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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ftdoajarticles:oai:doaj.org/article:7103b89e749e4dd996dda972f60b90a9 2023-05-15T13:43:54+02:00 Genetic signature of Last Glacial Maximum regional refugia in a circum-Antarctic sea spider Anna Soler-Membrives Katrin Linse Karen J. Miller Claudia P. Arango 2017-01-01T00:00:00Z https://doi.org/10.1098/rsos.170615 https://doaj.org/article/7103b89e749e4dd996dda972f60b90a9 EN eng The Royal Society https://royalsocietypublishing.org/doi/pdf/10.1098/rsos.170615 https://doaj.org/toc/2054-5703 2054-5703 doi:10.1098/rsos.170615 https://doaj.org/article/7103b89e749e4dd996dda972f60b90a9 Royal Society Open Science, Vol 4, Iss 10 (2017) nymphon australe phylogeography southern ocean dna barcoding population structure Science Q article 2017 ftdoajarticles https://doi.org/10.1098/rsos.170615 2022-12-31T13:29:45Z 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. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Southern Ocean Weddell Sea Directory of Open Access Journals: DOAJ Articles Antarctic Southern Ocean The Antarctic Antarctic Peninsula Weddell Sea Weddell Royal Society Open Science 4 10 170615 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
nymphon australe phylogeography southern ocean dna barcoding population structure Science Q |
spellingShingle |
nymphon australe phylogeography southern ocean dna barcoding population structure Science Q Anna Soler-Membrives Katrin Linse Karen J. Miller Claudia P. Arango Genetic signature of Last Glacial Maximum regional refugia in a circum-Antarctic sea spider |
topic_facet |
nymphon australe phylogeography southern ocean dna barcoding population structure Science Q |
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 |
Article in Journal/Newspaper |
author |
Anna Soler-Membrives Katrin Linse Karen J. Miller Claudia P. Arango |
author_facet |
Anna Soler-Membrives Katrin Linse Karen J. Miller Claudia P. Arango |
author_sort |
Anna Soler-Membrives |
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 |
publishDate |
2017 |
url |
https://doi.org/10.1098/rsos.170615 https://doaj.org/article/7103b89e749e4dd996dda972f60b90a9 |
geographic |
Antarctic Southern Ocean The Antarctic Antarctic Peninsula Weddell Sea Weddell |
geographic_facet |
Antarctic Southern Ocean The Antarctic Antarctic Peninsula Weddell Sea Weddell |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Southern Ocean Weddell Sea |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Southern Ocean Weddell Sea |
op_source |
Royal Society Open Science, Vol 4, Iss 10 (2017) |
op_relation |
https://royalsocietypublishing.org/doi/pdf/10.1098/rsos.170615 https://doaj.org/toc/2054-5703 2054-5703 doi:10.1098/rsos.170615 https://doaj.org/article/7103b89e749e4dd996dda972f60b90a9 |
op_doi |
https://doi.org/10.1098/rsos.170615 |
container_title |
Royal Society Open Science |
container_volume |
4 |
container_issue |
10 |
container_start_page |
170615 |
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1766194885758550016 |