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Temporal trends of persistent organic pollutants in Arctic marine and freshwater biota

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  • Frank Riget
  • Anders Bignert, Swedish Museum Nat Hist, Swedish Museum of Natural History, Dept Environm Res & Monitoring
  • ,
  • Birgit Braune, Carleton Univ, Canadian Wildlife Service, Carleton University, National Wildelife Research Centre - Canada, Environment & Climate Change Canada, Natl Wildlife Res Ctr, Environm & Climate Change Canada, Ecotoxicol & Wildlife Hlth Div,Sci & Technol Bran
  • ,
  • Maria Dam, Environm Invest Agcy
  • ,
  • Rune Dietz
  • Marlene Evans, Environm Canada, Environment & Climate Change Canada, Aquat Ecosyst Protect Res Div
  • ,
  • Norman Green, Norwegian Inst Water Res NIVA, Norwegian Institute for Water Research (NIVA)
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  • Helga Gunnlaugsdottir, Matis Ltd., Iceland Food and Biotech R&D
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  • Katrin S. Hoydal, Environm Invest Agcy
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  • John Kucklick, Natl Inst Stand & Technol, National Institute of Standards & Technology (NIST) - USA, Hollings Marine Lab
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  • Robert Letcher, Carleton Univ, Canadian Wildlife Service, Carleton University, National Wildelife Research Centre - Canada, Environment & Climate Change Canada, Natl Wildlife Res Ctr, Environm & Climate Change Canada, Ecotoxicol & Wildlife Hlth Div,Sci & Technol Bran
  • ,
  • Derek Muir, Environm & Climate Change Canada, Environment & Climate Change Canada, Aquat Contaminants Res Div
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  • Stacy Schuur, Natl Inst Stand & Technol, National Institute of Standards & Technology (NIST) - USA, Hollings Marine Lab
  • ,
  • Christian Sonne
  • Gary Stern, Univ Manitoba, University of Manitoba, Clayton H Riddell Fac Environm Earth & Resources, CEOS
  • ,
  • Gregg Tomy, Univ Manitoba, University of Manitoba, Dept Chem, Ctr Oil & Gas Res & Dev
  • ,
  • Katrin Vorkamp
  • Simon Wilson, Arctic Monitoring & Assessment Programme AMAP Sec

More than 1000 time-series of persistent organic pollutants (POPs) in Arctic biota from marine and freshwater ecosystems some extending back to the beginning of 1980s were analyzed using a robust statistical method. The Arctic area encompassed extended from Alaska, USA in the west to northern Scandinavian in the cast, with data gaps for Arctic Russia and Arctic Finland. The aim was to investigate whether temporal trends for different animal groups and matrices were consistent across a larger geographical area. In general, legacy POPs showed decreasing concentrations over the last two to three decades, which were most pronounced for aHCH and least pronounced for HCB and p-HCH. Few lime-series of legacy POPs showed increasing trends and only at sites suspected to be influenced by local source. The brominated flame retardant congener BDE-47 showed a typical trend of increasing concentration up to approximately the mid-2000s followed by a decreasing concentration. A similar trend was found for perfluorooctane sulfonic add (PFOS). These trends are likely related to the relatively recent introduction of national and international controls of hexa- and hepta-BDE congeners and the voluntary phase-out of PFOS production in the USA in 2000. Hexabromocyclododecane (HBCDD) was the only compound in this study showing a consistent increasing trend. Only 12% of the long-term time-series were able to detect a 5% annual change with a statistical power of 80% at alpha <0.05. The remaining 88% of time-series need additional years of data collection before fulfilling these statistical requirements. In the case of the organochlorine long-term time-series, 45% of these would require >20 years monitoring before this requirement would be fulfilled. (C) 2018 Elsevier B.V. All tights reserved.

OriginalsprogEngelsk
TidsskriftScience of the Total Environment
Vol/bind649
Sider (fra-til)99-110
Antal sider12
ISSN0048-9697
DOI
StatusUdgivet - 1 feb. 2019

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