| trophic calculations reveal the mechanism of population-level variation in mercury concentrations between marine ecosystems: case studies of two polar seabirds. | the incorporation of quantitative trophic level analysis in ecotoxicological studies provides explanatory power to identify the factors, trophic or environmental, driving population-level variation in mercury exposure at large geographic scales. in the antarctic marine ecosystem, mercury concentrations and stable isotope values in adélie penguins (pygoscelis adeliae) were compared between the antarctic peninsula and the ross sea. correcting tissue δ(15)n values for baseline δ(15)n values reveale ... | 2013 | 23993395 |