The Southern Ocean: Source and sink?
Many members of the benthic fauna of the Antarctic continental shelf share close phylogenetic relationships to the deep-sea fauna adjacent to Antarctica and in other ocean basins. It has been suggested that connections between the Southern Ocean and the deep sea have been facilitated by the presence...
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ftoceanrep:oai:oceanrep.geomar.de:53844 2023-05-15T14:00:49+02:00 The Southern Ocean: Source and sink? Strugnell, J. M. Cherel, Y. Cooke, I. R. Gleadall, I. G. Hochberg, F. G. Ibáñez, C. M. Jorgensen, E. Laptikhovsky, V. V. Linse, K. Norman, M. Vecchione, M. Voight, J. R. Allcock, A. L. 2011-01 text https://oceanrep.geomar.de/id/eprint/53844/ https://oceanrep.geomar.de/id/eprint/53844/1/4498.pdf https://doi.org/10.1016/j.dsr2.2010.05.015 en eng Elsevier https://oceanrep.geomar.de/id/eprint/53844/1/4498.pdf Strugnell, J. M., Cherel, Y., Cooke, I. R., Gleadall, I. G., Hochberg, F. G., Ibáñez, C. M., Jorgensen, E., Laptikhovsky, V. V., Linse, K., Norman, M., Vecchione, M., Voight, J. R. and Allcock, A. L. (2011) The Southern Ocean: Source and sink?. Deep Sea Research Part II: Topical Studies in Oceanography, 58 (1-2). pp. 196-204. DOI 10.1016/j.dsr2.2010.05.015 <https://doi.org/10.1016/j.dsr2.2010.05.015>. doi:10.1016/j.dsr2.2010.05.015 info:eu-repo/semantics/restrictedAccess Article PeerReviewed 2011 ftoceanrep https://doi.org/10.1016/j.dsr2.2010.05.015 2023-04-07T15:58:27Z Many members of the benthic fauna of the Antarctic continental shelf share close phylogenetic relationships to the deep-sea fauna adjacent to Antarctica and in other ocean basins. It has been suggested that connections between the Southern Ocean and the deep sea have been facilitated by the presence of a deep Antarctic continental shelf coupled with submerging Antarctic bottom water and emerging circumpolar deep water. These conditions may have allowed ‘polar submergence’, whereby shallow Southern Ocean fauna have colonised the deep sea and ‘polar emergence’, whereby deep-sea fauna colonised the shallow Southern Ocean. A recent molecular study showed that a lineage of deep-sea and Southern Ocean octopuses with a uniserial sucker arrangement on their arms appear to have arisen via polar submergence. A distantly related clade of octopuses with a biserial sucker arrangement on their arms (historically placed in the genus Benthoctopus) is also present in the deep-sea basins of the world and the Southern Ocean. To date their evolutionary history has not been examined. The present study investigated the origins of this group using 3133 base pairs (bp) of nucleotide data from five mitochondrial genes (12S rRNA, 16S rRNA, cytochrome c oxidase subunit I, cytochrome c oxidase subunit III, cytochrome b) and the nuclear gene rhodopsin from at least 18 species (and 7 outgroup taxa). Bayesian relaxed clock analyses showed that Benthoctopus species with a high-latitude distribution in the Southern Hemisphere represent a paraphyletic group comprised of three independent clades. The results suggest that the Benthoctopus clade originated in relatively shallow Northern Hemisphere waters. Benthoctopus species distributed in the Southern Ocean are representative of polar emergence and occur at shallower depths than non-polar Benthoctopus species. Article in Journal/Newspaper Antarc* Antarctic Antarctica Southern Ocean OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Antarctic Southern Ocean The Antarctic Deep Sea Research Part II: Topical Studies in Oceanography 58 1-2 196 204 |
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Open Polar |
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OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
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ftoceanrep |
language |
English |
description |
Many members of the benthic fauna of the Antarctic continental shelf share close phylogenetic relationships to the deep-sea fauna adjacent to Antarctica and in other ocean basins. It has been suggested that connections between the Southern Ocean and the deep sea have been facilitated by the presence of a deep Antarctic continental shelf coupled with submerging Antarctic bottom water and emerging circumpolar deep water. These conditions may have allowed ‘polar submergence’, whereby shallow Southern Ocean fauna have colonised the deep sea and ‘polar emergence’, whereby deep-sea fauna colonised the shallow Southern Ocean. A recent molecular study showed that a lineage of deep-sea and Southern Ocean octopuses with a uniserial sucker arrangement on their arms appear to have arisen via polar submergence. A distantly related clade of octopuses with a biserial sucker arrangement on their arms (historically placed in the genus Benthoctopus) is also present in the deep-sea basins of the world and the Southern Ocean. To date their evolutionary history has not been examined. The present study investigated the origins of this group using 3133 base pairs (bp) of nucleotide data from five mitochondrial genes (12S rRNA, 16S rRNA, cytochrome c oxidase subunit I, cytochrome c oxidase subunit III, cytochrome b) and the nuclear gene rhodopsin from at least 18 species (and 7 outgroup taxa). Bayesian relaxed clock analyses showed that Benthoctopus species with a high-latitude distribution in the Southern Hemisphere represent a paraphyletic group comprised of three independent clades. The results suggest that the Benthoctopus clade originated in relatively shallow Northern Hemisphere waters. Benthoctopus species distributed in the Southern Ocean are representative of polar emergence and occur at shallower depths than non-polar Benthoctopus species. |
format |
Article in Journal/Newspaper |
author |
Strugnell, J. M. Cherel, Y. Cooke, I. R. Gleadall, I. G. Hochberg, F. G. Ibáñez, C. M. Jorgensen, E. Laptikhovsky, V. V. Linse, K. Norman, M. Vecchione, M. Voight, J. R. Allcock, A. L. |
spellingShingle |
Strugnell, J. M. Cherel, Y. Cooke, I. R. Gleadall, I. G. Hochberg, F. G. Ibáñez, C. M. Jorgensen, E. Laptikhovsky, V. V. Linse, K. Norman, M. Vecchione, M. Voight, J. R. Allcock, A. L. The Southern Ocean: Source and sink? |
author_facet |
Strugnell, J. M. Cherel, Y. Cooke, I. R. Gleadall, I. G. Hochberg, F. G. Ibáñez, C. M. Jorgensen, E. Laptikhovsky, V. V. Linse, K. Norman, M. Vecchione, M. Voight, J. R. Allcock, A. L. |
author_sort |
Strugnell, J. M. |
title |
The Southern Ocean: Source and sink? |
title_short |
The Southern Ocean: Source and sink? |
title_full |
The Southern Ocean: Source and sink? |
title_fullStr |
The Southern Ocean: Source and sink? |
title_full_unstemmed |
The Southern Ocean: Source and sink? |
title_sort |
southern ocean: source and sink? |
publisher |
Elsevier |
publishDate |
2011 |
url |
https://oceanrep.geomar.de/id/eprint/53844/ https://oceanrep.geomar.de/id/eprint/53844/1/4498.pdf https://doi.org/10.1016/j.dsr2.2010.05.015 |
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_relation |
https://oceanrep.geomar.de/id/eprint/53844/1/4498.pdf Strugnell, J. M., Cherel, Y., Cooke, I. R., Gleadall, I. G., Hochberg, F. G., Ibáñez, C. M., Jorgensen, E., Laptikhovsky, V. V., Linse, K., Norman, M., Vecchione, M., Voight, J. R. and Allcock, A. L. (2011) The Southern Ocean: Source and sink?. Deep Sea Research Part II: Topical Studies in Oceanography, 58 (1-2). pp. 196-204. DOI 10.1016/j.dsr2.2010.05.015 <https://doi.org/10.1016/j.dsr2.2010.05.015>. doi:10.1016/j.dsr2.2010.05.015 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1016/j.dsr2.2010.05.015 |
container_title |
Deep Sea Research Part II: Topical Studies in Oceanography |
container_volume |
58 |
container_issue |
1-2 |
container_start_page |
196 |
op_container_end_page |
204 |
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