Calculated fCO2 levels at which rates are inhibited to half of maximum and their corresponding PIC:POC ratios

Calculated fCO2 levels at which growth, calcification and photosynthetic rates are inhibited to half of maximum for E. huxleyi, G. oceanica, S. apsteinii, C. leptoporus and C. pelagicus. PIC:POC ratios were then calculated from modelled metabolic rates (MR) of calcification and photosynthesis at CO2 concentrations corresponding to the above fCO2 values for each rate for each species.