Archival and modern DNA SNP data of 13 Baltic salmon populations
Intra-species genetic homogenization arising from anthropogenic impacts is a major threat for biodiversity. However, few taxa have sufficient historical material to systematically quantify long-term genetic changes. Using archival DNA collected over ~100 years, we assessed spatio-temporal genetic ch...
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ftzenodo:oai:zenodo.org:4554148 2023-05-15T15:32:34+02:00 Archival and modern DNA SNP data of 13 Baltic salmon populations Östergren, Johan 2021-02-21 https://zenodo.org/record/4554148 https://doi.org/10.5061/dryad.2bvq83bpb unknown https://zenodo.org/communities/dryad https://zenodo.org/record/4554148 https://doi.org/10.5061/dryad.2bvq83bpb oai:zenodo.org:4554148 info:eu-repo/semantics/openAccess https://creativecommons.org/publicdomain/zero/1.0/legalcode info:eu-repo/semantics/other dataset 2021 ftzenodo https://doi.org/10.5061/dryad.2bvq83bpb 2023-03-10T16:03:09Z Intra-species genetic homogenization arising from anthropogenic impacts is a major threat for biodiversity. However, few taxa have sufficient historical material to systematically quantify long-term genetic changes. Using archival DNA collected over ~100 years, we assessed spatio-temporal genetic change in Atlantic salmon populations across the Baltic Sea, an area heavily impacted by hydropower exploitation and associated large-scale mitigation stocking. Analysis was carried out by screening 82 SNPs in 1680 individuals from 13 Swedish rivers. We found an overall decrease in genetic divergence and diminished isolation by distance among populations, strongly indicating genetic homogenization over the past century. We further observed an increase in genetic diversity within populations consistent with increased gene flow. Temporal genetic change was lower in larger wild populations than in smaller wild and hatchery-reared ones, indicating that larger populations have been able to support a high number of native spawners in relation to immigrants. Our results demonstrate that stocking practices of salmon in the Baltic Sea have led to homogenization of populations over the last century, potentially compromising their ability to adapt to environmental change. Stocking of reared fish is common worldwide and our study is a cautionary example of the potentially long-term negative effects of such activities. Funding provided by: Svenska Forskningsrådet FormasCrossref Funder Registry ID: http://dx.doi.org/10.13039/501100001862Award Number: 2013-1288 Dataset Atlantic salmon Zenodo |
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Intra-species genetic homogenization arising from anthropogenic impacts is a major threat for biodiversity. However, few taxa have sufficient historical material to systematically quantify long-term genetic changes. Using archival DNA collected over ~100 years, we assessed spatio-temporal genetic change in Atlantic salmon populations across the Baltic Sea, an area heavily impacted by hydropower exploitation and associated large-scale mitigation stocking. Analysis was carried out by screening 82 SNPs in 1680 individuals from 13 Swedish rivers. We found an overall decrease in genetic divergence and diminished isolation by distance among populations, strongly indicating genetic homogenization over the past century. We further observed an increase in genetic diversity within populations consistent with increased gene flow. Temporal genetic change was lower in larger wild populations than in smaller wild and hatchery-reared ones, indicating that larger populations have been able to support a high number of native spawners in relation to immigrants. Our results demonstrate that stocking practices of salmon in the Baltic Sea have led to homogenization of populations over the last century, potentially compromising their ability to adapt to environmental change. Stocking of reared fish is common worldwide and our study is a cautionary example of the potentially long-term negative effects of such activities. Funding provided by: Svenska Forskningsrådet FormasCrossref Funder Registry ID: http://dx.doi.org/10.13039/501100001862Award Number: 2013-1288 |
format |
Dataset |
author |
Östergren, Johan |
spellingShingle |
Östergren, Johan Archival and modern DNA SNP data of 13 Baltic salmon populations |
author_facet |
Östergren, Johan |
author_sort |
Östergren, Johan |
title |
Archival and modern DNA SNP data of 13 Baltic salmon populations |
title_short |
Archival and modern DNA SNP data of 13 Baltic salmon populations |
title_full |
Archival and modern DNA SNP data of 13 Baltic salmon populations |
title_fullStr |
Archival and modern DNA SNP data of 13 Baltic salmon populations |
title_full_unstemmed |
Archival and modern DNA SNP data of 13 Baltic salmon populations |
title_sort |
archival and modern dna snp data of 13 baltic salmon populations |
publishDate |
2021 |
url |
https://zenodo.org/record/4554148 https://doi.org/10.5061/dryad.2bvq83bpb |
genre |
Atlantic salmon |
genre_facet |
Atlantic salmon |
op_relation |
https://zenodo.org/communities/dryad https://zenodo.org/record/4554148 https://doi.org/10.5061/dryad.2bvq83bpb oai:zenodo.org:4554148 |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/publicdomain/zero/1.0/legalcode |
op_doi |
https://doi.org/10.5061/dryad.2bvq83bpb |
_version_ |
1766363056074391552 |