Temporal trends of mercury in Arctic biota: 10 more years of progress in Arctic monitoring

作者：Adam D. Morris, Simon Wilson, R. J. Fryer, Philippe J. Thomas, Karista Hudelson, Birgitta Andreasen, Pierre Blévin, Paco Bustamante, Olivier Chastel, Guttorm Christensen, Runé Dietz, Marlene S. Evans, Anita Evenset, Steven H. Ferguson, Jérôme Fort, Mary Gamberg, David Grémillet, Magali Houde, Robert J. Letcher, Lisa L. Loseto, Derek C. G. Muir, Marianna Pinzone, Amanda Poste, Heli Routti, Christian Sonne, Gary Stern, Frank F. Rigét · 发表于：The Science of The Total Environment · 年份：2022 · DOI：10.1016/j.scitotenv.2022.155803 · 被引用次数：45 · 研究领域：Mercury impact and mitigation studies、Atmospheric and Environmental Gas Dynamics、Toxic Organic Pollutants Impact

Temporal trend analysis of (total) mercury (THg) concentrations in Arctic biota were assessed as part of the 2021 Arctic Monitoring and Assessment Programme (AMAP) Mercury Assessment. A mixed model including an evaluation of non-linear trends was applied to 110 time series of THg concentrations from Arctic and Subarctic biota. Temporal trends were calculated for full time series (6-46 years) and evaluated with a particular focus on recent trends over the last 20 years. Three policy-relevant questions were addressed: (1) What time series for THg concentrations in Arctic biota are currently available? (2) Are THg concentrations changing over time in biota from the Arctic? (3) Are there spatial patterns in THg trends in biota from the Arctic? Few geographical patterns of recent trends in THg concentrations were observed; however, those in marine mammals tended to be increasing at more easterly longitudes, and those of seabirds tended to be increasing in the Northeast Atlantic; these should be interpreted with caution as geographic coverage remains variable. Trends of THg in freshwater fish were equally increasing and decreasing or non-significant while those in marine fish and mussels were non-significant or increasing. The statistical power to detect trends was greatly improved compared to the 2011 AMAP Mercury Assessment; 70% of the time series could detect a 5% annual change at the 5% significance level with power ≥ 80%, while in 2011 only 19% met these criteria. Extending ex...