Fig. 6
From: Methanotrophy across a natural permafrost thaw environment
Depth profiles of palsa, bog and fen methanotroph community abundances (as pmoA and mmoX gene reads normalised by total library and HMM length) and relationship to water table, dissolved CH4 concentration and δ13C signature (no porewater present at the palsa site). Metagenome and porewater chemistry data from 2011 and 2012 was averaged across all dates by depth category; error bars represent ± 1 standard error. This shows a link between methanotroph abundances and dissolved CH4 concentration across the thaw gradient. At the bog site, δ13C-CH4 patterns track the depth distribution of the methanotroph community, with the heaviest (most oxidised) CH4 occurring just above the maximum water table depth where methanogen populations are highest and the lightest (least oxidised) CH4 occurring in permanently inundated peat where methanotroph abundances are low
