Table 1. Summary of OTUs showing different relative abundance in eH2 and aH2 treatments (Likelihood ratio test, P < 0.05).
Altogether, 406 OTUs were more abundant in eH2 and 552 were more abundant in aH2. The eH2 and aH2 rows indicate the treatment in which the identified phylotypes are more abundant. A single or the two most abundant OTUs are identified for each phylum. A list of the 958 OTUs whose distribution was influenced by H2 treatments is provided in the raw data file accompanying the article.
| Treatments | Phyla | Most abundant OTU (order level) |
|---|---|---|
| eH2 | Proteobacteria (27.6%) | Myxococcales |
| Planctomycetes (10.6%) | Gemmatales, Phycisphaerales | |
| Bacteroidetes (9.6%) | Sphingobacteriales | |
| Chloroflexi (9.1%) | Ktedonobacteria | |
| Acidobacteria (7.1%) | Acidobacteriales, Solibacterales | |
| Verrucomicrobia (6.2%) | Verrucomicrobiales | |
| Actinobacteria (5.9%) | Actinomycetales, Solirubrobacterales | |
| Elusimicrobia (3.0%) | FAC88 | |
| Gemmatimonadetes (2.7%) | Gemmatimonadales | |
| Firmicutes (1.5%) | Clostridiales, Bacillales | |
| Archaea (1.0%) | Methanobacteriales | |
| Armatimonadetes (0.7%) | CH21 | |
| Chlorobi (0.2%) | SM1B09 | |
| Others (14.8%) | – | |
| aH2 | Proteobacteria (33.9%) | Rhodospirillales, Myxococcales |
| Acidobacteria (11.4%) | Solibacterales | |
| Planctomycetes (11.1%) | Gemmatales | |
| Chloroflexi (6.2%) | Ktedonobacteria, A4b | |
| Bacteroidetes (5.1%) | Sphingobacteriales | |
| Actinobacteria (4.3%) | Actinomycetales, Acidimicrobiales | |
| Firmicutes (3.8%) | Clostridiales | |
| Verrucomicrobia (3.4%) | Spartobacteriales | |
| Gemmatimonadetes (2.7%) | Gemmatimonadales | |
| Archaea (1.8%) | SD-NA (Crenarchaeota) | |
| Elusimicrobia (1.4%) | Elusimicrobiales, MVP-88 | |
| Armatimonadetes (1.3%) | Chthonomonadales, CH21 | |
| Chlorobi (0.9%) | SM1B09 | |
| Others (12.7%) | – |