Figure 1

Map of location and sampling points of the study area. The graph was made by ArcGIS10.2, specific operation process can be further reference to http://www.esrichina.com.cn/sofewareproduct/ArcGIS/.

Map of location and sampling points of the study area. The graph was made by ArcGIS10.2, specific operation process can be further reference to http://www.esrichina.com.cn/sofewareproduct/ArcGIS/.