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Joshua Thienpont

Joshua Thienpont

Sessional Assistant Professor


PhD Biology, Queen's University
BScH Biology, Queen's University

Research Keywords

Quaternary Environments; Landscape Disturbance; Permafrost Thaw; Aquatic Ecosystems; Arctic Coasts.

Joshua Thienpont

Contact Information

4700 Keele Street
Toronto, ON M3J 1P3

416 736 2100

Research Interests

My interests focus on teaching and research around landscape disturbances and how they impact ecosystem processes. I’m particularly interested in the connection between physical disturbances and ecosystem changes, including the biogeography of organisms. My current research is examining how marine storm surges in the Mackenzie Delta of the western Canadian Arctic result in widespread salinization, fundamentally altering terrestrial and aquatic ecosystems. I use lake sediment records to reconstruct past environments where direct monitoring data are sparse or absent, in order to understand past ecosystem changes. In my teaching I stress the interconnectedness of environmental processes and impacts. I am particularly interested in the use of technology in a teaching framework. I have worked over the past year to integrate the use of the hydraulic flume in geomorphology teaching in several of my courses on the topic.

Research Output

Cheney CL, Eccles KM, Kimpe LE, Thienpont JR, Korosi JB, Blais JM. In press. Predicting the toxicity of historic gold mining using lake sediment cores as historical archives. Science of the Total Environment.

Korosi JB, Thienpont JR, Eickmeyer DC, Kipme L, Blais JM. In press. A paleolimnological approach for interpreting Aquatic Effects Monitoring at the Diavik Diamond Mine (Lac de Gras, Northwest Territories, Canada). Lake and Reservoir Management.

Coleman KA, Palmer MJ, Korosi JB, Thienpont JR, Blais JM, Smol JP. 2019. Assessing long-term changes in aquatic ecosystems near a small conventional oil and gas operation in the Cameron Hills, southern Northwest Territories, Canada. Fundamental and Applied Limnology 192: 181–197.

Thienpont JR, Perreault JT, Pisaric MFJ, Korosi JB, Blais JM. 2019. Has natural lake expansion and landscape inundation resulted in mercury increases in flooded lakes of the Great Slave Lowlands (Northwest Territories, Canada)? Journal of Paleolimnology 61: 345-354.

Griffiths KT, Thienpont JR, Jeziorski J, Smol JP. 2018. The impact of Ca-rich diamond mining effluent on downstream cladoceran communities in softwater lakes of the Northwest Territories, Canada. Canadian Journal of Fisheries and Aquatic Sciences 75: 2221-2232.

Thienpont JR, Desjardins CM, Kimpe LE, Korosi JB, Kokelj SV, Palmer MJ, Muir DCG, Kirk JL, Smol JP, Blais JM. 2017. Comparative histories of polycyclic aromatic compound accumulation in lake sediments near petroleum operations in western Canada. Environmental Pollution 231: 13-21.

Korosi JB, Thienpont JR, Smol JP, Blais JM. 2017. Paleo-ecotoxicology: what can lake sediments tell us about ecosystem responses to environmental pollutants? Environmental Science & Technology 51: 9446–9457.

Korosi JB*, Thienpont JR*, Pisaric MFJ, deMontigny P, Perreault JT, McDonald J, Simpson MJ, Armstrong T, Kokelj SV, Smol JP, Blais JM. 2017. Broad-scale lake expansion and flooding inundates essential wood bison habitat. Nature Communications, doi: 10.1038/ncomms14510. *Authors contributed equally.

Bouchard F, MacDonald LA, Turner KW, Thienpont JR, Medeiros AS, Biskaborn BK, Korosi JB, Hall RI, Pienitz R, Wolfe BB. 2017. Paleolimnology of thermokarst lakes: a window into permafrost landscape evolution. Arctic Science 3: 91-117.

Thienpont JR, Korosi JB, Hargan KE, Williams T, Eickmeyer DC, Kimpe LE, Palmer MJ, Smol JP, Blais JM. 2016. Multi-trophic level response to extreme metal contamination from gold mining in a subarctic lake. Proceedings of the Royal Society B – Biological Sciences, 283: 20161125, doi: 10.1098/rspb.2016.1125.

Korosi JB, Eickmeyer DC, Thienpont JR, Palmer MJ, Kimpe LE, Blais JM. 2016. Assessing the contribution of combustion-derived contaminants to a remote subarctic environment from traffic on the Tibbitt to Contwoyto Winter Road (Northwest Territories, Canada). Science of the Total Environment 553: 96-106.

Eickmeyer DC, Kimpe LE, Kokelj SV, Pisaric MFJ, Smol JP, Sanei H, Thienpont JR, Blais JM. 2016. Interactions of polychlorinated biphenyls and organochlorine pesticides with sedimentary organic matter of retrogressive thaw slump-affected lakes of the Mackenzie River Delta uplands, NT, Canada. Journal of Geophysical Research – Biogeosciences 121: 411-421.

Stewart EM, Coleman KA, Korosi JB, Thienpont JR, Palmer MJ, Blais JM, Smol JP. 2016. Assessing environmental stressors on a commercial walleye fishery from a large northern ecosystem (Tathlina Lake) using water chemistry and paleolimnology. Journal of Great Lakes Research 42: 217-222.

Thienpont JR, Korosi JB, Cheng ES, Deasley K, Pisaric MFJ, Smol JP. 2015. Recent climate warming favours more specialized cladoceran taxa in western Canadian Arctic lakes. Journal of Biogeography 42: 1553-1565.

Coleman KA, Palmer M, Korosi JB, Kokelj SV, Jackson K, Hargan K, Courtney Mustaphi C, Thienpont JR, Kimpe LE, Blais JM, Pisaric MFJ, Smol JP. 2015. Tracking the impacts of recent warming and peat subsidence on aquatic ecosystems: a multi-proxy approach using remote sensing and lake sediments. Boreal Environment Research 20: 363-377.

Thienpont JR, Steele C, Vermaire JC, Pisaric MFJ, Kokelj SV, Smol JP. 2015. Synchronous changes in chironomid assemblages in two Arctic delta lake ecosystems after a major saltwater intrusion event. Journal of Paleolimnology 53: 177-189.

Recognition & Awards

  • Teaching Award, Department of Geography
  • W. Garfield Weston Postdoctoral Fellowship for Northern Research


Course CodeTitle
GEOG1400Physical Geography
GEOG2600Geomorphology I
ENVS3520Geographic Information Systems in Environmental Studies
GEOG3440Geoinformatics: Remote Sensing I
GEOG4600Rivers: Environment and Process