Data from: Demographic histories and genetic diversities of Fennoscandian marine and landlocked ringed seal subspecies
Island populations are on average smaller, genetically less diverse, and at a higher risk to go extinct than mainland populations. Low genetic diversity may elevate extinction probability, but the genetic component of the risk can be affected by the mode of diversity loss, which, in turn, is connect...
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2015
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Online Access: | https://doi.org/10.5061/dryad.r25g1 |
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fttriple:oai:gotriple.eu:50|dedup_wf_001::c780351a9eaf09fbcca4b1115dbc3276 2023-05-15T16:12:17+02:00 Data from: Demographic histories and genetic diversities of Fennoscandian marine and landlocked ringed seal subspecies Nyman, Tommi Valtonen, Mia Aspi, Jouni Ruokonen, Minna Kunnasranta, Mervi Palo, Jukka U. 2015-08-13 https://doi.org/10.5061/dryad.r25g1 undefined unknown Dryad Digital Repository https://dx.doi.org/10.5061/dryad.r25g1 http://dx.doi.org/10.5061/dryad.r25g1 lic_creative-commons 10.5061/dryad.r25g1 oai:easy.dans.knaw.nl:easy-dataset:86773 oai:services.nod.dans.knaw.nl:Products/dans:oai:easy.dans.knaw.nl:easy-dataset:86773 10|openaire____::9e3be59865b2c1c335d32dae2fe7b254 re3data_____::r3d100000044 10|re3data_____::84e123776089ce3c7a33db98d9cd15a8 10|eurocrisdris::fe4903425d9040f680d8610d9079ea14 10|re3data_____::94816e6421eeb072e7742ce6a9decc5f 10|openaire____::081b82f96300b6a6e3d282bad31cb6e2 10|opendoar____::8b6dd7db9af49e67306feb59a8bdc52c bottleneck demographic history founder event island populations Fennoscandia Lake Saimaa the Baltic Sea Lake Ladoga Northern Europe Holocene Phoca hispida saimensis Phoca hispida botnica Phoca hispida ladogensis Life sciences medicine and health care geo envir Dataset https://vocabularies.coar-repositories.org/resource_types/c_ddb1/ 2015 fttriple https://doi.org/10.5061/dryad.r25g1 2023-01-22T16:52:48Z Island populations are on average smaller, genetically less diverse, and at a higher risk to go extinct than mainland populations. Low genetic diversity may elevate extinction probability, but the genetic component of the risk can be affected by the mode of diversity loss, which, in turn, is connected to the demographic history of the population. Here, we examined the history of genetic erosion in three Fennoscandian ringed seal subspecies, of which one inhabits the Baltic Sea ‘mainland’ and two the ‘aquatic islands’ composed of Lake Saimaa in Finland and Lake Ladoga in Russia. Both lakes were colonized by marine seals after their formation c. 9500 years ago, but Lake Ladoga is larger and more contiguous than Lake Saimaa. All three populations suffered dramatic declines during the 20th century, but the bottleneck was particularly severe in Lake Saimaa. Data from 17 microsatellite loci and mitochondrial control-region sequences show that Saimaa ringed seals have lost most of the genetic diversity present in their Baltic ancestors, while the Ladoga population has experienced only minor reductions. Using Approximate Bayesian computing analyses, we show that the genetic uniformity of the Saimaa subspecies derives from an extended founder event and subsequent slow erosion, rather than from the recent bottleneck. This suggests that the population has persisted for nearly 10,000 years despite having low genetic variation. The relatively high diversity of the Ladoga population appears to result from a high number of initial colonizers and a high post-colonization population size, but possibly also by a shorter isolation period and/or occasional gene flow from the Baltic Sea. Nyman_etal_to_DRYADText-formatted DIYABC data file containing microsatellite genotypes and mitochondrial control-region sequences of Saimaa, Ladoga, and Baltic ringed seals.Nyman_etal_to_DRYAD_reftableHeadersText-formatted reftableHeader file containing scenarios, priors, and summary statistics used in the main DIYABC analyses Dataset Fennoscandia Fennoscandian Phoca hispida ringed seal Unknown |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
fttriple |
language |
unknown |
topic |
bottleneck demographic history founder event island populations Fennoscandia Lake Saimaa the Baltic Sea Lake Ladoga Northern Europe Holocene Phoca hispida saimensis Phoca hispida botnica Phoca hispida ladogensis Life sciences medicine and health care geo envir |
spellingShingle |
bottleneck demographic history founder event island populations Fennoscandia Lake Saimaa the Baltic Sea Lake Ladoga Northern Europe Holocene Phoca hispida saimensis Phoca hispida botnica Phoca hispida ladogensis Life sciences medicine and health care geo envir Nyman, Tommi Valtonen, Mia Aspi, Jouni Ruokonen, Minna Kunnasranta, Mervi Palo, Jukka U. Data from: Demographic histories and genetic diversities of Fennoscandian marine and landlocked ringed seal subspecies |
topic_facet |
bottleneck demographic history founder event island populations Fennoscandia Lake Saimaa the Baltic Sea Lake Ladoga Northern Europe Holocene Phoca hispida saimensis Phoca hispida botnica Phoca hispida ladogensis Life sciences medicine and health care geo envir |
description |
Island populations are on average smaller, genetically less diverse, and at a higher risk to go extinct than mainland populations. Low genetic diversity may elevate extinction probability, but the genetic component of the risk can be affected by the mode of diversity loss, which, in turn, is connected to the demographic history of the population. Here, we examined the history of genetic erosion in three Fennoscandian ringed seal subspecies, of which one inhabits the Baltic Sea ‘mainland’ and two the ‘aquatic islands’ composed of Lake Saimaa in Finland and Lake Ladoga in Russia. Both lakes were colonized by marine seals after their formation c. 9500 years ago, but Lake Ladoga is larger and more contiguous than Lake Saimaa. All three populations suffered dramatic declines during the 20th century, but the bottleneck was particularly severe in Lake Saimaa. Data from 17 microsatellite loci and mitochondrial control-region sequences show that Saimaa ringed seals have lost most of the genetic diversity present in their Baltic ancestors, while the Ladoga population has experienced only minor reductions. Using Approximate Bayesian computing analyses, we show that the genetic uniformity of the Saimaa subspecies derives from an extended founder event and subsequent slow erosion, rather than from the recent bottleneck. This suggests that the population has persisted for nearly 10,000 years despite having low genetic variation. The relatively high diversity of the Ladoga population appears to result from a high number of initial colonizers and a high post-colonization population size, but possibly also by a shorter isolation period and/or occasional gene flow from the Baltic Sea. Nyman_etal_to_DRYADText-formatted DIYABC data file containing microsatellite genotypes and mitochondrial control-region sequences of Saimaa, Ladoga, and Baltic ringed seals.Nyman_etal_to_DRYAD_reftableHeadersText-formatted reftableHeader file containing scenarios, priors, and summary statistics used in the main DIYABC analyses |
format |
Dataset |
author |
Nyman, Tommi Valtonen, Mia Aspi, Jouni Ruokonen, Minna Kunnasranta, Mervi Palo, Jukka U. |
author_facet |
Nyman, Tommi Valtonen, Mia Aspi, Jouni Ruokonen, Minna Kunnasranta, Mervi Palo, Jukka U. |
author_sort |
Nyman, Tommi |
title |
Data from: Demographic histories and genetic diversities of Fennoscandian marine and landlocked ringed seal subspecies |
title_short |
Data from: Demographic histories and genetic diversities of Fennoscandian marine and landlocked ringed seal subspecies |
title_full |
Data from: Demographic histories and genetic diversities of Fennoscandian marine and landlocked ringed seal subspecies |
title_fullStr |
Data from: Demographic histories and genetic diversities of Fennoscandian marine and landlocked ringed seal subspecies |
title_full_unstemmed |
Data from: Demographic histories and genetic diversities of Fennoscandian marine and landlocked ringed seal subspecies |
title_sort |
data from: demographic histories and genetic diversities of fennoscandian marine and landlocked ringed seal subspecies |
publisher |
Dryad Digital Repository |
publishDate |
2015 |
url |
https://doi.org/10.5061/dryad.r25g1 |
genre |
Fennoscandia Fennoscandian Phoca hispida ringed seal |
genre_facet |
Fennoscandia Fennoscandian Phoca hispida ringed seal |
op_source |
10.5061/dryad.r25g1 oai:easy.dans.knaw.nl:easy-dataset:86773 oai:services.nod.dans.knaw.nl:Products/dans:oai:easy.dans.knaw.nl:easy-dataset:86773 10|openaire____::9e3be59865b2c1c335d32dae2fe7b254 re3data_____::r3d100000044 10|re3data_____::84e123776089ce3c7a33db98d9cd15a8 10|eurocrisdris::fe4903425d9040f680d8610d9079ea14 10|re3data_____::94816e6421eeb072e7742ce6a9decc5f 10|openaire____::081b82f96300b6a6e3d282bad31cb6e2 10|opendoar____::8b6dd7db9af49e67306feb59a8bdc52c |
op_relation |
https://dx.doi.org/10.5061/dryad.r25g1 http://dx.doi.org/10.5061/dryad.r25g1 |
op_rights |
lic_creative-commons |
op_doi |
https://doi.org/10.5061/dryad.r25g1 |
_version_ |
1765997551418343424 |