TABLE 4.
Breakdown of 16S rRNA gene sequence groups, expressed as percentages obtained from the white and orange mats as well as the top 4 cm of sediment beneath the mats
| Location | Bacterial clones
|
||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Total no. | % Alphaproteo- bacteria | % Gammaproteo- bacteria | % Type I meth- anotrophs | % Deltaproteo- bacteria | % Desulfo- bacteraceae (% Desulfo- sarcina variabilis) | % Desulfo- bulbaceae (% Desulfocapsa sulfexigens) | % Desulfur- omonadaceae | % Epsilonproteo- bacteria | % “Ca. Arcobacter sulfidicus” | % Sulfurospirillum arcachonense | |
| White mat | 91 | 1 | 2 | 0 | 32 | 2 (0) | 20 (20) | 9 | 36 | 2 | 2 |
| White mat sediment | 83 | 0 | 8 | 2 | 42 | 30 (23) | 8 (6) | 0 | 0 | 0 | 0 |
| Orange mat | 120 | 3 | 74 | 42 | 7 | 1 (0) | 6 (0) | 0 | 12 | 1 | 0 |
| Orange mat sediment | 88 | 1 | 34 | 7 | 31 | 16 (10) | 10 (1) | 1 | 7 | 0 | 0 |