Variation in bioaccumulation of persistent organic pollutants based on octanol-air partitioning: Influence of respiratory elimination in marine species

MARINE POLLUTION BULLETIN

卷:100

Article

Moses, Sara K.¹  Harley, John R.²  Lieske, Camilla L.³  Muir, Derek C. G.⁴  Whiting, Alex V.⁵  O'Hara, Todd M.⁶ 

[1] Great Lakes Indian Fish & Wildlife Commiss, Biol Serv Div, Environm Sect, Odanah, WI 54861 USA

[2] Univ Alaska Fairbanks, Dept Chem & Biochem, Fairbanks, AK 99775 USA

[3] Univ Alaska Fairbanks, Inst Arctic Biol, Fairbanks, AK 99775 USA

[4] Environm Canada, Aquat Ecosyst Protect Res Div, Burlington, ON L7R 4A6, Canada

[5] Native Village Kotzebue, Kotzebue, AK 99752 USA

[6] Univ Alaska Fairbanks, Dept Vet Med, Fairbanks, AK 99775 USA

关键词: Bioaccumulation;    POPs;    Marine mammals;    OCs;    Arctic;   

DOI  :  10.1016/j.marpolbul.2015.09.020

来源: Elsevier

【 摘 要 】

Risk assessments of persistent organic pollutants (POPs) are often based on octanol-water (K-OW) partitioning dynamics and may not adequately reflect bioaccumulation in air-breathing organisms. It has been suggested that compounds with low K-OW and high octanol-air partitioning (K-OA) coefficients have the potential to bioaccumulate in air-breathing organisms, including marine mammals. Here we evaluate differences in concentrations of POPs for two trophically matched Arctic species, spotted seal (Phoca largha) and sheefish (Stenodus leucichthys). We compared concentrations of 108 POPs in matched tissues (liver and muscle) across three ranges of K-OW. We found a significant positive correlation between POP concentration and log K-OA in spotted seal tissues for low log K-OW compounds ( log K-OW <5.5, p < 0.05). This provides further evidence for empirical models and observed bioaccumulation patterns in air-breathing organisms, and highlights the potential for bioaccumulation of these compounds in Arctic marine mammals. (C) 2015 Elsevier Ltd. All rights reserved.

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