Genetic signature of Last Glacial Maximum regional refugia in a circum-Antarctic sea spider
The evolutionary history of Antarctic organisms is becoming increasingly important to understand and manage population trajectories under rapid environmental change. The Antarctic sea spider Nymphon australe, with an apparently large population size compared with other sea spider species, is an idea...
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ftpubmed:oai:pubmedcentral.nih.gov:5666255 2023-05-15T13:36:40+02:00 Genetic signature of Last Glacial Maximum regional refugia in a circum-Antarctic sea spider Soler-Membrives, Anna Linse, Katrin Miller, Karen J. Arango, Claudia P. 2017-10-18 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5666255/ http://www.ncbi.nlm.nih.gov/pubmed/29134072 https://doi.org/10.1098/rsos.170615 en eng The Royal Society Publishing http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5666255/ http://www.ncbi.nlm.nih.gov/pubmed/29134072 http://dx.doi.org/10.1098/rsos.170615 © 2017 The Authors. http://creativecommons.org/licenses/by/4.0/ Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited. CC-BY Biology (Whole Organism) Text 2017 ftpubmed https://doi.org/10.1098/rsos.170615 2017-11-19T01:09:15Z The evolutionary history of Antarctic organisms is becoming increasingly important to understand and manage population trajectories under rapid environmental change. The Antarctic sea spider Nymphon australe, with an apparently large population size compared with other sea spider species, is an ideal target to look for molecular signatures of past climatic events. We analysed mitochondrial DNA of specimens collected from the Antarctic continent and two Antarctic islands (AI) to infer past population processes and understand current genetic structure. Demographic history analyses suggest populations survived in refugia during the Last Glacial Maximum. The high genetic diversity found in the Antarctic Peninsula and East Antarctic (EA) seems related to multiple demographic contraction–expansion events associated with deep-sea refugia, while the low genetic diversity in the Weddell Sea points to a more recent expansion from a shelf refugium. We suggest the genetic structure of N. australe from AI reflects recent colonization from the continent. At a local level, EA populations reveal generally low genetic differentiation, geographically and bathymetrically, suggesting limited restrictions to dispersal. Results highlight regional differences in demographic histories and how these relate to the variation in intensity of glaciation–deglaciation events around Antarctica, critical for the study of local evolutionary processes. These are valuable data for understanding the remarkable success of Antarctic pycnogonids, and how environmental changes have shaped the evolution and diversification of Southern Ocean benthic biodiversity. Text Antarc* Antarctic Antarctic Peninsula Antarctica Southern Ocean Weddell Sea PubMed Central (PMC) Antarctic Antarctic Peninsula Southern Ocean The Antarctic Weddell Weddell Sea Royal Society Open Science 4 10 170615 |
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English |
topic |
Biology (Whole Organism) |
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Biology (Whole Organism) Soler-Membrives, Anna Linse, Katrin Miller, Karen J. Arango, Claudia P. Genetic signature of Last Glacial Maximum regional refugia in a circum-Antarctic sea spider |
topic_facet |
Biology (Whole Organism) |
description |
The evolutionary history of Antarctic organisms is becoming increasingly important to understand and manage population trajectories under rapid environmental change. The Antarctic sea spider Nymphon australe, with an apparently large population size compared with other sea spider species, is an ideal target to look for molecular signatures of past climatic events. We analysed mitochondrial DNA of specimens collected from the Antarctic continent and two Antarctic islands (AI) to infer past population processes and understand current genetic structure. Demographic history analyses suggest populations survived in refugia during the Last Glacial Maximum. The high genetic diversity found in the Antarctic Peninsula and East Antarctic (EA) seems related to multiple demographic contraction–expansion events associated with deep-sea refugia, while the low genetic diversity in the Weddell Sea points to a more recent expansion from a shelf refugium. We suggest the genetic structure of N. australe from AI reflects recent colonization from the continent. At a local level, EA populations reveal generally low genetic differentiation, geographically and bathymetrically, suggesting limited restrictions to dispersal. Results highlight regional differences in demographic histories and how these relate to the variation in intensity of glaciation–deglaciation events around Antarctica, critical for the study of local evolutionary processes. These are valuable data for understanding the remarkable success of Antarctic pycnogonids, and how environmental changes have shaped the evolution and diversification of Southern Ocean benthic biodiversity. |
format |
Text |
author |
Soler-Membrives, Anna Linse, Katrin Miller, Karen J. Arango, Claudia P. |
author_facet |
Soler-Membrives, Anna Linse, Katrin Miller, Karen J. Arango, Claudia P. |
author_sort |
Soler-Membrives, Anna |
title |
Genetic signature of Last Glacial Maximum regional refugia in a circum-Antarctic sea spider |
title_short |
Genetic signature of Last Glacial Maximum regional refugia in a circum-Antarctic sea spider |
title_full |
Genetic signature of Last Glacial Maximum regional refugia in a circum-Antarctic sea spider |
title_fullStr |
Genetic signature of Last Glacial Maximum regional refugia in a circum-Antarctic sea spider |
title_full_unstemmed |
Genetic signature of Last Glacial Maximum regional refugia in a circum-Antarctic sea spider |
title_sort |
genetic signature of last glacial maximum regional refugia in a circum-antarctic sea spider |
publisher |
The Royal Society Publishing |
publishDate |
2017 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5666255/ http://www.ncbi.nlm.nih.gov/pubmed/29134072 https://doi.org/10.1098/rsos.170615 |
geographic |
Antarctic Antarctic Peninsula Southern Ocean The Antarctic Weddell Weddell Sea |
geographic_facet |
Antarctic Antarctic Peninsula Southern Ocean The Antarctic Weddell Weddell Sea |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Southern Ocean Weddell Sea |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Southern Ocean Weddell Sea |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5666255/ http://www.ncbi.nlm.nih.gov/pubmed/29134072 http://dx.doi.org/10.1098/rsos.170615 |
op_rights |
© 2017 The Authors. http://creativecommons.org/licenses/by/4.0/ Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited. |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1098/rsos.170615 |
container_title |
Royal Society Open Science |
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4 |
container_issue |
10 |
container_start_page |
170615 |
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1766082263133454336 |