Figure 1

Map and an aerial photo of the study site. 1, 2 and 3 in the aerial photo represent the positions of the grassland, cropland, and Tamarix, respectively. The map was created using ArcGIS (v10.3.1) (ESRI Inc.) and Google Earth.

Map and an aerial photo of the study site. 1, 2 and 3 in the aerial photo represent the positions of the grassland, cropland, and Tamarix, respectively. The map was created using ArcGIS (v10.3.1) (ESRI Inc.) and Google Earth.