Article (Scientific journals)
Temporal trends of legacy organochlorines in different white-tailed eagle (Haliaeetus albicilla) subpopulations: A retrospective investigation using archived feathers
Sun, Jiachen; Covaci, Adrian; Bustnes, Jan Ove et al.
2020In Environment International, 138, p. 105618
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Keywords :
POPs; Museum collection; Organochlorines; Stable isotopes; Body feathers
Abstract :
[en] Understanding the spatiotemporal patterns of legacy organochlorines (OCs) is often difficult because monitoring practices differ among studies, fragmented study periods, and unaccounted confounding by ecological variables. We therefore reconstructed long-term (1939–2015) and large-scale (West Greenland, Norway, and central Sweden) trends of major legacy OCs using white-tailed eagle (Haliaeetus albicilla) body feathers, to understand the exposure dynamics in regions with different contamination sources and concentrations, as well as the effectiveness of legislations. We included dietary proxies (δ13C and δ15N) in temporal trend models to control for potential dietary plasticity. Consistent with the hypothesised high local pollution sources, levels of polychlorinated biphenyls (PCBs), dichlorodiphenyltrichloroethanes (DDTs) and hexachlorocyclohexanes (HCHs) in the Swedish subpopulation exceeded those in the other subpopulations. In contrast, chlordanes (CHLs) and hexachlorobenzene (HCB) showed higher concentrations in Greenland, suggesting the importance of long-range transport. The models showed significantly decreasing trends for all OCs in Sweden in 1968–2011 except for CHLs, which only decreased since the 1980s. Nevertheless, median concentrations of DDTs and PCBs remained elevated in the Swedish subpopulation throughout the 1970s, suggesting that the decreases only commenced after the implementation of regulations during the 1970s. We observed significant trends of increasing concentrations of PCBs, CHLs and HCB in Norway from the 1930s to the 1970s/1980s and decreasing concentrations thereafter. All OC concentrations, except those of PCBs were generally significantly decreasing in the Greenland subpopulation in 1985-2013. All three subpopulations showed generally increasing proportions of the more persistent compounds (CB 153, p.p′-DDE and β-HCH) and decreasing proportions of the less persistent ones (CB 52, p.p′-DDT, α- and γ-HCH). Declining trends of OC concentrations may imply the decreasing influence of legacy OCs in these subpopulations. Finally, our results demonstrate the usefulness of archived museum feathers in retrospective monitoring of spatiotemporal trends of legacy OCs using birds of prey as sentinels.
Research center :
FOCUS - Freshwater and OCeanic science Unit of reSearch - ULiège
MARE - Centre Interfacultaire de Recherches en Océanologie - ULiège
Disciplines :
Zoology
Environmental sciences & ecology
Author, co-author :
Sun, Jiachen
Covaci, Adrian
Bustnes, Jan Ove
Jaspers, Veerle L. B.
Helander, Björn
Bårdsen, Bård-Jørgen
Boertmann, David
Dietz, Rune
Labansen, Aili Lage
Lepoint, Gilles  ;  Université de Liège - ULiège > Département de Biologie, Ecologie et Evolution > Océanographie biologique
Schulz, Ralf
Malarvannan, Govindan
Sonne, Christian
Thorup, Kasper
Tøttrup, Anders P.
Zubrod, Jochen P.
Eens, Marcel
Eulaers, Igor
More authors (8 more) Less
Language :
English
Title :
Temporal trends of legacy organochlorines in different white-tailed eagle (Haliaeetus albicilla) subpopulations: A retrospective investigation using archived feathers
Publication date :
May 2020
Journal title :
Environment International
ISSN :
0160-4120
eISSN :
1873-6750
Publisher :
Elsevier, United Kingdom
Volume :
138
Pages :
105618
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 12 March 2020

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