Table 1.
Effect of SARA induction on alpha-diversity in the liquid and solid fraction of the ruminal microbiome.1
| Non-SARA | SARA | P-value2 | ||||||
|---|---|---|---|---|---|---|---|---|
| day 1 | day 6 | day 1 | day 6 | SEM | SG | Day | SG × Day | |
| Liquid fraction | ||||||||
| Chao13 | 4030 | 4499 | 5788 | 5019 | 461 | 0.10 | 0.56 | 0.03 |
| Shannon4 | 9.56 | 9.47 | 9.65 | 9.39 | 0.16 | 0.96 | 0.07 | 0.36 |
| Simpson’s4 | 0.996 | 0.995 | 0.996 | 0.995 | 0.0006 | 0.82 | 0.03 | 0.78 |
| Solid fraction | ||||||||
| Chao1 | 2777 | 2555 | 3080 | 3375 | 359 | 0.29 | 0.86 | 0.24 |
| Shannon | 8.35 | 7.91 | 8.43 | 9.20 | 0.44 | 0.27 | 0.59 | 0.06 |
| Simpson’s | 0.979 | 0.969 | 0.983 | 0.998 | 0.014 | 0.38 | 0.76 | 0.21 |
1Non-SARA = cows (n = 7) in which ruminal pH was not <5.6 for 3 h on day 5. SARA = cows (n = 5) in which ruminal pH was <5.6 for 3 h on day 5. 2SG = SARA grouping of cows based on ruminal pH as Non-SARA or SARA. 3An alpha-diversity index that estimates the number of undiscovered species within a sample as a measure of richness. 4Alpha-diversity measures that take into account richness and evenness of the community within a sample.