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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Online Access: | https://research.wur.nl/en/publications/the-association-of-antarctic-krill-euphausia-superba-with-the-und https://doi.org/10.1371/journal.pone.0031775 |
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ftunivwagenin:oai:library.wur.nl:wurpubs/422794 2024-02-04T09:54:55+01:00 The Association of Antarctic Krill Euphausia superba with the Under-Ice Habitat Florentino De Souza Silva, A.P. van Franeker, J.A. Siegel, V. Haraldsson, M. Strass, V. Meesters, H.W.G. Bathmann, U. Wolff, W.J. 2012 application/pdf https://research.wur.nl/en/publications/the-association-of-antarctic-krill-euphausia-superba-with-the-und https://doi.org/10.1371/journal.pone.0031775 en eng https://edepot.wur.nl/200924 https://research.wur.nl/en/publications/the-association-of-antarctic-krill-euphausia-superba-with-the-und doi:10.1371/journal.pone.0031775 info:eu-repo/semantics/openAccess Wageningen University & Research PLoS ONE 7 (2012) 2 ISSN: 1932-6203 community structure elephant island energy budgets foraging behavior lazarev sea northern weddell sea pack-ice population-dynamics southern-ocean trophic relationships info:eu-repo/semantics/article Article/Letter to editor info:eu-repo/semantics/publishedVersion 2012 ftunivwagenin https://doi.org/10.1371/journal.pone.0031775 2024-01-10T23:21:19Z 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 Wageningen UR (University & Research Centre): Digital Library Antarctic Southern Ocean Weddell Sea Austral Weddell Lazarev ENVELOPE(12.917,12.917,-69.967,-69.967) Lazarev Sea ENVELOPE(7.000,7.000,-68.000,-68.000) Elephant Island ENVELOPE(-55.184,-55.184,-61.085,-61.085) PLoS ONE 7 2 e31775 |
institution |
Open Polar |
collection |
Wageningen UR (University & Research Centre): Digital Library |
op_collection_id |
ftunivwagenin |
language |
English |
topic |
community structure elephant island energy budgets foraging behavior lazarev sea northern weddell sea pack-ice population-dynamics southern-ocean trophic relationships |
spellingShingle |
community structure elephant island energy budgets foraging behavior lazarev sea northern weddell sea pack-ice population-dynamics southern-ocean trophic relationships Florentino De Souza Silva, A.P. van Franeker, J.A. Siegel, V. Haraldsson, M. Strass, V. Meesters, H.W.G. Bathmann, U. Wolff, W.J. The Association of Antarctic Krill Euphausia superba with the Under-Ice Habitat |
topic_facet |
community structure elephant island energy budgets foraging behavior lazarev sea northern weddell sea pack-ice population-dynamics southern-ocean trophic relationships |
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 |
Florentino De Souza Silva, A.P. van Franeker, J.A. Siegel, V. Haraldsson, M. Strass, V. Meesters, H.W.G. Bathmann, U. Wolff, W.J. |
author_facet |
Florentino De Souza Silva, A.P. van Franeker, J.A. Siegel, V. Haraldsson, M. Strass, V. Meesters, H.W.G. Bathmann, U. Wolff, W.J. |
author_sort |
Florentino De Souza Silva, A.P. |
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://research.wur.nl/en/publications/the-association-of-antarctic-krill-euphausia-superba-with-the-und https://doi.org/10.1371/journal.pone.0031775 |
long_lat |
ENVELOPE(12.917,12.917,-69.967,-69.967) ENVELOPE(7.000,7.000,-68.000,-68.000) ENVELOPE(-55.184,-55.184,-61.085,-61.085) |
geographic |
Antarctic Southern Ocean Weddell Sea Austral Weddell Lazarev Lazarev Sea Elephant Island |
geographic_facet |
Antarctic Southern Ocean Weddell Sea Austral Weddell Lazarev Lazarev Sea Elephant Island |
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 |
PLoS ONE 7 (2012) 2 ISSN: 1932-6203 |
op_relation |
https://edepot.wur.nl/200924 https://research.wur.nl/en/publications/the-association-of-antarctic-krill-euphausia-superba-with-the-und doi:10.1371/journal.pone.0031775 |
op_rights |
info:eu-repo/semantics/openAccess Wageningen University & Research |
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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1789958746248577024 |