Figure 9.

Copy numbers in Fuyang soil of (A) total archaeal 16S rRNA genes, and of those archaeal 16S rRNA genes belonging to (B) Methanosarcinceae, (C) Methanocellales, and (D) Methanobacteriales at the beginning (left column) and the end (right column) of incubation of Fuyang soil with either rice straw or maize straw in the presence and absence of CH₃F; mean ± SE, n = 3. Different letters indicate significant (p < 0.05) differences between columns. Beginning and end of incubation are as in Figure 1.