Figure 6: (a) The histogram of LDA value distribution shows that the LDA score is higher than the set value of the species (default setting is 4), that is, the biomarkers in the various groups have statistical differences. It shows that there are significant differences in abundance between groups, and the length of the histogram indicates the size of the impact of different species (LDA score). (b) In the cladistics, a circle radiating inward and outward indicates a taxonomic level from a phylum to a genus (or species). Each small circle at the different classification level represents the classification at that level, and the diameter of the circle is proportional to the relative abundance. Colouring principle: species with no significant difference are uniformly coloured yellow, and the difference species, Biomarker, is coloured according to the group, and the red nodes represent the microbial communities that play an important role in the red group. The green nodes represent microbiota that play an important role in the green group. The names of the species in English letters are shown in the legend on the right