| Phylogenetic groups | Number of 16S rDNA clones | ||||
|
| RS-2018 | CS-2018 | RS2019 | CS-2019 | Total |
| Proteobacteria, total | 46 | 57 | 52 | 54 | 209 |
| α-Proteobacteria | 23 | 16 | 20 | 17 | 76 |
| β-Proteobacteria | 11 | 20 | 16 | 17 | 64 |
| γ-Proteobacteria | 9 | 13 | 12 | 15 | 49 |
| δ-Proteobacteria | 3 | 7 | 4 | 5 | 19 |
| Uncultivated Proteobacteria | 4 | 3 | 2 | 3 | 12 |
| Acidobacteria | 12 | 16 | 13 | 16 | 57 |
| Actinobacteria | 5 | 5 | 7 | 3 | 20 |
| CFB group | 5 | 2 | 3 | 5 | 15 |
| Firmicutes | 6 | 8 | 7 | 5 | 26 |
| Planctomycetes | 3 | 8 | 4 | 7 | 22 |
| Verrucomicrobia | 5 | 3 | 4 | 3 | 15 |
| Unclassified, total | 5 | 2 | 10 | 8 | 25 |
| Total | 100 | 100 | 100 | 100 | 400 |