Figure 2.

Short‐term modulations in photosynthetic and respiratory O₂ fluxes of Emiliania huxleyi in response to low dissolved inorganic carbon (DIC)/high pH (L_DICH _pH; white bars), as well as carbonation (H_DICH _pH; dashed, light grey bars), acidification (L_DICL _pH; light grey bars) and the combination of both (H_DICL _pH; dashed, dark grey bars): Chla‐normalized photosynthetic net O₂ evolution (Phot; a, b) and respiration (Resp; c, d) were measured at low and high photon flux densities (PFD; 180 and 700 μmol photons m⁻² s⁻¹). Data are shown for the diploid life‐cycle stage acclimated to low and high light (2N LL, 2N HL). Note: in 2N HL, no data for the L_DICL _pH condition were obtained. Error bar indicate mean ± SD (n = 3). Different lower‐case characters indicate significant differences between the fluxes obtained at different carbonate chemistry conditions and same PFD.