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Henehan, Michael J; Evans, David; Shankle, Madison; Burke, Janet; Foster, Gavin L; Anagnostou, Eleni; Chalk, Thomas B; Stewart, Joseph A; Alt, Claudia H S; Hull, Pincelli M; Durrant, Joseph (2017): Seawater carbonate chemistry and foraminiferal calcification. PANGAEA, https://doi.org/10.1594/PANGAEA.923860

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Abstract:
The response of the marine carbon cycle to changes in atmospheric CO2 concentrations will be determined, in part, by the relative response of calcifying and non-calcifying organisms to global change. Planktonic foraminifera are responsible for a quarter or more of global carbonate production, therefore understanding the sensitivity of calcification in these organisms to environmental change is critical. Despite this, there remains little consensus as to whether, or to what extent, chemical and physical factors affect foraminiferal calcification. To address this, we directly test the effect of multiple controls on calcification in culture experiments and core-top measurements of Globigerinoides ruber. We find that two factors, body size and the carbonate system, strongly influence calcification intensity in life, but that exposure to corrosive bottom waters can overprint this signal post mortem. Using a simple model for the addition of calcite through ontogeny, we show that variable body size between and within datasets could complicate studies that examine environmental controls on foraminiferal shell weight. In addition, we suggest that size could ultimately play a role in determining whether calcification will increase or decrease with acidification. Our models highlight that knowledge of the specific morphological and physiological mechanisms driving ontogenetic change in calcification in different species will be critical in predicting the response of foraminiferal calcification to future change in atmospheric pCO2.
Keyword(s):
Benthos; Bottles or small containers/Aquaria (<20 L); Calcification/Dissolution; Chromista; Coast and continental shelf; Foraminifera; Globigerinoides ruber; Growth/Morphology; Heterotrophic prokaryotes; Laboratory experiment; Red Sea; Single species; Temperate
Supplement to:
Henehan, Michael J; Evans, David; Shankle, Madison; Burke, Janet; Foster, Gavin L; Anagnostou, Eleni; Chalk, Thomas B; Stewart, Joseph A; Alt, Claudia H S; Hull, Pincelli M; Durrant, Joseph (2017): Size-dependent response of foraminiferal calcification to seawater carbonate chemistry. Biogeosciences, 14(13), 3287-3308, https://doi.org/10.5194/bg-14-3287-2017
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 2020-10-14.
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1TypeTypeHenehan, Michael Jstudy
2SpeciesSpeciesHenehan, Michael J
3ExperimentExpHenehan, Michael J
4Temperature, waterTemp°CHenehan, Michael J
5Magnesium/Calcium ratioMg/CaHenehan, Michael Jseawater
6pHpHHenehan, Michael Jtotal scale
7pH, standard errorpH std e±Henehan, Michael Jtotal scale
8Carbon, inorganic, dissolvedDICµmol/lHenehan, Michael J
9Carbonate ion[CO3]2-µmol/lHenehan, Michael J
10Calcification intensityCalc intµg/mm2Henehan, Michael J
11Calcification intensity, standard errorCalc int std e±Henehan, Michael J
12AreaAreacm2Henehan, Michael JInitial product of axes
13Chamber numberChamber noHenehan, Michael Jaddition
14Calcification intensityCalc intµg/mm2Henehan, Michael JResidual
15SalinitySalHenehan, Michael J
16Carbonate system computation flagCSC flagYang, YanCalculated using seacarb after Nisumaa et al. (2010)
17Carbon dioxideCO2µmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
18Fugacity of carbon dioxide (water) at sea surface temperature (wet air)fCO2water_SST_wetµatmYang, YanCalculated using seacarb after Nisumaa et al. (2010)
19Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)pCO2water_SST_wetµatmYang, YanCalculated using seacarb after Nisumaa et al. (2010)
20Bicarbonate ion[HCO3]-µmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
21Carbonate ion[CO3]2-µmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
22Carbon, inorganic, dissolvedDICµmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
23Aragonite saturation stateOmega ArgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
24Calcite saturation stateOmega CalYang, YanCalculated using seacarb after Nisumaa et al. (2010)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
264 data points

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