Not logged in
PANGAEA.
Data Publisher for Earth & Environmental Science

Jury, Christopher P; Whitehead, Robert F; Szmant, A M (2010): Seawater carbonate chemistry and calcification during experiments with a coral Madracis auretenra, 2010. PANGAEA, https://doi.org/10.1594/PANGAEA.729055, Supplement to: Jury, CP et al. (2010): Effects of variations in carbonate chemistry on the calcification rates of Madracis auretenra (= Madracis mirabilis sensu Wells, 1973): bicarbonate concentrations best predict calcification rates. Global Change Biology, 16(5), 1632-1644, https://doi.org/10.1111/j.1365-2486.2009.02057.x

Always quote above citation when using data! You can download the citation in several formats below.

RIS CitationBibTeX Citation

Abstract:
Physiological data and models of coral calcification indicate that corals utilize a combination of seawater bicarbonate and (mainly) respiratory CO2 for calcification, not seawater carbonate. However, a number of investigators are attributing observed negative effects of experimental seawater acidification by CO2 or hydrochloric acid additions to a reduction in seawater carbonate ion concentration and thus aragonite saturation state. Thus, there is a discrepancy between the physiological and geochemical views of coral biomineralization. Furthermore, not all calcifying organisms respond negatively to decreased pH or saturation state. Together, these discrepancies suggest that other physiological mechanisms, such as a direct effect of reduced pH on calcium or bicarbonate ion transport and/or variable ability to regulate internal pH, are responsible for the variability in reported experimental effects of acidification on calcification. To distinguish the effects of pH, carbonate concentration and bicarbonate concentration on coral calcification, incubations were performed with the coral Madracis auretenra (= Madracis mirabilis sensu Wells, 1973) in modified seawater chemistries. Carbonate parameters were manipulated to isolate the effects of each parameter more effectively than in previous studies, with a total of six different chemistries. Among treatment differences were highly significant. The corals responded strongly to variation in bicarbonate concentration, but not consistently to carbonate concentration, aragonite saturation state or pH. Corals calcified at normal or elevated rates under low pH (7.6-7.8) when the seawater bicarbonate concentrations were above 1800 µm. Conversely, corals incubated at normal pH had low calcification rates if the bicarbonate concentration was lowered. These results demonstrate that coral responses to ocean acidification are more diverse than currently thought, and question the reliability of using carbonate concentration or aragonite saturation state as the sole predictor of the effects of ocean acidification on coral calcification.
Comment:
In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Lavigne and Gattuso, 2011) was used to compute a complete and consistent set of carbonate system variables, as described by Nisumaa et al. (2010). In this dataset the original values were archived in addition with the recalculated parameters (see related PI).
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethodComment
1DateDateSzmant, A M
2IdentificationIDSzmant, A M
3Experimental treatmentExp treatSzmant, A M
4Carbonate system computation flagCSC flagNisumaa, Anne-MarinCalculated using seacarb after Nisumaa et al. (2010)
5SalinitySalSzmant, A M
6Temperature, waterTemp°CSzmant, A M
7Radiation, photosynthetically activePARµmol/m2/sSzmant, A M
8pHpHSzmant, A Mm-cresol purple, Clayton & Byrne 1993Total scale
9Alkalinity, totalATµmol/kgSzmant, A MAlkalinity, measured accrding to Yao and Byrne (1998)
10Carbon dioxideCO2µmol/kgNisumaa, Anne-MarinCalculated using seacarb after Nisumaa et al. (2010)
11Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)pCO2water_SST_wetµatmNisumaa, Anne-MarinCalculated using seacarb after Nisumaa et al. (2010)
12Fugacity of carbon dioxide (water) at sea surface temperature (wet air)fCO2water_SST_wetµatmNisumaa, Anne-MarinCalculated using seacarb after Nisumaa et al. (2010)
13Bicarbonate ion[HCO3]-µmol/kgNisumaa, Anne-MarinCalculated using seacarb after Nisumaa et al. (2010)
14Carbonate ion[CO3]2-µmol/kgNisumaa, Anne-MarinCalculated using seacarb after Nisumaa et al. (2010)
15Carbon, inorganic, dissolvedDICµmol/kgNisumaa, Anne-MarinCalculated using seacarb after Nisumaa et al. (2010)
16Aragonite saturation stateOmega ArgNisumaa, Anne-MarinCalculated using seacarb after Nisumaa et al. (2010)
17Calcite saturation stateOmega CalNisumaa, Anne-MarinCalculated using seacarb after Nisumaa et al. (2010)
18Calcification rate of calcium carbonateCalc rate CaCO3µmol/cm2/hSzmant, A MAluminium foil method (Marsh, 1970)Coral 1
19Calcification rate of calcium carbonateCalc rate CaCO3µmol/cm2/hSzmant, A MAluminium foil method (Marsh, 1970)Coral 2
20Calcification rate of calcium carbonateCalc rate CaCO3µmol/cm2/hSzmant, A MAluminium foil method (Marsh, 1970)Coral 3
21Calcification rate of calcium carbonateCalc rate CaCO3µmol/cm2/hSzmant, A MAluminium foil method (Marsh, 1970)Coral 4
22Calcification rate of calcium carbonateCalc rate CaCO3µmol/cm2/hSzmant, A MAluminium foil method (Marsh, 1970)Coral 5
23Calcification rate of calcium carbonateCalc rate CaCO3µmol/cm2/hSzmant, A MAluminium foil method (Marsh, 1970)Coral 6
Size:
880 data points

Download Data

Download dataset as tab-delimited text (use the following character encoding: )

View dataset as HTML