1. Université du Québec à Rimouski, 300 allée des Ursulines, Rimouski, QC G5L 3A1, Canada;
2. Northern Hardwoods Research Institute Inc. 165 boulevard Hébert, Edmundston, NB E3V 2S8, Canada;
3. Centre for Forest Research, Université du Québec à Rimouski, 300 allée des Ursulines, Rimouski, Qc, Canada, G5L 3A1;
4. University of Maine – Fort Kent, 23 University Dr., Fort Kent, ME 04743, USA;
5. Department of Biology, Mount Allison University, Sackville, NB E4L 1G7, Canada