Perfluoroalkyl Substances in Seabird Eggs from Canada's Pacific Coast;Temporal Trends(1973-2019)and Interspecific Patterns

Robert Kesic; John E.Elliott; Kyle H.Elliott

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Perfluoroalkyl Substances in Seabird Eggs from Canada's Pacific Coast;Temporal Trends(1973-2019)and Interspecific Patterns

机译：Perfluoroalkyl Substances in Seabird Eggs from Canada's Pacific Coast;Temporal Trends(1973-2019)and Interspecific Patterns

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Whether perfluoroalkyl sulfonates(PFSAs)and perfluoroalkyl carboxylates(PFCAs)are responding to legislative restrictions and showing decreasing trends in top marine predators that range across the eastern North Pacific Ocean is unclear.Here,we examined longer-term temporal trends(1973-2019)of 4 PFSAs and 13 PFCAs,as well stable isotopes of δ~(13)C and δ~(15)N,in the eggs of 4 seabird species sampled along a nearshore-offshore gradient;double-crested cormorants(Nannopterum auritum),pelagic cormorants(Urile pelagicus),rhinoceros auklets(Cerorhinca monocerata),and Leach's storm-petrels(Hydrobates leucorhous)from the Pacific coast of British Columbia,Canada.PFOS was the most abundant PFSA(79-94%)detected in all eggs regardless of colony and year,with the highest concentrations,on average,measured in auklet eggs(mean = 58 ng g~(-1),range = 11-286 ng g~(-1)ww).Perfluoroundecanoic acid(PFUdA)and perfluorotridecanoic acid(PFTriDA)were the dominant long-chain PFCAs(>30% combined).The majority of PFSAs(including PFOS)are statistically declining(p<0.001)in the eggs of all 4 species with PFOS half-lives ranging from 2.6 to 7.8 years.Concentrations of long-chain PFCAs exhibited a trajectory comprised of linear increases and second-order declines,suggesting that the rate of uptake of PFCAs is slowing or leveling of f.These trends are consistent with the voluntarily ceased production of PFSAs by 3M circa 2000-2003 and are among the first from the northeast Pacific to indicate a positive response to several regulations and restrictions on PFCAs from facility emissions and product content.

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《Environmental Science & Technology: ES&T》 |2023年第29期|10792-10803|共12页
作者
Robert Kesic; John E.Elliott; Kyle H.Elliott;
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作者单位

Wildlife Research Division,Environment and Climate Change Canada,Delta V4K 3N2 British Columbia,Canada;

Department of Natural Resource Sciences,McGill University,Sainte Anne-de-Belkvue H3A 0G4 Quebec,Canada;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
原文格式 PDF
正文语种英语
中图分类环境科学、安全科学;
关键词
seabird eggs; PFOS; PFASs; long-chain PFCAs; temporal trends;

Perfluoroalkyl Substances in Seabird Eggs from Canada's Pacific Coast;Temporal Trends(1973-2019)and Interspecific Patterns

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