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Joshua Thienpont

Joshua Thienpont

Assistant Professor

Environmental Science Program Coordinator

Credentials

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.

Contact Information

4700 Keele Street
Toronto, ON M3J 1P3, HNES 241

jthienpo@yorku.ca

Limnology and Paleoenvironmental Research Group | Google Scholar | Core Ideas

Research Interests

My research interests focus on landscape and environmental changes and how they impact aquatic 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 a combination of contemporary aquatic sampling and monitoring along with lake sediment records (the science of paleolimnology) to reconstruct past environments where direct monitoring data are sparse or absent. My current research includes work in the Northwest Territories examining the role of permafrost environments and their change on downstream lakes, in northern Ontario studying the cumulative effects of disturbances on Lake Nipigon, and in nearshore areas of the Laurentian Great Lakes, including near the Bruce Power generating station on Lake Huron.

Research Output

Thienpont JR, Korosi JB, Blais JM, Smol JP. 2025. New developments in paleo-ecotoxicology: Emerging approaches in applying lake sediment archives to assess impacts from aquatic pollution. Current Opinion in Environmental Science & Health. https://doi.org/10.1016/j.coesh.2025.100667

Coleman KA, Palmer MJ, Quinton WL, Thienpont JR, Korosi JB. 2025. Spatiotemporal variability in chromophoric dissolved organic carbon in small, shallow lakes from discontinuous permafrost peatlands (Taiga Plains, Northwest Territories, Canada). Canadian Journal of Fisheries and Aquatic Sciences, 82: 1-12, http://dx.doi.org/10.1139/cjfas-2024-0339.

Thienpont JR, O’Hagan C, Hoskin G, Kokelj SV, Smol JP, Pisaric MLJ, Korosi JB. 2025. A framework for understanding the impacts of thaw-driven disturbance regimes on northern lakes. Permafrost and Periglacial Processes, 36: 137-150, http://doi.org/10.1002/ppp.2256.

Hoskin GN, Thienpont JR, Do P, Coleman KA, Korosi JB. 2024. Influence of barrier beach dynamics on ecological indicator taxa in north-central Lake Ontario coastal wetlands. Journal of Great Lakes Research, https://doi.org/10.1016/j.jglr.2024.102437.

Korosi JB, Adano RC, Do P, Hall RI, Jeyerajah J, Stewart EM, Wiklund JA, Thienpont JR. 2024. Ecosystem impacts of an invasive charophyte (Nitellopsis obtusa) interpreted in a multiple stressor context using paleolimnology. Lake and Reservoir Management, 40:132–144, https://doi.org/10.1080/10402381.2024.2330071.

Auger B, Nevalainen L, Blais JM, Thienpont JR, Korosi JB. 2023. A comparative paleolimnological analysis of Chydorus exposure to ultraviolet radiation associated with shoreline retrogressive thaw slumping in lakes of the Mackenzie Delta uplands (Northwest Territories, Canada). Journal of Paleolimnology. 70(3): 193-204, https://doi.org/10.1007/s10933-023-00290-z.

Coleman KA, Hoskin GN, Chasmer L, Thienpont JR, Quinton WL, Korosi JB. 2023. Limnology and diatom ecology of shallow lakes in a rapidly thawing discontinuous permafrost peatland. Inland Waters, 13(1): 13-29, https://doi.org/10.1080/20442041.2022.2144699.

Recognition & Awards

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

Courses

Course CodeTitle
GEOG 1401Physical Geography: Weather and Climate
GEOG 3900Physical Geography of the City
GEOG 3500Biogeography