Monomethylmercury (MeHg) in fish from freshwater, estuarine, and marine environments is
a major global environmental issue. Mercury levels in biota are mainly controlled by the
methylation of inorganic mercuric mercury (HgII) to MeHg in water, sediments, and soils.
There is, however, a knowledge gap concerning the mechanisms and rates of methylation of
specific geochemical HgII species. Such information is crucial for a better understanding of
variations in MeHg concentrations among ecosystems and, in particular, for predicting the …