Fig. 5: Schematic showing hypothesised spatial niches of AOB and AOA.
From: Marine ammonia-oxidising archaea and bacteria occupy distinct iron and copper niches
Published amoA gene abundance depth profiles (shaded grey area—copies ml−1 references provided in Supplementary Table 1) for AOB (A) and AOB (B) are plotted against NH4+ depth profiles (black dashed line—µmol l−1 from ref. 88) and dissolved Fe, dFe (orange solid line—nmol L−1, data from GEOTRACES Intermediate Data Product 2017). Green wedge labelled light/phytoplankton* reflects the relative decrease in light, phytoplankton and marine bacteria with increasing depth.
