1. Chemistry Department, Brock University. 1812 Sir Isaac Brock Way, St. Catherine's, ON, L2S 3A1, Canada
2. Department of Physical and Environmental Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, ON, M1C 1A4, Canada
3. Natural Resources Canada, Canadian Forest Service, Great Lakes Forestry Centre, 1219 Queen St. E., Sault Ste. Marie, ON, P6A 2E5, Canada
4. Centre for Northern Forest Ecosystem Resources, Ontario Ministry of Natural Resources and Forestry, 421 James St. S., Thunder Bay, ON, P7E 2V6, Canada