Figure 3

Location of the study area. The study area, located in the Jiulingtou Forest Farm (30°59′N, 110°47′E), is indicated by a triangle and Zigui City is marked in green. The blue line represents the Yangtze River flowing through the Three Gorges Reservoir area (the region surrounded by the red line). The maps were created using ArcGIS 10.2 software (ESRI 2014).