highly significantp < 0.05
Correlation analysis among the key microorganisms revealed a highly significant positive correlation between Lactococcus and Allisonella (correlation coefficient = 0.75, p < 0.05) and a significant positive correlation between unclassified Ktedonobacteria and Lactococcus (correlation coefficient = 0.57, p < 0.05) ( Supplementary Table S3 and Figures 23–27 ).