Deliang Yin

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1 Introduction Dam construction can evidently alter the original environment of riverine systems, such as flow velocity, hydraulic retention time, sediment discharge, primary productivity, nutrient retention and reoxygenation capacity, and ultimately regulate the accumulation, distribution, and transportation of toxic metals (Maavara et al., 2020; Bing et al., 2022).

Abstract Soil properties largely control the fate of mercury (Hg), including the synthesis of neurovirulent methylmercury (MeHg). Here, the freshwater snail (Cipangopaludina cahayensis), a snail species commonly bred in flooded farmland, was used in a test of biotoxicity exposure to explore the effects of soil components on Hg bioavailability.