Geographic structure in the Southern Ocean circumpolar brittle star Ophionotus victoriae (Ophiuridae) revealed from mt DNA and single‐nucleotide polymorphism data
Abstract Marine systems have traditionally been thought of as “open” with few barriers to gene flow. In particular, many marine organisms in the Southern Ocean purportedly possess circumpolar distributions that have rarely been well verified. Here, we use the highly abundant and endemic Southern Oce...
Published in: | Ecology and Evolution |
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Online Access: | http://dx.doi.org/10.1002/ece3.2617 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fece3.2617 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ece3.2617 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/ece3.2617 http://api.wiley.com/onlinelibrary/chorus/v1/articles/10.1002%2Fece3.2617 |
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crwiley:10.1002/ece3.2617 2024-06-02T07:58:21+00:00 Geographic structure in the Southern Ocean circumpolar brittle star Ophionotus victoriae (Ophiuridae) revealed from mt DNA and single‐nucleotide polymorphism data Galaska, Matthew P. Sands, Chester J. Santos, Scott R. Mahon, Andrew R. Halanych, Kenneth M. Office of Polar Programs Division of Antarctic Sciences National Science Foundation British Antarctic Survey 2016 http://dx.doi.org/10.1002/ece3.2617 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fece3.2617 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ece3.2617 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/ece3.2617 http://api.wiley.com/onlinelibrary/chorus/v1/articles/10.1002%2Fece3.2617 en eng Wiley http://creativecommons.org/licenses/by/4.0/ http://creativecommons.org/licenses/by/4.0/ Ecology and Evolution volume 7, issue 2, page 475-485 ISSN 2045-7758 2045-7758 journal-article 2016 crwiley https://doi.org/10.1002/ece3.2617 2024-05-03T11:32:26Z Abstract Marine systems have traditionally been thought of as “open” with few barriers to gene flow. In particular, many marine organisms in the Southern Ocean purportedly possess circumpolar distributions that have rarely been well verified. Here, we use the highly abundant and endemic Southern Ocean brittle star Ophionotus victoriae to examine genetic structure and determine whether barriers to gene flow have existed around the Antarctic continent. Ophionotus victoriae possesses feeding planktotrophic larvae with presumed high dispersal capability, but a previous study revealed genetic structure along the Antarctic Peninsula. To test the extent of genetic differentiation within O. victoriae , we sampled from the Ross Sea through the eastern Weddell Sea. Whereas two mitochondrial DNA markers (16S rDNA and COI ) were employed to allow comparison to earlier work, a 2b‐ RAD single‐nucleotide polymorphism ( SNP ) approach allowed sampling of loci across the genome. Mitochondrial data from 414 individuals suggested three major lineages, but 2b‐ RAD data generated 1,999 biallelic loci that identified four geographically distinct groups from 89 samples. Given the greater resolution by SNP data, O. victoriae can be divided into geographically distinct populations likely representing multiple species. Specific historical scenarios that explain current population structure were examined with approximate Bayesian computation ( ABC ) analyses. Although the Bransfield Strait region shows high diversity possibly due to mixing, our results suggest that within the recent past, dispersal processes due to strong currents such as the Antarctic Circumpolar Current have not overcome genetic subdivision presumably due to historical isolation, questioning the idea of large open circumpolar populations in the Southern Ocean. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Bransfield Strait Ross Sea Southern Ocean Weddell Sea Wiley Online Library Antarctic Antarctic Peninsula Bransfield Strait Ross Sea Southern Ocean The Antarctic Weddell Weddell Sea Ecology and Evolution 7 2 475 485 |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract Marine systems have traditionally been thought of as “open” with few barriers to gene flow. In particular, many marine organisms in the Southern Ocean purportedly possess circumpolar distributions that have rarely been well verified. Here, we use the highly abundant and endemic Southern Ocean brittle star Ophionotus victoriae to examine genetic structure and determine whether barriers to gene flow have existed around the Antarctic continent. Ophionotus victoriae possesses feeding planktotrophic larvae with presumed high dispersal capability, but a previous study revealed genetic structure along the Antarctic Peninsula. To test the extent of genetic differentiation within O. victoriae , we sampled from the Ross Sea through the eastern Weddell Sea. Whereas two mitochondrial DNA markers (16S rDNA and COI ) were employed to allow comparison to earlier work, a 2b‐ RAD single‐nucleotide polymorphism ( SNP ) approach allowed sampling of loci across the genome. Mitochondrial data from 414 individuals suggested three major lineages, but 2b‐ RAD data generated 1,999 biallelic loci that identified four geographically distinct groups from 89 samples. Given the greater resolution by SNP data, O. victoriae can be divided into geographically distinct populations likely representing multiple species. Specific historical scenarios that explain current population structure were examined with approximate Bayesian computation ( ABC ) analyses. Although the Bransfield Strait region shows high diversity possibly due to mixing, our results suggest that within the recent past, dispersal processes due to strong currents such as the Antarctic Circumpolar Current have not overcome genetic subdivision presumably due to historical isolation, questioning the idea of large open circumpolar populations in the Southern Ocean. |
author2 |
Office of Polar Programs Division of Antarctic Sciences National Science Foundation British Antarctic Survey |
format |
Article in Journal/Newspaper |
author |
Galaska, Matthew P. Sands, Chester J. Santos, Scott R. Mahon, Andrew R. Halanych, Kenneth M. |
spellingShingle |
Galaska, Matthew P. Sands, Chester J. Santos, Scott R. Mahon, Andrew R. Halanych, Kenneth M. Geographic structure in the Southern Ocean circumpolar brittle star Ophionotus victoriae (Ophiuridae) revealed from mt DNA and single‐nucleotide polymorphism data |
author_facet |
Galaska, Matthew P. Sands, Chester J. Santos, Scott R. Mahon, Andrew R. Halanych, Kenneth M. |
author_sort |
Galaska, Matthew P. |
title |
Geographic structure in the Southern Ocean circumpolar brittle star Ophionotus victoriae (Ophiuridae) revealed from mt DNA and single‐nucleotide polymorphism data |
title_short |
Geographic structure in the Southern Ocean circumpolar brittle star Ophionotus victoriae (Ophiuridae) revealed from mt DNA and single‐nucleotide polymorphism data |
title_full |
Geographic structure in the Southern Ocean circumpolar brittle star Ophionotus victoriae (Ophiuridae) revealed from mt DNA and single‐nucleotide polymorphism data |
title_fullStr |
Geographic structure in the Southern Ocean circumpolar brittle star Ophionotus victoriae (Ophiuridae) revealed from mt DNA and single‐nucleotide polymorphism data |
title_full_unstemmed |
Geographic structure in the Southern Ocean circumpolar brittle star Ophionotus victoriae (Ophiuridae) revealed from mt DNA and single‐nucleotide polymorphism data |
title_sort |
geographic structure in the southern ocean circumpolar brittle star ophionotus victoriae (ophiuridae) revealed from mt dna and single‐nucleotide polymorphism data |
publisher |
Wiley |
publishDate |
2016 |
url |
http://dx.doi.org/10.1002/ece3.2617 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fece3.2617 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ece3.2617 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/ece3.2617 http://api.wiley.com/onlinelibrary/chorus/v1/articles/10.1002%2Fece3.2617 |
geographic |
Antarctic Antarctic Peninsula Bransfield Strait Ross Sea Southern Ocean The Antarctic Weddell Weddell Sea |
geographic_facet |
Antarctic Antarctic Peninsula Bransfield Strait Ross Sea Southern Ocean The Antarctic Weddell Weddell Sea |
genre |
Antarc* Antarctic Antarctic Peninsula Bransfield Strait Ross Sea Southern Ocean Weddell Sea |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Bransfield Strait Ross Sea Southern Ocean Weddell Sea |
op_source |
Ecology and Evolution volume 7, issue 2, page 475-485 ISSN 2045-7758 2045-7758 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1002/ece3.2617 |
container_title |
Ecology and Evolution |
container_volume |
7 |
container_issue |
2 |
container_start_page |
475 |
op_container_end_page |
485 |
_version_ |
1800741675869405184 |