Table 2.
Relative abundance of SSU rRNA gene clones from Holes 1025C and 1026B fluids.
| Phylogenetic affiliationa | 1025C (n = 70) | 1026B (n = 87) | Representative clones |
|---|---|---|---|
| Archaea | |||
| Crenarchaeota (thaumarchaeota) | |||
| Marine benthic group A | 0 | 1 | 1026B_51 |
| Marine group I | 0 | 2 | 1026B_30, 1026B_73 |
| Euryarchaeota | |||
| DHVEG-6 (Figure 4D) | 0 | 1 | 1026B_15 |
| Bacteria | |||
| Bacteroidetes | |||
| Marinilabiaceae | 1 | 0 | 1025C_63 |
| NS9 | 0 | 2 | 1026B_18 |
| SB-1 | 4 | 0 | 1025C_22, 1025C_61 |
| Cand. phylum SAR406 | 3 | 3 | 1025C_18, 1026B_53, 1026B_13 |
| Chloroflexi | |||
| Anaerolineaceae | 1 | 0 | 1025C_30 |
| Firmicutes | |||
| Acholeplasmataceae | 1 | 0 | 1025C_27 |
| Clostridiaceae | |||
| Alkaliphilus | 1 | 0 | 1025C_01 |
| Ca. Desulforudis (Figure 4A) | 17 | 0 | 1025C_25 |
| Peptococcaceae | |||
| Desulfotomaculum | 1 | 0 | 1025C_05 |
| RF3 (Figure 4B) | 0 | 2 | 1026B_12 |
| Fusibacter | 0 | 1 | 1026B_60 |
| Planctomycetes | |||
| OM190 | 0 | 2 | 1026B_72 |
| Proteobacteria | |||
| Alphaproteobacteria (Figure 6) | |||
| Hyphomicrobiaceae | |||
| 1301A10_076 lineage (Figure 6) | 0 | 1 | 1026B_03 |
| OCS116 (Figure 6) | 0 | 1 | 1026B_24 |
| Rhodobacteraceae | |||
| Roseobacter clade NAC11-7 (Figure 6) | 0 | 1 | 1026B_82 |
| Rhodospirillaceae | |||
| Defluviicoccus | 0 | 1 | 1026B_23 |
| SAR11 | 3 | 17 | 1025C_67, 1026B_29, 1026B_01, 1026B_20, 1026B_52, 1026B_80, 1026B_58, 1026B_41, 1026B_47, 1026B_87, 1026B_69 |
| Betaproteobacteria | |||
| Burkholderiaceae | |||
| Cupriavidus | 0 | 1 | 1026B_67 |
| Deltaproteobacteria (Figure 3) | |||
| Desulfobacteraceae | |||
| Desulfobacula | 0 | 6 | 1026B_07, 1026B_70 |
| Desulfococcus | 3 | 0 | 1025C_53 |
| Desulfobulbaceae | |||
| Desulfobulbus (Figure 3) | 56 | 8 | 1025C_08, 1025C_15, 1026B_06, 1026B_21 |
| Desulfocapsa (Figure 3) | 1 | 0 | 1025C_51 |
| 1301A09_118 lineage | 0 | 2 | 1026B_57 |
| Desulfohalobiaceae (Figure 3) | 0 | 5 | 1026B_19 |
| Desulfovibrionaceae (Figure 3) | 4 | 0 | 1025C_57 |
| Nannocystineae | 0 | 1 | 1026B_76 |
| Nitrospinaceae | 0 | 2 | 1026B_42 |
| SAR324 | 0 | 1 | 1026B_55 |
| Epsilonproteobacteria | |||
| Helicobacteraceae | |||
| Sulfurimonas (Figure 4C) | 0 | 3 | 1026B_05, 1026B_25, 1026B_62 |
| Gammaproteobacteria (Figure 5) | |||
| 9NBGBact_8 (Figure 5) | 0 | 1 | 1026B_74 |
| AGG47 | 0 | 2 | 1026B_34, 1026B_36 |
| Arctic96BD-19 | 0 | 5 | 1026B_64, 1026B_46, 1026B_17 |
| JTB35 | |||
| 1301A10_105 lineage (Figure 5) | 0 | 1 | 1026B_14 |
| Moraxellaceae | 1 | 0 | 1025C_31 |
| OM182 | 0 | 1 | 1026B_83 |
| Pseudoalteromonadaceae | 0 | 9 | 1026B_66, 1026B_79, 1026B_77, 1026B_56, 1026B_35 |
| Pseudomonas | 0 | 5 | 1026B_40, 1026B_86 |
| Thiomicrospira (Figure 5) | 0 | 6 | 1026B_11 |
| Zetaproteobacteria | 0 | 1 | 1026B_31 |
| Verrucomicrobia | |||
| Arctic97B-4 | 0 | 1 | 1026B_59 |
a
Phylogenetic affiliations were determined using SILVA SSU database release 111. In cases where the SILVA taxonomy was inconsistent, lineages were named after the first gene clone derived from the group.