{"id":118924,"date":"2026-09-11T21:49:33","date_gmt":"2026-09-11T19:49:33","guid":{"rendered":"https:\/\/nilu.gnist.dev\/publikasjoner\/perfluoroalkyl-substance-concentrations-in-a-terrestrial-raptor-relationships-to-environmental-conditions-and-individual-traits\/"},"modified":"2026-09-11T21:49:33","modified_gmt":"2026-09-11T19:49:33","slug":"perfluoroalkyl-substance-concentrations-in-a-terrestrial-raptor-relationships-to-environmental-conditions-and-individual-traits","status":"publish","type":"nva_publication","link":"https:\/\/nilu.gnist.dev\/en\/publications\/perfluoroalkyl-substance-concentrations-in-a-terrestrial-raptor-relationships-to-environmental-conditions-and-individual-traits\/","title":{"rendered":"Perfluoroalkyl substance concentrations in a terrestrial raptor: Relationships to environmental conditions and individual traits"},"content":{"rendered":"<p class=\"wp-block-paragraph\">Accumulation of persistent organic pollutants (POPs) in wildlife may be influenced by the physical and biotic environment, and<br \/>\nconcentrations vary greatly among areas, seasons, and individuals. Different hypotheses about sources of variation in perfluoroalkyl<br \/>\nsubstance (PFAS) concentrations were examined in eggs (n\u00bc107) of tawny owls (Strix aluco) collected over a 24-yr period (1986\u20132009)<br \/>\nin Norway. Predictor variables included the North Atlantic Oscillation (NAO), temperature, snow, food availability (vole abundance), and<br \/>\nindividual traits such as age, body condition, and clutch size. Concentrations of both perfluoro-octane sulfonate (PFOS) and perfluoroalkyl<br \/>\ncarboxylates (PFCAs) varied several fold in the population, both inter- and intra-annually. Moreover, individuals laid eggs with several<br \/>\ntimes higher or lower PFAS concentrations within few years (1 yr\u20135 yr). After controlling for temporal trends (i.e., declining PFOS and<br \/>\nincreasing PFCA concentrations), both PFOS and PFCAs were positively associated to the winter NAO in the previous year (NAOy \u2013 1),<br \/>\nsuggesting that atmospheric transport may be affecting the input of PFASs to the local ecosystem. Perfluoro-octane sulfonate was<br \/>\nnegatively related to temperature, but the pattern was complex as there was an interaction between temperature and the feeding conditions.<br \/>\nThe PFOS accumulation was highest in years with high vole abundance and low to medium temperatures. For PFCAs, there was an<br \/>\ninteraction between NAOy \u2013 1 and feeding conditions, suggesting that strong air transport toward Norway and high consumption of voles<br \/>\nled to a moderate increase in PFCA accumulation. The individual traits, however, had very little impact on the concentrations of PFASs in<br \/>\nthe eggs. The present study thus suggests that annual variation in environmental conditions influences the concentrations of PFASs in a<br \/>\nterrestrial raptor such as the tawny owl. Environ Toxicol Chem 2014;9999:1\u20138. # 2014 SETAC<br \/>\nKeywords: Perfluoroalkyl substance Owl Climate Age Persistent organic pollutant<\/p>\n","protected":false},"template":"","meta":{"_acf_changed":false,"_searchwp_excluded":"","_id":"","_status":"PUBLISHED","_sync_date":"2026-09-11 14:48:38","footnotes":""},"nva_tax_category":[1099],"class_list":["post-118924","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\/118924","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\/118924\/revisions"}],"wp:attachment":[{"href":"https:\/\/nilu.gnist.dev\/en\/wp-json\/wp\/v2\/media?parent=118924"}],"wp:term":[{"taxonomy":"nva_tax_category","embeddable":true,"href":"https:\/\/nilu.gnist.dev\/en\/wp-json\/wp\/v2\/nva_tax_category?post=118924"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}