Fig. 6

Changes in habitat quality: (a) habitat quality in 1980; (b) habitat quality in 2000; (c) habitat quality in 2020; (d) habitat quality in 2040 under the natural development scenario; (e) habitat quality in 2040 under the cultivated land protection scenario; (f) habitat quality in 2040 under the ecological protection scenario. The figure was generated using ArcGIS 10.6 (https://www.esri.com/zh-cn/arcgis/products/arcgis-desktop/overview).