Spatial distribution patterns of ascidians (Ascidiacea: Tunicata) in combination with information on bathymetry, oceanography, chlorophyll-a, and sea-ice on the continental shelves off the northern Antarctic Peninsula during POLARSTERN cruise ANT-XXIX/3
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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2016
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.849291 2023-05-15T13:44:47+02:00 Spatial distribution patterns of ascidians (Ascidiacea: Tunicata) in combination with information on bathymetry, oceanography, chlorophyll-a, and sea-ice on the continental shelves off the northern Antarctic Peninsula during POLARSTERN cruise ANT-XXIX/3 Segelken-Voigt, Alexandra Bracher, Astrid Dorschel, Boris Gutt, Julian Huneke, Wilma Link, Heike Piepenburg, Dieter MEDIAN LATITUDE: -62.871663 * MEDIAN LONGITUDE: -57.983340 * SOUTH-BOUND LATITUDE: -64.008246 * WEST-BOUND LONGITUDE: -61.232206 * NORTH-BOUND LATITUDE: -61.936088 * EAST-BOUND LONGITUDE: -54.100406 * DATE/TIME START: 2013-01-26T09:02:00 * DATE/TIME END: 2013-03-12T21:00:36 2016-09-10 application/zip, 4 datasets https://doi.pangaea.de/10.1594/PANGAEA.849291 https://doi.org/10.1594/PANGAEA.849291 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.849291 https://doi.org/10.1594/PANGAEA.849291 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Segelken-Voigt, Alexandra; Bracher, Astrid; Dorschel, Boris; Gutt, Julian; Huneke, Wilma; Link, Heike; Piepenburg, Dieter (2016): Spatial distribution patterns of ascidians (Ascidiacea: Tunicata) on the continental shelves off the northern Antarctic Peninsula. Polar Biology, 39(5), 863-879, https://doi.org/10.1007/s00300-016-1909-y Dataset 2016 ftpangaea https://doi.org/10.1594/PANGAEA.849291 https://doi.org/10.1007/s00300-016-1909-y 2023-01-20T07:33:31Z 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. Dataset Antarc* Antarctic Antarctic Peninsula Bransfield Strait Drake Passage Polar Biology Sea ice Southern Ocean Weddell Sea PANGAEA - Data Publisher for Earth & Environmental Science Antarctic Southern Ocean Antarctic Peninsula Weddell Sea Drake Passage Bransfield Strait Weddell ENVELOPE(-61.232206,-54.100406,-61.936088,-64.008246) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
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 |
Dataset |
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) in combination with information on bathymetry, oceanography, chlorophyll-a, and sea-ice on the continental shelves off the northern Antarctic Peninsula during POLARSTERN cruise ANT-XXIX/3 |
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) in combination with information on bathymetry, oceanography, chlorophyll-a, and sea-ice on the continental shelves off the northern Antarctic Peninsula during POLARSTERN cruise ANT-XXIX/3 |
title_short |
Spatial distribution patterns of ascidians (Ascidiacea: Tunicata) in combination with information on bathymetry, oceanography, chlorophyll-a, and sea-ice on the continental shelves off the northern Antarctic Peninsula during POLARSTERN cruise ANT-XXIX/3 |
title_full |
Spatial distribution patterns of ascidians (Ascidiacea: Tunicata) in combination with information on bathymetry, oceanography, chlorophyll-a, and sea-ice on the continental shelves off the northern Antarctic Peninsula during POLARSTERN cruise ANT-XXIX/3 |
title_fullStr |
Spatial distribution patterns of ascidians (Ascidiacea: Tunicata) in combination with information on bathymetry, oceanography, chlorophyll-a, and sea-ice on the continental shelves off the northern Antarctic Peninsula during POLARSTERN cruise ANT-XXIX/3 |
title_full_unstemmed |
Spatial distribution patterns of ascidians (Ascidiacea: Tunicata) in combination with information on bathymetry, oceanography, chlorophyll-a, and sea-ice on the continental shelves off the northern Antarctic Peninsula during POLARSTERN cruise ANT-XXIX/3 |
title_sort |
spatial distribution patterns of ascidians (ascidiacea: tunicata) in combination with information on bathymetry, oceanography, chlorophyll-a, and sea-ice on the continental shelves off the northern antarctic peninsula during polarstern cruise ant-xxix/3 |
publisher |
PANGAEA |
publishDate |
2016 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.849291 https://doi.org/10.1594/PANGAEA.849291 |
op_coverage |
MEDIAN LATITUDE: -62.871663 * MEDIAN LONGITUDE: -57.983340 * SOUTH-BOUND LATITUDE: -64.008246 * WEST-BOUND LONGITUDE: -61.232206 * NORTH-BOUND LATITUDE: -61.936088 * EAST-BOUND LONGITUDE: -54.100406 * DATE/TIME START: 2013-01-26T09:02:00 * DATE/TIME END: 2013-03-12T21:00:36 |
long_lat |
ENVELOPE(-61.232206,-54.100406,-61.936088,-64.008246) |
geographic |
Antarctic Southern Ocean Antarctic Peninsula Weddell Sea Drake Passage Bransfield Strait Weddell |
geographic_facet |
Antarctic Southern Ocean Antarctic Peninsula Weddell Sea Drake Passage Bransfield Strait Weddell |
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 |
Supplement to: Segelken-Voigt, Alexandra; Bracher, Astrid; Dorschel, Boris; Gutt, Julian; Huneke, Wilma; Link, Heike; Piepenburg, Dieter (2016): Spatial distribution patterns of ascidians (Ascidiacea: Tunicata) on the continental shelves off the northern Antarctic Peninsula. Polar Biology, 39(5), 863-879, https://doi.org/10.1007/s00300-016-1909-y |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.849291 https://doi.org/10.1594/PANGAEA.849291 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.849291 https://doi.org/10.1007/s00300-016-1909-y |
_version_ |
1766206348085690368 |