FIGURE 1.

Labeling proportions (LPs) and identities of bacterial 16S rRNA phylotypes in the ‘heavy’ and ‘middle’ fractions of [¹³C₁]-methanol (A) and [¹³C_u]-substrates (B) treatments of the substrate SIP experiment, and treatments of the pH SIP experiment (C). Cross, additional [¹²C]-methanol supplementation in substrate treatments. Equal colors, the same phylum affiliation. ‘H’ and ’M,’ ‘heavy’ and ‘middle’ fractions, respectively. Values in brackets, contribution of labeled phylotypes to the total number of sequences. The ‘labeling proportions’ are indicators for the relative importance of different taxa assimilating the supplemented ¹³C (directly or indirectly). More detailed taxonomic information can be found in Supplementary Tables S16, S17.