A detailed description of each data file is given below. #################################### 1_Tree mycorrhizal type and functional traits.csv The dataset including the list of variables： Family: species belong to its family Genus: species belong to its genus Species: the species occured in the study plots Mycorrhiza Type： arbuscular mycorrhiza （AM）; ectomycorrhiza (EcM); ericoid mycorrhiza (ErM) Maximum height: Hmax（m） Leaf thickness: LT (cm) Leaf area: LA (cm2) Specific leaf area: SLA (cm2/g) Leaf carbon concentration: LCC (g/kg) Leaf nitrogen concentration: LNC (g/kg) Leaf phosphorus concentration: LPC (g/kg) Wood density: WD (g/cm3) Seed mass: SM (g) #################################### 2_All tree data.csv This dataset including all diversity data which used in the analysis for all trees and mycorrhizal fungi. The dataset including the list of variables： plotID: the name of plot Elevation (m): the elevation of each plot Aspect: the plot belong to the eastern slope (east) or western slope (west) Total above-ground carbon (Mg.ha-1): the total above-ground carbon of each plot Soil organic carbon (g/kg) tree species richness tree abundance Mycorrhizal fungi species richness CWM_LCC (g/kg) : community-weighted mean of leaf carbon concentration CWM_LNC (g/kg) : community-weighted mean of leaf nitrogen concentration CWM_LPC (g/kg) : community-weighted mean of leaf phosphorus concentration CWM_LT (cm) : community-weighted mean of leaf thickness CWM_LA (cm2): community-weighted mean of leaf area CWM_SLA (cm2/g): community-weighted mean of specific leaf area CWM_WD (g/cm3): community-weighted mean of wood density CWM_SM (g): community-weighted mean of seed mass CWM_Hmax (m): community-weighted mean of maximum height Fdis_all traits: functional dispersion of multiple functional traits FDis_LCC: functional dispersion of leaf carbon concentration FDis_LNC: functional dispersion of leaf nitrogen concentration FDis_LPC: functional dispersion of leaf phosphorus concentration FDis_LT: functional dispersion of leaf thickness FDis_LA: functional dispersion of leaf area FDis_SLA: functional dispersion of specific leaf area FDis_WD: functional dispersion of wood density FDis_SM: functional dispersion of seed mass FDis_Hmax: functional dispersion of maximum height #################################### 3_AM tree data.csv This dataset including all diversity data which used in the analysis for AM trees and AM fungi. The dataset including the list of variables： plotID: the name of plot Elevation (m): the elevation of each plot Aspect: the plot belong to the eastern slope (east) or western slope (west) AM above-ground carbon (Mg.ha-1): the above-ground carbon of AM trees AM tree species richness AM tree abundance AM fungi species richness CWM_LCC (g/kg): community-weighted mean of AM tree leaf carbon concentration CWM_LNC (g/kg):community-weighted mean of AM tree leaf nitrogen concentration CWM_LPC (g/kg):community-weighted mean of AM tree leaf phosphorus concentration CWM_LT (cm): community-weighted mean of AM tree leaf thickness CWM_LA (cm2): community-weighted mean of AM tree leaf area CWM_SLA (cm2/g): community-weighted mean of AM tree specific leaf area CWM_WD (g/cm3): community-weighted mean of AM tree wood density CWM_SM (g): community-weighted mean of AM tree seed mass CWM_Hmax (m): community-weighted mean of AM tree maximum height Fdis_all traits: functional dispersion of AM tree multiple functional traits FDis_LCC: functional dispersion of AM tree leaf carbon concentration FDis_LNC: functional dispersion of AM tree leaf nitrogen concentration FDis_LPC: functional dispersion of AM tree leaf phosphorus concentration FDis_LT: functional dispersion of AM tree leaf thickness FDis_LA: functional dispersion of AM tree leaf area FDis_SLA: functional dispersion of AM tree specific leaf area FDis_WD: functional dispersion of AM tree wood density FDis_SM: functional dispersion of AM tree seed mass FDis_Hmax: functional dispersion of AM tree maximum height #################################### 4_EcM tree data.csv This dataset including all diversity data which used in the analysis for EcM trees and EcM fungi. The dataset including the list of variables： plotID: the name of plot Elevation (m): the elevation of each plot Aspect: the plot belong to the eastern slope (east) or western slope (west) EcM above-ground carbon (Mg.ha-1): the above-ground carbon of EcM trees EcM tree species richness EcM tree abundance EcM fungi species richness CWM_LCC (g/kg): community-weighted mean of EcM tree leaf carbon concentration CWM_LNC (g/kg): community-weighted mean of EcM tree leaf nitrogen concentration CWM_LPC (g/kg): community-weighted mean of EcM tree leaf phosphorus concentration CWM_LT (cm): community-weighted mean of EcM tree leaf thickness CWM_LA (cm2): community-weighted mean of EcM tree leaf area CWM_SLA (cm2/g): community-weighted mean of EcM tree specific leaf area CWM_WD (g/cm3): community-weighted mean of EcM tree wood density CWM_SM (g): community-weighted mean of EcM tree seed mass CWM_Hmax (m): community-weighted mean of EcM tree maximum height Fdis_all traits: functional dispersion of EcM tree multiple functional traits FDis_LCC: functional dispersion of EcM tree leaf carbon concentration FDis_LNC: functional dispersion of EcM tree leaf nitrogen concentration FDis_LPC: functional dispersion of EcM tree leaf phosphorus concentration FDis_LT: functional dispersion of EcM tree leaf thickness FDis_LA: functional dispersion of EcM tree leaf area FDis_SLA: functional dispersion of EcM tree specific leaf area FDis_WD: functional dispersion of EcM tree wood density FDis_SM: functional dispersion of EcM tree seed mass FDis_Hmax: functional dispersion of EcM tree maximum height #################################### 5_ErM tree data.csv This dataset including all diversity data which used in the analysis for ErM trees and ErM fungi. The dataset including the list of variables： plotID: the name of plot Elevation (m): the elevation of each plot Aspect: the plot belong to the eastern slope (east) or western slope (west) ErM above-ground carbon (Mg.ha-1): the above-ground carbon of ErM trees ErM tree species richness ErM tree abundance ErM fungi species richness CWM_LCC (g/kg): community-weighted mean of ErM tree leaf carbon concentration CWM_LNC (g/kg): community-weighted mean of ErM tree leaf nitrogen concentration CWM_LPC (g/kg): community-weighted mean of ErM tree leaf phosphorus concentration CWM_LT (cm): community-weighted mean of ErM tree leaf thickness CWM_LA (cm2): community-weighted mean of ErM tree leaf area CWM_SLA (cm2/g): community-weighted mean of ErM tree specific leaf area CWM_WD (g/cm3): community-weighted mean of ErM tree wood density CWM_SM (g): community-weighted mean of ErM tree seed mass CWM_Hmax (m): community-weighted mean of ErM tree maximum height Fdis_all traits: functional dispersion of ErM tree multiple functional traits FDis_LCC: functional dispersion of ErM tree leaf carbon concentration FDis_LNC: functional dispersion of ErM tree leaf nitrogen concentration FDis_LPC: functional dispersion of ErM tree leaf phosphorus concentration FDis_LT: functional dispersion of ErM tree leaf thickness FDis_LA: functional dispersion of ErM tree leaf area FDis_SLA: functional dispersion of ErM tree specific leaf area FDis_WD: functional dispersion of ErM tree wood density FDis_SM: functional dispersion of ErM tree seed mass FDis_Hmax: functional dispersion of ErM tree maximum height #################################### 6_abiotic variables.csv This dataset including the environmental variables used in this study. The dataset including the list of variables： plotID: the name of plot Elevation (m): the elevation of each plot Aspect: the plot belongs to the eastern slope (east) or western slope (west) pH: soil pH total nitrogen (g/kg): soil total nitrogen concentration total phosphorus (g/kg): soil total nitrogen concentration total potassium(g/kg): soil total potassium concentration alkali-hydrolysable nitrogen(mg/kg): soil alkali-hydrolysable nitrogen concentration available phosphorus(mg/kg): soil available phosphorus concentration available potassium (mg/kg): soil available potassium concentration dry season soil water content (%): soil water content at dry season mean annual air temperature (°C): mean annual temperature of air (1.3 m height) mean annual soil temperature (°C): mean annual temperature of soil (15 cm soil depth) ####################################