Figure 3.

Incorporation of ¹³CO₂ into PLFAs, ether lipid-derived hydrocarbons and TOC of mofette soil microbial communities in 0–10 cm and 25–40 cm depths during a 28-day incubation. Incorporation is shown as the difference between δ¹³C at sampling days 5 (light grey bars), 14 (medium grey bars), 28 (dark grey bars) in the ¹³CO₂ treatment compared with the corresponding unlabeled control treatment. Bacterial biomarkers (dots) and archaeal biomarkers (crosses) are highlighted. N.D.=not determined.