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Mercury Mass Budget Estimates and Cycling Seasonally in the Florida Everglades

机译：佛罗里达大沼泽地的水银大量预算估算和季节性骑行

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摘要

We estimated the mass budget for mercury (Hg) seasonally deposited into the Florida Everglades and investigated seasonality of Hg cycling by analyzing data obtained for water, soil, flocculent detrital material (floe), periphyton, and mosquitofish collected throughout the Everglades freshwater marshes in the 2005 dry and wet seasons. Higher wet season total Hg (THg) in soil, floe, and periphyton agreed with greater Hg amounts entering these compartments during the wet season, probably owing to substantially greater Hg deposition in the wet season than in the dry season. Seasonal differences were absent for THg in surface water. Methylmercury(MeHg) showed mixed seasonal patterns,"With higher water and soil MeHg and lower periphyton MeHg in the dry season but no seasonality for floe MeHg. Seasonal variations in Hg deposition, MeHg production and transport, and mass of ecosystem compartments could be responsible for the seasonality of MeHg cycling. Higher mosquitofish THg, higher bioaccumulation factors, and higher biomagnification factors from periphyton to mosquitofish were observed in the wet season than in the dry season, indicating that the wet season is more favorable for Hg bioaccumulation. The mass budget estimation agreed with this result.
机译：我们通过分析在整个大沼泽地淡水沼泽中收集的水，土壤，絮状碎屑物质（浮点），浮游植物和蚊鱼的数据来估算季节性沉积到佛罗里达大沼泽地的汞的总体预算，并调查了汞循环的季节性。 2005年干燥和潮湿的季节。土壤，絮凝物和浮游植物中较高的湿季总Hg（THg）表示在湿季进入这些隔间的汞含量较高，这可能是由于湿季中的Hg沉积量明显多于旱季。地表水中THg缺乏季节性差异。甲基汞表现出不同的季节模式，“旱季水和土壤的甲基汞含量较高，而浮游植物的甲基汞含量较低，而絮凝物甲基汞则没有季节性。汞沉积的季节性变化，甲基汞的生产和运输以及生态系统隔室的质量可能是造成这种情况的原因。在MeHg循环的季节性方面，湿季观测到较高的蚊鱼THg，较高的生物积累因子和从附生植物到蚊鱼的生物放大因子，高于旱季，表明湿季更有利于Hg的生物积累。估计结果与此一致。

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