FIGURE 3.

Class level taxonomic summary of nodule, Rhizosphere and soil samples. (A) Nodules grouped by site. The relative abundance of the nodule samples was summarized at the class level after corrected for 16S operon copy number variation. The humid and arid samples are significantly less diverse than the semi-arid samples, as can be seen in (A). This can be seen here, as the humid site is dominated by Actinobacteria (the genus Frankia), and the arid site is dominated by Acinetobacter and Pseudomonas. (B) Rhizosphere and soil samples grouped by sampling site. These charts show relative abundance of taxa at the class level after correction for 16S operon copy number.