Fig. 1From: Microbial community compositions in different functional zones of Carrousel oxidation ditch system for domestic wastewater treatmentPercentages of the major phyla and major class in Proteobacteria in each WWTP (the sequence percentage is above 2% in at least one WWTP). Clustering on the left presented phylogenetic-based distances between the cases by unweighted UniFrac analysis. Unit of numbers: percentage (%)Back to article page