reference : Increasing contaminant burdens in an arctic fish, Burbot (Lota lota), in a warming climate

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Bibliographic fields
reftype Journal Article
Abstract The temporal patterns of mercury (Hg), polychlorinated biphenyls (PCBs), and other contaminants in Arctic aquatic biota are usually attributed to changing atmospheric sources. However, climate variability and change is another means of altering contaminant fate and bioavailability. We show here that the concentrations of Hg and PCBs in Mackenzie River burbot ( Lota lota ), a top predator fish and important staple food for northern Canadian communities, have increased significantly over the last 25 years despite falling or stable atmospheric concentrations, suggesting that environmental processes subsequent to atmospheric transport are responsible. Using a dated sediment core from a tributary lake near the Mackenzie River sampling site, we show that variations in Hg concentrations downcore are strongly associated with labile, algal-derived organic matter (OM). Strong temporal correlations between increasing primary productivity and biotic Hg and PCBs as reflected by burbot suggest that warming temperatures and reduced ice cover may lead to increased exposure to these contaminants in high trophic level Arctic freshwater biota.
Author Carrie, J.; Wang, F.; Sanei, H.; Macdonald, R. W.; Outridge, P. M.; Stern, G. A.
DOI 10.1021/es902582y
Date Jan 1
ISSN 1520-5851
Issue 1
Journal Environmental Science & Technology
Keywords Animals; Arctic Regions; *Climate; Eukaryota/metabolism; Fishes/*metabolism; Hot Temperature; Mercury/*metabolism; Polychlorinated Biphenyls/*metabolism; Water Pollutants, Chemical/*metabolism
Language eng
Notes Carrie, J Wang, F Sanei, H Macdonald, R W Outridge, P M Stern, G A Journal Article Research Support, Non-U.S. Gov't United States Environ Sci Technol. 2010 Jan 1;44(1):316-22. doi: 10.1021/es902582y.
Pages 316-322
Title Increasing contaminant burdens in an arctic fish, Burbot (Lota lota), in a warming climate
Volume 44
Year 2010
Bibliographic identifiers
.reference_type 0
_record_number 19047
_uuid 67bf0866-1dd9-49ce-a909-848cc3f69a77