Changes in rumen microbial community abundances from amplicon sequence data in four diets, represented as average abundance per diet ± standard deviation (SD).

Diets are as follows: high (H) or low (L) proportion of concentrates without oil, or supplemented with SO (HSO and LSO, respectively). Only taxa significantly affected by diet are presented. The small letter at the beginning of each bacterial taxon name identifies the deepest classification level to which the OTUs were assigned. Diet effect represents significant (P < 0.05) microbial abundance changes due to FC, SO or FC × SO interaction.