{"id":119205,"date":"2026-09-11T21:50:11","date_gmt":"2026-09-11T19:50:11","guid":{"rendered":"https:\/\/nilu.gnist.dev\/publikasjoner\/ecological-and-spatial-factors-drive-intra-and-interspecific-variation-in-exposure-of-subarctic-predatory-bird-nestlings-to-persistent-organic-pollutants\/"},"modified":"2026-09-11T21:50:11","modified_gmt":"2026-09-11T19:50:11","slug":"ecological-and-spatial-factors-drive-intra-and-interspecific-variation-in-exposure-of-subarctic-predatory-bird-nestlings-to-persistent-organic-pollutants","status":"publish","type":"nva_publication","link":"https:\/\/nilu.gnist.dev\/en\/publications\/ecological-and-spatial-factors-drive-intra-and-interspecific-variation-in-exposure-of-subarctic-predatory-bird-nestlings-to-persistent-organic-pollutants\/","title":{"rendered":"Ecological and spatial factors drive intra- and interspecific variation in exposure of subarctic predatory bird nestlings to persistent organic pollutants"},"content":{"rendered":"<p class=\"wp-block-paragraph\">Top predators in northern ecosystems may suffer from exposure to persistent organic pollutants (POPs) as this<br \/>\nexposure may synergistically interact with already elevated natural stress in these ecosystems. In the present<br \/>\nstudy, we aimed at identifying biological (sex, body condition), ecological (dietary carbon source, trophic<br \/>\nlevel) and spatial factors (local habitat, regional nest location) that may influence intra- and interspecific variation<br \/>\nin exposure of subarctic predatory bird nestlings to polychlorinated biphenyl 153 (CB 153), polybrominated<br \/>\ndiphenyl ether 47 (BDE 47), dichlorodiphenyldichloroethylene (p,p\u2032-DDE) and hexachlorobenzene (HCB). During<br \/>\nthree breeding seasons (2008\u20132010), we sampled body feathers from fully-grown nestlings of three ecologically<br \/>\ndistinct predatory bird species in subarctic Norway: Northern Goshawk (Accipiter gentilis), White-tailed<br \/>\nEagle (Haliaeetus albicilla) and Golden Eagle (Aquila chrysaetos). The present study analysed, for the first time,<br \/>\nbody feathers for both POPs and carbon (\u03b413C) and nitrogen (\u03b415N) stable isotopes, thus integrating the dietary<br \/>\ncarbon source, trophic level and POP exposure for the larger part of the nestling stage.<br \/>\nIntraspecific variation in exposure was driven by a combination of ecological and spatial factors, often different<br \/>\nfor individual compounds. In addition, combinations for individual compounds differed among species.<br \/>\nTrophic level and local habitat were the predominant predictors for CB 153, p,p\u2032-DDE and BDE 47, indicating<br \/>\ntheir biomagnification and decreasing levels according to coast &gt; fjord &gt; inland. Variation in exposure may<br \/>\nalso have been driven by inter-annual variation arisen from primary sources (e.g. p,p\u2032-DDE) and\/or possible<br \/>\nrevolatilisation from secondary sources (e.g. HCB). Interspecific differences in POP exposure were best<br \/>\nexplained by a combination of trophic level (biomagnification), dietary carbon source (food chain discrimination)<br \/>\nand regional nest location (historical POP contamination).<br \/>\nIn conclusion, the combined analysis of POPs and stable isotopes in body feathers from fully-grown nestlings<br \/>\nhas identified ecological and spatial factors that may drive POP exposure over the larger part of the nestling<br \/>\nstage. This methodological approach further promotes the promising use of nestling predatory bird body<br \/>\nfeathers as a non-destructive sampling strategy to integrate various toxicological and ecological proxies<br \/>\n\u03b413C,\u03b415N,body feather,biomagnification, habitat,stable isotope   <\/p>\n","protected":false},"template":"","meta":{"_acf_changed":false,"_searchwp_excluded":"","_id":"","_status":"PUBLISHED","_sync_date":"2026-09-11 14:59:46","footnotes":""},"nva_tax_category":[1099],"class_list":["post-119205","nva_publication","type-nva_publication","status-publish","hentry","nva_tax_category-scientific-journal-publication"],"acf":[],"_links":{"self":[{"href":"https:\/\/nilu.gnist.dev\/en\/wp-json\/wp\/v2\/nva_publication\/119205","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/nilu.gnist.dev\/en\/wp-json\/wp\/v2\/nva_publication"}],"about":[{"href":"https:\/\/nilu.gnist.dev\/en\/wp-json\/wp\/v2\/types\/nva_publication"}],"version-history":[{"count":0,"href":"https:\/\/nilu.gnist.dev\/en\/wp-json\/wp\/v2\/nva_publication\/119205\/revisions"}],"wp:attachment":[{"href":"https:\/\/nilu.gnist.dev\/en\/wp-json\/wp\/v2\/media?parent=119205"}],"wp:term":[{"taxonomy":"nva_tax_category","embeddable":true,"href":"https:\/\/nilu.gnist.dev\/en\/wp-json\/wp\/v2\/nva_tax_category?post=119205"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}