1. State Key Laboratory of Earth Surface Processes and Resource Ecology and Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering; College of Life Sciences; Beijing Normal University; Beijing 100875 China
2. Beijing Key Laboratory of Cloud Computing Key Technology and Application; Beijing Computing Center; Beijing 100094 China
3. USDA Forest Service Hardwood Tree Improvement and Regeneration Center (HTIRC); Department of Forestry and Natural Resources; Purdue University; West Lafayette IN 47907 USA