FIG 2.

Comparison of the distribution of epimural bacteria with significant effects at the phylum level for dairy cows (n = 8) fed a control diet (CON) or 60%, 75%, or 100% high-quality hay (60HQH, 75HQH, or 100HQH, respectively) diets based on 16S rRNA sequences compared to the SILVA version 123 database. Error bars indicate the standard error of the mean. Different lowercase letters above the bars indicate significant differences (P < 0.05). Increases in the Proteobacteria population in the HQH diets correspond largely with decreases in the Firmicutes population.