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. 2014 Aug 22;9(8):e105689. doi: 10.1371/journal.pone.0105689

Figure 2. Seasonal composition of aeration-basin bacterial community samples, as represented by the number of OTUs.

Figure 2

The composition is shown at the phylum level, or at the class level for the phylum Proteobacteria. An OTU was counted present if it was detected in at least two of three sample replicates.