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Joshua Thienpont

Joshua Thienpont

Assistant Professor


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

Research Keywords

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

Graduate Supervision

I supervise students in the graduate programs in Geography.

Joshua Thienpont

Contact Information

4700 Keele Street
Toronto, ON M3J 1P3, Ross Building S406

416 736 2100 ext 22002

Limnology and Paleoenvironmental Research Group | Google Scholar | Core Ideas

Research Interests

My research interests focus on 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, in the context of climate warming. I use lake sediment records (the science of paleolimnology) to reconstruct past environments where direct monitoring data are sparse or absent, to understand past ecosystem changes. My current research is examining the impacts of the thaw of ice-rich permafrost and subsequent geomorphic disturbances such as thaw slumping and cryogenic landslides on aquatic ecosystem functioning, focused on the Mackenzie Delta region in northwestern Canada.

Research Output

Sivarajah B, Korosi JB, Thienpont JR, Kimpe LE, Blais JM, Smol JP. 2022. Biological responses to metal(loid) pollution, urbanization, and climatic changes in sub-Arctic lakes around Yellowknife, Canada. Arctic Science.  

Gruia S-A, Thienpont JR, Coleman KA, Korosi JB. 2022. Climatic drivers of limnological change in Iqallukvik Lake, Tuktoyaktuk, Northwest Territories, Canada. Arctic Science.  

Korosi JB, Coleman KA, Hoskin G, Little AJ, Stewart E, Thienpont JR. 2022. Paleolimnological perspectives on the shifting geographic template of permafrost landscapes and its implications for Arctic freshwater biodiversity. Canadian Journal of Fisheries and Aquatic Sciences, DOI: 10.1139/cjfas-2021-0280.

Thienpont JR, Yang Z, Hall RI, Wolfe BB, Hollebone BP, Blais JM. 2021. Tracking petrogenic hydrocarbons in lakes of the Peace-Athabasca Delta, AB, Canada using petroleum biomarkers. Environmental Pollution, DOI: 10.1016/j.envpol.2021.117286.

Labaj A Jeziorski A, Kurek J, Bennet JR, Cumming BF, DeSellas AM, Korosi JB, Paterson AM, Sweetman AN, Thienpont JR, Smol JP. 2021. Environmental drivers of cladoceran assemblages at a continental scale: a synthesis of Alaskan and Canadian datasets. Freshwater Biology, doi: 10.1111/fwb.13689.

Thienpont JR, Eickmeyer DC, Kimpe LE, Blais JM. 2020. Thermokarst disturbance drives concentration and composition of metals and polycyclic aromatic compounds in lakes of the western Canadian Arctic. Journal of Geophysical Research: Biogeosciences, 125, e2020JG005834. doi:10.1029/2020JG005834.

Cheney CL, Eccles KM, Kimpe LE, Thienpont JR, Korosi JB, Blais JM. 2020. Determining the effects of past gold mining using a sediment palaeotoxicity model. Science of the Total Environment 718: 137308.

Korosi JB, Thienpont JR, Eickmeyer DC, Kipme L, Blais JM. 2020. A paleolimnological approach for interpreting Aquatic Effects Monitoring at the Diavik Diamond Mine (Lac de Gras, Northwest Territories, Canada). Lake and Reservoir Management 36(3): 297-313.

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.

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.

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.

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.

Thienpont JR, Rühland, KM, Pisaric MFJ, Kokelj SV, Kimpe LE, Blais JM, Smol JP. 2013. Biological responses to permafrost thaw slumping in Canadian Arctic lakes. Freshwater Biology 58: 337–353.

Pisaric MFJ, Thienpont JR, Kokelj SV, Nesbitt H, Lantz TC, Solomon S, Smol JP. 2011. Impacts of a recent storm surge on an Arctic delta ecosystem examined in the context of the last millennium. Proceedings of the National Academy of Sciences (USA) 108: 8960-8965.  

Recognition & Awards

  • Teaching Award, Department of Geography
  • W. Garfield Weston Postdoctoral Fellowship for Northern Research
  • Fellow of the Royal Canadian Geographical Society


Course CodeTitle
GEOG1401Physical Geography: Weather and Climate
GEOG3340Fundamentals of Geographic Information Systems