Karelle est diplômé de la maîtrise en biologie à l'Université du Québec à Montréal sous la direction de Alain Leduc et la co-direction de Yves Bergeron.
Rik Van Bogaert, Karelle Jayen, Sylvie Gauthier, Yves Bergeron, David M. Green, Igor Drobyshev. (2015). Prolonged Absence of Disturbance Associated with Increased Environmental Stress May Lead to Reduced Seedbank Size in Picea mariana in Boreal Eastern North America. Ecosystems. 18(7):1135-1150. 10.1007/s10021-015-9888-3 lien
Virginie-Arielle Angers, Sylvie Gauthier, Karelle Jayen, Yves Bergeron, Pierre Drapeau. (2011). Tree mortality and snag dynamics in North American boreal tree species after a wildfire: a long-term study. International Journal of Wildland Fire. 20(6):751-763. 10.1071/WF10010 lien
Karelle Jayen, Yves Bergeron, Alain Leduc. (2006). Effect of fire severity on regeneration success in the boreal forest of north-west Quebec, Canada. Ecoscience. 13(2):143-151..