Fig. 5. Fungal community structure assessed by β-diversity patterns using the principal coordinate analysis plots of Bray-Curtis distances. Different shape represents exclusion or grazing soils and color represents grassland types. E,exclusion; G,grazing; TD, temperate desert; TS, temperate steppe; MM, mountain meadow. ANOSIM similarity analysis was used to test the signficance between groups.
3.4. Correlation of grazing exclusion and grassland type with plant、soil and fungal diversity
The correlations between grazing exclusion and grassland type with plant、soil and fungal diversity are shown in Figure 6. Fraction was only significantly negatively correlated with vegetation coverage, and all indicators were highly significantly correlated with grassland type, except for the vegetation Pielou index and the microbial Shannon and Chao1 indices. In addition, the microbial Simpson index showed a highly significant negative correlation with SOC, and a significant negative correlation with TN, TP, C:P and N:P.