1. Department of Geography, Faculty of Arts and Science, Queen’s University, Kingston, Ontario K7L 3N6, Canada
2. Canadian Forest Service (Pacific Forestry Centre), Natural Resources Canada, 506 West Burnside Road, Victoria, British Columbia V8Z 1M5, Canada
3. Department of Geography, University of Quebec at Montreal, C.P. 8888, succ. Centre-Ville, Montréal, Québec H3C 3P8, Canada
4. Airborne 1 Corporation, 5777 West Century Boulevard #725, Los Angeles CA 90045, USA