Genetic diversity, structure and gene flow of migratory barren-ground caribou (Rangifer tarandus groenlandicus) in Canada
Migratory barren-ground caribou (Rangifer tarandus groenlandicus) provide an opportunity to examine the genetic population structure of a migratory large mammal whose movements and distribution, in some instances, have not been heavily influenced by human activities that result in habitat loss or fr...
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ftdoajarticles:oai:doaj.org/article:9b0abe44a2d94a468674268d24441f78 2023-05-15T15:00:36+02:00 Genetic diversity, structure and gene flow of migratory barren-ground caribou (Rangifer tarandus groenlandicus) in Canada Keri McFarlane Anne Gunn Mitch Campbell Mathieu Dumond Jan Adamczewski Greg Wilson 2016-05-01T00:00:00Z https://doi.org/10.7557/2.36.1.3577 https://doaj.org/article/9b0abe44a2d94a468674268d24441f78 EN eng Septentrio Academic Publishing https://septentrio.uit.no/index.php/rangifer/article/view/3577 https://doaj.org/toc/1890-6729 doi:10.7557/2.36.1.3577 1890-6729 https://doaj.org/article/9b0abe44a2d94a468674268d24441f78 Rangifer, Vol 36, Iss 1 (2016) barren-ground caribou Canadian arctic conservation dispersal gene flow genetic variation Animal culture SF1-1100 article 2016 ftdoajarticles https://doi.org/10.7557/2.36.1.3577 2022-12-31T08:11:38Z Migratory barren-ground caribou (Rangifer tarandus groenlandicus) provide an opportunity to examine the genetic population structure of a migratory large mammal whose movements and distribution, in some instances, have not been heavily influenced by human activities that result in habitat loss or fragmentation. These caribou have likely reached large effective population sizes since their rapid radiation during the early Holocene despite cyclic changes in abundance. Migratory barren-ground caribou are managed as discrete subpopulations. We investigated genetic variation among those subpopulations to determine the patterns of genetic diversity within and among them, and the implications for long-term persistence of caribou. We identified three distinct genetic clusters across the Canadian arctic tundra: the first cluster consisted of all fully-continental migratory barren-ground subpopulations; the second cluster was the Dolphin and Union caribou; and the third cluster was caribou from Southampton Island. The Southampton Island caribou are especially genetically distinct from the other barren-ground type caribou. Gene flow among subpopulations varied across the range. Occasional gene flow across the sea-ice is likely the reason for high levels of genetic variation in the Dolphin and Union subpopulation, which experienced very low numbers in the past. These results suggest that for most migratory caribou subpopulations, connectivity among subpopulations plays an important role in maintaining natural genetic diversity. Our analyses provide insight into the levels of microsatellite genetic diversity and patterns of gene flow that may be common to large subpopulations that historically had a continuous distribution across a large continental range. These data can also be used as a benchmark to compare the effects of habitat fragmentation and bottlenecks on other large caribou populations. Article in Journal/Newspaper Arctic caribou Rangifer Rangifer tarandus Sea ice Southampton Island Tundra Directory of Open Access Journals: DOAJ Articles Arctic Canada Southampton Island ENVELOPE(-84.501,-84.501,64.463,64.463) Rangifer 36 1 1 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
barren-ground caribou Canadian arctic conservation dispersal gene flow genetic variation Animal culture SF1-1100 |
spellingShingle |
barren-ground caribou Canadian arctic conservation dispersal gene flow genetic variation Animal culture SF1-1100 Keri McFarlane Anne Gunn Mitch Campbell Mathieu Dumond Jan Adamczewski Greg Wilson Genetic diversity, structure and gene flow of migratory barren-ground caribou (Rangifer tarandus groenlandicus) in Canada |
topic_facet |
barren-ground caribou Canadian arctic conservation dispersal gene flow genetic variation Animal culture SF1-1100 |
description |
Migratory barren-ground caribou (Rangifer tarandus groenlandicus) provide an opportunity to examine the genetic population structure of a migratory large mammal whose movements and distribution, in some instances, have not been heavily influenced by human activities that result in habitat loss or fragmentation. These caribou have likely reached large effective population sizes since their rapid radiation during the early Holocene despite cyclic changes in abundance. Migratory barren-ground caribou are managed as discrete subpopulations. We investigated genetic variation among those subpopulations to determine the patterns of genetic diversity within and among them, and the implications for long-term persistence of caribou. We identified three distinct genetic clusters across the Canadian arctic tundra: the first cluster consisted of all fully-continental migratory barren-ground subpopulations; the second cluster was the Dolphin and Union caribou; and the third cluster was caribou from Southampton Island. The Southampton Island caribou are especially genetically distinct from the other barren-ground type caribou. Gene flow among subpopulations varied across the range. Occasional gene flow across the sea-ice is likely the reason for high levels of genetic variation in the Dolphin and Union subpopulation, which experienced very low numbers in the past. These results suggest that for most migratory caribou subpopulations, connectivity among subpopulations plays an important role in maintaining natural genetic diversity. Our analyses provide insight into the levels of microsatellite genetic diversity and patterns of gene flow that may be common to large subpopulations that historically had a continuous distribution across a large continental range. These data can also be used as a benchmark to compare the effects of habitat fragmentation and bottlenecks on other large caribou populations. |
format |
Article in Journal/Newspaper |
author |
Keri McFarlane Anne Gunn Mitch Campbell Mathieu Dumond Jan Adamczewski Greg Wilson |
author_facet |
Keri McFarlane Anne Gunn Mitch Campbell Mathieu Dumond Jan Adamczewski Greg Wilson |
author_sort |
Keri McFarlane |
title |
Genetic diversity, structure and gene flow of migratory barren-ground caribou (Rangifer tarandus groenlandicus) in Canada |
title_short |
Genetic diversity, structure and gene flow of migratory barren-ground caribou (Rangifer tarandus groenlandicus) in Canada |
title_full |
Genetic diversity, structure and gene flow of migratory barren-ground caribou (Rangifer tarandus groenlandicus) in Canada |
title_fullStr |
Genetic diversity, structure and gene flow of migratory barren-ground caribou (Rangifer tarandus groenlandicus) in Canada |
title_full_unstemmed |
Genetic diversity, structure and gene flow of migratory barren-ground caribou (Rangifer tarandus groenlandicus) in Canada |
title_sort |
genetic diversity, structure and gene flow of migratory barren-ground caribou (rangifer tarandus groenlandicus) in canada |
publisher |
Septentrio Academic Publishing |
publishDate |
2016 |
url |
https://doi.org/10.7557/2.36.1.3577 https://doaj.org/article/9b0abe44a2d94a468674268d24441f78 |
long_lat |
ENVELOPE(-84.501,-84.501,64.463,64.463) |
geographic |
Arctic Canada Southampton Island |
geographic_facet |
Arctic Canada Southampton Island |
genre |
Arctic caribou Rangifer Rangifer tarandus Sea ice Southampton Island Tundra |
genre_facet |
Arctic caribou Rangifer Rangifer tarandus Sea ice Southampton Island Tundra |
op_source |
Rangifer, Vol 36, Iss 1 (2016) |
op_relation |
https://septentrio.uit.no/index.php/rangifer/article/view/3577 https://doaj.org/toc/1890-6729 doi:10.7557/2.36.1.3577 1890-6729 https://doaj.org/article/9b0abe44a2d94a468674268d24441f78 |
op_doi |
https://doi.org/10.7557/2.36.1.3577 |
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Rangifer |
container_volume |
36 |
container_issue |
1 |
container_start_page |
1 |
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1766332682771365888 |