Supplementary material from "A century of genetic homogenization in Baltic salmon—evidence from archival DNA"
Intra-species genetic homogenization arising from anthropogenic impacts is a major threat to biodiversity. However, few taxa have sufficient historical material to systematically quantify long-term genetic changes. Using archival DNA collected over approximately 100 years, we assessed spatio-tempora...
Main Authors: | , , , , , , , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
The Royal Society
2021
|
Subjects: | |
Online Access: | https://dx.doi.org/10.6084/m9.figshare.c.5365203 https://rs.figshare.com/collections/Supplementary_material_from_A_century_of_genetic_homogenization_in_Baltic_salmon_evidence_from_archival_DNA_/5365203 |
id |
ftdatacite:10.6084/m9.figshare.c.5365203 |
---|---|
record_format |
openpolar |
spelling |
ftdatacite:10.6084/m9.figshare.c.5365203 2023-05-15T15:32:31+02:00 Supplementary material from "A century of genetic homogenization in Baltic salmon—evidence from archival DNA" Östergren, Johan Palm, Stefan Gilbey, John Spong, Göran Dannewitz, Johan Königsson, Helena Persson, John Vasemägi, Anti 2021 https://dx.doi.org/10.6084/m9.figshare.c.5365203 https://rs.figshare.com/collections/Supplementary_material_from_A_century_of_genetic_homogenization_in_Baltic_salmon_evidence_from_archival_DNA_/5365203 unknown The Royal Society https://dx.doi.org/10.1098/rspb.2020.3147 Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 CC-BY Genetics FOS Biological sciences Molecular Biology Collection article 2021 ftdatacite https://doi.org/10.6084/m9.figshare.c.5365203 https://doi.org/10.1098/rspb.2020.3147 2021-11-05T12:55:41Z Intra-species genetic homogenization arising from anthropogenic impacts is a major threat to biodiversity. However, few taxa have sufficient historical material to systematically quantify long-term genetic changes. Using archival DNA collected over approximately 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 with 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. The 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 the 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. Article in Journal/Newspaper Atlantic salmon DataCite Metadata Store (German National Library of Science and Technology) |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
unknown |
topic |
Genetics FOS Biological sciences Molecular Biology |
spellingShingle |
Genetics FOS Biological sciences Molecular Biology Östergren, Johan Palm, Stefan Gilbey, John Spong, Göran Dannewitz, Johan Königsson, Helena Persson, John Vasemägi, Anti Supplementary material from "A century of genetic homogenization in Baltic salmon—evidence from archival DNA" |
topic_facet |
Genetics FOS Biological sciences Molecular Biology |
description |
Intra-species genetic homogenization arising from anthropogenic impacts is a major threat to biodiversity. However, few taxa have sufficient historical material to systematically quantify long-term genetic changes. Using archival DNA collected over approximately 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 with 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. The 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 the 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. |
format |
Article in Journal/Newspaper |
author |
Östergren, Johan Palm, Stefan Gilbey, John Spong, Göran Dannewitz, Johan Königsson, Helena Persson, John Vasemägi, Anti |
author_facet |
Östergren, Johan Palm, Stefan Gilbey, John Spong, Göran Dannewitz, Johan Königsson, Helena Persson, John Vasemägi, Anti |
author_sort |
Östergren, Johan |
title |
Supplementary material from "A century of genetic homogenization in Baltic salmon—evidence from archival DNA" |
title_short |
Supplementary material from "A century of genetic homogenization in Baltic salmon—evidence from archival DNA" |
title_full |
Supplementary material from "A century of genetic homogenization in Baltic salmon—evidence from archival DNA" |
title_fullStr |
Supplementary material from "A century of genetic homogenization in Baltic salmon—evidence from archival DNA" |
title_full_unstemmed |
Supplementary material from "A century of genetic homogenization in Baltic salmon—evidence from archival DNA" |
title_sort |
supplementary material from "a century of genetic homogenization in baltic salmon—evidence from archival dna" |
publisher |
The Royal Society |
publishDate |
2021 |
url |
https://dx.doi.org/10.6084/m9.figshare.c.5365203 https://rs.figshare.com/collections/Supplementary_material_from_A_century_of_genetic_homogenization_in_Baltic_salmon_evidence_from_archival_DNA_/5365203 |
genre |
Atlantic salmon |
genre_facet |
Atlantic salmon |
op_relation |
https://dx.doi.org/10.1098/rspb.2020.3147 |
op_rights |
Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.6084/m9.figshare.c.5365203 https://doi.org/10.1098/rspb.2020.3147 |
_version_ |
1766363007003131904 |