Table 1.
Carbonate chemistry for the different CO2 treatments. Values for TA, DIC and pH indicate the mean of triplicate incubations (n = 3; ± sd). pCO2 was calculated based on pH and TA of each incubation, using equilibrium constants by Mehrbach et al. (1973), refitted by Dickson and Millero (1987)
| CO2 treatment | TA (µmol l−1) | DIC (µmol l−1) | pHNBS | pCO2 (µatm) |
|---|---|---|---|---|
| S. trochoidea | ||||
| 180 | 2386 ± 1 | 1972 ± 16 | 8.45 ± 0.01 | 180 ± 6 |
| 380 | 2388 ± 2 | 2096 ± 10 | 8.21 ± 0.02 | 358 ± 15 |
| 800 | 2385 ± 1 | 2223 ± 11 | 7.91 ± 0.03 | 785 ± 55 |
| 1200 | 2386 ± 4 | 2268 ± 18 | 7.77 ± 0.04 | 1133 ± 97 |
| A. tamarense | ||||
| 180 | 2434 ± 3 | 1992 ± 33 | 8.50 ± 0.06 | 162 ± 24 |
| 380 | 2439 ± 1 | 2117 ± 41 | 8.27 ± 0.07 | 315 ± 57 |
| 800 | 2434 ± 2 | 2245 ± 37 | 7.97 ± 0.10 | 706 ± 154 |
| 1200 | 2418 ± 1 | 2283 ± 34 | 7.83 ± 0.12 | 995 ± 248 |