Persistent organohalogen contaminant burdens in Antarctic krill (Euphausia superba) from the eastern Antarctic sector: A baseline study
A baseline for persistent organohalogen compound (POC) accumulation in the Antarctic keystone species, Antarctic krill (Euphausia superba) has been established for a 50° longitudinal range of the eastern Antarctic sector. Samples of adult krill, caught from 12 sites distributed between 30° and 80°E...
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2008
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ftunivqespace:oai:espace.library.uq.edu.au:UQ:162160 2023-05-15T13:54:42+02:00 Persistent organohalogen contaminant burdens in Antarctic krill (Euphausia superba) from the eastern Antarctic sector: A baseline study Bengtson Nash, S. Poulsen, A. Kawaguchi, S. Vetter, W. Schlabach, M. 2008-12-15 https://espace.library.uq.edu.au/view/UQ:162160 eng eng Elsevier Scientific doi:10.1016/j.scitotenv.2008.08.034 issn:0048-9697 Persistent organohalogen compounds (POCs) Antarctic krill Eastern Antarctic sector Baseline assessment Southern Ocean ecosystem 300804 Environmental Impact Assessment C1 960502 Ecosystem Assessment and Management of Antarctic and Sub-Antarctic Environments 960801 Antarctic and Sub-Antarctic Flora Fauna and Biodiversity 050204 Environmental Impact Assessment Journal Article 2008 ftunivqespace https://doi.org/10.1016/j.scitotenv.2008.08.034 2020-09-28T22:45:05Z A baseline for persistent organohalogen compound (POC) accumulation in the Antarctic keystone species, Antarctic krill (Euphausia superba) has been established for a 50° longitudinal range of the eastern Antarctic sector. Samples of adult krill, caught from 12 sites distributed between 30° and 80°E (60–70°S), were analysed for N100 organohalogen compounds including chlorinated pesticides, polychlorinated biphenyls (PCBs), polybrominated organic compounds and polychlorinated dibenzo-p-dioxins/furans (PCDD/Fs). Organochlorine pesticides dominated measured krill contaminant burdens with hexachlorobenzene (HCB) as the single most abundant compound quantified. Krill HCB concentrations were comparable to those detected at this trophic level in both the Arctic and temperatenorthwestAtlantic, lendingsupport for thehypothesis thatHCB will approachglobal equilibriumat a faster rate than other POCs. Para, para′-dichlorodiphenylethene (p,p′-DDE)was detected at notable concentrations. Measurements of DDT and its degradation products provide an important baseline for monitoring the temporal and geographical influence of renewed, DDT usage for malaria-control in affected southern hemisphere countries. In contrast to the Arctic, PCBs did not feature prominently in contaminant burdens of Antarctic krill. Themajor commercial polybrominated diphenyl ether (PBDE) congeners -99 and -47 were quantified at lowbackground levelswith clear concentration spikes observed at around 70°E , in the vicinity of modern, active research stations. The likelihood that local anthropogenic activities are supplementing low PBDE levels, delivered otherwise primarily via long range environmental transport, is discussed. The suspected naturally occurring brominated organic compound, 2,4,6-tribromoanisole (TBA), was a ubiquitous contaminant in all samples whereas the only PCDD/Fs quantifiable were trace levels of octachlorodibenzo-p-dioxin (OCDD) and 1,2,3,4,7,8/1,2,3,4,7,9-hexachlorodibenzofuran (HxCDF). With the aims of; i) Generating a robust and broadly applicable POC auditing platform for the scarcely studied eastern Antarctic sector; ii) Determining the compounds accumulating in Antarctic krill for further toxicity evaluation studies and iii) Establishing a baseline for Antarctic predator exposure to POCs, this study represents one of the most comprehensive reports of POC contamination of the Antarctic food web to date. Article in Journal/Newspaper Antarc* Antarctic Antarctic Krill Arctic Euphausia superba Southern Ocean The University of Queensland: UQ eSpace Arctic Antarctic Southern Ocean The Antarctic Science of The Total Environment 407 1 304 314 |
institution |
Open Polar |
collection |
The University of Queensland: UQ eSpace |
op_collection_id |
ftunivqespace |
language |
English |
topic |
Persistent organohalogen compounds (POCs) Antarctic krill Eastern Antarctic sector Baseline assessment Southern Ocean ecosystem 300804 Environmental Impact Assessment C1 960502 Ecosystem Assessment and Management of Antarctic and Sub-Antarctic Environments 960801 Antarctic and Sub-Antarctic Flora Fauna and Biodiversity 050204 Environmental Impact Assessment |
spellingShingle |
Persistent organohalogen compounds (POCs) Antarctic krill Eastern Antarctic sector Baseline assessment Southern Ocean ecosystem 300804 Environmental Impact Assessment C1 960502 Ecosystem Assessment and Management of Antarctic and Sub-Antarctic Environments 960801 Antarctic and Sub-Antarctic Flora Fauna and Biodiversity 050204 Environmental Impact Assessment Bengtson Nash, S. Poulsen, A. Kawaguchi, S. Vetter, W. Schlabach, M. Persistent organohalogen contaminant burdens in Antarctic krill (Euphausia superba) from the eastern Antarctic sector: A baseline study |
topic_facet |
Persistent organohalogen compounds (POCs) Antarctic krill Eastern Antarctic sector Baseline assessment Southern Ocean ecosystem 300804 Environmental Impact Assessment C1 960502 Ecosystem Assessment and Management of Antarctic and Sub-Antarctic Environments 960801 Antarctic and Sub-Antarctic Flora Fauna and Biodiversity 050204 Environmental Impact Assessment |
description |
A baseline for persistent organohalogen compound (POC) accumulation in the Antarctic keystone species, Antarctic krill (Euphausia superba) has been established for a 50° longitudinal range of the eastern Antarctic sector. Samples of adult krill, caught from 12 sites distributed between 30° and 80°E (60–70°S), were analysed for N100 organohalogen compounds including chlorinated pesticides, polychlorinated biphenyls (PCBs), polybrominated organic compounds and polychlorinated dibenzo-p-dioxins/furans (PCDD/Fs). Organochlorine pesticides dominated measured krill contaminant burdens with hexachlorobenzene (HCB) as the single most abundant compound quantified. Krill HCB concentrations were comparable to those detected at this trophic level in both the Arctic and temperatenorthwestAtlantic, lendingsupport for thehypothesis thatHCB will approachglobal equilibriumat a faster rate than other POCs. Para, para′-dichlorodiphenylethene (p,p′-DDE)was detected at notable concentrations. Measurements of DDT and its degradation products provide an important baseline for monitoring the temporal and geographical influence of renewed, DDT usage for malaria-control in affected southern hemisphere countries. In contrast to the Arctic, PCBs did not feature prominently in contaminant burdens of Antarctic krill. Themajor commercial polybrominated diphenyl ether (PBDE) congeners -99 and -47 were quantified at lowbackground levelswith clear concentration spikes observed at around 70°E , in the vicinity of modern, active research stations. The likelihood that local anthropogenic activities are supplementing low PBDE levels, delivered otherwise primarily via long range environmental transport, is discussed. The suspected naturally occurring brominated organic compound, 2,4,6-tribromoanisole (TBA), was a ubiquitous contaminant in all samples whereas the only PCDD/Fs quantifiable were trace levels of octachlorodibenzo-p-dioxin (OCDD) and 1,2,3,4,7,8/1,2,3,4,7,9-hexachlorodibenzofuran (HxCDF). With the aims of; i) Generating a robust and broadly applicable POC auditing platform for the scarcely studied eastern Antarctic sector; ii) Determining the compounds accumulating in Antarctic krill for further toxicity evaluation studies and iii) Establishing a baseline for Antarctic predator exposure to POCs, this study represents one of the most comprehensive reports of POC contamination of the Antarctic food web to date. |
format |
Article in Journal/Newspaper |
author |
Bengtson Nash, S. Poulsen, A. Kawaguchi, S. Vetter, W. Schlabach, M. |
author_facet |
Bengtson Nash, S. Poulsen, A. Kawaguchi, S. Vetter, W. Schlabach, M. |
author_sort |
Bengtson Nash, S. |
title |
Persistent organohalogen contaminant burdens in Antarctic krill (Euphausia superba) from the eastern Antarctic sector: A baseline study |
title_short |
Persistent organohalogen contaminant burdens in Antarctic krill (Euphausia superba) from the eastern Antarctic sector: A baseline study |
title_full |
Persistent organohalogen contaminant burdens in Antarctic krill (Euphausia superba) from the eastern Antarctic sector: A baseline study |
title_fullStr |
Persistent organohalogen contaminant burdens in Antarctic krill (Euphausia superba) from the eastern Antarctic sector: A baseline study |
title_full_unstemmed |
Persistent organohalogen contaminant burdens in Antarctic krill (Euphausia superba) from the eastern Antarctic sector: A baseline study |
title_sort |
persistent organohalogen contaminant burdens in antarctic krill (euphausia superba) from the eastern antarctic sector: a baseline study |
publisher |
Elsevier Scientific |
publishDate |
2008 |
url |
https://espace.library.uq.edu.au/view/UQ:162160 |
geographic |
Arctic Antarctic Southern Ocean The Antarctic |
geographic_facet |
Arctic Antarctic Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Antarctic Krill Arctic Euphausia superba Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctic Krill Arctic Euphausia superba Southern Ocean |
op_relation |
doi:10.1016/j.scitotenv.2008.08.034 issn:0048-9697 |
op_doi |
https://doi.org/10.1016/j.scitotenv.2008.08.034 |
container_title |
Science of The Total Environment |
container_volume |
407 |
container_issue |
1 |
container_start_page |
304 |
op_container_end_page |
314 |
_version_ |
1766260768816234496 |