Fig. 3.

Changes in C, N and [H⁺] during the simulated growth of different protist plankton. See Fig. 1 for schematics of the physiological configurations of these organisms. DIC—dissolved inorganic C (shown attributed to either systems starting with air-sea CO₂ equilibrium of pCO₂ 300 or 600 atm, as p300 or p600, respectively); DOC—dissolved organic C; VOC, VON—voided organic C or N as micro-faeces; NH4—ammonium; NO3—nitrate. Corresponding changes in P are shown in Supplementary material Fig. S4. [H⁺] is shown for the bulk water; the proximal [H⁺] for a portion of the simulation is shown in Supplementary material Fig. S5. See also Supplementary material Table S5.