Evidence of rapid change in genetic structure and diversity during range expansion in a recovering large terrestrial carnivore
Recovery of natural populations occurs often with simultaneous or subsequent range expansions. According to population genetic theory, genetic structuring emerges at the expansion front together with decreasing genetic diversity, owing to multiple founder events. Thereupon, as the expansion proceeds...
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crroyalsociety:10.1098/rspb.2015.0092 2024-06-23T07:57:22+00:00 Evidence of rapid change in genetic structure and diversity during range expansion in a recovering large terrestrial carnivore Hagen, Snorre B. Kopatz, Alexander Aspi, Jouni Kojola, Ilpo Eiken, Hans Geir 2015 http://dx.doi.org/10.1098/rspb.2015.0092 https://royalsocietypublishing.org/doi/pdf/10.1098/rspb.2015.0092 https://royalsocietypublishing.org/doi/full-xml/10.1098/rspb.2015.0092 en eng The Royal Society https://royalsociety.org/journals/ethics-policies/data-sharing-mining/ Proceedings of the Royal Society B: Biological Sciences volume 282, issue 1807, page 20150092 ISSN 0962-8452 1471-2954 journal-article 2015 crroyalsociety https://doi.org/10.1098/rspb.2015.0092 2024-06-10T04:15:08Z Recovery of natural populations occurs often with simultaneous or subsequent range expansions. According to population genetic theory, genetic structuring emerges at the expansion front together with decreasing genetic diversity, owing to multiple founder events. Thereupon, as the expansion proceeds and connectivity among populations is established, homogenization and a resurgence of genetic diversity are to be expected. Few studies have used a fine temporal scale combined with genetic sampling to track range expansions as they proceed in wild animal populations. As a natural experiment, the historical eradication of large terrestrial carnivores followed by their recovery and recolonization may facilitate empirical tests of these ideas. Here, using brown bear ( Ursus arctos ) as model species, we tested predictions from genetic theory of range expansion. Individuals from all over Finland were genotyped for every year between 1996 and 2010 using 12 validated autosomal microsatellite markers. A latitudinal shift of about 110 km was observed in the distribution and delineation of genetic clusters during this period. As the range expansion proceeded, we found, as theory predicts, that the degree of genetic structure decreased, and that both genetic variation and admixture increased. The genetic consequences of range expansions may first be detected after multiple generations, but we found major changes in genetic composition after just 1.5 generations, accompanied by population growth and increased migration. These rapid genetic changes suggest an ongoing concerted action of geographical and demographic expansion combined with substantial immigration of bears from Russia during the recovery of brown bears within the large ecosystem of northern Europe. Article in Journal/Newspaper Ursus arctos The Royal Society Proceedings of the Royal Society B: Biological Sciences 282 1807 20150092 |
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Open Polar |
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The Royal Society |
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crroyalsociety |
language |
English |
description |
Recovery of natural populations occurs often with simultaneous or subsequent range expansions. According to population genetic theory, genetic structuring emerges at the expansion front together with decreasing genetic diversity, owing to multiple founder events. Thereupon, as the expansion proceeds and connectivity among populations is established, homogenization and a resurgence of genetic diversity are to be expected. Few studies have used a fine temporal scale combined with genetic sampling to track range expansions as they proceed in wild animal populations. As a natural experiment, the historical eradication of large terrestrial carnivores followed by their recovery and recolonization may facilitate empirical tests of these ideas. Here, using brown bear ( Ursus arctos ) as model species, we tested predictions from genetic theory of range expansion. Individuals from all over Finland were genotyped for every year between 1996 and 2010 using 12 validated autosomal microsatellite markers. A latitudinal shift of about 110 km was observed in the distribution and delineation of genetic clusters during this period. As the range expansion proceeded, we found, as theory predicts, that the degree of genetic structure decreased, and that both genetic variation and admixture increased. The genetic consequences of range expansions may first be detected after multiple generations, but we found major changes in genetic composition after just 1.5 generations, accompanied by population growth and increased migration. These rapid genetic changes suggest an ongoing concerted action of geographical and demographic expansion combined with substantial immigration of bears from Russia during the recovery of brown bears within the large ecosystem of northern Europe. |
format |
Article in Journal/Newspaper |
author |
Hagen, Snorre B. Kopatz, Alexander Aspi, Jouni Kojola, Ilpo Eiken, Hans Geir |
spellingShingle |
Hagen, Snorre B. Kopatz, Alexander Aspi, Jouni Kojola, Ilpo Eiken, Hans Geir Evidence of rapid change in genetic structure and diversity during range expansion in a recovering large terrestrial carnivore |
author_facet |
Hagen, Snorre B. Kopatz, Alexander Aspi, Jouni Kojola, Ilpo Eiken, Hans Geir |
author_sort |
Hagen, Snorre B. |
title |
Evidence of rapid change in genetic structure and diversity during range expansion in a recovering large terrestrial carnivore |
title_short |
Evidence of rapid change in genetic structure and diversity during range expansion in a recovering large terrestrial carnivore |
title_full |
Evidence of rapid change in genetic structure and diversity during range expansion in a recovering large terrestrial carnivore |
title_fullStr |
Evidence of rapid change in genetic structure and diversity during range expansion in a recovering large terrestrial carnivore |
title_full_unstemmed |
Evidence of rapid change in genetic structure and diversity during range expansion in a recovering large terrestrial carnivore |
title_sort |
evidence of rapid change in genetic structure and diversity during range expansion in a recovering large terrestrial carnivore |
publisher |
The Royal Society |
publishDate |
2015 |
url |
http://dx.doi.org/10.1098/rspb.2015.0092 https://royalsocietypublishing.org/doi/pdf/10.1098/rspb.2015.0092 https://royalsocietypublishing.org/doi/full-xml/10.1098/rspb.2015.0092 |
genre |
Ursus arctos |
genre_facet |
Ursus arctos |
op_source |
Proceedings of the Royal Society B: Biological Sciences volume 282, issue 1807, page 20150092 ISSN 0962-8452 1471-2954 |
op_rights |
https://royalsociety.org/journals/ethics-policies/data-sharing-mining/ |
op_doi |
https://doi.org/10.1098/rspb.2015.0092 |
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Proceedings of the Royal Society B: Biological Sciences |
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282 |
container_issue |
1807 |
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20150092 |
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1802650971947401216 |