Metabolism and biomass vertical distribution of zooplankton in the Bransfield Strait during the austral summer of 2000
The vertical distribution (0–550 m) of zooplankton biomass, and indices of respiration (electron transfer system [ETS]) and structural growth (aminoacyltRNA synthetases activity [AARS]), were studied in waters off the Antarctic Peninsula during the austral summer of 2000. The dominant species were t...
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Norwegian Polar Institute
2009
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Online Access: | https://polarresearch.net/index.php/polar/article/view/2848 https://doi.org/10.3402/polar.v28i3.6136 |
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ftjpolarres:oai:journals.openacademia.net:article/2848 2023-05-15T14:01:21+02:00 Metabolism and biomass vertical distribution of zooplankton in the Bransfield Strait during the austral summer of 2000 Yebra, Lidia Hernández-León, Santiago Almeida, Carlos Bécognée, Pierrick 2009-12-01 application/pdf https://polarresearch.net/index.php/polar/article/view/2848 https://doi.org/10.3402/polar.v28i3.6136 eng eng Norwegian Polar Institute https://polarresearch.net/index.php/polar/article/view/2848/6475 https://polarresearch.net/index.php/polar/article/view/2848 doi:10.3402/polar.v28i3.6136 Copyright (c) 2018 Polar Research Polar Research; Vol. 28 No. 3 (2009); 415-425 1751-8369 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2009 ftjpolarres https://doi.org/10.3402/polar.v28i3.6136 2021-11-11T19:13:21Z The vertical distribution (0–550 m) of zooplankton biomass, and indices of respiration (electron transfer system [ETS]) and structural growth (aminoacyltRNA synthetases activity [AARS]), were studied in waters off the Antarctic Peninsula during the austral summer of 2000. The dominant species were the copepod Metridia gerlachei and the euphausiid Euphausia superba. We observed a vertical krill/copepod substitution in the water column. The zooplankton biomass in the layer at a depth of 200–500 m was of the same magnitude as the biomass in the layer at a depth of 0–200 m, indicating that biomass in the mesopelagic zone is an important fraction of the total zooplankton in Antarctic waters. The metabolic rates of the zooplankton community were sustained by less than 0.5% of the primary production in the area, suggesting that microplankton or small copepods are the main food source. Neither food availability nor predation seemed to control mesozooplankton biomass. The wide time lag between the abundance peak of the dominant copepod (M. gerlachei) and the phytoplankton bloom is suggested to be the main explanation for the low summer zooplankton biomass observed in these waters. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Bransfield Strait Euphausia superba Polar Research Copepods Polar Research (E-Journal) Antarctic The Antarctic Antarctic Peninsula Austral Bransfield Strait Polar Research 28 3 |
institution |
Open Polar |
collection |
Polar Research (E-Journal) |
op_collection_id |
ftjpolarres |
language |
English |
description |
The vertical distribution (0–550 m) of zooplankton biomass, and indices of respiration (electron transfer system [ETS]) and structural growth (aminoacyltRNA synthetases activity [AARS]), were studied in waters off the Antarctic Peninsula during the austral summer of 2000. The dominant species were the copepod Metridia gerlachei and the euphausiid Euphausia superba. We observed a vertical krill/copepod substitution in the water column. The zooplankton biomass in the layer at a depth of 200–500 m was of the same magnitude as the biomass in the layer at a depth of 0–200 m, indicating that biomass in the mesopelagic zone is an important fraction of the total zooplankton in Antarctic waters. The metabolic rates of the zooplankton community were sustained by less than 0.5% of the primary production in the area, suggesting that microplankton or small copepods are the main food source. Neither food availability nor predation seemed to control mesozooplankton biomass. The wide time lag between the abundance peak of the dominant copepod (M. gerlachei) and the phytoplankton bloom is suggested to be the main explanation for the low summer zooplankton biomass observed in these waters. |
format |
Article in Journal/Newspaper |
author |
Yebra, Lidia Hernández-León, Santiago Almeida, Carlos Bécognée, Pierrick |
spellingShingle |
Yebra, Lidia Hernández-León, Santiago Almeida, Carlos Bécognée, Pierrick Metabolism and biomass vertical distribution of zooplankton in the Bransfield Strait during the austral summer of 2000 |
author_facet |
Yebra, Lidia Hernández-León, Santiago Almeida, Carlos Bécognée, Pierrick |
author_sort |
Yebra, Lidia |
title |
Metabolism and biomass vertical distribution of zooplankton in the Bransfield Strait during the austral summer of 2000 |
title_short |
Metabolism and biomass vertical distribution of zooplankton in the Bransfield Strait during the austral summer of 2000 |
title_full |
Metabolism and biomass vertical distribution of zooplankton in the Bransfield Strait during the austral summer of 2000 |
title_fullStr |
Metabolism and biomass vertical distribution of zooplankton in the Bransfield Strait during the austral summer of 2000 |
title_full_unstemmed |
Metabolism and biomass vertical distribution of zooplankton in the Bransfield Strait during the austral summer of 2000 |
title_sort |
metabolism and biomass vertical distribution of zooplankton in the bransfield strait during the austral summer of 2000 |
publisher |
Norwegian Polar Institute |
publishDate |
2009 |
url |
https://polarresearch.net/index.php/polar/article/view/2848 https://doi.org/10.3402/polar.v28i3.6136 |
geographic |
Antarctic The Antarctic Antarctic Peninsula Austral Bransfield Strait |
geographic_facet |
Antarctic The Antarctic Antarctic Peninsula Austral Bransfield Strait |
genre |
Antarc* Antarctic Antarctic Peninsula Bransfield Strait Euphausia superba Polar Research Copepods |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Bransfield Strait Euphausia superba Polar Research Copepods |
op_source |
Polar Research; Vol. 28 No. 3 (2009); 415-425 1751-8369 |
op_relation |
https://polarresearch.net/index.php/polar/article/view/2848/6475 https://polarresearch.net/index.php/polar/article/view/2848 doi:10.3402/polar.v28i3.6136 |
op_rights |
Copyright (c) 2018 Polar Research |
op_doi |
https://doi.org/10.3402/polar.v28i3.6136 |
container_title |
Polar Research |
container_volume |
28 |
container_issue |
3 |
_version_ |
1766271091913785344 |