Figure 6. A. Rooted neighbor-joining phylogenetic tree of Gammaproteobacteria involved in DIC assimilation obtained from 16S rRNA gene clone libraries of ¹³C fractions from SIP experiments conducted at NH-10, CR-20, and LP-6 in May 2010.

Highly similar OTUS were collapsed for clarity. Shaded clades represent those identified by Swan et al., 2012 to contain RubisCo and possibly participate in dark carbon fixation.