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Wall, Marlene; Prada, Fiorella; Fietzke, Jan; Caroselli, Erik; Dubinsky, Zvy; Brizi, Leonardo; Fantazzini, Paola; Franzellitti, Silvia; Montagna, Paolo; Falini, Giuseppe; Goffredo, Stefano (2019): Seawater carbonate chemistry and internal carbonate chemistry regulation and calcification in corals growing at a Mediterranean CO2 vent. PANGAEA, https://doi.org/10.1594/PANGAEA.911497, Supplement to: Wall, M et al. (2019): Linking Internal Carbonate Chemistry Regulation and Calcification in Corals Growing at a Mediterranean CO2 Vent. Frontiers in Marine Science, 6, https://doi.org/10.3389/fmars.2019.00699

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Abstract:
Corals exert a strong biological control over their calcification processes, but there is a lack of knowledge on their capability of long-term acclimatization to ocean acidification (OA). We used a dual geochemical proxy approach to estimate the calcifying fluid pH (pHcf) and carbonate chemistry of a Mediterranean coral (Balanophyllia europaea) naturally growing along a pH gradient (range: pHTS 8.07–7.74). The pHcf derived from skeletal boron isotopic composition (δ11B) was 0.3–0.6 units above seawater values and homogeneous along the gradient (mean +/- SEM: Site 1 = 8.39 +/- 0.03, Site 2 = 8.34 +/- 0.03, Site 3 = 8.34 +/- 0.02). Also carbonate ion concentration derived from B/Ca was homogeneous [mean +/- SEM (μmol /kg): Site 1 = 579 +/- 34, Site 2 = 541 +/- 27, Site 3 = 568 +/- 30] regardless of seawater pH. Furthermore, gross calcification rate (GCR, mass of CaCO3 deposited on the skeletal unit area per unit of time), estimated by a “bio-inorganic model” (IpHRAC), was homogeneous with decreasing pH. The homogeneous GCR, internal pH and carbonate chemistry confirm that the features of the “building blocks” – the fundamental structural components – produced by the biomineralization process were substantially unaffected by increased acidification. Furthermore, the pH up-regulation observed in this study could potentially explain the previous hypothesis that less “building blocks” are produced with increasing acidification ultimately leading to increased skeletal porosity and to reduced net calcification rate computed by including the total volume of the pore space. In fact, assuming that the available energy at the three sites is the same, this energy at the low pH sites could be partitioned among fewer calicoblastic cells that consume more energy given the larger difference between external and internal pH compared to the control, leading to the production of less building blocks (i.e., formation of pores inside the skeleton structure, determining increased porosity). However, we cannot exclude that also dissolution may play a role in increasing porosity. Thus, the ability of scleractinian corals to maintain elevated pHcf relative to ambient seawater might not always be sufficient to counteract declines in net calcification under OA scenarios.
Keyword(s):
Acid-base regulation; Animalia; Balanophyllia europaea; Benthic animals; Benthos; Calcification/Dissolution; Cnidaria; CO2 vent; Coast and continental shelf; Field observation; Mediterranean Sea; Single species; Temperate
Further details:
Gattuso, Jean-Pierre; Epitalon, Jean-Marie; Lavigne, Héloïse; Orr, James C; Gentili, Bernard; Hagens, Mathilde; Hofmann, Andreas; Mueller, Jens-Daniel; Proye, Aurélien; Rae, James; Soetaert, Karline (2019): seacarb: seawater carbonate chemistry with R. R package version 3.2.12. https://CRAN.R-project.org/package=seacarb
Comment:
In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Gattuso et al, 2019) 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 2020-01-28.
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1TypeTypeWall, Marlenestudy
2SiteSiteWall, Marlene
3SpeciesSpeciesWall, Marlene
4Registration number of speciesReg spec noWall, MarleneWoRMS Aphia ID
5Uniform resource locator/link to referenceURL refWall, Marlene
6pHpHWall, Marlenetotal scale
7δ11Bδ11B‰ SRMWall, Marleneskeletal
8δ11B, standard deviationδ11B std dev±Wall, Marleneskeletal
9Calcifying fluid, pHCF pHWall, Marlene
10Calcifying fluid, pH, standard errorCF pH std e±Wall, Marlene
11pH changeD pHWall, MarlenepH-up-regulation
12pH change, standard errorpH change std e±Wall, MarlenepH-up-regulation
13Boron/Calcium ratioB/Caµmol/molWall, Marlene
14Boron/Calcium ratio, standard errorB/Ca std e±Wall, Marlene
15Calcifying fluid, carbonate ionCF [CO3]2-µmol/kgWall, Marlene
16Calcifying fluid, carbonate ion, standard errorCF [CO3]2- std e±Wall, Marlene
17RatioRatioWall, MarleneDIC up-regulation (DICcf/DICsw)
18Ratio, standard errorRatio std e±Wall, MarleneDIC up-regulation (DICcf/DICsw)
19Calcifying fluid, dissolved inorganic carbonCF DICµmol/kgWall, Marlene
20Calcifying fluid, dissolved inorganic carbon, standard errorCF DIC std e±Wall, Marlene
21Calcifying fluid, aragonite saturation stateCF Omega ArgWall, Marlene
22Gross calcification rate, relativeGCR relWall, MarleneRelative
23Gross calcification rate of calcium carbonateGC CaCO3µmol/cm2/hWall, Marlene
24Net calcification rate, relativeNCR relWall, MarleneRelative micro
25Calcification rate of calcium carbonateCalc rate CaCO3g/cm2/aWall, Marlenemicro net
26Net calcification rate, relativeNCR relWall, MarleneRelative bulk
27Calcification rate of calcium carbonateCalc rate CaCO3g/cm2/aWall, Marlenebulk net
28pHpHWall, Marlenetotal scale, min
29pHpHWall, Marlenetotal scale, max
30Temperature, waterTemp°CWall, Marlenemean
31Temperature, waterTemp°CWall, Marlenemin
32Temperature, waterTemp°CWall, Marlenemax
33Alkalinity, totalATµmol/kgWall, Marlenemean
34Alkalinity, totalATµmol/kgWall, Marlenemin
35Alkalinity, totalATµmol/kgWall, Marlenemax
36SalinitySalWall, Marlenemean
37SalinitySalWall, Marlenemin
38SalinitySalWall, Marlenemax
39Carbonate system computation flagCSC flagYang, YanCalculated using seacarb after Nisumaa et al. (2010)
40Carbon dioxideCO2µmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
41Fugacity of carbon dioxide (water) at sea surface temperature (wet air)fCO2water_SST_wetµatmYang, YanCalculated using seacarb after Nisumaa et al. (2010)
42Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)pCO2water_SST_wetµatmYang, YanCalculated using seacarb after Nisumaa et al. (2010)
43Bicarbonate ion[HCO3]-µmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
44Carbonate ion[CO3]2-µmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
45Carbon, inorganic, dissolvedDICµmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
46Aragonite saturation stateOmega ArgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
47Calcite saturation stateOmega CalYang, YanCalculated using seacarb after Nisumaa et al. (2010)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
1459 data points

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