Figure 5.

Predicted physiological and growth response of fleshy macroalgae to CO₂ enrichment based on their carbon uptake strategy and affinity for DIC. Species with a low affinity for DIC are likely to be limited in DIC under current conditions, and species with a high affinity are likely to be saturated for DIC. There is literature evidence that some CCM species are sensitive to increased H⁺ concentrations, illustrated on the right hand side of the figure: Although not illustrated, H⁺ sensitivity for non‐CCM species may also be possible. This figure builds on that of Cornwall et al. (2017)