1. Long-term Research Station of Alpine Forest Ecosystems; Provincial Key Laboratory of Ecological Forestry Engineering; Institute of Ecology and Forestry; Sichuan Agricultural University; 211 Huimin Road, Wenjiang District Chengdu 611130 Sichuan China
2. Department of Biological Science, Institute of Environment Sciences; University of Quebec at Montreal; Case Postale 8888, succursale Centre-Ville Montreal QC H3C 3P8 Canada
3. Sustainable Agri-Food Sciences Division; Agri-Food & Biosciences Institute (AFBI); Newforge Lane Belfast BT9 5PX UK
4. Department of Geosciences and Natural Resource Management; University of Copenhagen; Rolighedsvej 23 DK-1958 Frederiksberg C Denmark
5. Laboratory for Ecological Forecasting and Global Change; College of Forestry; Northwest A & F University; No. 3 Taicheng Road Yangling 712100 China