Fig. 4

Assembly process structuring the bacterial community. A Fit of the neutral community model (NCM) of community assembly. The solid grey lines represent the best fit to the neutral community model, and the dashed grey lines indicate 95% confidence intervals around the model prediction. ASVs that occur more or less frequently than predicted by neutral community model are shown by red and blue, respectively. R 2 represents the fit to the model. B Difference of βNTI between four treatment communities. C The niche breadth of the core and specific ASVs groups. D Difference of βNTI between the core and specific ASVs groups. E The relatively explained ecological process of the core and specific communities based on the values of two indices, βNTI and RCbray. Un: undominated processed; DiL: dispersal limitation; HoD: homogenizing dispersal; HeS: heterogene selection.