Table 2. Major OTUs affiliated with the family Geobacteraceae.
| Major OTUa | No. of seq. (%) | Closest match 16S rRNA gene sequence (% identical) |
|---|---|---|
| Bulk soil | ||
| BKS1040 | 22 (25) | Geobacter argillaceus NR_043575 (92%) |
| BKS1347 | 23 (26) | Pelobacter propionicus NR_074975 (97%) |
| BKS1874 | 22 (25) | Geobacter psychrophilus NR_043075 (98%) |
| Others | 21 (24) | |
| Total | 88 (100) | |
| Anode-associated soil | ||
| AAS942 | 62 (20) | Geobacter psychrophilus NR_043075 (96%) |
| AAS1453 | 126 (40) | Geobacter pelophilus NR_026077 (96%) |
| AAS1823 | 43 (14) | Pelobacter propionicus NR_074975 (97%) |
| AAS2083 | 30 (10) | Geobacter pelophilus NR_026077 (91%) |
| Others | 52 (16) | |
| Total | 313 (100) | |
| AM-anode biofilm | ||
| ACE575 | 290 (89) | Geobacter grbicium NR_041826 (95) |
| ACE2318 | 29 (9) | Geobacter psychrophilus NR_043075 (95) |
| Others | 8 (2) | |
| Total | 327 (100) | |
| GM-anode biofilm | ||
| GLU155 | 304 (40) | Geobacter psychrophilus NR_043075 (97%) |
| GLU710 | 39 (5) | Geobacter daltonii NR_074916 (91%) |
| GLU1010 | 233 (30) | Pelobacter propionicus NR_074975 (94) |
| GLU1996 | 40 (5) | Geobacter psychrophilus NR_043075 (97%) |
| Others | 164 (20) | |
| Total | 780 (100) | |
a OTUs that include more than 5% of the total Geobacteraceae sequence tags.