A
principal coordinate analysis (PCoA) of soil fungal communities based on
Bray‒Curtis distances showed that PCoA1 and PCoA2 explained 27.0% and
13.1% of the variation in soil fungal communities in the 0-5 cm soil
layer, respectively, with a cumulative contribution of 40.1% (Fig. 5a).
ANOSIM analysis showed significant differences among soil fungal
communities regardless of grazing exclusion or grassland type and the
interaction of the two (P <0.001; P<0.007; P <0.002). In the 5-10 cm soil layer,
PCoA1 and PCoA2 explained 22.7% and 10.5% of the variation in soil
fungal communities respectively, with a cumulative contribution of
33.2% (Fig. 5b). ANOSIM analysis showed significant differences among
soil fungal communities regardless of grazing exclusion or grassland
type and the interaction of the two (P <0.001; P<0.009; P <0.003).
Fig. 4. Soil fungal α-diversity as affected by grazing
exclusion and grassland type. Error bars indicate standard errors (3
replicate sites). The lowercase letters indicate significant differences
among different grassland types (P < 0.05).TD,
temperate desert; TS, temperate steppe; MM, mountain meadow. Fig. a
represents the 0-5 cm soil fungal Shannon index; Fig. b represents the
0-5 cm soil fungal Simpson index; Fig. c represents the 0-5 cm soil
fungal Chao1 index; Fig. d represents the 5-10 cm soil fungal Shannon
index; Fig. e represents the 0-5 cm soil fungal Simpson index; Fig. f
represents the 0-5 cm soil fungal Chao1 index.