Phylogeography of the Patagonian otter Lontra provocax : adaptive divergence to marine habitat or signature of southern glacial refugia?
Abstract Background A number of studies have described the extension of ice cover in western Patagonia during the Last Glacial Maximum, providing evidence of a complete cover of terrestrial habitat from 41°S to 56°S and two main refugia, one in south-eastern Tierra del Fuego and the other north of t...
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ftdoajarticles:oai:doaj.org/article:8795e7dc41974a2b89369ed4ff8fb6f6 2023-05-15T16:41:11+02:00 Phylogeography of the Patagonian otter Lontra provocax : adaptive divergence to marine habitat or signature of southern glacial refugia? Chehébar Claudio Medina-Vogel Gonzalo Vianna Juliana A Sielfeld Walter Olavarría Carlos Faugeron Sylvain 2011-02-01T00:00:00Z https://doi.org/10.1186/1471-2148-11-53 https://doaj.org/article/8795e7dc41974a2b89369ed4ff8fb6f6 EN eng BMC http://www.biomedcentral.com/1471-2148/11/53 https://doaj.org/toc/1471-2148 doi:10.1186/1471-2148-11-53 1471-2148 https://doaj.org/article/8795e7dc41974a2b89369ed4ff8fb6f6 BMC Evolutionary Biology, Vol 11, Iss 1, p 53 (2011) Evolution QH359-425 article 2011 ftdoajarticles https://doi.org/10.1186/1471-2148-11-53 2022-12-30T20:14:42Z Abstract Background A number of studies have described the extension of ice cover in western Patagonia during the Last Glacial Maximum, providing evidence of a complete cover of terrestrial habitat from 41°S to 56°S and two main refugia, one in south-eastern Tierra del Fuego and the other north of the Chiloé Island. However, recent evidence of high genetic diversity in Patagonian river species suggests the existence of aquatic refugia in this region. Here, we further test this hypothesis based on phylogeographic inferences from a semi-aquatic species that is a top predator of river and marine fauna, the huillín or Southern river otter ( Lontra provocax ). Results We examined mtDNA sequences of the control region, ND5 and Cytochrome-b (2151 bp in total) in 75 samples of L. provocax from 21 locations in river and marine habitats. Phylogenetic analysis illustrates two main divergent clades for L. provocax in continental freshwater habitat. A highly diverse clade was represented by haplotypes from the marine habitat of the Southern Fjords and Channels (SFC) region (43°38' to 53°08'S), whereas only one of these haplotypes was paraphyletic and associated with northern river haplotypes. Conclusions Our data support the hypothesis of the persistence of L. provocax in western Patagonia, south of the ice sheet limit, during last glacial maximum (41°S latitude). This limit also corresponds to a strong environmental change, which might have spurred L. provocax differentiation between the two environments. Article in Journal/Newspaper Ice Sheet Lontra Tierra del Fuego Directory of Open Access Journals: DOAJ Articles Patagonia Chiloé ENVELOPE(-63.983,-63.983,-65.517,-65.517) BMC Evolutionary Biology 11 1 |
institution |
Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Evolution QH359-425 |
spellingShingle |
Evolution QH359-425 Chehébar Claudio Medina-Vogel Gonzalo Vianna Juliana A Sielfeld Walter Olavarría Carlos Faugeron Sylvain Phylogeography of the Patagonian otter Lontra provocax : adaptive divergence to marine habitat or signature of southern glacial refugia? |
topic_facet |
Evolution QH359-425 |
description |
Abstract Background A number of studies have described the extension of ice cover in western Patagonia during the Last Glacial Maximum, providing evidence of a complete cover of terrestrial habitat from 41°S to 56°S and two main refugia, one in south-eastern Tierra del Fuego and the other north of the Chiloé Island. However, recent evidence of high genetic diversity in Patagonian river species suggests the existence of aquatic refugia in this region. Here, we further test this hypothesis based on phylogeographic inferences from a semi-aquatic species that is a top predator of river and marine fauna, the huillín or Southern river otter ( Lontra provocax ). Results We examined mtDNA sequences of the control region, ND5 and Cytochrome-b (2151 bp in total) in 75 samples of L. provocax from 21 locations in river and marine habitats. Phylogenetic analysis illustrates two main divergent clades for L. provocax in continental freshwater habitat. A highly diverse clade was represented by haplotypes from the marine habitat of the Southern Fjords and Channels (SFC) region (43°38' to 53°08'S), whereas only one of these haplotypes was paraphyletic and associated with northern river haplotypes. Conclusions Our data support the hypothesis of the persistence of L. provocax in western Patagonia, south of the ice sheet limit, during last glacial maximum (41°S latitude). This limit also corresponds to a strong environmental change, which might have spurred L. provocax differentiation between the two environments. |
format |
Article in Journal/Newspaper |
author |
Chehébar Claudio Medina-Vogel Gonzalo Vianna Juliana A Sielfeld Walter Olavarría Carlos Faugeron Sylvain |
author_facet |
Chehébar Claudio Medina-Vogel Gonzalo Vianna Juliana A Sielfeld Walter Olavarría Carlos Faugeron Sylvain |
author_sort |
Chehébar Claudio |
title |
Phylogeography of the Patagonian otter Lontra provocax : adaptive divergence to marine habitat or signature of southern glacial refugia? |
title_short |
Phylogeography of the Patagonian otter Lontra provocax : adaptive divergence to marine habitat or signature of southern glacial refugia? |
title_full |
Phylogeography of the Patagonian otter Lontra provocax : adaptive divergence to marine habitat or signature of southern glacial refugia? |
title_fullStr |
Phylogeography of the Patagonian otter Lontra provocax : adaptive divergence to marine habitat or signature of southern glacial refugia? |
title_full_unstemmed |
Phylogeography of the Patagonian otter Lontra provocax : adaptive divergence to marine habitat or signature of southern glacial refugia? |
title_sort |
phylogeography of the patagonian otter lontra provocax : adaptive divergence to marine habitat or signature of southern glacial refugia? |
publisher |
BMC |
publishDate |
2011 |
url |
https://doi.org/10.1186/1471-2148-11-53 https://doaj.org/article/8795e7dc41974a2b89369ed4ff8fb6f6 |
long_lat |
ENVELOPE(-63.983,-63.983,-65.517,-65.517) |
geographic |
Patagonia Chiloé |
geographic_facet |
Patagonia Chiloé |
genre |
Ice Sheet Lontra Tierra del Fuego |
genre_facet |
Ice Sheet Lontra Tierra del Fuego |
op_source |
BMC Evolutionary Biology, Vol 11, Iss 1, p 53 (2011) |
op_relation |
http://www.biomedcentral.com/1471-2148/11/53 https://doaj.org/toc/1471-2148 doi:10.1186/1471-2148-11-53 1471-2148 https://doaj.org/article/8795e7dc41974a2b89369ed4ff8fb6f6 |
op_doi |
https://doi.org/10.1186/1471-2148-11-53 |
container_title |
BMC Evolutionary Biology |
container_volume |
11 |
container_issue |
1 |
_version_ |
1766031615304138752 |