1. CAS Key Laboratory of Forest Ecology and Management; Institute of Applied Ecology; The Chinese Academy of Sciences; Shenyang Liaoning China
2. Harvard Forest; Harvard University; Petersham MA USA
3. Institute for Applied Ecosystem Studies; Northern Research Station; USDA Forest Service; Rhinelander WI USA
4. Ecoinformatics and Biodiversity Section; Department of Biosciences; Aarhus University; Aarhus C Denmark