Spatial and temporal genetic structure of a river-resident Atlantic salmon (Salmo salar) after millennia of isolation
The river-resident Salmo salar (“småblank”) has been isolated from other Atlantic salmon populations for 9,500 years in upper River Namsen, Norway. This is the only European Atlantic salmon population accomplishing its entire life cycle in a river. Hydropower development during the last six decades...
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ftpubmed:oai:pubmedcentral.nih.gov:4063457 2023-05-15T15:29:01+02:00 Spatial and temporal genetic structure of a river-resident Atlantic salmon (Salmo salar) after millennia of isolation Sandlund, Odd Terje Karlsson, Sten Thorstad, Eva B Berg, Ole Kristian Kent, Matthew P Norum, Ine C J Hindar, Kjetil 2014-05 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4063457 http://www.ncbi.nlm.nih.gov/pubmed/24967074 https://doi.org/10.1002/ece3.1040 en eng BlackWell Publishing Ltd http://www.ncbi.nlm.nih.gov/pmc/articles/PMC http://www.ncbi.nlm.nih.gov/pubmed/24967074 http://dx.doi.org/10.1002/ece3.1040 © 2014 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd. http://creativecommons.org/licenses/by/3.0/ This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. CC-BY Original Research Text 2014 ftpubmed https://doi.org/10.1002/ece3.1040 2014-06-29T00:44:24Z The river-resident Salmo salar (“småblank”) has been isolated from other Atlantic salmon populations for 9,500 years in upper River Namsen, Norway. This is the only European Atlantic salmon population accomplishing its entire life cycle in a river. Hydropower development during the last six decades has introduced movement barriers and changed more than 50% of the river habitat to lentic conditions. Based on microsatellites and SNPs, genetic variation within småblank was only about 50% of that in the anadromous Atlantic salmon within the same river. The genetic differentiation (FST) between småblank and the anadromous population was 0.24. This is similar to the differentiation between anadromous Atlantic salmon in Europe and North America. Microsatellite analyses identified three genetic subpopulations within småblank, each with an effective population size Ne of a few hundred individuals. There was no evidence of reduced heterozygosity and allelic richness in contemporary samples (2005–2008) compared with historical samples (1955–56 and 1978–79). However, there was a reduction in genetic differentiation between sampling localities over time. SNP data supported the differentiation of småblank into subpopulations and revealed downstream asymmetric gene flow between subpopulations. In spite of this, genetic variation was not higher in the lower than in the upper areas. The meta-population structure of småblank probably maintains genetic variation better than one panmictic population would do, as long as gene flow among subpopulations is maintained. Småblank is a unique endemic island population of Atlantic salmon. It is in a precarious situation due to a variety of anthropogenic impacts on its restricted habitat area. Thus, maintaining population size and avoiding further habitat fragmentation are important. Text Atlantic salmon Salmo salar PubMed Central (PMC) Norway Ecology and Evolution 4 9 1538 1554 |
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Original Research |
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Original Research Sandlund, Odd Terje Karlsson, Sten Thorstad, Eva B Berg, Ole Kristian Kent, Matthew P Norum, Ine C J Hindar, Kjetil Spatial and temporal genetic structure of a river-resident Atlantic salmon (Salmo salar) after millennia of isolation |
topic_facet |
Original Research |
description |
The river-resident Salmo salar (“småblank”) has been isolated from other Atlantic salmon populations for 9,500 years in upper River Namsen, Norway. This is the only European Atlantic salmon population accomplishing its entire life cycle in a river. Hydropower development during the last six decades has introduced movement barriers and changed more than 50% of the river habitat to lentic conditions. Based on microsatellites and SNPs, genetic variation within småblank was only about 50% of that in the anadromous Atlantic salmon within the same river. The genetic differentiation (FST) between småblank and the anadromous population was 0.24. This is similar to the differentiation between anadromous Atlantic salmon in Europe and North America. Microsatellite analyses identified three genetic subpopulations within småblank, each with an effective population size Ne of a few hundred individuals. There was no evidence of reduced heterozygosity and allelic richness in contemporary samples (2005–2008) compared with historical samples (1955–56 and 1978–79). However, there was a reduction in genetic differentiation between sampling localities over time. SNP data supported the differentiation of småblank into subpopulations and revealed downstream asymmetric gene flow between subpopulations. In spite of this, genetic variation was not higher in the lower than in the upper areas. The meta-population structure of småblank probably maintains genetic variation better than one panmictic population would do, as long as gene flow among subpopulations is maintained. Småblank is a unique endemic island population of Atlantic salmon. It is in a precarious situation due to a variety of anthropogenic impacts on its restricted habitat area. Thus, maintaining population size and avoiding further habitat fragmentation are important. |
format |
Text |
author |
Sandlund, Odd Terje Karlsson, Sten Thorstad, Eva B Berg, Ole Kristian Kent, Matthew P Norum, Ine C J Hindar, Kjetil |
author_facet |
Sandlund, Odd Terje Karlsson, Sten Thorstad, Eva B Berg, Ole Kristian Kent, Matthew P Norum, Ine C J Hindar, Kjetil |
author_sort |
Sandlund, Odd Terje |
title |
Spatial and temporal genetic structure of a river-resident Atlantic salmon (Salmo salar) after millennia of isolation |
title_short |
Spatial and temporal genetic structure of a river-resident Atlantic salmon (Salmo salar) after millennia of isolation |
title_full |
Spatial and temporal genetic structure of a river-resident Atlantic salmon (Salmo salar) after millennia of isolation |
title_fullStr |
Spatial and temporal genetic structure of a river-resident Atlantic salmon (Salmo salar) after millennia of isolation |
title_full_unstemmed |
Spatial and temporal genetic structure of a river-resident Atlantic salmon (Salmo salar) after millennia of isolation |
title_sort |
spatial and temporal genetic structure of a river-resident atlantic salmon (salmo salar) after millennia of isolation |
publisher |
BlackWell Publishing Ltd |
publishDate |
2014 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4063457 http://www.ncbi.nlm.nih.gov/pubmed/24967074 https://doi.org/10.1002/ece3.1040 |
geographic |
Norway |
geographic_facet |
Norway |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC http://www.ncbi.nlm.nih.gov/pubmed/24967074 http://dx.doi.org/10.1002/ece3.1040 |
op_rights |
© 2014 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd. http://creativecommons.org/licenses/by/3.0/ This is an open access article under the terms of the Creative Commons Attribution 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/ece3.1040 |
container_title |
Ecology and Evolution |
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4 |
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9 |
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1538 |
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1554 |
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1766359395518644224 |