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首页> 外文期刊>Environmental Science & Technology >Evidence for Elevated Production of Methylmercury in Salt Marshes
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Evidence for Elevated Production of Methylmercury in Salt Marshes

机译：盐沼中甲基汞产量增加的证据

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Depth variations of total mercury (Hg) and methylmercury (MeHg) concentrations were obtained in cores from nonvegetated sediments, sediments colonized by Sarcocornia fruticosa, Halimione portulacoides, and Spartina maritima and below-ground biomass in three Portuguese estuaries. Similar analyses were also performed on the above-ground plant tissues. Concentrations in below-ground biomass exceeded up to 9 (Hg) and 44 (MeHg) times the levels in sediments. Mercury and MeHg in below-ground biomass were up to 400 (Hg) and 4700 (MeHg) times higher than those found in above-ground parts, indicating a weak upward translocation. Methylmercury in colonized sediments reached 18% of the total Hg, which was 70 times above the maximum values found in nonvegetated sediments.
机译：在三个葡萄牙河口的非植被沉积物，由Sarcocornia fruticosa，Halimione portulacoides和Spartina maritima定居的沉积物以及地下生物质中，获得了岩心中总汞（Hg）和甲基汞（MeHg）浓度的深度变化。对地上植物组织也进行了类似的分析。地下生物量的浓度最高超过沉积物水平的9（Hg）和44（MeHg）倍。地下生物量中的汞和MeHg分别比地上部分高400倍（Hg）和4700倍（MeHg），表明向上迁移较弱。殖民地沉积物中的甲基汞达到总汞的18％，比非植被沉积物中的最大值高70倍。

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