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Table 1 Carbonate system parameters of all hypercapnia experiments with Carcinus maenas

From: Effects of elevated seawater p CO2 on gene expression patterns in the gills of the green crab, Carcinus maenas

  1 week experiment 2009 1 week experiment 2010 11 week experiment 2009
Parameter control experiment control experiment control experiment
C T [μmol/kg] (measured) 2025 ± 29 2242 ± 37 1879 ± 7 2047 ± 10 1999 ± 18 2209 ± 24
A T [μmol/kg] (calculated) 2098 ± 29 2062 ± 26 1904 ± 5 1887 ± 9 2046 ± 19 2061 ± 20
pH (measured) 8.12 ± 0.02 7.24 ± 0.02 8.00 ± 0.02 7.28 ± 0.01 8.06 ± 0.01 7.36 ± 0.01
S (measured) 15.35 ± 0.06 15.30 ± 0.00 13.40 ± 0.02 13.4 ± 0.02 14.80 ± 0.13 14.80 ± 0.13
T (measured) [°C] 12.90 ± 0.16 12.98 ± 0.05 10.87 ± 0.02 10.77 ± 0.13 12.90 ± 0.07 12.90 ± 0.07
p CO2 (calculated) [Pa] 53 ± 2 440 ± 25 68 ± 3 361 ± 9 40 ± 5 230 ± 21
  1. Measured parameters of the carbonate system were assessed daily during the acclimation phase of 1 or 11 weeks, while AT and p CO2 were calculated applying the measured parameters and CO2SYS software (see Material and Methods for details). Under experimental conditions (elevated p CO2), a drop in pH of 0.7 - 0.9 units could be observed. The carbonate system remained stable during the acclimation phase in both, short- (1 week) and long-term (11 weeks) experiments. CT = total dissolved inorganic carbon, AT = total alkalinity, S = salinity, T = temperature, p CO2 = partial pressure of CO2. Values are given as mean with standard deviation.