Institution: | 1 Ministry of Education Key Laboratory of Silviculture and Conservation, Beijing Forestry University, Beijing 100083, China 2 Liaocheng Forestry Bureau, Liaocheng, Shandong 252002, China 3 Forestry Workstation of Daxing District in Beijing, Beijing 102600, China 4 Forestry Protection Station of Daxing District in Beijing, Beijing 102600, China |