La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Net methylmercury production as a basis for improved risk assessment of mercury-contaminated sediments
Auteurs :	Ulf Skyllberg, Auteur ; Andreas Drott, Auteur ; Lars Lambertsson, Auteur ; Erik Bjorn, Auteur ; Torbjorn Karlsson, Auteur ; Torbjorn Johnson, Auteur ; Sven-Ake Heinemo, Auteur ; Henning Holmstrm, Auteur
Type de document :	Article
Dans :	AMBIO (36(6) SEP 2007)
Article en page(s) :	437-442
Langues:	Anglais
Résumé :	Sediments contaminated by various sources of mercury (Hg) were studied at 8 sites in Sweden covering wide ranges of climate, salinity, and sediment types. At all sites, biota (plankton, sediment living organisms, and fish) showed enhanced concentrations of Hg relative to corresponding organisms at nearby reference sites. The key process determining the risk at these sites is the net transformation of inorganic Hg to the highly toxic and bioavailable methylmercury (MeHg). Accordingly, Hg concentrations in Perca fluviatilis were more strongly correlated to MeHg (p

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