Spatial variability in total and organic mercury levels in Antarctic krill Euphausia superba across the Scotia Sea
Total and organic mercury concentrations were determined for males, females and juveniles of Euphausia superba collected at three discrete locations in the Scotia Sea (the South Orkney Islands, South Georgia and the Antarctic Polar Front) to assess spatial mercury variability in Antarctic krill. The...
Published in: | Environmental Pollution |
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Main Authors: | , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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2019
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Online Access: | https://risweb.st-andrews.ac.uk/portal/en/researchoutput/spatial-variability-in-total-and-organic-mercury-levels-in-antarctic-krill-euphausia-superba-across-the-scotia-sea(3e7f2ea4-459d-4651-babb-bd6fb9f5e54f).html https://doi.org/10.1016/j.envpol.2019.01.031 https://research-repository.st-andrews.ac.uk/bitstream/10023/19270/1/Seco_2019_EP_Spatialvariability_AAM.pdf |
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ftunstandrewcris:oai:risweb.st-andrews.ac.uk:publications/3e7f2ea4-459d-4651-babb-bd6fb9f5e54f 2023-05-15T13:39:30+02:00 Spatial variability in total and organic mercury levels in Antarctic krill Euphausia superba across the Scotia Sea Seco, José Xavier, José C. Coelho, João P. Pereira, Bárbara Tarling, Geraint Pardal, Miguel A. Bustamante, Paco Stowasser, Gabriele Brierley, Andrew S. Pereira, Maria E. 2019-04 application/pdf https://risweb.st-andrews.ac.uk/portal/en/researchoutput/spatial-variability-in-total-and-organic-mercury-levels-in-antarctic-krill-euphausia-superba-across-the-scotia-sea(3e7f2ea4-459d-4651-babb-bd6fb9f5e54f).html https://doi.org/10.1016/j.envpol.2019.01.031 https://research-repository.st-andrews.ac.uk/bitstream/10023/19270/1/Seco_2019_EP_Spatialvariability_AAM.pdf eng eng info:eu-repo/semantics/openAccess Seco , J , Xavier , J C , Coelho , J P , Pereira , B , Tarling , G , Pardal , M A , Bustamante , P , Stowasser , G , Brierley , A S & Pereira , M E 2019 , ' Spatial variability in total and organic mercury levels in Antarctic krill Euphausia superba across the Scotia Sea ' , Environmental Pollution , vol. 247 , pp. 332-339 . https://doi.org/10.1016/j.envpol.2019.01.031 Food-web Eggs Organic mercury Southern Ocean Antarctica article 2019 ftunstandrewcris https://doi.org/10.1016/j.envpol.2019.01.031 2022-07-21T07:00:56Z Total and organic mercury concentrations were determined for males, females and juveniles of Euphausia superba collected at three discrete locations in the Scotia Sea (the South Orkney Islands, South Georgia and the Antarctic Polar Front) to assess spatial mercury variability in Antarctic krill. There was clear geographic differentiation in mercury concentrations, with specimens from the South Orkneys having total mercury concentrations 5 to 7 times higher than Antarctic krill from South Georgia and the Antarctic Polar Front. Mercury did not appear to accumulate with life-stage since juveniles had higher concentrations of total mercury (0.071 μg g −1 from South Orkney Islands; 0.015 μg g −1 from South Georgia) than adults (0.054 μg g −1 in females and 0.048 μg g −1 in males from South Orkney Islands; 0.006 μg g −1 in females and 0.007 μg g −1 in males from South Georgia). Results suggest that females use egg laying as a mechanism to excrete mercury, with eggs having higher concentrations than the corresponding somatic tissue. Organic mercury makes up a minor percentage of total mercury (15–37%) with the percentage being greater in adults than in juveniles. When compared to euphausiids from other parts of the world, the concentration of mercury in Antarctic krill is within the same range, or higher, highlighting the global distribution of this contaminant. Given the high potential for biomagnification of mercury through food webs, concentrations in Antarctic krill may have deleterious effects on long-lived Antarctic krill predators. Article in Journal/Newspaper Antarc* Antarctic Antarctic Krill Antarctica Euphausia superba Scotia Sea South Orkney Islands Southern Ocean University of St Andrews: Research Portal Antarctic Scotia Sea South Orkney Islands ENVELOPE(-45.500,-45.500,-60.583,-60.583) Southern Ocean The Antarctic Environmental Pollution 247 332 339 |
institution |
Open Polar |
collection |
University of St Andrews: Research Portal |
op_collection_id |
ftunstandrewcris |
language |
English |
topic |
Food-web Eggs Organic mercury Southern Ocean Antarctica |
spellingShingle |
Food-web Eggs Organic mercury Southern Ocean Antarctica Seco, José Xavier, José C. Coelho, João P. Pereira, Bárbara Tarling, Geraint Pardal, Miguel A. Bustamante, Paco Stowasser, Gabriele Brierley, Andrew S. Pereira, Maria E. Spatial variability in total and organic mercury levels in Antarctic krill Euphausia superba across the Scotia Sea |
topic_facet |
Food-web Eggs Organic mercury Southern Ocean Antarctica |
description |
Total and organic mercury concentrations were determined for males, females and juveniles of Euphausia superba collected at three discrete locations in the Scotia Sea (the South Orkney Islands, South Georgia and the Antarctic Polar Front) to assess spatial mercury variability in Antarctic krill. There was clear geographic differentiation in mercury concentrations, with specimens from the South Orkneys having total mercury concentrations 5 to 7 times higher than Antarctic krill from South Georgia and the Antarctic Polar Front. Mercury did not appear to accumulate with life-stage since juveniles had higher concentrations of total mercury (0.071 μg g −1 from South Orkney Islands; 0.015 μg g −1 from South Georgia) than adults (0.054 μg g −1 in females and 0.048 μg g −1 in males from South Orkney Islands; 0.006 μg g −1 in females and 0.007 μg g −1 in males from South Georgia). Results suggest that females use egg laying as a mechanism to excrete mercury, with eggs having higher concentrations than the corresponding somatic tissue. Organic mercury makes up a minor percentage of total mercury (15–37%) with the percentage being greater in adults than in juveniles. When compared to euphausiids from other parts of the world, the concentration of mercury in Antarctic krill is within the same range, or higher, highlighting the global distribution of this contaminant. Given the high potential for biomagnification of mercury through food webs, concentrations in Antarctic krill may have deleterious effects on long-lived Antarctic krill predators. |
format |
Article in Journal/Newspaper |
author |
Seco, José Xavier, José C. Coelho, João P. Pereira, Bárbara Tarling, Geraint Pardal, Miguel A. Bustamante, Paco Stowasser, Gabriele Brierley, Andrew S. Pereira, Maria E. |
author_facet |
Seco, José Xavier, José C. Coelho, João P. Pereira, Bárbara Tarling, Geraint Pardal, Miguel A. Bustamante, Paco Stowasser, Gabriele Brierley, Andrew S. Pereira, Maria E. |
author_sort |
Seco, José |
title |
Spatial variability in total and organic mercury levels in Antarctic krill Euphausia superba across the Scotia Sea |
title_short |
Spatial variability in total and organic mercury levels in Antarctic krill Euphausia superba across the Scotia Sea |
title_full |
Spatial variability in total and organic mercury levels in Antarctic krill Euphausia superba across the Scotia Sea |
title_fullStr |
Spatial variability in total and organic mercury levels in Antarctic krill Euphausia superba across the Scotia Sea |
title_full_unstemmed |
Spatial variability in total and organic mercury levels in Antarctic krill Euphausia superba across the Scotia Sea |
title_sort |
spatial variability in total and organic mercury levels in antarctic krill euphausia superba across the scotia sea |
publishDate |
2019 |
url |
https://risweb.st-andrews.ac.uk/portal/en/researchoutput/spatial-variability-in-total-and-organic-mercury-levels-in-antarctic-krill-euphausia-superba-across-the-scotia-sea(3e7f2ea4-459d-4651-babb-bd6fb9f5e54f).html https://doi.org/10.1016/j.envpol.2019.01.031 https://research-repository.st-andrews.ac.uk/bitstream/10023/19270/1/Seco_2019_EP_Spatialvariability_AAM.pdf |
long_lat |
ENVELOPE(-45.500,-45.500,-60.583,-60.583) |
geographic |
Antarctic Scotia Sea South Orkney Islands Southern Ocean The Antarctic |
geographic_facet |
Antarctic Scotia Sea South Orkney Islands Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Antarctic Krill Antarctica Euphausia superba Scotia Sea South Orkney Islands Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctic Krill Antarctica Euphausia superba Scotia Sea South Orkney Islands Southern Ocean |
op_source |
Seco , J , Xavier , J C , Coelho , J P , Pereira , B , Tarling , G , Pardal , M A , Bustamante , P , Stowasser , G , Brierley , A S & Pereira , M E 2019 , ' Spatial variability in total and organic mercury levels in Antarctic krill Euphausia superba across the Scotia Sea ' , Environmental Pollution , vol. 247 , pp. 332-339 . https://doi.org/10.1016/j.envpol.2019.01.031 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1016/j.envpol.2019.01.031 |
container_title |
Environmental Pollution |
container_volume |
247 |
container_start_page |
332 |
op_container_end_page |
339 |
_version_ |
1766119753712140288 |