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. 2016 Jul 5;7:1035. doi: 10.3389/fmicb.2016.01035

FIGURE 6.

FIGURE 6

Changes in composition of potential (A) ammonia oxidizers, (B) denitrifiers, and (C) nitrogen fixers, as well as (D) concentrations of nitrite, nitrate, and ammonia down the water column. (A–C) We determined taxonomic identification of the 16S rRNA genes classified into OTUs for each functional group using the SILVA database. We summed up the relative abundances of all OTUs classified within the same order or classes. If a genus name is shown, it means that that was the only genus present in a particular order or class. The number of OTUs included in each taxonomic group is indicated with the number given in parentheses after the taxonomic name. If no number is given, the group only contains one OTU. Taxonomic groups with abundances too low to be visible on the graph are labeled with an ‘∗’ and marked with a gray box instead of a colored box. Dashed gray horizontal line shows the oxycline at 5.0 m.