Current state of knowledge on biological effects from contaminants on arctic wildlife and fish

Last modified: 
December 13, 2019 - 12:32pm
Type: Journal Article
Year of publication: 2019
Date published: 08/2019
Authors: Rune Dietz, Robert Letcher, Jean-Pierre Desforges, Igor Eulaers, Christian Sonne, Simon Wilson, Emilie Andersen-Ranberg, Niladri Basu, Benjamin Barst, Jan Bustnes, Jenny Bytingsvik, Tomasz Ciesielski, Paul Drevnick, Geir Gabrielsen, Ane Haarr, Ketil Hylland, Bjørn Jenssen, Milton Levin, Melissa McKinney, Rasmus Nørregaard, Kathrine Pedersen, Jennifer Provencher, Bjarne Styrishave, Sabrina Tartu, Jon Aars, Joshua Ackerman, Aqqalu Rosing-Asvid, Rob Barrett, Anders Bignert, Erik Born, Marsha Branigan, Birgit Braune, Colleen Bryan, Maria Dam, Collin Eagles-Smith, Marlene Evans, Thomas Evans, Aaron Fisk, Mary Gamberg, Kim Gustavson, Alex Hartman, Björn Helander, Mark Herzog, Paul Hoekstra, Magali Houde, Katrin Hoydal, Allyson Jackson, John Kucklick, Elisabeth Lie, Lisa Loseto, Mark Mallory, Cecilie Miljeteig, Anders Mosbech, Derek Muir, Sanna Nielsen, Elizabeth Peacock, Sara Pedro, Sarah Peterson, Anuschka Polder, Frank Rigét, Pat Roach, Halvor Saunes, Mikkel-Holger Sinding, Janneche Skaare, Jens Søndergaard, Garry Stenson, Gary Stern, Gabriele Treu, Stacy Schuur, Gísli Víkingsson
Journal title: Science of The Total Environment
Pages: 133792
ISSN: 00489697

Since the last Arctic Monitoring and Assessment Programme (AMAP) effort to review biological effects of the exposure to organohalogen compounds (OHCs) in Arctic biota, there has been a considerable number of new Arctic effect studies. Here, we provide an update on the state of the knowledge of OHC, and also include mercury, exposure and/or associated effects in key Arctic marine and terrestrial mammal and bird species as well as in fish by reviewing the literature published since the last AMAP assessment in 2010. We aimed at updating the knowledge of how single but also combined health effects are or can be associated to the exposure to single compounds or mixtures of OHCs. We also focussed on assessing both potential individual as well as population health impacts using population-specific exposure data post 2000. We have identified quantifiable effects on vitamin metabolism, immune functioning, thyroid and steroid hormone balances, oxidative stress, tissue pathology, and reproduction. As with the previous assessment, a wealth of documentation is available for biological effects in marine mammals and seabirds, and sentinel species such as the sledge dog and Arctic fox, but information for terrestrial vertebrates and fish remain scarce. While hormones and vitamins are thoroughly studied, oxidative stress, immunotoxic and reproductive effects need further investigation. Depending on the species and population, some OHCs and mercury tissue contaminant burdens post 2000 were observed to be high enough to exceed putative risk threshold levels that have been previously estimated for non-target species or populations outside the Arctic. In this assessment, we made use of risk quotient calculations to summarize the cumulative effects of different OHC classes and mercury for which critical body burdens can be estimated for wildlife across the Arctic. As our ultimate goal is to better predict or estimate the effects of OHCs and mercury in Arctic wildlife at the individual, population and ecosystem level, there remain numerous knowledge gaps on the biological effects of exposure in Arctic biota. These knowledge gaps include the establishment of concentration thresholds for individual compounds as well as for realistic cocktail mixtures that in fact indicate biologically relevant, and not statistically determined, health effects for specific species and subpopulations. Finally, we provide future perspectives on understanding Arctic wildlife health using new in vivo, in vitro, and in silico techniques, and provide case studies on multiple stressors to show that future assessments would benefit from significant efforts to integrate human health, wildlife ecology and retrospective and forecasting aspects into assessing the biological effects of OHC and mercury exposure in Arctic wildlife and fish.

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