Photo of John Chételat

John Chételat

Adjunct Research Professor

Degrees:MSc (University of Ottawa), PhD (Université de Montréal)
Office:National Wildlife Research Centre (Environment Canada), on the Carleton University campus

Environment Canada Scientist Profile


Dr. John Chételat is a Research Scientist with Environment Canada at the National Wildlife Research Centre, located on the Carleton University campus. His research program focuses on the fate of metal pollution in the environment, using field-based approaches to identify ecosystem responses to these perturbations. He examines geographic gradients to test hypotheses of environmental controls on the movement of metals through aquatic ecosystems and their accumulation in food webs. Dr. Chételat received his Ph.D. in biology from the Université de Montréal and his B.Sc. and M.Sc. in biology from the University of Ottawa. He has studied environmental issues in the Canadian Arctic for over ten years and currently has projects investigating aquatic ecosystems in the Northwest Territories, Nunavut and Nunavik. He also conducts research locally in lakes of Gatineau Park, Quebec.

Research Interests:

  • Ecotoxicology of metals (mercury, lead) and other elements (arsenic)
  • Metal bioaccumulation in wildlife
  • Transfer of metals in food webs
  • Arctic limnology
  • Environmental applications of stable isotopes

Selected 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. PDF

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). PDF

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. PDF

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. PDF

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. PDF

Chételat, J., L. Cloutier, M. Amyot. 2013. Offshore feeding in benthic fish can increase methylmercury bioaccumulation. Ecotoxicology 22: 1020–1032. PDF

Douglas, T.A., L. Loseto, R. Macdonald, P. Outridge, S. Wilson, A. Dommergue‎, A. Poulain, M. Amyot, T. Barkay‎, T. Berg‎, J. Chételat‎, P. Constant‎, M. Evans‎, C. Ferrari‎, N. Gantner‎, M. Johnson, J. Kirk, N. Kroer, C. Larose, D. Lean, D. Muir, T.G. Nielsen, L. Poissant, S. Rognerud, H. Skov,  S. Sørensen, F. Wang, C.M. Zdanowicz. 2012. Fate of mercury deposited to Arctic marine and terrestrial ecosystems. Environmental Chemistry 9: 321–355. PDF

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. PDF

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. PDF

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. PDF

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. PDF

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. PDF

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. PDF