Browsing Faculté des arts et des sciences – Département de sciences biologiques by Author "Chételat, John"
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Effects of experimental thermocline and oxycline deepening on methylmercury bioaccumulation in a Canadian Shield lake
Perron, Tania; Chételat, John; Gunn, John; Beisner, Beatrix; Amyot, Marc (American Chemical Society, 2014-02-10)Environmental disturbances like deforestation or climate change may influence lake thermal and oxic stratification, thereby modifying cycles of contaminants such as mercury (Hg). In a lake naturally separated into three basins, the thermocline and ... -
Environmental drivers of rare earth element bioaccumulation in freshwater zooplankton
MacMillan, Gwyneth A.; Clayden, Meredith G.; Chételat, John; Richardson, Murray C.; Ponton, Dominic; Perron, Tania; Amyot, Marc (American Chemical Society, 2018-12-26)Human activities have resulted in significant release of rare earth elements (REEs) into the environment. However, the pathways of REEs from waters and soils into freshwater food webs remain poorly understood. Recent studies suggest that aquatic ... -
High methylmercury in Arctic and subarctic ponds is related to nutrient levels in the warming eastern Canadian Arctic
MacMillan, Gwyneth A.; Girard, Catherine; Chételat, John; Laurion, Isabelle; Amyot, Marc (2015-06)Permafrost thaw ponds are ubiquitous in the eastern Canadian Arctic, yet little information exists on their potential as sources of methylmercury (MeHg) to freshwaters. They are microbially active and conducive to methylation of inorganic mercury, ...