Hibernation-associated changes in persistent organic pollutant (POP) levels and patterns in British Columbia grizzly bears (ursus arctos horribilis).
作者： Jennie R. Christensen , Misty MacDuffee , Mark B. Yunker , Peter S. Ross
DOI: 10.1021/ES0626335
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摘要: We hypothesized that depleted fat reserves in grizzly bears (Ursus arctos horribilis) following annual hibernation would reveal increases persistent organic pollutant (POP) concentrations compared to those present the fall. obtained and hair from British Columbia early spring 2004 compare with collected fall 2003, two tissue types providing contaminant dietary information, respectively. By correcting for individual feeding habits of grizzlies using a stable isotope-based approach, we found polychlorinated biphenyls (ΣPCBs) increased by 2.21×, polybrominated diphenylethers (ΣPBDEs) 1.58×, chlordanes (ΣCHL) 1.49× hibernation. Interestingly, POPs elicited wide range hibernation-associated concentration effects (e.g., CB-153, 2.25× vs CB-169, 0.00×), resulting POP pattern convergence PCA model distinct groups (salmon-eating non-salmon-eating) into single ...
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