Characterizing neutral and adaptive genomic differentiation in a changing climate: The most northerly freshwater fish as a model
Arctic freshwater ecosystems have been profoundly affected by climate change. Given that the Arctic charr (Salvelinus alpinus) is often the only fish species inhabiting these ecosystems, it represents a valuable model for studying the impacts of climate change on species life‐history diversity and a...
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ftpubmed:oai:pubmedcentral.nih.gov:6392408 2023-05-15T14:30:07+02:00 Characterizing neutral and adaptive genomic differentiation in a changing climate: The most northerly freshwater fish as a model O'Malley, Kathleen G. Vaux, Felix Black, Andrew N. 2019-01-15 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6392408/ https://doi.org/10.1002/ece3.4891 en eng John Wiley and Sons Inc. http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6392408/ http://dx.doi.org/10.1002/ece3.4891 © 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/ece3.4891 2019-03-10T01:15:12Z Arctic freshwater ecosystems have been profoundly affected by climate change. Given that the Arctic charr (Salvelinus alpinus) is often the only fish species inhabiting these ecosystems, it represents a valuable model for studying the impacts of climate change on species life‐history diversity and adaptability. Using a genotyping‐by‐sequencing approach, we identified 5,976 neutral single nucleotide polymorphisms and found evidence for reduced gene flow between allopatric morphs from two high Arctic lakes, Linne'vatn (Anadromous, Normal, and Dwarf) and Ellasjøen (Littoral and Pelagic). Within each lake, the degree of genetic differentiation ranged from low (Pelagic vs. Littoral) to moderate (Anadromous and Normal vs. Dwarf). We identified 17 highly diagnostic, putatively adaptive SNPs that differentiated the allopatric morphs. Although we found no evidence for adaptive differences between morphs within Ellasjøen, we found evidence for moderate (Anadromous vs. Normal) to high genetic differentiation (Anadromous and Normal vs. Dwarf) among morphs within Linne'vatn based on two adaptive loci. As these freshwater ecosystems become more productive, the frequency of sympatric morphs in Ellasjøen will likely shift based on foraging opportunities, whereas the propensity to migrate may decrease in Linne'vatn, increasing the frequency of the Normal morph. The Dwarf charr was the most genetically distinct group. Identifying the biological basis for small body size should elucidate the potential for increased growth and subsequent interbreeding with sympatric morphs. Overall, neutral and adaptive genomic differentiation between allopatric and some sympatric morphs suggests that the response of Arctic charr to climate change will be variable across freshwater ecosystems. Text Arctic charr Arctic Climate change Salvelinus alpinus PubMed Central (PMC) Arctic Ellasjøen ENVELOPE(19.031,19.031,74.388,74.388) Ecology and Evolution 9 4 2004 2017 |
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English |
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Original Research O'Malley, Kathleen G. Vaux, Felix Black, Andrew N. Characterizing neutral and adaptive genomic differentiation in a changing climate: The most northerly freshwater fish as a model |
topic_facet |
Original Research |
description |
Arctic freshwater ecosystems have been profoundly affected by climate change. Given that the Arctic charr (Salvelinus alpinus) is often the only fish species inhabiting these ecosystems, it represents a valuable model for studying the impacts of climate change on species life‐history diversity and adaptability. Using a genotyping‐by‐sequencing approach, we identified 5,976 neutral single nucleotide polymorphisms and found evidence for reduced gene flow between allopatric morphs from two high Arctic lakes, Linne'vatn (Anadromous, Normal, and Dwarf) and Ellasjøen (Littoral and Pelagic). Within each lake, the degree of genetic differentiation ranged from low (Pelagic vs. Littoral) to moderate (Anadromous and Normal vs. Dwarf). We identified 17 highly diagnostic, putatively adaptive SNPs that differentiated the allopatric morphs. Although we found no evidence for adaptive differences between morphs within Ellasjøen, we found evidence for moderate (Anadromous vs. Normal) to high genetic differentiation (Anadromous and Normal vs. Dwarf) among morphs within Linne'vatn based on two adaptive loci. As these freshwater ecosystems become more productive, the frequency of sympatric morphs in Ellasjøen will likely shift based on foraging opportunities, whereas the propensity to migrate may decrease in Linne'vatn, increasing the frequency of the Normal morph. The Dwarf charr was the most genetically distinct group. Identifying the biological basis for small body size should elucidate the potential for increased growth and subsequent interbreeding with sympatric morphs. Overall, neutral and adaptive genomic differentiation between allopatric and some sympatric morphs suggests that the response of Arctic charr to climate change will be variable across freshwater ecosystems. |
format |
Text |
author |
O'Malley, Kathleen G. Vaux, Felix Black, Andrew N. |
author_facet |
O'Malley, Kathleen G. Vaux, Felix Black, Andrew N. |
author_sort |
O'Malley, Kathleen G. |
title |
Characterizing neutral and adaptive genomic differentiation in a changing climate: The most northerly freshwater fish as a model |
title_short |
Characterizing neutral and adaptive genomic differentiation in a changing climate: The most northerly freshwater fish as a model |
title_full |
Characterizing neutral and adaptive genomic differentiation in a changing climate: The most northerly freshwater fish as a model |
title_fullStr |
Characterizing neutral and adaptive genomic differentiation in a changing climate: The most northerly freshwater fish as a model |
title_full_unstemmed |
Characterizing neutral and adaptive genomic differentiation in a changing climate: The most northerly freshwater fish as a model |
title_sort |
characterizing neutral and adaptive genomic differentiation in a changing climate: the most northerly freshwater fish as a model |
publisher |
John Wiley and Sons Inc. |
publishDate |
2019 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6392408/ https://doi.org/10.1002/ece3.4891 |
long_lat |
ENVELOPE(19.031,19.031,74.388,74.388) |
geographic |
Arctic Ellasjøen |
geographic_facet |
Arctic Ellasjøen |
genre |
Arctic charr Arctic Climate change Salvelinus alpinus |
genre_facet |
Arctic charr Arctic Climate change Salvelinus alpinus |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6392408/ http://dx.doi.org/10.1002/ece3.4891 |
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. |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1002/ece3.4891 |
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Ecology and Evolution |
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9 |
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4 |
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2004 |
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2017 |
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1766304030209867776 |