Fig. 3

Influence of SalA-H on the overall structural changes of intestinal microbiota in ZDF rats. A ACE index; B Chao1 index; C Shannon index; D cumulative species curve; the abscissa represents the sample size, the ordinate represents the number of OTU detected, and the blue shadow reflects the confidence interval of the curve; the results reflected the increase rate of new species observed when the sample size was continuously expanded in the process of overall sampling; E the two-dimensional ordination diagram of community composition structure of samples analyzed by PCA. Each point represents a sample, and points of different colors belong to different groups; the closer the distance between two points, the higher the similarity of microbial community structure between two samples, the smaller the difference; the percentages in brackets on the axes represent the proportion of variation in the raw data that can be explained by the corresponding principal component. F The three-dimensional ordination diagram of samples analyzed by PCA. Each point represents a sample, and points of different colors belong to different groups; the closer the distance between two points is, the higher the similarity of microbial community structure between two samples is, and the smaller the difference is. N = 10