FIGURE 2.

Relative abundances of the fungus in (A–F) DNA and (G–K) RNA communities as a function of soil ¹⁴C enrichment, mean residence time (MRT), δ¹³C content, C and N concentrations and pH value. Lines are best fits, derived from linear and (B,H) three-parameter Gaussian functions. Note that one sample, assigned a MRT of 9 or 77 years, was excluded from (B) and (H), and that the association between the relative abundance of the fungus in the RNA community and soil pH value was not significant.