Table 2.
Abundance of bacterial OTUs represented as individual counts for elevated and ambient [CO2] samples of rhizosphere soil beneath Larrea tridentata.
| Phylum | Class | Number of OTUs
|
P-value | |
|---|---|---|---|---|
| Elevated | Ambient | |||
| Acidobacteria | Acidobacteria | 13 | 5 | 0.09 |
| Actinobacteria | Actinobacteria | 36 | 18 | 8.39E-03 |
| Bacteroidetes | Flavobacteria | 2 | 0 | 0.49 |
| Sphingobacteria | 9 | 6 | 0.60 | |
| Chloroflexi | Cloroflexi | N.D. | 1 | 0.49 |
| Firmicutes | “Bacilli” | 10 | 40 | 3.11E-06 |
| Planctomycetes | Planctomycetacia | 4 | 1 | 0.37 |
| Proteobacteria | Alphaproteobacteria | 59 | 44 | 0.17 |
| Betaproteobacteria | 18 | 24 | 0.32 | |
| Deltaproteobacteria | 5 | 9 | 0.28 | |
| Gammaproteobacteria | 10 | 25 | 7.28E-03 | |
| Unclassified Proteobacteria | 7 | 4 | 0.54 | |
| Gemmatimonadetes | Gemmatimonadetes | 3 | 3 | 1.00 |
| TM7 | TM7 Genera Incertae sedis | 8 | 6 | 0.78 |
| Verrucomicrobia | Verrucomicrobiae | 4 | 2 | 0.68 |
| Unclassified | 20 | 11 | 0.13 | |
| Total | 208 | 199 | N/A | |
P-values were calculated based on the Fisher exact test and are outlined in materials and methods. The threshold to determine significance (alpha value) at the phylum, class, and genus level should be adjusted by the Bonferroni correction, also detailed in materials and methods.
N.D. = not detected, N/A = not applicable.