.nlm.nih.gov/pubmed/30962887 https://doi.org/10.1002/ece3.4936 en eng John Wiley and Sons Inc. http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6434539/ http://www.ncbi.nlm.nih.gov/pubmed/30962887 http://dx.doi.org/10.1002/ece3.4936 © 2019 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd. This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. CC-BY Original Research Text 2019 ftpubmed https://doi.org/10.1002/ece3.4936 2019-04-14T00:14:50Z Restriction site‐associated DNA (RAD) sequencing was used to characterize neutral and adaptive genetic variation among geographic samples of red drum, Sciaenops ocellatus, an estuarine‐dependent fish found in coastal waters along the southeastern coast of the United States (Atlantic) and the northern Gulf of Mexico (Gulf). Analyses of neutral and outlier loci revealed three genetically distinct regional clusters: one in the Atlantic and two in the northern Gulf. Divergence in neutral loci indicated gradual genetic change and followed a linear pattern of isolation by distance. Divergence in outlier loci was at least an order of magnitude greater than divergence in neutral loci, and divergence between the regions in the Gulf was twice that of divergence between other regions. Discordance in patterns of genetic divergence between outlier and neutral loci is consistent with the hypothesis that the former reflects adaptive responses to environmental factors that vary on regional scales, while the latter largely reflects drift processes. Differences in basic habitat, initiated by glacial retreat and perpetuated by contemporary oceanic and atmospheric forces interacting with the geomorphology of the northern Gulf, followed by selection, appear to have led to reduced gene flow among red drum across the northern Gulf, reinforcing differences accrued during isolation and resulting in continued divergence across the genome. This same dynamic also may pertain to other coastal or nearshore fishes (18 species in 14 families) where genetically or morphologically defined sister taxa occur in the three regions. Text Red drum Sciaenops ocellatus PubMed Central (PMC) Ecology and Evolution 9 6 3141 3152 |
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Original Research Hollenbeck, Christopher M. Portnoy, David S. Gold, John R. Evolution of population structure in an estuarine‐dependent marine fish |
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Original Research |
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Restriction site‐associated DNA (RAD) sequencing was used to characterize neutral and adaptive genetic variation among geographic samples of red drum, Sciaenops ocellatus, an estuarine‐dependent fish found in coastal waters along the southeastern coast of the United States (Atlantic) and the northern Gulf of Mexico (Gulf). Analyses of neutral and outlier loci revealed three genetically distinct regional clusters: one in the Atlantic and two in the northern Gulf. Divergence in neutral loci indicated gradual genetic change and followed a linear pattern of isolation by distance. Divergence in outlier loci was at least an order of magnitude greater than divergence in neutral loci, and divergence between the regions in the Gulf was twice that of divergence between other regions. Discordance in patterns of genetic divergence between outlier and neutral loci is consistent with the hypothesis that the former reflects adaptive responses to environmental factors that vary on regional scales, while the latter largely reflects drift processes. Differences in basic habitat, initiated by glacial retreat and perpetuated by contemporary oceanic and atmospheric forces interacting with the geomorphology of the northern Gulf, followed by selection, appear to have led to reduced gene flow among red drum across the northern Gulf, reinforcing differences accrued during isolation and resulting in continued divergence across the genome. This same dynamic also may pertain to other coastal or nearshore fishes (18 species in 14 families) where genetically or morphologically defined sister taxa occur in the three regions. |
format |
Text |
author |
Hollenbeck, Christopher M. Portnoy, David S. Gold, John R. |
author_facet |
Hollenbeck, Christopher M. Portnoy, David S. Gold, John R. |
author_sort |
Hollenbeck, Christopher M. |
title |
Evolution of population structure in an estuarine‐dependent marine fish |
title_short |
Evolution of population structure in an estuarine‐dependent marine fish |
title_full |
Evolution of population structure in an estuarine‐dependent marine fish |
title_fullStr |
Evolution of population structure in an estuarine‐dependent marine fish |
title_full_unstemmed |
Evolution of population structure in an estuarine‐dependent marine fish |
title_sort |
evolution of population structure in an estuarine‐dependent marine fish |
publisher |
John Wiley and Sons Inc. |
publishDate |
2019 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6434539/ http://www.ncbi.nlm.nih.gov/pubmed/30962887 https://doi.org/10.1002/ece3.4936 |
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Red drum Sciaenops ocellatus |
genre_facet |
Red drum Sciaenops ocellatus |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6434539/ http://www.ncbi.nlm.nih.gov/pubmed/30962887 http://dx.doi.org/10.1002/ece3.4936 |
op_rights |
© 2019 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd. This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
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CC-BY |
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https://doi.org/10.1002/ece3.4936 |
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Ecology and Evolution |
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9 |
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6 |
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3152 |
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