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Table 3 Relative abundances of rumen microbial domains and phyla affected by Saccharomyces cerevisiae fermentation products (SCFP) supplementation and a subacute ruminal acidosis (SARA) challenge as determined by shotgun metagenomic-based analysis

From: Saccharomyces cerevisiae fermentation products (SCFP) stabilize the ruminal microbiota of lactating dairy cows during periods of a depressed rumen pH

Item No SCFP SCFP SEM1   P-value
Control SARA Control SARA SARA SCFP SARA *SCFP
Archaea 0.71y 1.15x 1.80x 0.70y 0.14 0.07 0.07 < 0.01
 Euryarchaeota 0.95 1.02 1.69a 0.92b 0.19 0.02 0.02 < 0.01
Bacteria 98.36 97.52 97.05 97.36 0.7 0.72 0.34 0.42
 Actinobacteria 3.89 6.76 11.13 6.82 2.15 0.74 0.10 0.11
 Bacteroidetes 42.06 36.51 34.59 40.2 4.49 0.99 0.68 0.22
 Chlorobi 0 0.03 0 0 0 0.14 0.14 0.14
 Fibrobacteres 0.69a 0.19b 0.59a 0.35b 0.14 0.01 0.82 0.35
 Firmicutes 36.9y 46.49x 38.25y 42.01x 3.78 0.09 0.68 0.45
 Fusobacteria 0.02 0 0 0 0.01 0.33 0.33 0.33
 Nitrospirae 0.05 0.01 0.02 0 0.02 0.12 0.35 0.75
 Planctomycetes 0.14x 0.05y 0.2x 0.11y 0.04 0.06 0.18 1
 Proteobacteria 1.89 1.45 2 1.29 0.35 0.11 0.94 0.7
 Spirochaetes 4.67a 1.52b 3.52a 1.86b 0.64 < 0.01 0.53 0.25
 Synergistetes 0.01 0 0 0.01 0.01 1 1 0.18
 Tenericutes 5.06a 2.95b 4.4a 2.14b 0.51 < 0.01 0.16 0.88
 Verrucomicrobia 0.16a 0b 0.15b 0.01b 0.05 < 0.01 1 0.8
 Unclassified 1.42 1.31 1.27 2.36 0.37 0.2 0.24 0.12
Eukaryota 0.41 0.4 0.26 1.15 0.46 0.18 0.93 0.16
 Chlorophyta 0.04 0.01 0.02 0 0.02 0.21 0.52 1
 Streptophyta 0.1 0.14 0.05 0.29 0.1 0.18 0.62 0.33
 Unclassified 0.11 0.02 0.41 0.15 0.19 0.37 0.28 0.65
  1. 1SEM standard error of mean
  2. a, bLSmeans with different letters within SCFP treatment (No SCFP or SCFP) differ (P < 0.05)
  3. x, yLSmeans with different letters within SCFP treatment (No SCFP or SCFP) tend to differ (P < 0.10)