1. Great Lakes Forestry Centre, Canadian Forest Service, Natural Resources Canada, 1219 Queen St. E., Sault Ste. Marie, ON P6A 2E5, Canada
2. Independent Researcher, Fredericton, NB E3B 6Y2, Canada
3. GWA Forestry and Applied Biosciences Consulting, 5 Rockridge Dr., Sussex Corner, Sussex, NB E4E 5R2, Canada