Museum specimens of a landlocked pinniped reveal recent loss of genetic diversity and unexpected population connections
The Saimaa ringed seal (Pusa hispida saimensis) is endemic to Lake Saimaa in Finland. The subspecies is thought to have originated when parts of the ringed seal population of the Baltic region were trapped in lakes emerging due to postglacial bedrock rebound around 9000 years ago. During the 20th ce...
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ftunivhelsihelda:oai:helda.helsinki.fi:10138/355410 2024-04-28T08:36:48+00:00 Museum specimens of a landlocked pinniped reveal recent loss of genetic diversity and unexpected population connections Heino, Matti Nyman, Tommi Palo, Jukka U. Harmoinen, Jenni Valtonen, Mia Pilot, Malgorzata Översti, Sanni Salmela, Elina Kunnasranta, Mervi Väinölä, Risto Hoelzel, A. Rus Aspi, Jouni Medicum Department of Forensic Medicine Forensic Medicine Institute of Biotechnology Organismal and Evolutionary Biology Research Programme Faculty of Biological and Environmental Sciences Molecular and Integrative Biosciences Research Programme Faculty of Science Zoology PaleOmics Laboratory 2023-03-02T11:29:01Z 16 application/pdf http://hdl.handle.net/10138/355410 eng eng Wiley 10.1002/ece3.9720 Heino , M , Nyman , T , Palo , J U , Harmoinen , J , Valtonen , M , Pilot , M , Översti , S , Salmela , E , Kunnasranta , M , Väinölä , R , Hoelzel , A R & Aspi , J 2023 , ' Museum specimens of a landlocked pinniped reveal recent loss of genetic diversity and unexpected population connections ' , Ecology and Evolution , vol. 13 , no. 1 , e9720 . https://doi.org/10.1002/ece3.9720 ORCID: /0000-0003-3812-3543/work/132083955 ORCID: /0000-0003-1326-4462/work/156702960 http://hdl.handle.net/10138/355410 f7399546-139f-43f5-92b8-87ca77d51991 36699566 85147212427 000917202300001 cc_by info:eu-repo/semantics/openAccess openAccess Saimaa ringed seal Freshwater pinniped Genetic diversity Genetic drift mitochondrial DNA Museum specimens 1172 Environmental sciences Article publishedVersion 2023 ftunivhelsihelda 2024-04-03T15:21:21Z The Saimaa ringed seal (Pusa hispida saimensis) is endemic to Lake Saimaa in Finland. The subspecies is thought to have originated when parts of the ringed seal population of the Baltic region were trapped in lakes emerging due to postglacial bedrock rebound around 9000 years ago. During the 20th century, the population experienced a drastic human-induced bottleneck. Today encompassing a little over 400 seals with extremely low genetic diversity, it is classified as endangered. We sequenced sections of the mitochondrial control region from 60 up to 125-years-old museum specimens of the Saimaa ringed seal. The generated dataset was combined with publicly available sequences. We studied how genetic variation has changed through time in this subspecies and how it is phylogenetically related to other ringed seal populations from the Baltic Sea, Lake Ladoga, North America, Svalbard, and the White Sea. We observed temporal fluctuations in haplotype frequencies and loss of haplotypes accompanied by a recent reduction in female effective population size. In apparent contrast with the traditionally held view of the Baltic origin of the population, the Saimaa ringed seal mtDNA variation also shows affinities to North American ringed seals. Our results suggest that the Saimaa ringed seal has experienced recent genetic drift associated with small population size. The results further suggest that extant Baltic ringed seal is not representative of the ancestral population of the Saimaa ringed seal, which calls for re-evaluation of the deep history of this subspecies. Peer reviewed Article in Journal/Newspaper Pusa hispida ringed seal Svalbard White Sea HELDA – University of Helsinki Open Repository Ecology and Evolution 13 1 |
institution |
Open Polar |
collection |
HELDA – University of Helsinki Open Repository |
op_collection_id |
ftunivhelsihelda |
language |
English |
topic |
Saimaa ringed seal Freshwater pinniped Genetic diversity Genetic drift mitochondrial DNA Museum specimens 1172 Environmental sciences |
spellingShingle |
Saimaa ringed seal Freshwater pinniped Genetic diversity Genetic drift mitochondrial DNA Museum specimens 1172 Environmental sciences Heino, Matti Nyman, Tommi Palo, Jukka U. Harmoinen, Jenni Valtonen, Mia Pilot, Malgorzata Översti, Sanni Salmela, Elina Kunnasranta, Mervi Väinölä, Risto Hoelzel, A. Rus Aspi, Jouni Museum specimens of a landlocked pinniped reveal recent loss of genetic diversity and unexpected population connections |
topic_facet |
Saimaa ringed seal Freshwater pinniped Genetic diversity Genetic drift mitochondrial DNA Museum specimens 1172 Environmental sciences |
description |
The Saimaa ringed seal (Pusa hispida saimensis) is endemic to Lake Saimaa in Finland. The subspecies is thought to have originated when parts of the ringed seal population of the Baltic region were trapped in lakes emerging due to postglacial bedrock rebound around 9000 years ago. During the 20th century, the population experienced a drastic human-induced bottleneck. Today encompassing a little over 400 seals with extremely low genetic diversity, it is classified as endangered. We sequenced sections of the mitochondrial control region from 60 up to 125-years-old museum specimens of the Saimaa ringed seal. The generated dataset was combined with publicly available sequences. We studied how genetic variation has changed through time in this subspecies and how it is phylogenetically related to other ringed seal populations from the Baltic Sea, Lake Ladoga, North America, Svalbard, and the White Sea. We observed temporal fluctuations in haplotype frequencies and loss of haplotypes accompanied by a recent reduction in female effective population size. In apparent contrast with the traditionally held view of the Baltic origin of the population, the Saimaa ringed seal mtDNA variation also shows affinities to North American ringed seals. Our results suggest that the Saimaa ringed seal has experienced recent genetic drift associated with small population size. The results further suggest that extant Baltic ringed seal is not representative of the ancestral population of the Saimaa ringed seal, which calls for re-evaluation of the deep history of this subspecies. Peer reviewed |
author2 |
Medicum Department of Forensic Medicine Forensic Medicine Institute of Biotechnology Organismal and Evolutionary Biology Research Programme Faculty of Biological and Environmental Sciences Molecular and Integrative Biosciences Research Programme Faculty of Science Zoology PaleOmics Laboratory |
format |
Article in Journal/Newspaper |
author |
Heino, Matti Nyman, Tommi Palo, Jukka U. Harmoinen, Jenni Valtonen, Mia Pilot, Malgorzata Översti, Sanni Salmela, Elina Kunnasranta, Mervi Väinölä, Risto Hoelzel, A. Rus Aspi, Jouni |
author_facet |
Heino, Matti Nyman, Tommi Palo, Jukka U. Harmoinen, Jenni Valtonen, Mia Pilot, Malgorzata Översti, Sanni Salmela, Elina Kunnasranta, Mervi Väinölä, Risto Hoelzel, A. Rus Aspi, Jouni |
author_sort |
Heino, Matti |
title |
Museum specimens of a landlocked pinniped reveal recent loss of genetic diversity and unexpected population connections |
title_short |
Museum specimens of a landlocked pinniped reveal recent loss of genetic diversity and unexpected population connections |
title_full |
Museum specimens of a landlocked pinniped reveal recent loss of genetic diversity and unexpected population connections |
title_fullStr |
Museum specimens of a landlocked pinniped reveal recent loss of genetic diversity and unexpected population connections |
title_full_unstemmed |
Museum specimens of a landlocked pinniped reveal recent loss of genetic diversity and unexpected population connections |
title_sort |
museum specimens of a landlocked pinniped reveal recent loss of genetic diversity and unexpected population connections |
publisher |
Wiley |
publishDate |
2023 |
url |
http://hdl.handle.net/10138/355410 |
genre |
Pusa hispida ringed seal Svalbard White Sea |
genre_facet |
Pusa hispida ringed seal Svalbard White Sea |
op_relation |
10.1002/ece3.9720 Heino , M , Nyman , T , Palo , J U , Harmoinen , J , Valtonen , M , Pilot , M , Översti , S , Salmela , E , Kunnasranta , M , Väinölä , R , Hoelzel , A R & Aspi , J 2023 , ' Museum specimens of a landlocked pinniped reveal recent loss of genetic diversity and unexpected population connections ' , Ecology and Evolution , vol. 13 , no. 1 , e9720 . https://doi.org/10.1002/ece3.9720 ORCID: /0000-0003-3812-3543/work/132083955 ORCID: /0000-0003-1326-4462/work/156702960 http://hdl.handle.net/10138/355410 f7399546-139f-43f5-92b8-87ca77d51991 36699566 85147212427 000917202300001 |
op_rights |
cc_by info:eu-repo/semantics/openAccess openAccess |
container_title |
Ecology and Evolution |
container_volume |
13 |
container_issue |
1 |
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1797568428164251648 |