Zooplankton biomass in the ice-covered Weddell Sea, Antarctica
Zooplankton was sampled by a Rectangular Midwater Trawl (RMT 1 + 8) in Weddell Sea surface waters (0 to 300 m) between 66 and 78°S during austral summer (February – March 1983). Sixty-nine taxa including different developmental stages were considered and divided into 16 size classes between <1 an...
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1991
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Online Access: | https://oceanrep.geomar.de/id/eprint/1624/ https://oceanrep.geomar.de/id/eprint/1624/1/art_10.1007_BF01319704.pdf https://doi.org/10.1007/BF01319704 |
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ftoceanrep:oai:oceanrep.geomar.de:1624 2023-05-15T14:11:37+02:00 Zooplankton biomass in the ice-covered Weddell Sea, Antarctica Boysen-Ennen, E. Hagen, W. Hubold, G. Piatkowski, Uwe 1991 text https://oceanrep.geomar.de/id/eprint/1624/ https://oceanrep.geomar.de/id/eprint/1624/1/art_10.1007_BF01319704.pdf https://doi.org/10.1007/BF01319704 en eng Springer https://oceanrep.geomar.de/id/eprint/1624/1/art_10.1007_BF01319704.pdf Boysen-Ennen, E., Hagen, W., Hubold, G. and Piatkowski, U. (1991) Zooplankton biomass in the ice-covered Weddell Sea, Antarctica. Marine Biology, 111 . pp. 227-235. DOI 10.1007/BF01319704 <https://doi.org/10.1007/BF01319704>. doi:10.1007/BF01319704 info:eu-repo/semantics/restrictedAccess Article PeerReviewed 1991 ftoceanrep https://doi.org/10.1007/BF01319704 2023-04-07T14:44:18Z Zooplankton was sampled by a Rectangular Midwater Trawl (RMT 1 + 8) in Weddell Sea surface waters (0 to 300 m) between 66 and 78°S during austral summer (February – March 1983). Sixty-nine taxa including different developmental stages were considered and divided into 16 size classes between <1 and >39.5 mm length. Biomass was determined by taxon and size class for three different meso- and macroplankton communities in the oceanic region, on the northeastern shelf and on the southern shelf of the Weddell Sea. The highest biomass of 11.2 mg DW m−3 (3.4 g DW m−2) was found in the northeastern shelf community (70 to 74°S), where juvenile and adultEuphausia crystallorophias accounted for 3.7 mg DW m−3 (1.1 g DW m−2). Although not quantitatively sampled, early copepodite stages (CI to CIII) ofCalanoides acutus andCalanus propinquus ranked second with 2.7 mg DW m−3 (0.8 g DW m−2). Biomass in the northeastern shelf community was concentrated in the size ranges 1 to 4 mm and 19.5 to 39.5 mm. The oceanic community of the central Weddell Sea was dominated by copepods smaller than 5 mm, which made up half of the total oceanic biomass. The tunicateSalpa thompsoni (7.0 to 8.5 mm) was the dominant single species with 1.6 mg DW m−3 (0.5 g DW m−2). Euphausiids, mainly juvenile and adult krillEuphausia superba, comprised 1.2 mg DW m−3 (0.4 g DW m−2). Total standing stock in the oceanic community was 9.4 mg DWm−3 (2.8 g DW m−2). Lowest biomass values were found in the southern shelf community (south of 75°S) with 4.0 mg DW m−3 (1.2 g DW m−2), concentrated in the 1 to 4 mm and 14.5 to 34.5 mm size classes. Abundant species were the pteropodLimacina helicina (1 to 2 mm; 0.7 mg DW m−3; 0.2 g DW m−2) andE. crystallorophias (24.5 to 39.5 mm; 0.9 mg DW m−3; 0.3 g DW m−2). The data reveal that it is essential to distinguish among subsystems in the Southern Ocean. This leads to a better understanding of the structure and function of those pelagic food webs which represent alternatives to the paradigmatic krill-centered system. Article in Journal/Newspaper Antarc* Antarctica Southern Ocean Weddell Sea Copepods OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Austral Southern Ocean Weddell Weddell Sea Marine Biology 111 2 227 235 |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
Zooplankton was sampled by a Rectangular Midwater Trawl (RMT 1 + 8) in Weddell Sea surface waters (0 to 300 m) between 66 and 78°S during austral summer (February – March 1983). Sixty-nine taxa including different developmental stages were considered and divided into 16 size classes between <1 and >39.5 mm length. Biomass was determined by taxon and size class for three different meso- and macroplankton communities in the oceanic region, on the northeastern shelf and on the southern shelf of the Weddell Sea. The highest biomass of 11.2 mg DW m−3 (3.4 g DW m−2) was found in the northeastern shelf community (70 to 74°S), where juvenile and adultEuphausia crystallorophias accounted for 3.7 mg DW m−3 (1.1 g DW m−2). Although not quantitatively sampled, early copepodite stages (CI to CIII) ofCalanoides acutus andCalanus propinquus ranked second with 2.7 mg DW m−3 (0.8 g DW m−2). Biomass in the northeastern shelf community was concentrated in the size ranges 1 to 4 mm and 19.5 to 39.5 mm. The oceanic community of the central Weddell Sea was dominated by copepods smaller than 5 mm, which made up half of the total oceanic biomass. The tunicateSalpa thompsoni (7.0 to 8.5 mm) was the dominant single species with 1.6 mg DW m−3 (0.5 g DW m−2). Euphausiids, mainly juvenile and adult krillEuphausia superba, comprised 1.2 mg DW m−3 (0.4 g DW m−2). Total standing stock in the oceanic community was 9.4 mg DWm−3 (2.8 g DW m−2). Lowest biomass values were found in the southern shelf community (south of 75°S) with 4.0 mg DW m−3 (1.2 g DW m−2), concentrated in the 1 to 4 mm and 14.5 to 34.5 mm size classes. Abundant species were the pteropodLimacina helicina (1 to 2 mm; 0.7 mg DW m−3; 0.2 g DW m−2) andE. crystallorophias (24.5 to 39.5 mm; 0.9 mg DW m−3; 0.3 g DW m−2). The data reveal that it is essential to distinguish among subsystems in the Southern Ocean. This leads to a better understanding of the structure and function of those pelagic food webs which represent alternatives to the paradigmatic krill-centered system. |
format |
Article in Journal/Newspaper |
author |
Boysen-Ennen, E. Hagen, W. Hubold, G. Piatkowski, Uwe |
spellingShingle |
Boysen-Ennen, E. Hagen, W. Hubold, G. Piatkowski, Uwe Zooplankton biomass in the ice-covered Weddell Sea, Antarctica |
author_facet |
Boysen-Ennen, E. Hagen, W. Hubold, G. Piatkowski, Uwe |
author_sort |
Boysen-Ennen, E. |
title |
Zooplankton biomass in the ice-covered Weddell Sea, Antarctica |
title_short |
Zooplankton biomass in the ice-covered Weddell Sea, Antarctica |
title_full |
Zooplankton biomass in the ice-covered Weddell Sea, Antarctica |
title_fullStr |
Zooplankton biomass in the ice-covered Weddell Sea, Antarctica |
title_full_unstemmed |
Zooplankton biomass in the ice-covered Weddell Sea, Antarctica |
title_sort |
zooplankton biomass in the ice-covered weddell sea, antarctica |
publisher |
Springer |
publishDate |
1991 |
url |
https://oceanrep.geomar.de/id/eprint/1624/ https://oceanrep.geomar.de/id/eprint/1624/1/art_10.1007_BF01319704.pdf https://doi.org/10.1007/BF01319704 |
geographic |
Austral Southern Ocean Weddell Weddell Sea |
geographic_facet |
Austral Southern Ocean Weddell Weddell Sea |
genre |
Antarc* Antarctica Southern Ocean Weddell Sea Copepods |
genre_facet |
Antarc* Antarctica Southern Ocean Weddell Sea Copepods |
op_relation |
https://oceanrep.geomar.de/id/eprint/1624/1/art_10.1007_BF01319704.pdf Boysen-Ennen, E., Hagen, W., Hubold, G. and Piatkowski, U. (1991) Zooplankton biomass in the ice-covered Weddell Sea, Antarctica. Marine Biology, 111 . pp. 227-235. DOI 10.1007/BF01319704 <https://doi.org/10.1007/BF01319704>. doi:10.1007/BF01319704 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1007/BF01319704 |
container_title |
Marine Biology |
container_volume |
111 |
container_issue |
2 |
container_start_page |
227 |
op_container_end_page |
235 |
_version_ |
1766283779612082176 |