Spatial distribution patterns of ascidians (Ascidiacea: Tunicata) on the continental shelves off the northern Antarctic Peninsula.
Ascidians (Ascidiacea: Tunicata) are sessile suspension feeders that represent dominant epifaunal components of the Southern Ocean shelf benthos and play a significant role in the pelagic–benthic coupling. Here, we report the results of a first study on the relationship between the distribution patt...
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Online Access: | https://epic.awi.de/id/eprint/41004/ https://epic.awi.de/id/eprint/41004/2/Segelken_etalPoBi2016.pdf https://hdl.handle.net/10013/epic.47970 https://hdl.handle.net/10013/epic.47970.d002 |
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ftawi:oai:epic.awi.de:41004 2023-05-15T13:40:27+02:00 Spatial distribution patterns of ascidians (Ascidiacea: Tunicata) on the continental shelves off the northern Antarctic Peninsula. Segelken-Voigt, Alexandra Bracher, Astrid Dorschel, Boris Gutt, Julian Huneke, Wilma Link, Heike Piepenburg, Dieter 2016-03 application/pdf https://epic.awi.de/id/eprint/41004/ https://epic.awi.de/id/eprint/41004/2/Segelken_etalPoBi2016.pdf https://hdl.handle.net/10013/epic.47970 https://hdl.handle.net/10013/epic.47970.d002 unknown SPRINGER https://epic.awi.de/id/eprint/41004/2/Segelken_etalPoBi2016.pdf https://hdl.handle.net/10013/epic.47970.d002 Segelken-Voigt, A. , Bracher, A. orcid:0000-0003-3025-5517 , Dorschel, B. orcid:0000-0002-3495-5927 , Gutt, J. , Huneke, W. , Link, H. and Piepenburg, D. orcid:0000-0003-3977-2860 (2016) Spatial distribution patterns of ascidians (Ascidiacea: Tunicata) on the continental shelves off the northern Antarctic Peninsula. , Polar Biology, 39 (5), pp. 863-879 . doi:10.1007/s00300-016-1909-y <https://doi.org/10.1007/s00300-016-1909-y> , hdl:10013/epic.47970 EPIC3Polar Biology, SPRINGER, 39(5), pp. 863-879, ISSN: 0722-4060 Article isiRev 2016 ftawi https://doi.org/10.1007/s00300-016-1909-y 2021-12-24T15:41:37Z Ascidians (Ascidiacea: Tunicata) are sessile suspension feeders that represent dominant epifaunal components of the Southern Ocean shelf benthos and play a significant role in the pelagic–benthic coupling. Here, we report the results of a first study on the relationship between the distribution patterns of eight common and/or abundant (putative) ascidian species, and environmental drivers in the waters off the northern Antarctic Peninsula. During RV Polarstern cruise XXIX/3 (PS81) in January–March 2013, we used seabed imaging surveys along 28 photographic transects of 2 km length each at water depths from 70 to 770 m in three regions (northwestern Weddell Sea, southern Bransfield Strait and southern Drake Passage), differing in their general environmental setting, primarily oceanographic characteristics and sea-ice dynamics, to comparatively analyze the spatial patterns in the abundance of the selected ascidians, reliably to be identified in the photographs, at three nested spatial scales. At a regional (100-km) scale, the ascidian assemblages of the Weddell Sea differed significantly from those of the other two regions, whereas at an intermediate 10-km scale no such differences were detected among habitat types (bank, upper slope, slope, deep/canyon) on the shelf and at the shelf break within each region. These spatial patterns were superimposed by a marked small-scale (10-m) patchiness of ascidian distribution within the 2-km-long transects. Among the environmental variables considered in our study, a combination of water-mass characteristics, sea-ice dynamics (approximated by 5-year averages in sea-ice cover in the region of or surrounding the photographic stations), as well as the seabed ruggedness, was identified as explaining best the distribution patterns of the ascidians. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Bransfield Strait Drake Passage Polar Biology Sea ice Southern Ocean Weddell Sea Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Antarctic Antarctic Peninsula Bransfield Strait Drake Passage Southern Ocean Weddell Weddell Sea Polar Biology 39 5 863 879 |
institution |
Open Polar |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
Ascidians (Ascidiacea: Tunicata) are sessile suspension feeders that represent dominant epifaunal components of the Southern Ocean shelf benthos and play a significant role in the pelagic–benthic coupling. Here, we report the results of a first study on the relationship between the distribution patterns of eight common and/or abundant (putative) ascidian species, and environmental drivers in the waters off the northern Antarctic Peninsula. During RV Polarstern cruise XXIX/3 (PS81) in January–March 2013, we used seabed imaging surveys along 28 photographic transects of 2 km length each at water depths from 70 to 770 m in three regions (northwestern Weddell Sea, southern Bransfield Strait and southern Drake Passage), differing in their general environmental setting, primarily oceanographic characteristics and sea-ice dynamics, to comparatively analyze the spatial patterns in the abundance of the selected ascidians, reliably to be identified in the photographs, at three nested spatial scales. At a regional (100-km) scale, the ascidian assemblages of the Weddell Sea differed significantly from those of the other two regions, whereas at an intermediate 10-km scale no such differences were detected among habitat types (bank, upper slope, slope, deep/canyon) on the shelf and at the shelf break within each region. These spatial patterns were superimposed by a marked small-scale (10-m) patchiness of ascidian distribution within the 2-km-long transects. Among the environmental variables considered in our study, a combination of water-mass characteristics, sea-ice dynamics (approximated by 5-year averages in sea-ice cover in the region of or surrounding the photographic stations), as well as the seabed ruggedness, was identified as explaining best the distribution patterns of the ascidians. |
format |
Article in Journal/Newspaper |
author |
Segelken-Voigt, Alexandra Bracher, Astrid Dorschel, Boris Gutt, Julian Huneke, Wilma Link, Heike Piepenburg, Dieter |
spellingShingle |
Segelken-Voigt, Alexandra Bracher, Astrid Dorschel, Boris Gutt, Julian Huneke, Wilma Link, Heike Piepenburg, Dieter Spatial distribution patterns of ascidians (Ascidiacea: Tunicata) on the continental shelves off the northern Antarctic Peninsula. |
author_facet |
Segelken-Voigt, Alexandra Bracher, Astrid Dorschel, Boris Gutt, Julian Huneke, Wilma Link, Heike Piepenburg, Dieter |
author_sort |
Segelken-Voigt, Alexandra |
title |
Spatial distribution patterns of ascidians (Ascidiacea: Tunicata) on the continental shelves off the northern Antarctic Peninsula. |
title_short |
Spatial distribution patterns of ascidians (Ascidiacea: Tunicata) on the continental shelves off the northern Antarctic Peninsula. |
title_full |
Spatial distribution patterns of ascidians (Ascidiacea: Tunicata) on the continental shelves off the northern Antarctic Peninsula. |
title_fullStr |
Spatial distribution patterns of ascidians (Ascidiacea: Tunicata) on the continental shelves off the northern Antarctic Peninsula. |
title_full_unstemmed |
Spatial distribution patterns of ascidians (Ascidiacea: Tunicata) on the continental shelves off the northern Antarctic Peninsula. |
title_sort |
spatial distribution patterns of ascidians (ascidiacea: tunicata) on the continental shelves off the northern antarctic peninsula. |
publisher |
SPRINGER |
publishDate |
2016 |
url |
https://epic.awi.de/id/eprint/41004/ https://epic.awi.de/id/eprint/41004/2/Segelken_etalPoBi2016.pdf https://hdl.handle.net/10013/epic.47970 https://hdl.handle.net/10013/epic.47970.d002 |
geographic |
Antarctic Antarctic Peninsula Bransfield Strait Drake Passage Southern Ocean Weddell Weddell Sea |
geographic_facet |
Antarctic Antarctic Peninsula Bransfield Strait Drake Passage Southern Ocean Weddell Weddell Sea |
genre |
Antarc* Antarctic Antarctic Peninsula Bransfield Strait Drake Passage Polar Biology Sea ice Southern Ocean Weddell Sea |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Bransfield Strait Drake Passage Polar Biology Sea ice Southern Ocean Weddell Sea |
op_source |
EPIC3Polar Biology, SPRINGER, 39(5), pp. 863-879, ISSN: 0722-4060 |
op_relation |
https://epic.awi.de/id/eprint/41004/2/Segelken_etalPoBi2016.pdf https://hdl.handle.net/10013/epic.47970.d002 Segelken-Voigt, A. , Bracher, A. orcid:0000-0003-3025-5517 , Dorschel, B. orcid:0000-0002-3495-5927 , Gutt, J. , Huneke, W. , Link, H. and Piepenburg, D. orcid:0000-0003-3977-2860 (2016) Spatial distribution patterns of ascidians (Ascidiacea: Tunicata) on the continental shelves off the northern Antarctic Peninsula. , Polar Biology, 39 (5), pp. 863-879 . doi:10.1007/s00300-016-1909-y <https://doi.org/10.1007/s00300-016-1909-y> , hdl:10013/epic.47970 |
op_doi |
https://doi.org/10.1007/s00300-016-1909-y |
container_title |
Polar Biology |
container_volume |
39 |
container_issue |
5 |
container_start_page |
863 |
op_container_end_page |
879 |
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