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Blackfly Larvae (Simulium spp.) Can Intensify Methylmercury Biomagnification in Boreal Food WebsNARA Subscribed
Global pollution of mercury (Hg) threatens ecosystem and human health. We measured total Hg (THg) and monomethylmercury (MMHg) concentrations in filter-feeding blackfly ( Simulium spp.) larvae in the inflows and the outflows of six boreal lakes with no Hg point source pollution. THg in the larvae ranged from 0.03 to 0.31 mg kg −1 dw and MMHg between 0.02 and 0.25 mg kg −1 dw. The proportion of MMHg in the larvae was 74 ± 0.16%...
Mercury speciation and Hg stable isotope ratios in sediments from Amazon floodplain lakes—BrazilNARA Subscribed
Hg concentrations and isotope ratios were measured to better characterize the mercury dynamics related to Hg cycling in Amazon floodplain lakes. We collected sediments, suspended particulate material (SPM), and plankton from floodplain lakes and compared then to sediments from rivers and soils of the central Amazon basin by measuring concentrations of total Hg (THg) and methylmercury (MMHg), and mercury isotope ratios. Concent...
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