TABLE 3.
Frequency of bacterial phyla in 16S rRNA clone libraries derived from the A, B, unsaturated (C-u), and saturated (C-s) C horizon soil aggregates
| Phylum | % of clone sequencesa in horizon:
|
||||
|---|---|---|---|---|---|
| A | B | C-u | C-s | Totalb | |
| Alphaproteobacteria | 24 | 8 | 16 | 16 | 16 |
| Betaproteobacteria | 1 | 0 | 1 | 1 | 1 |
| Deltaproeteobacteria | 8 | 13 | 4 | 24 | 12 |
| Gammaproteobacteria | 7 | 3 | 3 | 3 | 4 |
| Firmicutes | 0 | 0 | 0 | 12 | 3 |
| Actinobacteria | 8 | 10 | 10 | 9 | 9 |
| Verrucomicrobia | 11 | 20 | 13 | 4 | 12 |
| Planctomycetes | 7 | 1 | 6 | 0 | 4 |
| Acidobacteria | 21 | 39 | 24 | 14 | 25 |
| Chloroflexi | 3 | 0 | 10 | 4 | 4 |
| Bacteroidetes | 7 | 1 | 6 | 0 | 4 |
| Gemmatimonadetes | 3 | 1 | 1 | 3 | 2 |
| OP10 | 0 | 3 | 1 | 1 | 1 |
| WS3 | 0 | 0 | 1 | 0 | 0 |
| Unknown | 3 | 3 | 4 | 9 | 4 |
a
A total of 384 clones were sequenced.
b
Values in bold represent the dominant phyla.