Toxicity survey of Canadian Arctic marine sediments
Purpose This paper reports a toxicity survey of Canadian Arctic marine sediments. During the Amundsen scientific cruise, eight sites distributed across the Canadian Arctic and sub-Arctic regions were selected to highlight sensitive areas affected by either atmospheric deposition, ocean current, rive...
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Online Access: | https://espace.inrs.ca/id/eprint/3016/ https://www.ncbi.nlm.nih.gov/pubmed/?term=23147987 https://doi.org/10.1007/s11368-013-0792-1 |
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ftinrsquebec:oai:espace.inrs.ca:3016 2023-05-15T14:26:22+02:00 Toxicity survey of Canadian Arctic marine sediments Canário, João Poissant, Laurier Pilote, Martin Blaise, Christian Constant, Philippe Férard, Jean-François Gagné, François 2014 https://espace.inrs.ca/id/eprint/3016/ https://www.ncbi.nlm.nih.gov/pubmed/?term=23147987 https://doi.org/10.1007/s11368-013-0792-1 unknown Canário, João, Poissant, Laurier, Pilote, Martin, Blaise, Christian, Constant, Philippe, Férard, Jean-François et Gagné, François (2014). Toxicity survey of Canadian Arctic marine sediments Journal of Soils and Sediments , vol. 14 , nº 1. p. 196-203. DOI:10.1007/s11368-013-0792-1 <https://doi.org/10.1007/s11368-013-0792-1>. http://dx.doi.org/10.1007/s11368-013-0792-1 Canadian Arctic Hudson Bay Mercury Northwest Passage Sediments Toxicity mackenzie river humic-acid ocean pathways system Article Évalué par les pairs 2014 ftinrsquebec https://doi.org/10.1007/s11368-013-0792-1 2023-02-10T11:42:12Z Purpose This paper reports a toxicity survey of Canadian Arctic marine sediments. During the Amundsen scientific cruise, eight sites distributed across the Canadian Arctic and sub-Arctic regions were selected to highlight sensitive areas affected by either atmospheric deposition, ocean current, river drainage, or anthropogenic activities. As part of the Canadian-led ArcticNet research program, this study aims to monitor and to better understand potential changes likely to impact the Arctic. Materials and methods Surface sediments were investigated with bioanalytical tests to assess sediment toxicity. Testing of sediment elutriates was undertaken with the ARTOXKIT M, Microtox liquid phase (MLPA), and ROTOXKIT M toxicity assays, while whole sediment testing was carried out with the Microtox solid phase assay (MSPA) toxicity test procedure. Sediment mercury (Hg) content was also determined in each sample since Hg transport and toxicity is specifically an important issue in the Arctic and is generally a key indicator of the pollution status in many aquatic ecosystems. Results and discussion Based on bioassay results and sediment granulometric criteria, these Arctic sediments must be considered nontoxic. However, based on MSPA half maximal inhibitory concentrations (IC50s) and/or MLPA threshold effect concentration (TEC) values, some degree of toxicity may be measureable particularly in the sediments located in southern and northeast Hudson Bay. The Hudson Bay watershed drains 30% of Canadian rivers and extends to northern USA. Despite the large Hg concern in the Arctic, the input of local or long-range Hg sources does not appear to be a contributing factor to sediment toxicity. Conclusions These initial results are valuable in that they set baseline quality levels for these sediments as of 2005. As such, future comparisons can be made to assess temporal and spatial trends. Human activity and climate change is expected to impact these regions in the future, resulting in further reduction of sea ice extent, access to ... Article in Journal/Newspaper Arctic Arctic ArcticNet Climate change Hudson Bay Mackenzie river Northwest passage Sea ice Institut national de la recherche scientifique, Québec: Espace INRS Arctic Hudson Bay Mackenzie River Hudson Northwest Passage Journal of Soils and Sediments 14 1 196 203 |
institution |
Open Polar |
collection |
Institut national de la recherche scientifique, Québec: Espace INRS |
op_collection_id |
ftinrsquebec |
language |
unknown |
topic |
Canadian Arctic Hudson Bay Mercury Northwest Passage Sediments Toxicity mackenzie river humic-acid ocean pathways system |
spellingShingle |
Canadian Arctic Hudson Bay Mercury Northwest Passage Sediments Toxicity mackenzie river humic-acid ocean pathways system Canário, João Poissant, Laurier Pilote, Martin Blaise, Christian Constant, Philippe Férard, Jean-François Gagné, François Toxicity survey of Canadian Arctic marine sediments |
topic_facet |
Canadian Arctic Hudson Bay Mercury Northwest Passage Sediments Toxicity mackenzie river humic-acid ocean pathways system |
description |
Purpose This paper reports a toxicity survey of Canadian Arctic marine sediments. During the Amundsen scientific cruise, eight sites distributed across the Canadian Arctic and sub-Arctic regions were selected to highlight sensitive areas affected by either atmospheric deposition, ocean current, river drainage, or anthropogenic activities. As part of the Canadian-led ArcticNet research program, this study aims to monitor and to better understand potential changes likely to impact the Arctic. Materials and methods Surface sediments were investigated with bioanalytical tests to assess sediment toxicity. Testing of sediment elutriates was undertaken with the ARTOXKIT M, Microtox liquid phase (MLPA), and ROTOXKIT M toxicity assays, while whole sediment testing was carried out with the Microtox solid phase assay (MSPA) toxicity test procedure. Sediment mercury (Hg) content was also determined in each sample since Hg transport and toxicity is specifically an important issue in the Arctic and is generally a key indicator of the pollution status in many aquatic ecosystems. Results and discussion Based on bioassay results and sediment granulometric criteria, these Arctic sediments must be considered nontoxic. However, based on MSPA half maximal inhibitory concentrations (IC50s) and/or MLPA threshold effect concentration (TEC) values, some degree of toxicity may be measureable particularly in the sediments located in southern and northeast Hudson Bay. The Hudson Bay watershed drains 30% of Canadian rivers and extends to northern USA. Despite the large Hg concern in the Arctic, the input of local or long-range Hg sources does not appear to be a contributing factor to sediment toxicity. Conclusions These initial results are valuable in that they set baseline quality levels for these sediments as of 2005. As such, future comparisons can be made to assess temporal and spatial trends. Human activity and climate change is expected to impact these regions in the future, resulting in further reduction of sea ice extent, access to ... |
format |
Article in Journal/Newspaper |
author |
Canário, João Poissant, Laurier Pilote, Martin Blaise, Christian Constant, Philippe Férard, Jean-François Gagné, François |
author_facet |
Canário, João Poissant, Laurier Pilote, Martin Blaise, Christian Constant, Philippe Férard, Jean-François Gagné, François |
author_sort |
Canário, João |
title |
Toxicity survey of Canadian Arctic marine sediments |
title_short |
Toxicity survey of Canadian Arctic marine sediments |
title_full |
Toxicity survey of Canadian Arctic marine sediments |
title_fullStr |
Toxicity survey of Canadian Arctic marine sediments |
title_full_unstemmed |
Toxicity survey of Canadian Arctic marine sediments |
title_sort |
toxicity survey of canadian arctic marine sediments |
publishDate |
2014 |
url |
https://espace.inrs.ca/id/eprint/3016/ https://www.ncbi.nlm.nih.gov/pubmed/?term=23147987 https://doi.org/10.1007/s11368-013-0792-1 |
geographic |
Arctic Hudson Bay Mackenzie River Hudson Northwest Passage |
geographic_facet |
Arctic Hudson Bay Mackenzie River Hudson Northwest Passage |
genre |
Arctic Arctic ArcticNet Climate change Hudson Bay Mackenzie river Northwest passage Sea ice |
genre_facet |
Arctic Arctic ArcticNet Climate change Hudson Bay Mackenzie river Northwest passage Sea ice |
op_relation |
Canário, João, Poissant, Laurier, Pilote, Martin, Blaise, Christian, Constant, Philippe, Férard, Jean-François et Gagné, François (2014). Toxicity survey of Canadian Arctic marine sediments Journal of Soils and Sediments , vol. 14 , nº 1. p. 196-203. DOI:10.1007/s11368-013-0792-1 <https://doi.org/10.1007/s11368-013-0792-1>. http://dx.doi.org/10.1007/s11368-013-0792-1 |
op_doi |
https://doi.org/10.1007/s11368-013-0792-1 |
container_title |
Journal of Soils and Sediments |
container_volume |
14 |
container_issue |
1 |
container_start_page |
196 |
op_container_end_page |
203 |
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1766298888859287552 |