Figure 7. Relationship between mean ΔH⁺ and ΔO₂ at different pCO₂ treatment groups for light (30 µmol photons m⁻² s⁻¹) and dark conditions.

Each point represents an individual foraminiferal test (mean ± SE, n = 2–4). Solid lines indicate linear correlations for the different pCO₂ treatment groups, dashed lines indicate the respective ΔO₂ and ΔH⁺ zero-lines.