{"id":119006,"date":"2026-09-11T21:49:48","date_gmt":"2026-09-11T19:49:48","guid":{"rendered":"https:\/\/nilu.gnist.dev\/publikasjoner\/antioxidant-responses-in-relation-to-persistent-organic-pollutantsand-metals-in-a-low-and-a-high-exposure-population-of-seabirds\/"},"modified":"2026-09-11T21:49:48","modified_gmt":"2026-09-11T19:49:48","slug":"antioxidant-responses-in-relation-to-persistent-organic-pollutantsand-metals-in-a-low-and-a-high-exposure-population-of-seabirds","status":"publish","type":"nva_publication","link":"https:\/\/nilu.gnist.dev\/en\/publications\/antioxidant-responses-in-relation-to-persistent-organic-pollutantsand-metals-in-a-low-and-a-high-exposure-population-of-seabirds\/","title":{"rendered":"Antioxidant Responses in Relation to Persistent Organic Pollutantsand Metals in a Low- and a High-Exposure Population of Seabirds"},"content":{"rendered":"<p class=\"wp-block-paragraph\">Oxidative stress occurs when there is an imbalance between<br \/>\nthe production of reactive oxygen species (ROS) and antioxidant defense.<br \/>\nExposure to pollutants may increase ROS and affect antioxidant levels, and<br \/>\nthe resulting oxidative stress may negatively affect both reproduction and<br \/>\nsurvival. We measured concentrations of 18 persistent organic pollutants<br \/>\n(POPs) and 9 toxic elements in blood, as well as total antioxidant capacity<br \/>\n(TAC), total glutathione (tGSH), and carotenoids in plasma of Baltic and<br \/>\nArctic female common eiders (Somateria mollissima) (N = 54) at the end<br \/>\nof their incubation-related fasting. The more polluted Baltic population<br \/>\nhad higher TAC and tGSH concentrations compared to the Arctic<br \/>\npopulation. Carotenoid levels did not differ between populations. The<br \/>\neffect of mixtures of pollutants on the antioxidants was assessed, and the<br \/>\nsummed molar blood concentrations of 14 POPs were positively related to TAC. There was no significant relationship between<br \/>\nthe analyzed pollutants and tGSH concentrations. The adaptive improvement of the antioxidant defense system in the Baltic<br \/>\npopulation may be a consequence of increased oxidative stress. However, both increased oxidative stress and energy allocation<br \/>\ntoward antioxidant defense may have adverse consequences for Baltic eiders at the incubation stage, when energy resources reach<br \/>\nan annual minimum due to incubation-related fasting.<\/p>\n","protected":false},"template":"","meta":{"_acf_changed":false,"_searchwp_excluded":"","_id":"","_status":"PUBLISHED","_sync_date":"2026-09-11 14:48:50","footnotes":""},"nva_tax_category":[1099],"class_list":["post-119006","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\/119006","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\/119006\/revisions"}],"wp:attachment":[{"href":"https:\/\/nilu.gnist.dev\/en\/wp-json\/wp\/v2\/media?parent=119006"}],"wp:term":[{"taxonomy":"nva_tax_category","embeddable":true,"href":"https:\/\/nilu.gnist.dev\/en\/wp-json\/wp\/v2\/nva_tax_category?post=119006"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}