Table 1. Numbers of OTUs detected by PhyloChip in major phyla under aCO2 and eCO2 conditions.
| Phylum | OTUs on PhyloChip |
No. of OTUs detected by PhyloChip |
|||
|---|---|---|---|---|---|
| Total (%) | aCO2 | eCO2 | P (t-test) | ||
| Crenarchaeota | 79 | 12 (15.1) | 12.00±0.00 | 12.00±0.00 | 1.000 |
| Euryarchaeota | 224 | 2 (0.9) | 1.00±0.00 | 1.00±0.00 | 1.000 |
| Acidobacteria | 98 | 76 (77.6) | 67.67±6.56 | 64.25±5.96 | 0.195 |
| Actinobacteria | 810 | 289 (35.6) | 233.17±20.32 | 225.92±17.24 | 0.356 |
| Bacteroidetes | 880 | 162 (18.4) | 123.42±14.39 | 119.67±20.00 | 0.603 |
| Chlorobi | 21 | 11 (52.4) | 9.42±1.78 | 8.83±1.59 | 0.406 |
| Chloroflexi | 117 | 44 (37.6) | 37.58±4.58 | 31.33±4.75 | 0.003 |
| Cyanobacteria | 202 | 51 (25.2) | 45.42±3.37 | 43.00±3.19 | 0.085 |
| Firmicutes | 2012 | 384 (19.1) | 312.25±30.54 | 300.75±25.39 | 0.327 |
| Gemmatimonadetes | 15 | 9 (60.0) | 8.67±0.49 | 8.58±0.51 | 0.689 |
| Natronoanaerobium | 7 | 5 (71.4) | 4.00±0.74 | 3.42±0.79 | 0.076 |
| Nitrospira | 29 | 8 (27.6) | 7.3±0.98 | 6.5±1.73 | 0.161 |
| OP10 | 12 | 7 (58.3) | 5.67±1.07 | 4.58±0.67 | 0.007 |
| OP9/JS1 | 12 | 5 (41.6) | 4.25±1.14 | 3.5±1.17 | 0.125 |
| Planctomycetes | 182 | 26 (14.3) | 20.00±4.09 | 17.25±2.22 | 0.053 |
| Proteobacteria | 3170 | 1002 (31.6) | 849.75±70.62 | 837.58±85.72 | 0.708 |
| Spirochaetes | 150 | 36 (24.0) | 33.75±2.93 | 32.67±2.99 | 0.380 |
| Synergistes | 19 | 5 (26.3) | 5.00±0.00 | 5.00±0.00 | 1.000 |
| TM7 | 45 | 9 (20.0) | 8.83±0.58 | 8.25±1.29 | 0.166 |
| Verrucomicrobia | 78 | 36 (46.1) | 28.33±3.92 | 25.75±3.05 | 0.085 |
| Others (<5 OTUs) | 250 | 53 (21.2) | 46.35±9.37 | 37.67±6.35 | 0.173 |
| Unclassified | 329 | 37 (11.2) | 32.92±1.83 | 31.25±3.14 | 0.126 |
| Total | 8741 | 2269 (26.0) | 1916.6±52.03 | 1864.1±57.25 | 0.028 |
Abbreviations: aCO2, ambient CO2; eCO2, elevated CO2; OTU, operational taxonomic unit.
Boldface indicates significantly changed phylotypes or all detected OTUs.