Data from: Genetic changes caused by restocking and hydroelectric dams in demographically bottlenecked brown trout in a transnational subarctic riverine system
Habitat discontinuity, anthropogenic disturbance, and overharvesting have led to population fragmentation and declines worldwide. Preservation of remaining natural genetic diversity is crucial to avoid continued genetic erosion. Brown trout (Salmo trutta L.) is an ideal model species for studying an...
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ftzenodo:oai:zenodo.org:4983528 2023-06-06T11:58:23+02:00 Data from: Genetic changes caused by restocking and hydroelectric dams in demographically bottlenecked brown trout in a transnational subarctic riverine system Klutsch, Cornelya F. C. Maduna, Simo N. Polikarpova, Natalia Forfang, Kristin Aspholm, Paul Eric Nyman, Tommi Eiken, Hans Geir Amundsen, Per-Arne Hagen, Snorre B. 2019-05-02 https://zenodo.org/record/4983528 https://doi.org/10.5061/dryad.45482t5 unknown doi:10.1002/ece3.5191 https://zenodo.org/communities/dryad https://zenodo.org/record/4983528 https://doi.org/10.5061/dryad.45482t5 oai:zenodo.org:4983528 info:eu-repo/semantics/openAccess https://creativecommons.org/publicdomain/zero/1.0/legalcode genetic erosion Genetic integrity habitat fragmentation info:eu-repo/semantics/other dataset 2019 ftzenodo https://doi.org/10.5061/dryad.45482t510.1002/ece3.5191 2023-04-13T21:31:13Z Habitat discontinuity, anthropogenic disturbance, and overharvesting have led to population fragmentation and declines worldwide. Preservation of remaining natural genetic diversity is crucial to avoid continued genetic erosion. Brown trout (Salmo trutta L.) is an ideal model species for studying anthropogenic influences on genetic integrity, as it has experienced significant genetic alterations throughout its natural distribution range due to habitat fragmentation, overexploitation, translocations, and stocking. The Pasvik River is a subarctic riverine system shared between Norway, Russia and Finland, subdivided by seven hydroelectric power dams that destroyed about 70% of natural spawning and nursing areas. Stocking is applied in certain river parts to support the natural brown trout population. Adjacent river segments with different management strategies (stocked versus not stocked) facilitated the simultaneous assessment of genetic impacts of dams and stocking based on analyses of 16 short tandem repeat loci. Dams were expected to increase genetic differentiation between and reduce genetic diversity within river sections. Contrastingly, stocking was predicted to promote genetic homogenization and diversity, but also potentially lead to loss of private alleles and to genetic erosion. Our results showed comparatively low heterozygosity and clear genetic differentiation between adjacent sections in non-stocked river parts, indicating that dams prevent migration and contribute to genetic isolation and loss of genetic diversity. Furthermore, genetic differentiation was low and heterozygosity relatively high across stocked sections. However, in stocked river sections, we found signatures of recent bottlenecks and reductions in private alleles, indicating that only a subset of individuals contribute to reproduction, potentially leading to divergence away from the natural genetic state. Taken together, these results indicate that stocking counteracts the negative fragmentation effects of dams, but also that stocking ... Dataset Pasvik Subarctic Zenodo Norway Pasvik ENVELOPE(30.580,30.580,69.810,69.810) |
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op_collection_id |
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language |
unknown |
topic |
genetic erosion Genetic integrity habitat fragmentation |
spellingShingle |
genetic erosion Genetic integrity habitat fragmentation Klutsch, Cornelya F. C. Maduna, Simo N. Polikarpova, Natalia Forfang, Kristin Aspholm, Paul Eric Nyman, Tommi Eiken, Hans Geir Amundsen, Per-Arne Hagen, Snorre B. Data from: Genetic changes caused by restocking and hydroelectric dams in demographically bottlenecked brown trout in a transnational subarctic riverine system |
topic_facet |
genetic erosion Genetic integrity habitat fragmentation |
description |
Habitat discontinuity, anthropogenic disturbance, and overharvesting have led to population fragmentation and declines worldwide. Preservation of remaining natural genetic diversity is crucial to avoid continued genetic erosion. Brown trout (Salmo trutta L.) is an ideal model species for studying anthropogenic influences on genetic integrity, as it has experienced significant genetic alterations throughout its natural distribution range due to habitat fragmentation, overexploitation, translocations, and stocking. The Pasvik River is a subarctic riverine system shared between Norway, Russia and Finland, subdivided by seven hydroelectric power dams that destroyed about 70% of natural spawning and nursing areas. Stocking is applied in certain river parts to support the natural brown trout population. Adjacent river segments with different management strategies (stocked versus not stocked) facilitated the simultaneous assessment of genetic impacts of dams and stocking based on analyses of 16 short tandem repeat loci. Dams were expected to increase genetic differentiation between and reduce genetic diversity within river sections. Contrastingly, stocking was predicted to promote genetic homogenization and diversity, but also potentially lead to loss of private alleles and to genetic erosion. Our results showed comparatively low heterozygosity and clear genetic differentiation between adjacent sections in non-stocked river parts, indicating that dams prevent migration and contribute to genetic isolation and loss of genetic diversity. Furthermore, genetic differentiation was low and heterozygosity relatively high across stocked sections. However, in stocked river sections, we found signatures of recent bottlenecks and reductions in private alleles, indicating that only a subset of individuals contribute to reproduction, potentially leading to divergence away from the natural genetic state. Taken together, these results indicate that stocking counteracts the negative fragmentation effects of dams, but also that stocking ... |
format |
Dataset |
author |
Klutsch, Cornelya F. C. Maduna, Simo N. Polikarpova, Natalia Forfang, Kristin Aspholm, Paul Eric Nyman, Tommi Eiken, Hans Geir Amundsen, Per-Arne Hagen, Snorre B. |
author_facet |
Klutsch, Cornelya F. C. Maduna, Simo N. Polikarpova, Natalia Forfang, Kristin Aspholm, Paul Eric Nyman, Tommi Eiken, Hans Geir Amundsen, Per-Arne Hagen, Snorre B. |
author_sort |
Klutsch, Cornelya F. C. |
title |
Data from: Genetic changes caused by restocking and hydroelectric dams in demographically bottlenecked brown trout in a transnational subarctic riverine system |
title_short |
Data from: Genetic changes caused by restocking and hydroelectric dams in demographically bottlenecked brown trout in a transnational subarctic riverine system |
title_full |
Data from: Genetic changes caused by restocking and hydroelectric dams in demographically bottlenecked brown trout in a transnational subarctic riverine system |
title_fullStr |
Data from: Genetic changes caused by restocking and hydroelectric dams in demographically bottlenecked brown trout in a transnational subarctic riverine system |
title_full_unstemmed |
Data from: Genetic changes caused by restocking and hydroelectric dams in demographically bottlenecked brown trout in a transnational subarctic riverine system |
title_sort |
data from: genetic changes caused by restocking and hydroelectric dams in demographically bottlenecked brown trout in a transnational subarctic riverine system |
publishDate |
2019 |
url |
https://zenodo.org/record/4983528 https://doi.org/10.5061/dryad.45482t5 |
long_lat |
ENVELOPE(30.580,30.580,69.810,69.810) |
geographic |
Norway Pasvik |
geographic_facet |
Norway Pasvik |
genre |
Pasvik Subarctic |
genre_facet |
Pasvik Subarctic |
op_relation |
doi:10.1002/ece3.5191 https://zenodo.org/communities/dryad https://zenodo.org/record/4983528 https://doi.org/10.5061/dryad.45482t5 oai:zenodo.org:4983528 |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/publicdomain/zero/1.0/legalcode |
op_doi |
https://doi.org/10.5061/dryad.45482t510.1002/ece3.5191 |
_version_ |
1767967005713891328 |