Louis Fortier

Centre National de la Recherche Scientifique

Papers

Total Citations

H-Index

About

Louis Fortier is a pioneering Arctic marine ecologist whose research has fundamentally reshaped our understanding of biological productivity in polar oceans. His work centers on the impacts of climate change on Arctic marine ecosystems, with particular focus on sea ice dynamics, phytoplankton blooms, and the trophic linkages that sustain fish and marine mammals. Fortier’s most cited study, “Arctic mid-winter phytoplankton growth revealed by autonomous profilers” (2020, 68 citations), overturned the long-held paradigm that phytoplankton cannot grow under sea ice during the polar night. By deploying autonomous underwater profilers, he provided direct observational evidence of significant phytoplankton growth beneath ice cover in mid-winter, challenging assumptions about the timing and drivers of Arctic primary production. This breakthrough has profound implications for modeling carbon cycling and food web dynamics in a rapidly warming Arctic. Fortier is also renowned for leading the Canadian Arctic GEOTRACES program and for his decades-long leadership of the ArcticNet Network of Centres of Excellence, which has advanced interdisciplinary research on climate change impacts in the North. His work has earned him the Order of Canada and the prestigious Prix Marie-Victorin, cementing his legacy as a transformative figure in polar oceanography.