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Fig. 4 | BMC Microbiology

Fig. 4

From: Application of hierarchical oligonucleotide primer extension (HOPE) to assess relative abundances of ammonia- and nitrite-oxidizing bacteria

Fig. 4

Correlative trends between effluent quality of the trickling nitrification biofilm reactor and the abundance ratio of predominant AOB and NOB. Concentrations of ammonium (NH4 +), nitrite (NO2 −), nitrate (NO3 −) and chemical oxygen demand (COD) in the effluent stream of the trickling nitrification biofilm reactor column throughout the different operational phases (a). The ratio of Nse1472-, Nso190- and Nsv443-targeted AOB against Ntspa712-targeted NOB, obtained using HOPE (b). The ratio of Nitrosospira and Nitrosomonas against Nitrospira, obtained using amplicon sequencing (c)

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