Calcium fluxes (mol Ca<sup>2+</sup> m<sup>-2</sup> s<sup>-1</sup>) at all experimental light levels (μmol photons m<sup>-2</sup> s<sup>-1</sup>) and two pH levels (8.12, 7.80) in the absence and presence (+AZ) of acetazolamide.

<p>Fluxes were calculated from profiles in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0159057#pone.0159057.g008" target="_blank">Fig 8</a> (CCA I; top) and additional profiles from CCA II (bottom, profiles not shown). Data are means ± SE of multiple measurements from each CCA.</p>