Figure 3.

(A) The low oxygen N cycle with genes examined in this paper indicated. Black arrows indicate denitrification. Purple arrows indicate anammox. Red arrows indicate processes mediated by ammonia and nitrite oxidizing organisms. (B) Comparison of genes between >30 μm and <30 μm fractions at 120 m. Note that nitrate reduction gene narG is on its own axis. amoA and nrfA were <1% of community at 120 m, so are not shown. Sc_nirS and Sc_nxrB indicate genes belonging to anammox bacteria Cand. Scalindua. Nitrospina nxrB represents nitrite oxidizing bacteria. % Community is calculated in comparison to the single copy core gene RNA polymerase (rpoB).