Paths for colonization or exodus? New insights from the brown bear (Ursus arctos) population of the Cantabrian Mountains
Over the centuries, the geographical distribution of brown bear (Ursus arctos) across the Iberian Peninsula has been decreasing, with the species currently confined to North Iberia. The Cantabrian brown bear population is one of the smallest in Europe and is structured into two subpopulations, posit...
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ftpubmed:oai:pubmedcentral.nih.gov:6996475 2023-05-15T18:42:00+02:00 Paths for colonization or exodus? New insights from the brown bear (Ursus arctos) population of the Cantabrian Mountains Gregório, Inês Barros, Tânia Pando, Doriana Morante, Joaquín Fonseca, Carlos Ferreira, Eduardo 2020-01-31 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6996475/ http://www.ncbi.nlm.nih.gov/pubmed/32004321 https://doi.org/10.1371/journal.pone.0227302 en eng Public Library of Science http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6996475/ http://www.ncbi.nlm.nih.gov/pubmed/32004321 http://dx.doi.org/10.1371/journal.pone.0227302 © 2020 Gregório et al http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. CC-BY Research Article Text 2020 ftpubmed https://doi.org/10.1371/journal.pone.0227302 2020-02-23T01:16:04Z Over the centuries, the geographical distribution of brown bear (Ursus arctos) across the Iberian Peninsula has been decreasing, with the species currently confined to North Iberia. The Cantabrian brown bear population is one of the smallest in Europe and is structured into two subpopulations, positioned along an east-west axis. Given the current critically endangered status of this population, it is essential to have a clear picture of its within-population genetic patterns and processes. We use a set of three molecular markers (mitochondrial DNA, autosomal microsatellites and sex markers) to clarify the genetic origins and assess the migration patterns and gene flow of the Cantabrian brown bear population. Our results reveal the presence of two different mitochondrial (matrilineal) haplotypes in the Cantabrian population, both belonging to European brown bear clade 1a. The two haplotypes are geographically structured between Eastern (haplotype CanE) and Western Cantabrian (haplotype CanW) subpopulations, which is consistent with the genetic structure previously identified using nuclear markers. Additionally, we show that CanE is closer to the historical Pyrenean (Pyr) haplotype than to CanW. Despite strong structuring at the levels of mtDNA and nuclear loci, there is evidence of bidirectional gene flow and admixture among subpopulations. Gene flow is asymmetrical and significantly more intense from the Eastern to the Western Cantabrian subpopulation. In fact, we only detected first generation male migrants from the Eastern to the Western Cantabrian subpopulation. These results suggest more intense migration from the smaller and more vulnerable Eastern Cantabrian subpopulation towards the larger and more stable Western Cantabrian subpopulation. These new insights are relevant for assessments of on-going conservation measures, namely the role of dispersal corridors and enhanced connectivity. We discuss the importance of complementary conservation measures, such as human-wildlife conflict mitigation and habitat ... Text Ursus arctos PubMed Central (PMC) PLOS ONE 15 1 e0227302 |
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Research Article Gregório, Inês Barros, Tânia Pando, Doriana Morante, Joaquín Fonseca, Carlos Ferreira, Eduardo Paths for colonization or exodus? New insights from the brown bear (Ursus arctos) population of the Cantabrian Mountains |
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Research Article |
description |
Over the centuries, the geographical distribution of brown bear (Ursus arctos) across the Iberian Peninsula has been decreasing, with the species currently confined to North Iberia. The Cantabrian brown bear population is one of the smallest in Europe and is structured into two subpopulations, positioned along an east-west axis. Given the current critically endangered status of this population, it is essential to have a clear picture of its within-population genetic patterns and processes. We use a set of three molecular markers (mitochondrial DNA, autosomal microsatellites and sex markers) to clarify the genetic origins and assess the migration patterns and gene flow of the Cantabrian brown bear population. Our results reveal the presence of two different mitochondrial (matrilineal) haplotypes in the Cantabrian population, both belonging to European brown bear clade 1a. The two haplotypes are geographically structured between Eastern (haplotype CanE) and Western Cantabrian (haplotype CanW) subpopulations, which is consistent with the genetic structure previously identified using nuclear markers. Additionally, we show that CanE is closer to the historical Pyrenean (Pyr) haplotype than to CanW. Despite strong structuring at the levels of mtDNA and nuclear loci, there is evidence of bidirectional gene flow and admixture among subpopulations. Gene flow is asymmetrical and significantly more intense from the Eastern to the Western Cantabrian subpopulation. In fact, we only detected first generation male migrants from the Eastern to the Western Cantabrian subpopulation. These results suggest more intense migration from the smaller and more vulnerable Eastern Cantabrian subpopulation towards the larger and more stable Western Cantabrian subpopulation. These new insights are relevant for assessments of on-going conservation measures, namely the role of dispersal corridors and enhanced connectivity. We discuss the importance of complementary conservation measures, such as human-wildlife conflict mitigation and habitat ... |
format |
Text |
author |
Gregório, Inês Barros, Tânia Pando, Doriana Morante, Joaquín Fonseca, Carlos Ferreira, Eduardo |
author_facet |
Gregório, Inês Barros, Tânia Pando, Doriana Morante, Joaquín Fonseca, Carlos Ferreira, Eduardo |
author_sort |
Gregório, Inês |
title |
Paths for colonization or exodus? New insights from the brown bear (Ursus arctos) population of the Cantabrian Mountains |
title_short |
Paths for colonization or exodus? New insights from the brown bear (Ursus arctos) population of the Cantabrian Mountains |
title_full |
Paths for colonization or exodus? New insights from the brown bear (Ursus arctos) population of the Cantabrian Mountains |
title_fullStr |
Paths for colonization or exodus? New insights from the brown bear (Ursus arctos) population of the Cantabrian Mountains |
title_full_unstemmed |
Paths for colonization or exodus? New insights from the brown bear (Ursus arctos) population of the Cantabrian Mountains |
title_sort |
paths for colonization or exodus? new insights from the brown bear (ursus arctos) population of the cantabrian mountains |
publisher |
Public Library of Science |
publishDate |
2020 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6996475/ http://www.ncbi.nlm.nih.gov/pubmed/32004321 https://doi.org/10.1371/journal.pone.0227302 |
genre |
Ursus arctos |
genre_facet |
Ursus arctos |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6996475/ http://www.ncbi.nlm.nih.gov/pubmed/32004321 http://dx.doi.org/10.1371/journal.pone.0227302 |
op_rights |
© 2020 Gregório et al http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1371/journal.pone.0227302 |
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PLOS ONE |
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15 |
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1 |
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e0227302 |
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1766231591708786688 |