Seawater parameters for the three different pH treatments.

<p>pH<b>_NBS</b>, temperature (T), salinity (Sal) and total alkalinity (A_T) were measured directly and used to compute partial pressure levels of carbon dioxide (<i>p</i>CO₂) and seawater saturation states for calcite and aragonite (Ω_Ca and Ω_Ar respectively) using CO2SYS. Means ± S.E.