Affiliation:
1. Department of Physical and Environmental Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, ON M1C 1A4, Canada.
2. Environmental Health Science and Research Bureau, Health Canada, 4908D - 269 Laurier Avenue West, Ottawa, ON K1A 0K9, Canada.
Abstract
Indigenous Arctic populations experience elevated exposures to many environmental contaminants compared with groups residing in southern Canada. This is largely due to consumption of traditional foods, some of which (ringed seals, beluga whales, narwhals, etc.) have relatively high concentrations of persistent organic pollutants. Models of contaminant fate, transport, and bioaccumulation represent powerful tools to explore this exposure issue, wherein combined models can be used to mechanistically and dynamically describe the entire sequence of events linking chemical emissions into the environment to ultimate contaminant concentrations in indigenous Arctic populations. In this review, various approaches adapted and applied to understanding indigenous Arctic contaminant exposure are explored, including early models describing body burdens in single traditional food species to more recent approaches holistically examining uptake and bioaccumulation in entire food chains. The applications of these models are also discussed, including attempts to (i) identify chemical properties favouring transport to, and bioaccumulation in, the Arctic; (ii) clarify the main determinants of temporal trends observed in indigenous Arctic biomonitoring; (iii) explore the impacts of permanent and temporary dietary transitions on current and future indigenous Arctic contaminant exposures; and (iv) correlate modeled early-life pollutant exposures with measured health impacts. The review demonstrates the effectiveness of mechanistic model approaches in investigating indigenous Arctic contaminant exposure, and confirms their utility in continued improvements to understanding associated risk in this unique population context.
Publisher
Canadian Science Publishing
Subject
General Environmental Science
Reference107 articles.
1. Organochlorine Residue Levels in Arctic Ringed Seals: Variation with Age and Sex
2. A generic model of human lifetime exposure to persistent organic contaminants: development and application to PCB-101
3. A Terrestrial Food-Chain Bioaccumulation Model for POPs
4. Potential Role of Phospholipids in Determining the Internal Tissue Distribution of Perfluoroalkyl Acids in Biota
5. Armstrong, B., Tofflemire, K., Myles, E., Receveur, O., and Chan, H.M. 2007. Monitoring temporal trends of human environmental contaminants in the NWT. Department of Health and Social Services, Government of the Northwest Territories, Yellowknife, NT.
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