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Spearman correlations between the taxon abundances of nine bacterial phyla and the concentration of six major EC microbial metabolites present in incubations with fecal slurries from 24 individuals at 2 h. The sign and strength of the Spearman correlation coefficients are represented as colors (blue: positive; red: negative). The significances of the correlations are indicated by asterisks: *P < 0.05, **P < 0.01.
