Mercury accumulation in marine bivalves: Influences of biodynamics and feeding niche

► Significant difference in Hg accumulation and MeHg:THg ratio in different bivalves. ► THg concentrations in the bivalves were generally related to the efflux rates of Hg(II). ► Elimination of Hg(II) and MeHg controlled the interspecific variation in MeHg:THg ratio. ► MeHg and THg concentrations reflect the interaction of Hg biodynamics and food.