Deposition and Cycling of Sulfur Controls Mercury Accumulation in Isle Royale Fish

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• 作者：Paul E. Drevnick ; Donald E. Canfield ; Patrick R. Gorski ; Avery L. C. Shinneman ; Daniel R. Engstrom ; Derek C. G. Muir ; Gerald R. Smith ; Paul J. Garrison ; Lisa B. Cleckner ; James P. Hurley ; Robert B. No
• 刊名：Environmental Science & Technology
• 出版年：2007
• 出版时间：November 1, 2007
• 年：2007
• 卷：41
• 期：21
• 页码：7266 - 7272
• 全文大小：252K
• 年卷期：v.41,no.21(November 1, 2007)
• ISSN：1520-5851

文摘

Mercury contamination of fish is a global problem.Consumption of contaminated fish is the primary route ofmethylmercury exposure in humans and is detrimental tohealth. Newly mandated reductions in anthropogenicmercury emissions aim to reduce atmospheric mercurydeposition and thus mercury concentrations in fish. However,factors other than mercury deposition are important formercury bioaccumulation in fish. In the lakes of Isle Royale,U.S.A., reduced rates of sulfate deposition since theClean Air Act of 1970 have caused mercury concentrationsin fish to decline to levels that are safe for humanconsumption, even without a discernible decrease inmercury deposition. Therefore, reductions in anthropogenicsulfur emissions may provide a synergistic solution tothe mercury problem in sulfate-limited freshwaters.