Table 3.
Significant contributions to observed variation for individual bacterial phyla for all three morphological niches.
| Phylum | Source of variation | |||||
|---|---|---|---|---|---|---|
| Unexplained | Morphological niche | p-value | Environment∗ | Contributing environmental factor | p-value | |
| Actinobacteria | 92.11% | 7.01% | 0.007 | 0.15% | - | |
| Acidobacteria | 97.13% | 0.78% | 0.014 | 1.97% | Host | 0.0002 |
| Ammonia | 0.0030 | |||||
| Bacteroidetes | 95.00% | 1.24% | 0.507 | 3.54% | Silicate | 0.0033 |
| Nitrite | 0.0549 | |||||
| Ignavibacteria | 93.14% | 0.00% | 0.177 | 6.86% | Silicate | 0.0080 |
| Proteobacteria | 77.17% | 13.97% | 0.001 | 7.24% | Nitrite | 0.0357 |
| Silicate | 0.0744 | |||||
∗Combination of all environmental variables (geography, host, nutrient levels and temperature).