Table 1.
Sampling location and sample code | Mary Bay West 12 MBW | Mary Bay Canyon 28 V03-13P | Stevenson Island 72 V03-28P | West Thumb Canyon 129 V03-46P | West Thumb 98 V03-36P | Yellowstone Lake station LW-02 |
---|---|---|---|---|---|---|
Sample volume and date | 310 mL 7-16-03 | 190 mL 7-18-03 | 303 mL 7-22-03 | 150 mL 7-29-03 | 303 mL 7-25-03 | N/A 7-1-03 |
Water depth (m) | 1 | 47.9 | 109.3 | 52.4 | 21.7 | 0 |
Temperature (°C) | 19 | 49 | 110 | 77 | 16 | Ambient |
DOC (mg/l) | 1.77 | 1.89 | n.d. | n.d. | 1.45 | n.d. |
H2S (μM) | 2.2 | 119.3 | 59.5 | 17.2 | 0.7 | 0 |
(μM) | 1.3 | 4.5 | 5.3 | 8.4 | 3.7 | 0 |
(μM) | 0.1 | 1.4 | 19.9 | 1.52 | 0.5 | 0 |
(μM) | 104 | 122 | 93 | 187 | 86 | 83 |
(μM) | 1.5 | 12.7 | 11.0 | 8.8 | 0.0 | 0.7 |
(μM) | 0.1 | 0.2 | 0.9 | 1.0 | 0.0 | 0.0 |
SRP (μM) | 0.21 | 1.84 | 0.68 | 2.51 | 0.59 | 0.32 |
SiO2 (μM) | 192 | 325 | 197 | 1865 | 159 | 178 |
Cl− (μM) | 146 | 210 | 132 | 1971 | 156 | 125 |
Summary of dark CO2 fixation rates (μM C h−1) | 1.08, 15°C 6.46, 15°C with S | 1.7 at 15°C 8.6 at 60°C no. S stimulation | <0.01, 15°C 0.4 at 50°C 0.67 at 60°C | Near 0.1 at 50 and 60°C 0.83–1.66, with S, 60°C | Near 0.003 with S, 50°C < 0.003 otherwise | 0.003 |
No. of bacterial 16S rRNA gene sequences | 44 | 23 | 37 | 54 | 38 | |
Aquificales | – | 2 | 16 | 13 | – | |
Gammaproteobacteria | 21 | 5 | 1 | – | 1 | |
Betaproteobacteria | 8 | 3 | 6 | 10 | 13 | |
Alphaproteobacteria | 1 | 1 | – | – | – | |
Deltaproteobacteria | – | 7 | – | – | – | |
Epsilonproteobacteria | – | 1 | – | – | – | |
Actinobacteria | 6 | – | 7 | 10 | 16 | |
Planctomycetales | – | – | 4 | – | 2 | |
CFB phylum | 2 | 1 | – | 3 | – | |
Chloroflexi | 2 | – | – | 6 | 1 | |
Acidobacteria | – | 3 | – | – | – | |
Cyanobacteria | 2 | – | 1 | – | 3 | |
Thermodesulfovibrio | – | – | – | 7 | – | |
Verrucomicrobium | 1 | – | 2 | – | 2 | |
OP10 | 1 | – | – | – | – | |
Chlorobia | – | – | – | 2 | – |