Table 1.
Core- and hydrolysis-derived polar bGDGTs from sediments, in situ cellulose enrichments in GBS, and soil samples along a transect from the hot spring (Figure 1).
| bGDGTs (ng/g dry wt) | |||||
|---|---|---|---|---|---|
| Sample | Temp (°C) | pH | Core | Polar | % Polarb |
| SEDIMENTS | |||||
| Site A | 82.0 | 6.6 | 12 | 3 | 21 |
| Site B | 79.2 | 6.8 | 50 | 13 | 21 |
| Site C | 72.1 | 7.1 | 38 | 8 | 17 |
| Site D | 82.0 | 7.2 | 25 | 6 | 19 |
| Site E | 61.9 | 7.2 | 282 | 53 | 16 |
| ENRICHMENTSa | |||||
| 77AS | 78.8 | 6.8 | 22 | 57 | 72 |
| 77AW | 78.8 | 6.8 | 6 | 9 | 59 |
| 77CS | 78.8 | 6.8 | 63 | 88 | 58 |
| 77CW | 78.8 | 6.8 | 4 | 11 | 72 |
| 85AS | 85.5 | 6.9 | 3 | 6 | 64 |
| 85AW | 85.5 | 6.9 | 3 | 2 | 45 |
| 85CS | 85.5 | 6.9 | 28 | 12 | 29 |
| 85CW | 85.5 | 6.9 | 7 | 3 | 34 |
| SOILS | |||||
| Soil-0 cm | NAd | 8.2 | NA | NA | NA |
| Soil-10 cm | 33.6 | 7.8 | 149 | 8 | 5 |
| Soil-20 cm | 34.0 | 7.8 | 231 | 0 | 0 |
| Soil-30 cm | 30.9 | 7.4 | 319 | 7 | 2 |
| Soil-50 cm | NA | NA | 72 | 76 | 105 |
| Soil-100 cm | 31.7 | 8.2 | NA | NA | NA |
| Soil-150 cm | NA | NA | 2 | 0 | 6 |
| Soil-200 cm | 30.0 | 6.4 | NA | NA | NA |
| Soil-300 cm | NA | NA | 6 | 1 | 13 |
| Soil-500 cm | 30.5 | 9.2 | NA | NA | NA |
| MAATc | 10.7 | ||||
a
Enrichment sample codes consist of three parameters: average temperature (77°C or 85°C), cellulose substrate (A, aspen shavings; C, core stover), and incubation location (W, suspended in water; S, buried in sediment); temperature and pH listed are those measured at the time of sample collection.
b
Hydrolysis-derived polar bGDGTs as a percentage of total (core + polar) bGDGTs.
c
Mean annual air temperature at Gerlach, Nevada (http://www.wunderground.com/weather-forecast/US/NV/Gerlach.html).
d
NA, not available.