FIGURE 3.

Labeling proportions and identities of fungal ITS phylotypes in the ‘heavy’ and ‘middle’ fractions of [¹³C₁]-methanol (A) and different [¹³C_u]-substrates (B) treatments of the substrate SIP experiment, and of the 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 OTUs 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).