Against the flow: evidence of multiple recent invasions of warmer continental shelf waters by a Southern Ocean brittle star
The Southern Ocean is anomalously rich in benthos. This biodiversity is native, mostly endemic and perceived to be uniquely threatened from climate- and anthropogenically- mediated invasions. Major international scientific effort throughout the last decade has revealed more connectivity than expecte...
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ftdoajarticles:oai:doaj.org/article:87f4a0d293504a8fa05ea0099f652fd6 2023-05-15T13:34:05+02:00 Against the flow: evidence of multiple recent invasions of warmer continental shelf waters by a Southern Ocean brittle star Chester John Sands Timothy eO'Hara David K. A. Barnes Rafael eMartín-Ledo 2015-06-01T00:00:00Z https://doi.org/10.3389/fevo.2015.00063 https://doaj.org/article/87f4a0d293504a8fa05ea0099f652fd6 EN eng Frontiers Media S.A. http://journal.frontiersin.org/Journal/10.3389/fevo.2015.00063/full https://doaj.org/toc/2296-701X 2296-701X doi:10.3389/fevo.2015.00063 https://doaj.org/article/87f4a0d293504a8fa05ea0099f652fd6 Frontiers in Ecology and Evolution, Vol 3 (2015) Climate Change Phylogeography Radiation adaptation Pleistocene range expansion Evolution QH359-425 Ecology QH540-549.5 article 2015 ftdoajarticles https://doi.org/10.3389/fevo.2015.00063 2022-12-31T09:49:53Z The Southern Ocean is anomalously rich in benthos. This biodiversity is native, mostly endemic and perceived to be uniquely threatened from climate- and anthropogenically- mediated invasions. Major international scientific effort throughout the last decade has revealed more connectivity than expected between fauna north and south of the worlds strongest marine barrier – the Polar Front (the strongest jet of the Antarctic Circumpolar Current). To date though, no research has demonstrated any radiations of marine taxa out from the Southern Ocean, except at abyssal depths (where conditions differ much less). Our phylogeographic investigation of one of the most ubiquitous and abundant clades at high southern latitudes, the ophiuroids (brittlestars), shows that one of them, Ophiura lymani, has gone against the flow. Remarkably our genetic data suggest that O. lymani has successfully invaded the South American shelf from Antarctica at least three times, in recent (Pleistocene) radiation. Many previous studies have demonstrated links within clades across the PF this is the first in which northwards directional movement of a shelf-restricted species is the only convincing explanation. Rapid, recent, regional warming is likely to facilitate multiple range shift invasions into the Southern Ocean, whereas movement of cold adapted fauna (considered highly stenothermal) out of the Antarctic to warmer shelves has, until now, seemed highly unlikely. Article in Journal/Newspaper Antarc* Antarctic Antarctica Southern Ocean Directory of Open Access Journals: DOAJ Articles Antarctic Southern Ocean The Antarctic Frontiers in Ecology and Evolution 3 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Climate Change Phylogeography Radiation adaptation Pleistocene range expansion Evolution QH359-425 Ecology QH540-549.5 |
spellingShingle |
Climate Change Phylogeography Radiation adaptation Pleistocene range expansion Evolution QH359-425 Ecology QH540-549.5 Chester John Sands Timothy eO'Hara David K. A. Barnes Rafael eMartín-Ledo Against the flow: evidence of multiple recent invasions of warmer continental shelf waters by a Southern Ocean brittle star |
topic_facet |
Climate Change Phylogeography Radiation adaptation Pleistocene range expansion Evolution QH359-425 Ecology QH540-549.5 |
description |
The Southern Ocean is anomalously rich in benthos. This biodiversity is native, mostly endemic and perceived to be uniquely threatened from climate- and anthropogenically- mediated invasions. Major international scientific effort throughout the last decade has revealed more connectivity than expected between fauna north and south of the worlds strongest marine barrier – the Polar Front (the strongest jet of the Antarctic Circumpolar Current). To date though, no research has demonstrated any radiations of marine taxa out from the Southern Ocean, except at abyssal depths (where conditions differ much less). Our phylogeographic investigation of one of the most ubiquitous and abundant clades at high southern latitudes, the ophiuroids (brittlestars), shows that one of them, Ophiura lymani, has gone against the flow. Remarkably our genetic data suggest that O. lymani has successfully invaded the South American shelf from Antarctica at least three times, in recent (Pleistocene) radiation. Many previous studies have demonstrated links within clades across the PF this is the first in which northwards directional movement of a shelf-restricted species is the only convincing explanation. Rapid, recent, regional warming is likely to facilitate multiple range shift invasions into the Southern Ocean, whereas movement of cold adapted fauna (considered highly stenothermal) out of the Antarctic to warmer shelves has, until now, seemed highly unlikely. |
format |
Article in Journal/Newspaper |
author |
Chester John Sands Timothy eO'Hara David K. A. Barnes Rafael eMartín-Ledo |
author_facet |
Chester John Sands Timothy eO'Hara David K. A. Barnes Rafael eMartín-Ledo |
author_sort |
Chester John Sands |
title |
Against the flow: evidence of multiple recent invasions of warmer continental shelf waters by a Southern Ocean brittle star |
title_short |
Against the flow: evidence of multiple recent invasions of warmer continental shelf waters by a Southern Ocean brittle star |
title_full |
Against the flow: evidence of multiple recent invasions of warmer continental shelf waters by a Southern Ocean brittle star |
title_fullStr |
Against the flow: evidence of multiple recent invasions of warmer continental shelf waters by a Southern Ocean brittle star |
title_full_unstemmed |
Against the flow: evidence of multiple recent invasions of warmer continental shelf waters by a Southern Ocean brittle star |
title_sort |
against the flow: evidence of multiple recent invasions of warmer continental shelf waters by a southern ocean brittle star |
publisher |
Frontiers Media S.A. |
publishDate |
2015 |
url |
https://doi.org/10.3389/fevo.2015.00063 https://doaj.org/article/87f4a0d293504a8fa05ea0099f652fd6 |
geographic |
Antarctic Southern Ocean The Antarctic |
geographic_facet |
Antarctic Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Antarctica Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica Southern Ocean |
op_source |
Frontiers in Ecology and Evolution, Vol 3 (2015) |
op_relation |
http://journal.frontiersin.org/Journal/10.3389/fevo.2015.00063/full https://doaj.org/toc/2296-701X 2296-701X doi:10.3389/fevo.2015.00063 https://doaj.org/article/87f4a0d293504a8fa05ea0099f652fd6 |
op_doi |
https://doi.org/10.3389/fevo.2015.00063 |
container_title |
Frontiers in Ecology and Evolution |
container_volume |
3 |
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1766048800291422208 |