FIG 3.

Identification of the core microbiota in the in situ system. (A) Correlation network between microbial genera and flavor compounds during the fermentation process in the in situ system. Inner circle nodes represent microbes (light-red nodes represent bacteria genera, and light-blue nodes represent the fungi genera), and outer circle nodes represent flavor compounds (different colors represent different flavor types). The thickness of the lines is proportional to the value of Spearman’s correlation (ρ > 0.5, P < 0.05). The colors of the lines are the same as the flavor nodes. (B) Correlation network of cooccurring genera in dominant microbiota. Statistical significance (P < 0.05) and Spearman correlation coefficient (|ρ| > 0.5) indicate the correlations. Light-red nodes represent bacterial genera, and light-blue nodes represent fungal genera. Green and red lines indicate negative and positive interactions, respectively, between genera. The thickness of the lines represents the strength of interaction. (C) Venn diagram of the core microbiota. Different circles represent different genus categories. (D) RDA of fermentation process. Blue dots represent the times of fermentation. Red dots represent the core microbiota. Black arrows point to the different environmental factors. Percentages on the axes represent the eigenvalues of principal components.