The association of Antarctic krill Euphausia superba with the under-ice habitat
The association of Antarctic krill Euphausia superba with the under-ice habitat was investigated in the Lazarev Sea (Southern Ocean) during austral summer, autumn and winter. Data were obtained using novel Surface and Under Ice Trawls (SUIT), which sampled the 0-2 m surface layer both under sea ice...
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Main Authors: | , , , , , , , |
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Language: | English |
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2012
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Online Access: | https://hdl.handle.net/11370/07c14c7d-3b21-4cb4-a227-c35ba3d76c04 https://research.rug.nl/en/publications/07c14c7d-3b21-4cb4-a227-c35ba3d76c04 https://doi.org/10.1371/journal.pone.0031775 https://pure.rug.nl/ws/files/57842049/The_Association_of_Antarctic_Krill_Euphausia_superba_with.PDF |
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ftunigroningenpu:oai:pure.rug.nl:publications/07c14c7d-3b21-4cb4-a227-c35ba3d76c04 2024-09-15T17:42:15+00:00 The association of Antarctic krill Euphausia superba with the under-ice habitat Flores, Hauke van Franeker, Jan Andries Siegel, Volker Haraldsson, Matilda Strass, Volker Meesters, Erik Hubert Bathmann, Ulrich Wolff, Willem Jan 2012-02-23 application/pdf https://hdl.handle.net/11370/07c14c7d-3b21-4cb4-a227-c35ba3d76c04 https://research.rug.nl/en/publications/07c14c7d-3b21-4cb4-a227-c35ba3d76c04 https://doi.org/10.1371/journal.pone.0031775 https://pure.rug.nl/ws/files/57842049/The_Association_of_Antarctic_Krill_Euphausia_superba_with.PDF eng eng https://research.rug.nl/en/publications/07c14c7d-3b21-4cb4-a227-c35ba3d76c04 info:eu-repo/semantics/openAccess Flores , H , van Franeker , J A , Siegel , V , Haraldsson , M , Strass , V , Meesters , E H , Bathmann , U & Wolff , W J 2012 , ' The association of Antarctic krill Euphausia superba with the under-ice habitat ' , PLoS ONE , vol. 7 , no. 2 , 31775 . https://doi.org/10.1371/journal.pone.0031775 NORTHERN WEDDELL SEA SOUTHERN-OCEAN PACK-ICE COMMUNITY STRUCTURE LAZAREV SEA TROPHIC RELATIONSHIPS POPULATION-DYNAMICS FORAGING BEHAVIOR ELEPHANT ISLAND ENERGY BUDGETS article 2012 ftunigroningenpu https://doi.org/10.1371/journal.pone.0031775 2024-07-01T14:49:22Z The association of Antarctic krill Euphausia superba with the under-ice habitat was investigated in the Lazarev Sea (Southern Ocean) during austral summer, autumn and winter. Data were obtained using novel Surface and Under Ice Trawls (SUIT), which sampled the 0-2 m surface layer both under sea ice and in open water. Average surface layer densities ranged between 0.8 individuals m(-2) in summer and autumn, and 2.7 individuals m(-2) in winter. In summer, under-ice densities of Antarctic krill were significantly higher than in open waters. In autumn, the opposite pattern was observed. Under winter sea ice, densities were often low, but repeatedly far exceeded summer and autumn maxima. Statistical models showed that during summer high densities of Antarctic krill in the 0-2 m layer were associated with high ice coverage and shallow mixed layer depths, among other factors. In autumn and winter, density was related to hydrographical parameters. Average under-ice densities from the 0-2 m layer were higher than corresponding values from the 0-200 m layer collected with Rectangular Midwater Trawls (RMT) in summer. In winter, under-ice densities far surpassed maximum 0-200 m densities on several occasions. This indicates that the importance of the ice-water interface layer may be under-estimated by the pelagic nets and sonars commonly used to estimate the population size of Antarctic krill for management purposes, due to their limited ability to sample this habitat. Our results provide evidence for an almost year-round association of Antarctic krill with the under-ice habitat, hundreds of kilometres into the ice-covered area of the Lazarev Sea. Local concentrations of postlarval Antarctic krill under winter sea ice suggest that sea ice biota are important for their winter survival. These findings emphasise the susceptibility of an ecological key species to changing sea ice habitats, suggesting potential ramifications on Antarctic ecosystems induced by climate change. Article in Journal/Newspaper Antarc* Antarctic Antarctic Krill Elephant Island Euphausia superba Lazarev Sea Sea ice Southern Ocean Weddell Sea University of Groningen research database PLoS ONE 7 2 e31775 |
institution |
Open Polar |
collection |
University of Groningen research database |
op_collection_id |
ftunigroningenpu |
language |
English |
topic |
NORTHERN WEDDELL SEA SOUTHERN-OCEAN PACK-ICE COMMUNITY STRUCTURE LAZAREV SEA TROPHIC RELATIONSHIPS POPULATION-DYNAMICS FORAGING BEHAVIOR ELEPHANT ISLAND ENERGY BUDGETS |
spellingShingle |
NORTHERN WEDDELL SEA SOUTHERN-OCEAN PACK-ICE COMMUNITY STRUCTURE LAZAREV SEA TROPHIC RELATIONSHIPS POPULATION-DYNAMICS FORAGING BEHAVIOR ELEPHANT ISLAND ENERGY BUDGETS Flores, Hauke van Franeker, Jan Andries Siegel, Volker Haraldsson, Matilda Strass, Volker Meesters, Erik Hubert Bathmann, Ulrich Wolff, Willem Jan The association of Antarctic krill Euphausia superba with the under-ice habitat |
topic_facet |
NORTHERN WEDDELL SEA SOUTHERN-OCEAN PACK-ICE COMMUNITY STRUCTURE LAZAREV SEA TROPHIC RELATIONSHIPS POPULATION-DYNAMICS FORAGING BEHAVIOR ELEPHANT ISLAND ENERGY BUDGETS |
description |
The association of Antarctic krill Euphausia superba with the under-ice habitat was investigated in the Lazarev Sea (Southern Ocean) during austral summer, autumn and winter. Data were obtained using novel Surface and Under Ice Trawls (SUIT), which sampled the 0-2 m surface layer both under sea ice and in open water. Average surface layer densities ranged between 0.8 individuals m(-2) in summer and autumn, and 2.7 individuals m(-2) in winter. In summer, under-ice densities of Antarctic krill were significantly higher than in open waters. In autumn, the opposite pattern was observed. Under winter sea ice, densities were often low, but repeatedly far exceeded summer and autumn maxima. Statistical models showed that during summer high densities of Antarctic krill in the 0-2 m layer were associated with high ice coverage and shallow mixed layer depths, among other factors. In autumn and winter, density was related to hydrographical parameters. Average under-ice densities from the 0-2 m layer were higher than corresponding values from the 0-200 m layer collected with Rectangular Midwater Trawls (RMT) in summer. In winter, under-ice densities far surpassed maximum 0-200 m densities on several occasions. This indicates that the importance of the ice-water interface layer may be under-estimated by the pelagic nets and sonars commonly used to estimate the population size of Antarctic krill for management purposes, due to their limited ability to sample this habitat. Our results provide evidence for an almost year-round association of Antarctic krill with the under-ice habitat, hundreds of kilometres into the ice-covered area of the Lazarev Sea. Local concentrations of postlarval Antarctic krill under winter sea ice suggest that sea ice biota are important for their winter survival. These findings emphasise the susceptibility of an ecological key species to changing sea ice habitats, suggesting potential ramifications on Antarctic ecosystems induced by climate change. |
format |
Article in Journal/Newspaper |
author |
Flores, Hauke van Franeker, Jan Andries Siegel, Volker Haraldsson, Matilda Strass, Volker Meesters, Erik Hubert Bathmann, Ulrich Wolff, Willem Jan |
author_facet |
Flores, Hauke van Franeker, Jan Andries Siegel, Volker Haraldsson, Matilda Strass, Volker Meesters, Erik Hubert Bathmann, Ulrich Wolff, Willem Jan |
author_sort |
Flores, Hauke |
title |
The association of Antarctic krill Euphausia superba with the under-ice habitat |
title_short |
The association of Antarctic krill Euphausia superba with the under-ice habitat |
title_full |
The association of Antarctic krill Euphausia superba with the under-ice habitat |
title_fullStr |
The association of Antarctic krill Euphausia superba with the under-ice habitat |
title_full_unstemmed |
The association of Antarctic krill Euphausia superba with the under-ice habitat |
title_sort |
association of antarctic krill euphausia superba with the under-ice habitat |
publishDate |
2012 |
url |
https://hdl.handle.net/11370/07c14c7d-3b21-4cb4-a227-c35ba3d76c04 https://research.rug.nl/en/publications/07c14c7d-3b21-4cb4-a227-c35ba3d76c04 https://doi.org/10.1371/journal.pone.0031775 https://pure.rug.nl/ws/files/57842049/The_Association_of_Antarctic_Krill_Euphausia_superba_with.PDF |
genre |
Antarc* Antarctic Antarctic Krill Elephant Island Euphausia superba Lazarev Sea Sea ice Southern Ocean Weddell Sea |
genre_facet |
Antarc* Antarctic Antarctic Krill Elephant Island Euphausia superba Lazarev Sea Sea ice Southern Ocean Weddell Sea |
op_source |
Flores , H , van Franeker , J A , Siegel , V , Haraldsson , M , Strass , V , Meesters , E H , Bathmann , U & Wolff , W J 2012 , ' The association of Antarctic krill Euphausia superba with the under-ice habitat ' , PLoS ONE , vol. 7 , no. 2 , 31775 . https://doi.org/10.1371/journal.pone.0031775 |
op_relation |
https://research.rug.nl/en/publications/07c14c7d-3b21-4cb4-a227-c35ba3d76c04 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1371/journal.pone.0031775 |
container_title |
PLoS ONE |
container_volume |
7 |
container_issue |
2 |
container_start_page |
e31775 |
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1810488768785809408 |