Demographic mechanisms underpinning genetic assimilation of remnant groups of a large carnivore
Current range expansions of large terrestrial carnivores are occurring following human-induced range contraction. Contractions are often incomplete, leaving small remnant groups in refugia throughout the former range. Little is known about the underlying ecological and evolutionary processes that in...
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ftpubmed:oai:pubmedcentral.nih.gov:5046903 2023-05-15T18:42:05+02:00 Demographic mechanisms underpinning genetic assimilation of remnant groups of a large carnivore Mikle, Nate Graves, Tabitha A. Kovach, Ryan Kendall, Katherine C. Macleod, Amy C. 2016-09-28 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5046903/ http://www.ncbi.nlm.nih.gov/pubmed/27655768 https://doi.org/10.1098/rspb.2016.1467 en eng The Royal Society http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5046903/ http://www.ncbi.nlm.nih.gov/pubmed/27655768 http://dx.doi.org/10.1098/rspb.2016.1467 © 2016 The Author(s) http://royalsocietypublishing.org/licence Published by the Royal Society. All rights reserved. Research Articles Text 2016 ftpubmed https://doi.org/10.1098/rspb.2016.1467 2017-10-01T00:01:49Z Current range expansions of large terrestrial carnivores are occurring following human-induced range contraction. Contractions are often incomplete, leaving small remnant groups in refugia throughout the former range. Little is known about the underlying ecological and evolutionary processes that influence how remnant groups are affected during range expansion. We used data from a spatially explicit, long-term genetic sampling effort of grizzly bears (Ursus arctos) in the Northern Continental Divide Ecosystem (NCDE), USA, to identify the demographic processes underlying spatial and temporal patterns of genetic diversity. We conducted parentage analysis to evaluate how reproductive success and dispersal contribute to spatio-temporal patterns of genetic diversity in remnant groups of grizzly bears existing in the southwestern (SW), southeastern (SE) and east-central (EC) regions of the NCDE. A few reproductively dominant individuals and local inbreeding caused low genetic diversity in peripheral regions that may have persisted for multiple generations before eroding rapidly (approx. one generation) during population expansion. Our results highlight that individual-level genetic and reproductive dynamics play critical roles during genetic assimilation, and show that spatial patterns of genetic diversity on the leading edge of an expansion may result from historical demographic patterns that are highly ephemeral. Text Ursus arctos PubMed Central (PMC) Proceedings of the Royal Society B: Biological Sciences 283 1839 20161467 |
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Research Articles |
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Research Articles Mikle, Nate Graves, Tabitha A. Kovach, Ryan Kendall, Katherine C. Macleod, Amy C. Demographic mechanisms underpinning genetic assimilation of remnant groups of a large carnivore |
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Research Articles |
description |
Current range expansions of large terrestrial carnivores are occurring following human-induced range contraction. Contractions are often incomplete, leaving small remnant groups in refugia throughout the former range. Little is known about the underlying ecological and evolutionary processes that influence how remnant groups are affected during range expansion. We used data from a spatially explicit, long-term genetic sampling effort of grizzly bears (Ursus arctos) in the Northern Continental Divide Ecosystem (NCDE), USA, to identify the demographic processes underlying spatial and temporal patterns of genetic diversity. We conducted parentage analysis to evaluate how reproductive success and dispersal contribute to spatio-temporal patterns of genetic diversity in remnant groups of grizzly bears existing in the southwestern (SW), southeastern (SE) and east-central (EC) regions of the NCDE. A few reproductively dominant individuals and local inbreeding caused low genetic diversity in peripheral regions that may have persisted for multiple generations before eroding rapidly (approx. one generation) during population expansion. Our results highlight that individual-level genetic and reproductive dynamics play critical roles during genetic assimilation, and show that spatial patterns of genetic diversity on the leading edge of an expansion may result from historical demographic patterns that are highly ephemeral. |
format |
Text |
author |
Mikle, Nate Graves, Tabitha A. Kovach, Ryan Kendall, Katherine C. Macleod, Amy C. |
author_facet |
Mikle, Nate Graves, Tabitha A. Kovach, Ryan Kendall, Katherine C. Macleod, Amy C. |
author_sort |
Mikle, Nate |
title |
Demographic mechanisms underpinning genetic assimilation of remnant groups of a large carnivore |
title_short |
Demographic mechanisms underpinning genetic assimilation of remnant groups of a large carnivore |
title_full |
Demographic mechanisms underpinning genetic assimilation of remnant groups of a large carnivore |
title_fullStr |
Demographic mechanisms underpinning genetic assimilation of remnant groups of a large carnivore |
title_full_unstemmed |
Demographic mechanisms underpinning genetic assimilation of remnant groups of a large carnivore |
title_sort |
demographic mechanisms underpinning genetic assimilation of remnant groups of a large carnivore |
publisher |
The Royal Society |
publishDate |
2016 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5046903/ http://www.ncbi.nlm.nih.gov/pubmed/27655768 https://doi.org/10.1098/rspb.2016.1467 |
genre |
Ursus arctos |
genre_facet |
Ursus arctos |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5046903/ http://www.ncbi.nlm.nih.gov/pubmed/27655768 http://dx.doi.org/10.1098/rspb.2016.1467 |
op_rights |
© 2016 The Author(s) http://royalsocietypublishing.org/licence Published by the Royal Society. All rights reserved. |
op_doi |
https://doi.org/10.1098/rspb.2016.1467 |
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Proceedings of the Royal Society B: Biological Sciences |
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283 |
container_issue |
1839 |
container_start_page |
20161467 |
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1766231691449335808 |