Fig. 1: Physiological and biogeochemical characteristics of the initial upwelled water and incubations. | ISME Communications

Fig. 1: Physiological and biogeochemical characteristics of the initial upwelled water and incubations.

From: Diminished carbon and nitrate assimilation drive changes in diatom elemental stoichiometry independent of silicification in an iron-limited assemblage

Fig. 1

Measurements of the initial water mass (T0) and control (Ctrl), iron (+Fe) and DFB (+DFB) additions at 72 and 120 h for (A) biogenic silica, bSi (µmol L−1; white) and Chl a (µg L−1; black) concentrations, (B) the maximum photochemical quantum efficiency of PSII (Fv/Fm), (C) molar ratio (µmol L−1:µmol L−1) of bSi to total particulate carbon (bSi:TPC; white) or nitrogen (bSi:TPN; gray), and TPC:TPN (black) and (D) dissolved inorganic carbon (DIC; d−1; white), nitrate (NO3−) uptake rates (d−1; gray), and Si uptake (d−1; black). Chl a, TPC, and TPN data are for the >5 µm size fraction. Mean and standard deviation are shown (n = 3). One-way ANOVA and Tukey’s HSD post hoc test results and significance are shown in Table S5.

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