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dc.contributor.authorBustnes, Jan Ove
dc.contributor.authorBårdsen, Bård-Jørgen
dc.contributor.authorMoe, Børge
dc.contributor.authorHerzke, Dorte
dc.contributor.authorBallesteros, Manuel
dc.contributor.authorFenstad, Anette
dc.contributor.authorBorgå, Katrine
dc.contributor.authorKrogseth, Ingjerd Sunde
dc.contributor.authorEulaers, Igor
dc.contributor.authorSkogeng, Lovise Pedersen
dc.contributor.authorGabrielsen, Geir Wing
dc.contributor.authorHanssen, Sveinn Are
dc.identifier.citationScience of the Total Environment. 2023, 908, 168096.en_US
dc.description.abstractThe present study examined how climate changes may impact the concentrations of lipophilic organochlorines (OCs) in the blood of fasting High Arctic common eiders (Somateria mollissima) during incubation. Polychlorinated biphenyls (PCBs), 1-dichloro-2,2-bis (p-chlorophenyl) ethylene (p,p′-DDE), hexachlorobenzene (HCB) and four chlordane compounds (oxychlordane, trans-chlordane and trans- and cis-nonachlor) were measured in females at chick hatching (n = 223) over 11 years (2007–2017). Firstly, median HCB and p,p′-DDE concentrations increased ~75 % over the study period, whereas median chlordane concentrations doubled (except for oxychlordane). PCB concentrations, in contrast, remained stable over the study period. Secondly, both body mass and clutch size were negatively associated with OC levels, suggesting that females with high lipid metabolism redistributed more OCs from adipose tissue, and that egg production is an important elimination route for OCs. Thirdly, the direct climate effects were assessed using the mean effective temperature (ET: air temperature and wind speed) during incubation, and we hypothesized that a low ET would increase redistribution of OCs. Contrary to expectation, the ET was positively correlated to most OCs, suggesting that a warmer climate may lead to higher OCs levels, and that the impact of ET may not be direct. Finally, potential indirect impacts were examined using the Arctic Oscillation (AO) in the three preceding winters (AOwinter 1–3) as a proxy for potential long-range transport of OCs, and for local spring climate conditions. In addition, we used chlorophyll a (Chla) as a measure of spring primary production. There were negative associations between AOwinter 1 and HCB, trans-chlordane and trans-nonachlor, whereas oxychlordane and cis-chlordane were negatively associated with Chla. This suggests that potential indirect climate effects on eiders were manifested through the food chain and not through increased long-range transport, although these relationships were relatively weak.en_US
dc.rightsNavngivelse 4.0 Internasjonal*
dc.titleImpacts of a warming climate on concentrations of organochlorines in a fasting high arctic marine bird: Direct vs. indirect effects?en_US
dc.title.alternativeImpacts of a warming climate on concentrations of organochlorines in a fasting high arctic marine bird: Direct vs. indirect effects?en_US
dc.typePeer revieweden_US
dc.typeJournal articleen_US
dc.rights.holder© 2023 The Authors. Published by Elsevier B.V.en_US
dc.source.journalScience of the Total Environmenten_US
dc.relation.projectNorges forskningsråd: 287114en_US
dc.relation.projectNILU: 119008en_US
dc.relation.projectNILU: 122058en_US

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Navngivelse 4.0 Internasjonal
Except where otherwise noted, this item's license is described as Navngivelse 4.0 Internasjonal