Fig. 3: Changes in methanogenic community.

a Shifts in methanogenic community composition under experimental warming or cooling by 4 °C. b Mean percentages of the dominant methanogenic archaea and their differences among the studied thermal treatments. RT, reference temperature (12°C). GKR, the Greater Khingan Range; TP, the Tibetan Plateau. **P < 0.001; ***P < 0.0001. Ordinary one-way ANOVA for comparing the three thermal treatments. Data are presented as mean values ± SEM in b, n = 4 independent soil samples.