1. Research Center of Forest Management Engineering of State Forestry and Grassland AdministrationBeijing Forestry University Beijing China
2. Forest Sciences Centre of Catalonia (CTFC) Solsona Spain
3. Center for Ecological Research and Forestry Applications (CREAF) Cerdanyola del Vallès Spain
4. Département de Sciences BiologiquesUniversité de Montréal Montréal Quebec Canada