Latitudinal exposure to DDTs, HCB, PCBs, PBDEs and DP in giant petrels (Macronectes spp.) across the Southern Ocean

摘要: Studies on Persistent Organic Pollutants (POPs) in Antarctic wildlife are scarce, and usually limited to a single locality. As result, exposure POPs across the Southern Ocean is poorly understood. In this study, we report differential of major southern ocean scavengers, giant petrels, wide latitudinal gradient. Selected (PCBs, HCB, DDTs, PBDEs) related compounds, such as Dechlorane Plus (DP), were analyzed plasma petrels (Macronectes giganteus) breeding Livingston (62°S 61°W, Antarctica), Marion (46°S 37°E, sub-Antarctic), Gough (40°S 10°W, cool temperate) islands. Northern halli) from Island also studied. Stable isotope ratios C N (δ(13)C δ(15)N) used dietary tracers marine habitat trophic level, respectively. Breeding locality was factor explaining petrel compared with species sex. Significant relationships between δ(13)C values POP burdens, at both inter- intra-population levels, support variations feeding grounds key pollutant burdens. Overall, levels decreased significantly latitude, but relative abundance (%) more volatile increased towards Antarctica. DP found negligible legacy seabirds. Spatial patterns match those predicted by global distribution models, reinforce hypothesis atmospheric long-range transport main source Our results confirm that movements out polar region markedly increase their POPs. Therefore, strategies for conservation should consider spatial heterogeneity pollution. Of particular relevance need clarify predators emerging contaminants not yet globally regulated.