Fig. 3: Relative abundance of denitrifiers.

Relative fold change in copy numbers of the nirS gene in relation to the mean Ct of aposymbiotic CC7 samples. DNA inputs for qPCR are normalized. All data are presented as mean ± SE (n = 5 animals each). Different letters above bars indicate significant differences between groups (Kruskal–Wallis with Dunn test, P < 0.05).