1. CAS Key Laboratory of Aquatic Botany and Watershed Ecology, Wuhan Botanical Garden Chinese Academy of Sciences Wuhan China
2. Center of Plant Ecology, Core Botanical Gardens Chinese Academy of Sciences Wuhan China
3. State Key Laboratory of Earth Surface Processes and Resource Ecology Beijing Normal University Beijing China
4. Department of Wildland Resources Utah State University Logan Utah USA
5. Department of Environmental Sciences University of Virginia Charlottesville Virginia USA
6. College of Resources and Environment Science Hebei Normal University Shijiazhuang China