4.7 Article

Perfluoroalkylated compounds in the eggs and feathers of resident and migratory seabirds from the Antarctic Peninsula

Journal

ENVIRONMENTAL RESEARCH
Volume 214, Issue -, Pages -

Publisher

ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.envres.2022.114157

Keywords

PFAA; Perfluorinated substances; PFOS; Biomonitoring; Contamination; Stable isotopes

Funding

  1. Research Foundation Flanders (FWO) [G038615N, G018119N, 12ZZQ21N]
  2. FWO [12ZZQ21N]
  3. Brazilian National Council for Scientific and Technological Development (CNPq) [CNPq/MCT 557049/2009-1]
  4. Universal Call CNPq-Project from PRD [432518/2016-9]
  5. Brazilian Foundation for the Coordination and Improvement of Higher Level or Education Personnel (CAPES) [88881.154725/2017-01, 88887.154724/2017-00]
  6. Wallonie Bruxelles International (WBI, from Belgium)
  7. Rio de Janeiro State Government Research Agency (FAPERJ) [E-26/111.505/2010]
  8. CNPq [306703/2014-9, 306847/2016-7]

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This study investigated the factors influencing the differences in PFAA exposure among different species of Antarctic seabirds, and found that trophic position and foraging area were correlated with PFAA concentrations. The results suggest that long-distance migratory birds may play a role in the transport of pollutants in the Antarctic environment.
In this study, we investigated factors that influence the differences in exposure of perfluoroalkyl acids (PFAAs) from eight species of Antarctic seabirds, including Pygoscelis penguins, Stercorarius maccormicki, and Macronectes giganteus. We analyzed the relationship between foraging ecology (based on delta C-13, delta N-15, and delta S-34 values) and PFAAs accumulated in eggs and breast feathers. Ten out of 15 targeted PFAAs were detected in eggs compared to eight in feathers. Mean Sigma PFAA concentrations in feathers ranged from 0.47 in P. antarcticus to 17.4 ng/g dry weight (dw) in S. maccormicki. In eggs, Sigma PFAA concentrations ranged from 3.51 in P. adeliae to 117 ng/g dw in S. maccormicki. The highest concentrations of most PFAAs were found in trans-equatorial migrators such as S. maccormicki, probably due their high trophic position and higher concentrations of PFAAs in the Northern Hemisphere compared to the Southern Hemisphere. Based on stable isotopes correlations, our results suggest that the trophic position (delta N-15) and the foraging area (delta C-13 and delta S-34) influence PFAAs concentrations in Antarctic seabirds. Our results point to the possibility that long-distance migratory birds may have as bio-vectors in the transport of pollutants, including PFCAs, in Antarctic environments, although this must be further confirmed in future studies using a mass balanced approach, such as extractable organofluorine (EOF).

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