Long：Longitude	
Lat：Latitude	
Alt：Altitude	
MAP：Mean annual precipitation	
MAT:  Mean annual temprature
ET: Evapotranspiration	
aridity_index: Mean annual ET divided by MAP	
Plant_alpha_diversity: Shannon-Wiener diversity index
Plant_beta_diversity: Jaccard dissimilarity index
Bacterial_beta_diversity: Jaccard dissimilarity index	
Fungal_beta_diversity: Jaccard dissimilarity index	
Bacterial_alpha_diversity: Shannon-Wiener diversity index	
Fungal_alpha_diversity: Shannon-Wiener diversity index	
AN: soil available N	(mg/kg)
AP:  soil available P	(mg/kg)
SOM: soil organic matter (%)
BGBkg: Belowground biomass (kg/m2)	
AGBkg: Aboveground biomass (kg/m2)