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Gattuso, Jean-Pierre; Pichon, Michel; Delesalle, Bruno; Canon, C; Frankignoulle, Michel (1996): Seawater carbonate chemistry and calcification during tropical reef studies at Younge reef (Great Barrier Reef), 1996 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.717551, Supplement to: Gattuso, J-P et al. (1996): Carbon fluxes in coral reefs. I. Lagrangian measurement of community metabolism and resulting air-sea CO2 disequilibrium. Marine Ecology Progress Series, 145, 109-121, https://doi.org/10.3354/meps145109

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Abstract:
Community metabolism was investigated using a Lagrangian flow respirometry technique on 2 reef flats at Moorea (French Polynesia) during austral winter and Yonge Reef (Great Barrier Reef) during austral summer. The data were used to estimate related air-sea CO2 disequilibrium. A sine function did not satisfactorily model the diel light curves and overestimated the metabolic parameters. The ranges of community gross primary production and respiration (Pg and R; 9 to 15 g C m-2 d-1) were within the range previously reported for reef flats, and community net calcification (G; 19 to 25 g CaCO3 m-2 d-1) was higher than the 'standard' range. The molar ratio of organic to inorganic carbon uptake was 6:1 for both sites. The reef flat at Moorea displayed a higher rate of organic production and a lower rate of calcification compared to previous measurements carried out during austral summer. The approximate uncertainty of the daily metabolic parameters was estimated using a procedure based on a Monte Carlo simulation. The standard errors of Pg,R and Pg/R expressed as a percentage of the mean are lower than 3% but are comparatively larger for E, the excess production (6 to 78%). The daily air-sea CO2 flux (FCO2) was positive throughout the field experiments, indicating that the reef flats at Moorea and Yonge Reef released CO2 to the atmosphere at the time of measurement. FCO2 decreased as a function of increasing daily irradiance.
Keyword(s):
Benthos; Calcification/Dissolution; Coast and continental shelf; Entire community; Field observation; Soft-bottom community; South Pacific; Tropical
Funding:
Seventh Framework Programme (FP7), grant/award no. 211384: European Project on Ocean Acidification
Sixth Framework Programme (FP6), grant/award no. 511106: European network of excellence for Ocean Ecosystems Analysis
Coverage:
Date/Time Start: 1993-12-07T16:48:00 * Date/Time End: 1993-12-14T20:18:00
Event(s):
Gattuso_etal_96Y * Location: Yonge reef (Great Barrier Reef) * Method/Device: Experiment (EXP)
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 InvestigatorMethod/DeviceComment
1DATE/TIMEDate/TimeGeocode
2SalinitySalGattuso, Jean-Pierre
3Temperature, waterTemp°CGattuso, Jean-PierreThermistor
4Radiation, photosynthetically activePARµmol/m2/sGattuso, Jean-PierreLICOR quantameter (LI-COR LI-192SA)
5Carbonate system computation flagCSC flagNisumaa, Anne-MarinCalculated using seacarb after Nisumaa et al. (2010)
6pHpHGattuso, Jean-PierrepH, ElectrodeNBS scale
7pHpHNisumaa, Anne-MarinCalculated using seacarb after Nisumaa et al. (2010)Total scale
8Alkalinity, totalATmmol(eq)/lGattuso, Jean-PierreTitration potentiometric (Metler-Toledo)
9Alkalinity, totalATµmol/kgGattuso, Jean-PierreCalculatedOriginal data in µEq/l, density, gotten from salinity and temperature, was used for conversion
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 CaCO3mmol/m2/hGattuso, Jean-PierreAlkalinity anomaly technique (Smith and Key, 1975)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
255 data points

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