Figure 2.

Top 10 proportionally dominant bacteria OTUs by variable region and category coloured by class. NR equals ‘New Reference’. Percent is within variable region category. L and S refer to large and small size fractions; shallow and deep to above and below the mixed layer depth, respectively. One asterisk indicates an OTU shared between variable regions of the same category, two indicate a shared most common OTU. The Greengenes database version 13.8 (McDonald et al. 2012), which contains chimera-checked, full-length 16S rRNA genes, was used for reference.