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Asnaghi, Valentina; Mangialajo, Luisa; Gattuso, Jean-Pierre; Francour, Patrice; Privitera, Davide; Chiantore, Mariachiara (2014): Seawater carbonate chemistry, thickness and carbonate elemental composition of the test of juvenile sea urchins in a laboratory experiment. PANGAEA, https://doi.org/10.1594/PANGAEA.833328, Supplement to: Asnaghi, V et al. (2014): Effects of ocean acidification and diet on thickness and carbonate elemental composition of the test of juvenile sea urchins. Marine Environmental Research, 93, 78-84, https://doi.org/10.1016/j.marenvres.2013.08.005

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Abstract:
Continuous anthropogenic CO2 emissions to the atmosphere and uptake by the oceans will cause a reduction of seawater pH and saturation state (Omega) of CaCO3 minerals from which marine calcifiers build their shells and skeletons. Sea urchins use the most soluble form of calcium carbonate, high-magnesium calcite, to build their skeleton, spines and grazing apparatus. In order to highlight the effects of increased pCO2 on the test thickness and carbonate elemental composition of juvenile sea urchins and potential differences in their responses linked to the diet, we performed a laboratory experiment on juvenile Paracentrotus lividus, grazing on calcifying (Corallina elongata) and non-calcifying (Cystoseira amentacea, Dictyota dichotoma) macroalgae, under different pH (corresponding to pCO2 values of 390, 550, 750 and 1000 µatm). Results highlighted the importance of the diet in determining sea urchin size irrespectively of the pCO2 level, and the relevance of macroalgal diet in modulating urchin Mg/Ca ratio. The present study provides relevant clues both in terms of the mechanism of mineral incorporation and in terms of bottom-up processes (algal diet) affecting top-down ones (fish predation) in rocky subtidal communities
Further details:
Lavigne, Héloise; Gattuso, Jean-Pierre (2011): seacarb: seawater carbonate chemistry with R. R package version 2.4. https://cran.r-project.org/package=seacarb
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). The date of carbonate chemistry calculation by seacarb is 2014-03-17.
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethodComment
1SpeciesSpeciesAsnaghi, Valentina
2SpeciesSpeciesAsnaghi, Valentinaalgal diet
3Sample IDSample IDAsnaghi, Valentina
4LocationLocationAsnaghi, Valentina
5Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)pCO2water_SST_wetµatmAsnaghi, Valentinatreatment
6Magnesium/Calcium ratioMg/CaAsnaghi, Valentina
7ReplicateReplicateAsnaghi, Valentina
8Growth rateµmm/monthAsnaghi, Valentina
9ThicknessThickmmAsnaghi, Valentinatest
10DiameterØmmAsnaghi, Valentinatest
11pHpHAsnaghi, ValentinaPotentiometrictotal scale
12pH, standard deviationpH std dev±Asnaghi, ValentinaPotentiometrictotal scale
13Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)pCO2water_SST_wetµatmAsnaghi, ValentinaCalculated using seacarb
14Partial pressure of carbon dioxide, standard deviationpCO2 std dev±Asnaghi, ValentinaCalculated using seacarb
15Alkalinity, totalATµmol/kgAsnaghi, ValentinaPotentiometric titration
16Alkalinity, total, standard deviationAT std dev±Asnaghi, ValentinaPotentiometric titration
17Carbonate ion[CO3]2-µmol/kgAsnaghi, ValentinaCalculated using seacarb
18Carbonate ion, standard deviation[CO3]2- std dev±Asnaghi, ValentinaCalculated using seacarb
19Bicarbonate ion[HCO3]-µmol/kgAsnaghi, ValentinaCalculated using seacarb
20Bicarbonate ion, standard deviation[HCO3]- std dev±Asnaghi, ValentinaCalculated using seacarb
21Carbon, inorganic, dissolvedDICµmol/kgAsnaghi, ValentinaCalculated using seacarb
22Carbon, inorganic, dissolved, standard deviationDIC std dev±Asnaghi, ValentinaCalculated using seacarb
23Calcite saturation stateOmega CalAsnaghi, ValentinaCalculated using seacarb
24Calcite saturation state, standard deviationOmega Cal std dev±Asnaghi, ValentinaCalculated using seacarb
25Aragonite saturation stateOmega ArgAsnaghi, ValentinaCalculated using seacarb
26Aragonite saturation state, standard deviationOmega Arg std dev±Asnaghi, ValentinaCalculated using seacarb
27Temperature, waterTemp°CAsnaghi, Valentina
28Temperature, water, standard deviationTemp std dev±Asnaghi, Valentina
29SalinitySalAsnaghi, Valentina
30Carbonate system computation flagCSC flagYang, YanCalculated using seacarb after Nisumaa et al. (2010)
31Carbon dioxideCO2µmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
32Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)pCO2water_SST_wetµatmYang, YanCalculated using seacarb after Nisumaa et al. (2010)
33Fugacity of carbon dioxide (water) at sea surface temperature (wet air)fCO2water_SST_wetµatmYang, YanCalculated using seacarb after Nisumaa et al. (2010)
34Bicarbonate ion[HCO3]-µmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
35Carbonate ion[CO3]2-µmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
36Carbon, inorganic, dissolvedDICµmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
37Aragonite saturation stateOmega ArgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
38Calcite saturation stateOmega CalYang, YanCalculated using seacarb after Nisumaa et al. (2010)
Size:
3312 data points

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