Fig. 3: Composition and differences of bacterial communities among different samples.

a–c Relative abundance of community composition at different taxonomic levels. a phylum level, b order level, c genus level; d ANOVA analysis at the phylum level (p < 0.05); e specificity-occupancy analysis at the genus level (specialized genera are marked in blue, while genera related to nitrogen and carbon fixation within the specialized genera are marked in other colors, information on these genera is detailed in Fig. S5).