Fig. 2: Nitrification-derived N2O emission and its source tracing.
From: Nitrifying niche in estuaries is expanded by the plastisphere
a–c N2O emission of different biofilms after the 36-h incubation across the three sampling sites (Experiment 2, n = 4, biological replicates). d N2O emission of different plastisphere after the 36-h incubation (Experiment 3, n = 4, biological replicates). e, f The relative contributions of AOA and AOB-derived NH2OH oxidation and nitrifier denitrification to N2O emission during nitrification in different biofilms and plastisphere (Methods 2.3, n = 4, biological replicates). Calculation errors were estimated using Monte Carlo simulation, which is shown in Supplementary Fig. 19. Nitrifier denitrification dominates N2O emission in the biofilms, while NH2OH oxidation (mainly as the AOB-derived) is the major N2O source in the seawater. Data are presented as mean value ± standard deviation. Different letters indicate the significant differences (one-way ANOVA, P < 0.001 ~ 0.042).
