Cells increased inorganic carbon content and
calcification rate under warm and acidified conditions compared with ambient conditions, whereas organic carbon content and primary production did not show any change.
For example, De Bodt et al. [22] found a 57 % increase in photosynthetic rate under elevated pCO2 that was non-statistically significant (table 6), whereas Langer et al. [15] found a 3 % increase in
calcification rate under elevated pCO2 that was statistically significant (table 6).
Since you state that a decrease in net
calcification could result from a decrease in gross
calcification, an increase in dissolution
rates, or both, you distinguish between these responses and get to the conclusion that the impact of ocean acidification on a creature's net
calcification may be largely controlled by the status of its protective organic cover and that the net slowdown in skeletal growth
under increased CO2 occurs not because these organisms are unable to calcify, but rather because their unprotected skeleton is dissolving faster.