1. Centre for Northern Agroforestry and Afforestation College of Agriculture and Bioresources; Univ. of Saskatchewan; Saskatoon SK S7N 5A1 Canada
2. College of Environmental Science and Forestry State Univ. of New York; Syracuse NY 13210
3. Centre d'étude de la forêt; Univ. du Québec; Montréal QC H3C 3P8 Canada
4. JM Sustainability Consulting; 201-3837 Luther Place Saskatoon SK S7H 4B1 Canada