Fig. 4

The differences in rectal microbiota diversity between HS and HSB groups (n = 9). A The Chao1 and Shannon indexes of rectum microbiota. B The principal component analysis (PCA) statistical significance was determined using analysis of similarities (Adonis) with 999 permutations at the genus level. C Relative abundances of rectal bacterial phylum in the HS and HSB group. D The Venn diagram indicates the numbers of rectal bacterial phylum level shared among the two groups. HS means fed starch-rich diet. HSB means fed a starch-rich diet supply of 4 g/d bile acids for dairy goats every day. The differences in data (A) were tested by the Wilcon rank-sum test. The bars represent mean ± SEM. ^*P < 0.05