Table 1.
Enrichment | GTGT-0 | GDGT fractional abundancea |
TEX86b | Tempc (°C) | |||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
0 | 1 | 1′ | 1″ | 2 | 2′ | 2″ | 3 | 3′ | 3″ | 4 | 4′ | cren | cren′ | ||||
“Ca. Nitrosoarchaeum limnia” | 0.001 | 0.35 | 0.17 | 0.01 | ND | 0.05 | 0.005 | ND | 0.01 | 0.006 | ND | 0.04 | 0.005 | 0.34 | 0.004 | 0.27 | −0.6 |
SJ | 0.00 | 0.26 | 0.08 | 0.01 | 0.004 | 0.11 | 0.02 | 0.01 | 0.08 | 0.03 | 0.03 | 0.12 | ND | 0.24 | 0.01 | 0.70 | 28.0 |
AR | 0.001 | 0.31 | 0.10 | 0.01 | 0.002 | 0.09 | 0.01 | 0.003 | 0.04 | 0.02 | 0.008 | 0.04 | ND | 0.35 | 0.006 | 0.56 | 21.4 |
GDGTs with ′ or ″ indicate isomers identified in the respective chromatograms (exact structures unknown); numbers correspond to the structures shown in Fig. 1. cren, crenarchaeol. ND, not detected.
TEX86 values were calculated according to the method of Schouten et al. (35).
Temperature was calculated according to the method of Kim et al. (18) using the TEX86H calibration for SJ and AR and the TEX86L calibration for “Ca. Nitrosoarchaeum limnia.”