Fig. 5.

Principal coordinate (PCoA) plot based on the Bray-Curtis distance matrix of the bacterial OTUs relative abundance in the sludge samples collected in the four reactors. The samples are linked with dashed lines during the transition state and with solid lines during the stable state. Plots of PCo3 (explains 12.87% variance) vs PCo1 and PCo2 are provided in Supplementary Information Fig. S7.