de LAFONTAINE Guillaume

Guillaume de Lafontaine is a professor at Université du Québec à Rimouski where he is the chairholder of the Canada Research Chair in Integrative Biology of the Northern Flora. His research focuses on plant eco-evolutionary dynamics.

Guillaume addresses ecological, biogeographical, and evolutionary responses of the boreal and cold-temperate flora to environmental shifts associated with historical (Quaternary) and ongoing (anthropogenic) global change. He relies on an integrative approach, combining field ecology, paleoecology, population genetics/genomics, macroecology, to produce joint inferences across hierarchical levels of biodiversity, from genes to biomes, in a biogeographical context.

Keys publications



Journal of Ecology

Pelletier E, Couture M, de Lafontaine G. 2023. Hedging at the rear edge: Intraspecific trait variability drives the trajectory of marginal populations in a widespread boreal tree species. Journal of Ecology, 111, 479-494.


Trends in Ecology & Evolution

Napier JD, de Lafontaine G, Chipman ML. 2020. The evolution of paleoecology. Trends in Ecology & Evolution, 35, 293–295.



de Lafontaine G, Napier JD, Petit RJ, Hu FS. 2018. Invoking adaptation to decipher the genetic legacy of past climate change. Ecology, 99, 1530–1546.


Quaternary Science Reviews

Sitzia L, Bertran P, Bahain J-J, Bateman MD, Hernandez M, Garon H, de Lafontaine G, Mercier N, Leroyer C, Queffelec A, Voinchet P. 2015. The quaternary coversands of southwest France. Quaternary Science Reviews, 124, 84–105.


New Phytologist

de Lafontaine G, Amasifuen Guerra CA, Ducousso A, Petit RJ. 2014. Cryptic no more: soil macrofossils uncover Pleistocene forest microrefugia within a periglacial desert. New Phytologist, 204, 715–729.


Molecular Ecology

de Lafontaine G, Ducousso A, Lefèvre S, Magnanou E, Petit RJ. 2013. Stronger spatial genetic structure in recolonized areas than in refugia in the European beech. Molecular Ecology, 22, 4397–4412.

Guillaume de Lafontaine