Accumulation of mercury and methylmercury by mushrooms and earthworms from forest soils

► Hg and MeHg concentrations in mushrooms and earthworms at unpolluted forest soils. ► Mushrooms and earthworms contained similar Hg concentrations. ► MeHg was present in traces but four times higher in earthworms than in mushrooms. ► Ecophysiological group influenced Hg and MeHg concentration in both receptors.