Dr. John Chételat

Research Scientist - Ecotoxicology of Metals

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

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

Key publications

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.

Research facility

Carleton University, 1125 Colonel By Drive
Ottawa, ON K1A 0H3


Adjunct Research Professor, Department of Geography and Environmental Studies, Carleton University