Figure 8 . Effects of new afforestation under monoculture and intercropping with G. jasminoides (a) and low-yield forests under monoculture and intercropping with G. jasminoides (b) on bacterial functional communities, as determined using structural equation models. Solid lines indicate that the effects were at a positive level, dashed lines indicate that the effects were at a negative level. The red shades represent positive regulations, and the blue shades represent negative regulations. Darker shades of red represent high regulation strength, and light shades represent low regulation strength. Asterisks indicate the significance level: *P < 0.05, **P < 0.01, ***P< 0.001.)