Table 1.

The spatial predictors adopted in this study.

Factor	Variables	Data Source
Environmental	Elevation	Shuttle Radar Topography Mission (SRTM)
	Change of forest	MODIS Land Cover Product (MCD12C1)
	Change of grassland
Meteorological	Mean temperature	China Meteorological Data Service Centre (CMDC)
	Relative humidity
	Precipitation
Socioeconomic	Population density	Socioeconomic Data and Applications Centre (SEDAC)
	GDP	Global Change Research Data Publishing and Repository
	Urban accessibility	European Commission Joint Research Centre (ECJRC)