Table 2.
Seawater carbonate chemistry during seagrass Thalassia hemprichii and sea urchin Tripneustes gratilla culture. Seawater pCO2, DIC and Ωar were calculated from the measured pH and total alkalinity (TA) using CO2SYS. Values represent mean ± SD.
| Condition | pCO2 (µatm) | pH (NBS scale) | Temperature (°C) | Salinity | TA (µmol/kg) | DIC (µmol/kg) | Ωar | |
|---|---|---|---|---|---|---|---|---|
| T. hemprichii | ||||||||
| Ambient Temp | Control | 304 ± 42 | 8.27 ± 0.05 | 29.4 ± 1.6 | 34.2 ± 0.1 | 2231 ± 14 | 1848 ± 32 | 4.29 ± 0.38 |
| High pCO2 | 988 ± 219 | 7.85 ± 0.09 | 29.3 ± 1.6 | 34.2 ± 0.1 | 2232 ± 13 | 2075 ± 33 | 2.03 ± 0.39 | |
| High Temp | Control | 337 ± 45 | 8.24 ± 0.05 | 32.4 ± 1.6 | 34.2 ± 0.1 | 2231 ± 13 | 1844 ± 30 | 4.42 ± 0.42 |
| High pCO2 | 930 ± 166 | 7.88 ± 0.07 | 32.4 ± 1.6 | 34.2 ± 0.1 | 2233 ± 13 | 2048 ± 30 | 2.34 ± 0.35 | |
| T. gratilla | ||||||||
| Ambient Temp | Control | 375 ± 31 | 8.2 ± 0.03 | 28.7 ± 0.9 | 34.2 ± 0.2 | 2239 ± 10 | 1908 ± 19 | 3.74 ± 0.16 |
| High pCO2 | 895 ± 135 | 7.89 ± 0.06 | 28.7 ± 0.9 | 34.2 ± 0.2 | 2242 ± 12 | 2074 ± 21 | 2.11 ± 0.30 | |
| High Temp | Control | 390 ± 31 | 8.19 ± 0.03 | 31.8 ± 0.8 | 34.2 ± 0.2 | 2239 ± 11 | 1890 ± 20 | 4.01 ± 1.60 |
| High pCO2 | 925 ± 137 | 7.88 ± 0.06 | 31.8 ± 0.7 | 34.2 ± 0.2 | 2240 ± 9 | 2059 ± 24 | 2.3 ± 0.28 | |