Fig. 2
From: Ambient nitrate switches the ammonium consumption pathway in the euphotic ocean
Depth profiles of nutrient concentrations and NH4+ consumption rates in the Subtropical Northwest Pacific in spring of 2015. a coastal station P1; b, c Shelf stations P5 and C5; d, e basin stations K1 and X1. The figure shows NO3− concentrations (orange solid dots); NH4+ concentrations (gray solid dots); NH4+ uptake rates (green open squares) and nitrification rates (blue open squares). Gray bars mark the depth range with the steepest NO3− gradient and the black dashed lines within them show the nitracline depth; pink triangles on the right Y-axis mark the euphotic zone depth (0.1% of surface PAR). Error bars of NH4+ uptake and oxidation rates are represented by the standard deviation of triplicates, and are smaller than the symbols where not visible
