Fig. 4: Environmental distribution of lineage IV Nitrospirales and Nitrospinales.

Relative abundances of 16S rRNA genes grouped at 97% identity level from cultured and uncultured lineage IV Nitrospirales and Nitrospinales taken from publicly available amplicon sequencing datasets. The 16S rRNA gene-based abundance values were obtained from IMNGS. Each data point represents an environmental sample where the respective clade or strain, or closely related organisms, was detected with a minimal relative abundance of 0.1%. Colors represent different source environments.