Table 1 Seawater chemistry during four-month preconditioning to a control (ambient pH) and ocean acidification treatment.

From: Effects of water flow and ocean acidification on oxygen and pH gradients in coral boundary layer

Parameter

Control

Ocean Acidification

Salinity

34.6 ± 0.4 (36)

34.6 ± 0.4 (36)

Temperature (ºC)

25.8 ± 0.3 (1,406)

26.0 ± 0.2 (1,224)

pHT

7.97 ± 0.13 (1,406)

7.77 ± 0.14 (1,224)

Daily Minimum pHT

7.77 ± 0.12 (12)

7.58 ± 0.12 (12)

Daily Maximum pHT

8.19 ± 0.04 (12)

7.99 ± 0.06 (12)

TA (µmol kg-1)

2,155 ± 53 (43)

2,156 ± 58 (39)

pCO2 (µatm)

497 ± 190 (1,406)

844 ± 333 (1,224)

Daily Minimum pCO2 (µatm)

249 ± 32 (12)

435 ± 90 (12)

Daily Maximum pCO2 (µatm)

810 ± 215 (12)

1,329 ± 370 (12)

ƒCO2 (µatm)

496 ± 189 (1,406)

841 ± 332 (1,224)

DIC (µmol kg-1)

1,911 ± 80 (1,406)

2,008 ± 79 (1,224)

CO2 (µmol kg-1)

14 ± 5 (1,406)

23 ± 9 (1,224)

\({\text{HCO}}_{3}^{-}\)(µmol kg-1)

1,717 ± 112 (1,406)

1,858 ± 98 (1,224)

\({\text{CO}}_{3}^{2-}\)(µmol kg-1)

180 ± 44 (1,406)

127 ± 35 (1,224)

Ωar

2.88 ± 0.71 (1,406)

2.02 ± 0.56 (1,224)

Ωca

4.36 ± 1.07 (1,406)

3.06 ± 0.84 (1,224)

  1. Partial pressure of CO2 (pCO2), fugacity of CO2 (ƒCO2), dissolved inorganic carbon (DIC), CO2, \({\text{HCO}}_{3}^{-}\), \({\text{CO}}_{3}^{2-}\), aragonite saturation (Ωar), and calcite saturation (Ωca) were calculated using pH and temperature values of a whole day and the value of total alkalinity (TA) and salinity measured on that day. Values are expressed as mean ± 1 SD with sample size (n) of measured parameters (salinity, temperature, pH, TA) and calculated parameters (pCO2, ƒCO2, DIC, CO2, \({\text{HCO}}_{3}^{-}\), \({\text{CO}}_{3}^{2-}\), Ωar, Ωca). pHT, pH on the total scale.
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