1. State Key Laboratory of Vegetation
and Environmental Change, Institute of Botany, Chinese Academy of Science, Beijing 100093, China
2. Department of Biological Sciences,
Faculty of Science, National University of Singapore, 14 Science Drive 4, Singapore 117543
3. Smithsonian Tropical Research Institute, P.O. Box 0843-03092, Balboa, Ancón,
Republic of Panamá