Summary of mean seawater temperature and pCO2 concentration.

Seawater parameters were determined for the 5 week experimental period along with carbonate parameters estimated for experimental treatments, where RCP stands for Representative Concentration Pathway. The five week mean represents the mean of all the parameters over the course of the experiment. Total alkalinity (AT) is a mean of 8 seawater replicate samples per treatment (n = 8) collected weekly both at noon and midnight. Measured parameters are presented with ± standard error of the mean. Output parameters were estimated using the program CO2SYS.