Table 4.
Results of the PERMANOVAs. PERMANOVA is a phylogenetic-distance-based method to test the association between covariates of interest using the Bray–Curtis distance.
| PERMANOVA Model | Model Terms | Sum Squares | Df | p Value |
|---|---|---|---|---|
| Bray distance (all samples) ~ Sample type | Sample type | 14.6 | 1 | 0.001 * |
| Residuals | 24.5 | 108 | NA | |
| Bray distance(gastric) ~ Location * Horse | Location | 0.628 | 1 | 0.005 * |
| Horse | 1.72 | 5 | 0.009 * | |
| Location:Horse | 0.715 | 5 | 0.7 | |
| Residuals | 7.32 | 54 | NA | |
| Bray distance(fecal) ~ Location * Horse | Location | 0.466 | 1 | 0.001 * |
| Horse | 5.88 | 5 | 0.001 * | |
| Location:Horse | 1.02 | 5 | 0.025 * | |
| Residuals | 6.83 | 43 | NA |
Df = model term degrees of freedom, Location = housing location (pasture or stable), * indicates p < 0.05.