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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PUBLIC LIBRARY SCIENCE
2012
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Online Access: | https://epic.awi.de/id/eprint/25898/ https://epic.awi.de/id/eprint/25898/1/Flores2012_KrillUnderIce_.pone.0031775.pdf https://epic.awi.de/id/eprint/25898/2/Flores2012_KrillUnderIce_suppl.0031775.s001.pdf http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0031775 https://hdl.handle.net/10013/epic.39564 https://hdl.handle.net/10013/epic.39564.d001 https://hdl.handle.net/10013/epic.39564.d002 |
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ftawi:oai:epic.awi.de:25898 2023-05-15T13:46:51+02:00 The association of Antarctic krill Euphausia superba with the under-ice habitat Flores, Hauke Franeker, Jan Andries Siegel, Volker Haraldsson, Matilda Strass, Volker Meesters, Erik Hubert Bathmann, Ulrich Wolff, Willem Jan 2012-02-23 application/pdf https://epic.awi.de/id/eprint/25898/ https://epic.awi.de/id/eprint/25898/1/Flores2012_KrillUnderIce_.pone.0031775.pdf https://epic.awi.de/id/eprint/25898/2/Flores2012_KrillUnderIce_suppl.0031775.s001.pdf http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0031775 https://hdl.handle.net/10013/epic.39564 https://hdl.handle.net/10013/epic.39564.d001 https://hdl.handle.net/10013/epic.39564.d002 unknown PUBLIC LIBRARY SCIENCE https://epic.awi.de/id/eprint/25898/1/Flores2012_KrillUnderIce_.pone.0031775.pdf https://hdl.handle.net/10013/epic.39564.d001 https://epic.awi.de/id/eprint/25898/2/Flores2012_KrillUnderIce_suppl.0031775.s001.pdf https://hdl.handle.net/10013/epic.39564.d002 Flores, H. orcid:0000-0003-1617-5449 , Franeker, J. A. , Siegel, V. , Haraldsson, M. , Strass, V. orcid:0000-0002-7539-1400 , Meesters, E. H. , Bathmann, U. and Wolff, W. J. (2012) The association of Antarctic krill Euphausia superba with the under-ice habitat , PLoS ONE, 7 (2), e31775 . doi:10.1371/journal.pone.0031775 <https://doi.org/10.1371/journal.pone.0031775> , hdl:10013/epic.39564 EPIC3PLoS ONE, PUBLIC LIBRARY SCIENCE, 7(2), pp. e31775, ISSN: 1932-6203 Article isiRev 2012 ftawi https://doi.org/10.1371/journal.pone.0031775 2021-12-24T15:35:33Z 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 Euphausia superba Lazarev Sea Sea ice Southern Ocean Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Antarctic Southern Ocean Austral Lazarev ENVELOPE(12.917,12.917,-69.967,-69.967) Lazarev Sea ENVELOPE(7.000,7.000,-68.000,-68.000) PLoS ONE 7 2 e31775 |
institution |
Open Polar |
collection |
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
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 Franeker, Jan Andries Siegel, Volker Haraldsson, Matilda Strass, Volker Meesters, Erik Hubert Bathmann, Ulrich Wolff, Willem Jan |
spellingShingle |
Flores, Hauke 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 |
author_facet |
Flores, Hauke 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 |
publisher |
PUBLIC LIBRARY SCIENCE |
publishDate |
2012 |
url |
https://epic.awi.de/id/eprint/25898/ https://epic.awi.de/id/eprint/25898/1/Flores2012_KrillUnderIce_.pone.0031775.pdf https://epic.awi.de/id/eprint/25898/2/Flores2012_KrillUnderIce_suppl.0031775.s001.pdf http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0031775 https://hdl.handle.net/10013/epic.39564 https://hdl.handle.net/10013/epic.39564.d001 https://hdl.handle.net/10013/epic.39564.d002 |
long_lat |
ENVELOPE(12.917,12.917,-69.967,-69.967) ENVELOPE(7.000,7.000,-68.000,-68.000) |
geographic |
Antarctic Southern Ocean Austral Lazarev Lazarev Sea |
geographic_facet |
Antarctic Southern Ocean Austral Lazarev Lazarev Sea |
genre |
Antarc* Antarctic Antarctic Krill Euphausia superba Lazarev Sea Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctic Krill Euphausia superba Lazarev Sea Sea ice Southern Ocean |
op_source |
EPIC3PLoS ONE, PUBLIC LIBRARY SCIENCE, 7(2), pp. e31775, ISSN: 1932-6203 |
op_relation |
https://epic.awi.de/id/eprint/25898/1/Flores2012_KrillUnderIce_.pone.0031775.pdf https://hdl.handle.net/10013/epic.39564.d001 https://epic.awi.de/id/eprint/25898/2/Flores2012_KrillUnderIce_suppl.0031775.s001.pdf https://hdl.handle.net/10013/epic.39564.d002 Flores, H. orcid:0000-0003-1617-5449 , Franeker, J. A. , Siegel, V. , Haraldsson, M. , Strass, V. orcid:0000-0002-7539-1400 , Meesters, E. H. , Bathmann, U. and Wolff, W. J. (2012) The association of Antarctic krill Euphausia superba with the under-ice habitat , PLoS ONE, 7 (2), e31775 . doi:10.1371/journal.pone.0031775 <https://doi.org/10.1371/journal.pone.0031775> , hdl:10013/epic.39564 |
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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1766245350209748992 |