Table 2. Diversity of Bacteria retrieved from the core using Illumina sequencing of the 16S rRNA gene.
| % in library | Closest relative* | Lineage | Main metabolic traits of the related microorganisms |
|---|---|---|---|
| 27.9 | Halomonas | Gammaproteobacteria; Oceanospirillales; Halomonadaceae | Facultative anaerobic, halophilic, marine bacterium; possible degradation of crude oil by some Halomonas spp. |
| 11.0 | Desulfonauticus | Deltaproteobacteria; Desulfovibrionales; Desulfohalobiaceae | Anaerobic, thermophilic sulfate-reducing bacteria isolated from oil-production water and deep-sea hydrothermal vents |
| 10.1 | Pseudomonas | Gammaproteobacteria; Pseudomonadales; Pseudomonadaceae | Aerobic, known to degrade aromatic hydrocarbons |
| 7.1 | Marinobacter | Gammaproteobacteria; Alteromonadales; Alteromonadaceae | Facultative anaerobic, halophilic, marine bacterium; possible degradation of crude oil by some Marinobacter spp. |
| 6.1 | n.d. | Gammaproteobacteria; Enterobacteriales; Enterobacteriaceae | Facultative anaerobic, many of them are nitrate reducers under anaerobic conditions |
| 5.7 | n.d. | Bacteroidia; Bacteroidales; | |
| 4.2 | n.d. | Clostridia; Clostridiales; Clostridiaceae | Primarily anaerobic; many of its genera are fermenters |
| 2.9 | n.d. | Deltaproteobacteria; Desulfovibrionales; | Obligatory anaerobic, mesophilic or moderately thermophilic sulfate reducers |
| 2.1 | n.d. | [Cloacamonae]; [Cloacamonales]; MSBL8 | Affiliated with Spirochaetes, anaerobic, halotolerant |
| 1.4 | Oceanobacillus | Bacilli; Bacillales; Bacillaceae | Halotolerant, alkaliphilic, mesophilic, facultative anaerobic or strictly aerobic bacterium |
| 1.2 | n.d. | Gammaproteobacteria; Oceanospirillales; Oceanospirillaceae | Most genera are halophilic, aerobic or facultative anaerobic, chemoorganotrophs |
| 1.1 | n.d. | Betaproteobacteria; Burkholderiales; Comamonadaceae | Aerobic organotrophs, anaerobic denitrifiers and Fe(III)-reducing bacteria, hydrogen oxidizers, photoautotrophic and photoheterotrophic bacteria, and fermentative bacteria, members are known to degrade hydrocarbons |
| 0.9 | Ralstonia | Betaproteobacteria; Burkholderiales; Oxalobacteraceae | Aerobic, can reduce nitrate anaerobically, found in both soil and water, used in bioremediation, chlorinated aromatic compounds degrader |
| 0.8 | Desulfovibrio | Deltaproteobacteria; Desulfovibrionales; Desulfovibrionaceae | Anaerobic, sulfate-reducer |
| 0.7 | Pelobacter | Deltaproteobacteria; Desulfuromonadales; Pelobacteraceae | Strictly anaerobic, Fe(III) or S(0) reducer |
| 0.6 | Halanaerobium | Clostridia; Halanaerobiales; Halanaerobiaceae | Anaerobic, halophilic fermentative bacterium |
| 0.4 | n.d. | Flavobacteria; Flavobacteriales; Flavobacteriaceae | |
| 0.4 | Thermovirga | Synergistia; Synergistales; Thermovirgaceae | Moderately thermophilic, anaerobic, sulfur reducing, amino-acid-degrading bacterium |
| 0.3 | Marinilactibacillus | Bacilli; Lactobacillales; Aerococcaceae | Facultative anaerobic, halophilic, alkaliphilic, marine, mesophilic, lactic acid producing bacterium |
| 6.2 | Unassigned | ||
| 9.0 | Other |
Sequences are available at BioProject ID PRJNA301727; n.d.: not determined.