Fig. 2From: Application of hierarchical oligonucleotide primer extension (HOPE) to assess relative abundances of ammonia- and nitrite-oxidizing bacteriaMultivariate analysis of the microbial data. The relative abundance of AOB and NOB targeted by HOPE primers revealed differences throughout the operational phases. a. The relative abundances of the total microbial community obtained from high-throughput sequencing also showed similar clustering based on the operational phases (b)Back to article page