Comparative marine biodiversity and depth zonation in the Southern Ocean: evidence from a new large polychaete dataset from Scotia and Amundsen seas
Based on a dataset of 16,991 and 307 morphospecies of polychaete worms collected from 58 epibenthic sledge deployments across the Scotia and Amundsen Seas, we show that the structures of their shelf, deep-shelf and slope communities are composed of distinct polychaete assemblages spanning regions wi...
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ftunivtasmania:oai:eprints.utas.edu.au:37523 2023-05-15T13:23:42+02:00 Comparative marine biodiversity and depth zonation in the Southern Ocean: evidence from a new large polychaete dataset from Scotia and Amundsen seas Neal, L Linse, K Brasier, MJ Sherlock, E Glover, AG 2018 application/pdf https://eprints.utas.edu.au/37523/ https://eprints.utas.edu.au/37523/1/146247%20-%20Comparative%20marine%20biodiversity%20and%20depth%20zonation.pdf en eng Springer https://eprints.utas.edu.au/37523/1/146247%20-%20Comparative%20marine%20biodiversity%20and%20depth%20zonation.pdf Neal, L, Linse, K, Brasier, MJ orcid:0000-0003-2844-655X , Sherlock, E and Glover, AG 2018 , 'Comparative marine biodiversity and depth zonation in the Southern Ocean: evidence from a new large polychaete dataset from Scotia and Amundsen seas' , Marine Biodiversity, vol. 48 , 581–601 , doi:10.1007/s12526-017-0735-y <http://dx.doi.org/10.1007/s12526-017-0735-y>. Antarctica Southern Ocean Amundsen Sea Scotia Sea Annelida Polychaeta taxonomy deep sea depth zonation Article PeerReviewed 2018 ftunivtasmania https://doi.org/10.1007/s12526-017-0735-y 2021-09-27T22:16:37Z Based on a dataset of 16,991 and 307 morphospecies of polychaete worms collected from 58 epibenthic sledge deployments across the Scotia and Amundsen Seas, we show that the structures of their shelf, deep-shelf and slope communities are composed of distinct polychaete assemblages spanning regions with “high”, “intermediate”, and “low” biodiversity. Depth has been identified as the main factor structuring the polychaete communities in both seas, countering the prevalent notion of extended eurybathy of the Southern Ocean benthos. From an evolutionary perspective, this strong dissimilarity between shelf and slope fauna could be interpreted as evidence for survival in shelf refugias, rather than migration into deeper waters during glacial maxima. The previously unsampled Amundsen Sea is shown to be diverse, harbouring a high level of taxonomic novelty, with many species new to science. The polychaete community of the inner shelf in the Amundsen Sea (Pine Island Bay) has also been shown to be of deep-sea character, likely due to intrusion of the Circumpolar Deep Water onto the shelf. In the Scotia Sea, our data support the notion of relatively high biodiversity of waters around the South Orkney Islands, South Georgia, and Shag Rocks (all recently established as Marine Protected Areas) and depressed diversity in the extreme environment of Southern Thule. Article in Journal/Newspaper Amundsen Sea Antarc* Antarctica Pine Island Pine Island Bay Scotia Sea South Orkney Islands Southern Ocean Southern Thule University of Tasmania: UTas ePrints Amundsen Sea Island Bay ENVELOPE(-109.085,-109.085,59.534,59.534) Pine Island Bay ENVELOPE(-102.000,-102.000,-74.750,-74.750) Scotia Sea Shag Rocks ENVELOPE(-42.033,-42.033,-53.550,-53.550) South Orkney Islands ENVELOPE(-45.500,-45.500,-60.583,-60.583) Southern Ocean Southern Thule ENVELOPE(-27.200,-27.200,-59.433,-59.433) Marine Biodiversity 48 1 581 601 |
institution |
Open Polar |
collection |
University of Tasmania: UTas ePrints |
op_collection_id |
ftunivtasmania |
language |
English |
topic |
Antarctica Southern Ocean Amundsen Sea Scotia Sea Annelida Polychaeta taxonomy deep sea depth zonation |
spellingShingle |
Antarctica Southern Ocean Amundsen Sea Scotia Sea Annelida Polychaeta taxonomy deep sea depth zonation Neal, L Linse, K Brasier, MJ Sherlock, E Glover, AG Comparative marine biodiversity and depth zonation in the Southern Ocean: evidence from a new large polychaete dataset from Scotia and Amundsen seas |
topic_facet |
Antarctica Southern Ocean Amundsen Sea Scotia Sea Annelida Polychaeta taxonomy deep sea depth zonation |
description |
Based on a dataset of 16,991 and 307 morphospecies of polychaete worms collected from 58 epibenthic sledge deployments across the Scotia and Amundsen Seas, we show that the structures of their shelf, deep-shelf and slope communities are composed of distinct polychaete assemblages spanning regions with “high”, “intermediate”, and “low” biodiversity. Depth has been identified as the main factor structuring the polychaete communities in both seas, countering the prevalent notion of extended eurybathy of the Southern Ocean benthos. From an evolutionary perspective, this strong dissimilarity between shelf and slope fauna could be interpreted as evidence for survival in shelf refugias, rather than migration into deeper waters during glacial maxima. The previously unsampled Amundsen Sea is shown to be diverse, harbouring a high level of taxonomic novelty, with many species new to science. The polychaete community of the inner shelf in the Amundsen Sea (Pine Island Bay) has also been shown to be of deep-sea character, likely due to intrusion of the Circumpolar Deep Water onto the shelf. In the Scotia Sea, our data support the notion of relatively high biodiversity of waters around the South Orkney Islands, South Georgia, and Shag Rocks (all recently established as Marine Protected Areas) and depressed diversity in the extreme environment of Southern Thule. |
format |
Article in Journal/Newspaper |
author |
Neal, L Linse, K Brasier, MJ Sherlock, E Glover, AG |
author_facet |
Neal, L Linse, K Brasier, MJ Sherlock, E Glover, AG |
author_sort |
Neal, L |
title |
Comparative marine biodiversity and depth zonation in the Southern Ocean: evidence from a new large polychaete dataset from Scotia and Amundsen seas |
title_short |
Comparative marine biodiversity and depth zonation in the Southern Ocean: evidence from a new large polychaete dataset from Scotia and Amundsen seas |
title_full |
Comparative marine biodiversity and depth zonation in the Southern Ocean: evidence from a new large polychaete dataset from Scotia and Amundsen seas |
title_fullStr |
Comparative marine biodiversity and depth zonation in the Southern Ocean: evidence from a new large polychaete dataset from Scotia and Amundsen seas |
title_full_unstemmed |
Comparative marine biodiversity and depth zonation in the Southern Ocean: evidence from a new large polychaete dataset from Scotia and Amundsen seas |
title_sort |
comparative marine biodiversity and depth zonation in the southern ocean: evidence from a new large polychaete dataset from scotia and amundsen seas |
publisher |
Springer |
publishDate |
2018 |
url |
https://eprints.utas.edu.au/37523/ https://eprints.utas.edu.au/37523/1/146247%20-%20Comparative%20marine%20biodiversity%20and%20depth%20zonation.pdf |
long_lat |
ENVELOPE(-109.085,-109.085,59.534,59.534) ENVELOPE(-102.000,-102.000,-74.750,-74.750) ENVELOPE(-42.033,-42.033,-53.550,-53.550) ENVELOPE(-45.500,-45.500,-60.583,-60.583) ENVELOPE(-27.200,-27.200,-59.433,-59.433) |
geographic |
Amundsen Sea Island Bay Pine Island Bay Scotia Sea Shag Rocks South Orkney Islands Southern Ocean Southern Thule |
geographic_facet |
Amundsen Sea Island Bay Pine Island Bay Scotia Sea Shag Rocks South Orkney Islands Southern Ocean Southern Thule |
genre |
Amundsen Sea Antarc* Antarctica Pine Island Pine Island Bay Scotia Sea South Orkney Islands Southern Ocean Southern Thule |
genre_facet |
Amundsen Sea Antarc* Antarctica Pine Island Pine Island Bay Scotia Sea South Orkney Islands Southern Ocean Southern Thule |
op_relation |
https://eprints.utas.edu.au/37523/1/146247%20-%20Comparative%20marine%20biodiversity%20and%20depth%20zonation.pdf Neal, L, Linse, K, Brasier, MJ orcid:0000-0003-2844-655X , Sherlock, E and Glover, AG 2018 , 'Comparative marine biodiversity and depth zonation in the Southern Ocean: evidence from a new large polychaete dataset from Scotia and Amundsen seas' , Marine Biodiversity, vol. 48 , 581–601 , doi:10.1007/s12526-017-0735-y <http://dx.doi.org/10.1007/s12526-017-0735-y>. |
op_doi |
https://doi.org/10.1007/s12526-017-0735-y |
container_title |
Marine Biodiversity |
container_volume |
48 |
container_issue |
1 |
container_start_page |
581 |
op_container_end_page |
601 |
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1766374208994017280 |