Table 2 Seawater carbonate chemistry parameters in the algal cultures and percent carbon and nitrogen content of Isochrysis galbana cultured at 3 different pH conditions. Seawater total scale pH, temperature and total mean alkalinity (mean TA: 2156.13 μmol.kg⁻¹ were used to calculate CO₂ partial pressure (pCO₂), aragonite and calcite saturation states (respectively Ω_Ar and Ω_Ca), for a salinity of 35.0 psu using the package seacarb for R. All values are expressed as mean ± SD.

Control

27.64 ± 1.49^a

9.15 ± 0.39

2172.78 ± 26.80

21 ± 35^a

9.90 ± 1.55^a

14.41 ± 2.34^a

0.0367

0.0043

8.48^a

Medium pH

27.42 ± 1.55^a

7.74 ± 0.13

2154.06 ± 39.47

903 ± 266^b

1.99 ± 0.62^b

2.99 ± 0.93^b

0.0464

0.0049

9.53^a

Low pH

27.52 ± 1.49^a

7.39 ± 0.11

2141.54 ± 37.30

2146 ± 573^c

0.96 ± 0.24^c

1.45 ± 0.36^c

0.0490

0.0036

13.57^b