Fig. 6

Circos diagram. In the Circos sample and species diagram, the large semicircle (right half circle) represents the distribution proportion of a species in different samples under a certain classification level (outer ribbon: species, inner ribbon color: different groups), and the length represents the specific distribution proportion; The small semicircle (left half circle) represents the composition of different species in a sample (outer band: grouping, inner band: species), and the relative abundance specific to length