Dr. John Chételat
Current research and/or projects
Contributing to Environment Canada’s mandate to ensure wildlife is conserved and protected
- Bioaccumulation of metals in wildlife
- Transfer of metals in food webs
- Identification of sensitive ecosystems to metal pollution
- Metal pollution in Arctic ecosystems
Professional activities / interests
- Contributor to scientific assessment reports on mercury pollution including the AMAP Assessment 2011: Mercury in the Arctic and the Canadian Arctic Contaminants Assessment Report III 2012: Mercury in Canada's North
- Supervisor of undergraduate and graduate student research
- Collaborator in northern community-based monitoring of metals in the environment
Education and awards
Ph.D., Biological Sciences, Université de Montréal, 2009
M.Sc., Biology, University of Ottawa, 1999
B.Sc. (Hons.), Biology, University of Ottawa, 1996
Chételat, J., A. Poulain, M. Amyot, L. Cloutier, H. Hintelmann. Ecological determinants of methylmercury bioaccumulation in benthic invertebrates of polar desert lakes. Polar Biology 37:1785-1796.
Chételat, J., M. Amyot, P. Arp, J.M. Blais, D. Depew et al. Mercury in freshwater ecosystems of the Canadian Arctic: Recent advances on its cycling and fate. Science of the Total Environment (in press).
Clayden, M.G., K.A. Kidd, J. Chételat, B.D. Hall, E. Garcia. 2014. Environmental, geographic and trophic influences on methylmercury concentrations in macroinvertebrates from lakes and wetlands across Canada. Ecotoxicology 23: 273–284.
Perron, T., J. Chételat, J. Gunn, B. Beisner, M. Amyot. 2014. Effects of experimental thermocline and oxycline deepening on methylmercury bioaccumulation in a Canadian Shield lake. Environmental Science & Technology 48: 2626–2634.
St. Pierre, K.A., J. Chételat, E. Yumvihoze, A.J. Poulain. 2014. Temperature and the sulphur cycle control of methylmercury cycling in high Arctic coastal marine sediments from Allen Bay, Nunavut, Canada. Environmental Science & Technology 48: 2680–2687.
Chételat, J., L. Cloutier, M. Amyot. 2013. Offshore feeding in benthic fish can increase methylmercury bioaccumulation. Ecotoxicology 22: 1020–1032.
Douglas, T.A., L. Loseto, R. Macdonald, P. Outridge, S. Wilson, A. Dommergue, A. Poulain, M. Amyot, T. Barkay, T. Berg, J. Chételat, et al. 2012. Fate of mercury deposited to Arctic marine and terrestrial ecosystems. Environmental Chemistry 9: 321–355.
Chételat, J., M. Amyot, L. Cloutier. 2012. Shifts in elemental composition, methylmercury content and d15N ratio during growth of a High Arctic copepod. Freshwater Biology 57: 1228–1240.
Stern, G., R.W. Macdonald, P.M. Outridge, S. Wilson, J. Chételat, A. Cole, H. Hintelmann, L.L. Loseto, A. Steffen, F. Wang, C. Zdanowicz. 2011. How does climate change influence Arctic mercury? Science of the Total Environment 414: 22–42.
Chételat, J., M. Amyot, E. Garcia. 2011. Habitat-specific bioaccumulation of methylmercury in invertebrates of small mid-latitude lakes in North America. Environmental Pollution 159: 10–17.
Chételat, J., L. Cloutier, M. Amyot. 2010. Carbon sources for lake food webs in the Canadian Arctic Archipelago and other regions in Arctic North America. Polar Biology 33: 1111–1123.
Chételat, J., M. Amyot. 2009. Elevated methylmercury in High Arctic Daphnia and the role of productivity in controlling their distribution. Global Change Biology 15: 706–718.
Chételat, J., M. Amyot, L. Cloutier, A. Poulain. 2008. Metamorphosis in chironomids, more than mercury supply, controls methylmercury transfer to fish in High Arctic lakes. Environmental Science and Technology 42: 9110–9115.
Adjunct Research Professor, Department of Geography and Environmental Studies, Carleton University