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Glas, Martin S; Fabricius, Katharina Elisabeth; de Beer, Dirk; Uthicke, Sven; Gilbert, Jack Anthony (2012): The O2, pH and Ca2+ Microenvironment of Benthic Foraminifera in a High CO2 World. PANGAEA, https://doi.org/10.1594/PANGAEA.833612, Supplement to: Glas, MS et al. (2012): The O2, pH and Ca2+ Microenvironment of Benthic Foraminifera in a High CO2 World. PLoS ONE, 7(11), e50010, https://doi.org/10.1371/journal.pone.0050010

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Abstract:
Ocean acidification (OA) can have adverse effects on marine calcifiers. Yet, phototrophic marine calcifiers elevate their external oxygen and pH microenvironment in daylight, through the uptake of dissolved inorganic carbon (DIC) by photosynthesis. We studied to which extent pH elevation within their microenvironments in daylight can counteract ambient seawater pH reductions, i.e. OA conditions. We measured the O2 and pH microenvironment of four photosymbiotic and two symbiont-free benthic tropical foraminiferal species at three different OA treatments (~432, 1141 and 2151 µatm pCO2). The O2 concentration difference between the seawater and the test surface (delta O2) was taken as a measure for the photosynthetic rate. Our results showed that O2 and pH levels were significantly higher on photosymbiotic foraminiferal surfaces in light than in dark conditions, and than on surfaces of symbiont-free foraminifera. Rates of photosynthesis at saturated light conditions did not change significantly between OA treatments (except in individuals that exhibited symbiont loss, i.e. bleaching, at elevated pCO2). The pH at the cell surface decreased during incubations at elevated pCO2, also during light incubations. Photosynthesis increased the surface pH but this increase was insufficient to compensate for ambient seawater pH decreases. We thus conclude that photosynthesis does only partly protect symbiont bearing foraminifera against OA.
Keyword(s):
Amphistegina radiata; Benthos; Bottles or small containers/Aquaria ( 20 L); Chromista; Coast and continental shelf; Forams; Heterostegina depressa; Heterotrophic prokaryotes; Laboratory experiment; Marginopora vertebralis; Miliola sp.; Peneroplis sp.; Primary production/Photosynthesis; Quinquelloculina sp.; Single species; South Pacific; Tropical
Further details:
Lavigne, Héloise; Epitalon, Jean-Marie; Gattuso, Jean-Pierre (2014): seacarb: seawater carbonate chemistry with R. R package version 3.0. 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 et al, 2014) 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 is 2014-06-19.
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethodComment
1FigureFigGlas, Martin S
2DateDateGlas, Martin S
3IdentificationIDGlas, Martin Srankgroup
4TreatmentTreatGlas, Martin S
5Time point, descriptiveTime pointGlas, Martin S
6SpeciesSpeciesGlas, Martin S
7GroupGroupGlas, Martin S
8SpeciesSpeciesGlas, Martin Ssymbiont
9Individual codeIndividual codeGlas, Martin S
10SizeSizeµmGlas, Martin S
11PositionPositionGlas, Martin S
12IrradianceEµmol/m2/sGlas, Martin S
13OxygenO2µmol/lGlas, Martin Sseawater
14OxygenO2µmol/lGlas, Martin Ssurface
15OxygenO2µmol/lGlas, Martin Sdifferences between the bulk seawater and the surface of the shells
16SlopeSlopeGlas, Martin SO2
17Hydrogen ion concentrationH+nmol/lGlas, Martin Sdifferences between the bulk seawater and the surface of the shells
18Hydrogen ion concentration, standard deviationH+ std dev±Glas, Martin Sdifferences between the bulk seawater and the surface of the shells
19OxygenO2µmol/lGlas, Martin Smean differences between the bulk seawater and the surface of the shells
20Oxygen, standard deviationO2 std dev±Glas, Martin Sdifferences between the bulk seawater and the surface of the shells
21SlopeSlopeGlas, Martin SO2, mean
22Slope, standard deviationSlope std dev±Glas, Martin SO2
23Calcium ionCa2+mmol/lGlas, Martin Sseawater
24Calcium ionCa2+mmol/lGlas, Martin Ssurface
25Calcium ionCa2+mmol/lGlas, Martin Smean differences between the bulk seawater and the surface of the shells
26SlopeSlopeGlas, Martin SCa+
27SalinitySalGlas, Martin S
28Temperature, waterTemp°CGlas, Martin S
29Temperature, water, standard deviationTemp std dev±Glas, Martin S
30PhosphatePHSPHTµmol/kgGlas, Martin SSpectrophotometric
31Phosphate, standard deviationPO4 std dev±Glas, Martin SSpectrophotometric
32SilicateSILCATµmol/kgGlas, Martin SSpectrophotometric
33Silicate, standard deviationSi(OH)4 std dev±Glas, Martin SSpectrophotometric
34pHpHGlas, Martin SPotentiometricNBS scale
35pH, standard deviationpH std dev±Glas, Martin SPotentiometricNBS scale
36Carbon, inorganic, dissolvedDICµmol/kgGlas, Martin SCoulometric titration
37Carbon, inorganic, dissolved, standard deviationDIC std dev±Glas, Martin SCoulometric titration
38Alkalinity, totalATµmol/kgGlas, Martin SPotentiometric titration
39Alkalinity, totalATµmol/kgGlas, Martin SCalculated using CO2SYS
40Alkalinity, total, standard deviationAT std dev±Glas, Martin SCalculated using CO2SYS
41Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)pCO2water_SST_wetµatmGlas, Martin SCalculated using CO2SYS
42Partial pressure of carbon dioxide, standard deviationpCO2 std dev±Glas, Martin SCalculated using CO2SYS
43Carbon dioxideCO2µmol/kgGlas, Martin SCalculated using CO2SYS
44Carbon dioxide, standard deviationCO2 std dev±Glas, Martin SCalculated using CO2SYS
45Bicarbonate ion[HCO3]-µmol/kgGlas, Martin SCalculated using CO2SYS
46Bicarbonate ion, standard deviation[HCO3]- std dev±Glas, Martin SCalculated using CO2SYS
47Carbonate ion[CO3]2-µmol/kgGlas, Martin SCalculated using CO2SYS
48Carbonate ion, standard deviation[CO3]2- std dev±Glas, Martin SCalculated using CO2SYS
49Calcite saturation stateOmega CalGlas, Martin SCalculated using CO2SYS
50Calcite saturation state, standard deviationOmega Cal std dev±Glas, Martin SCalculated using CO2SYS
51Revelle factorRGlas, Martin SCalculated using CO2SYS
52Revelle factor, standard deviationR std dev±Glas, Martin SCalculated using CO2SYS
53Carbonate system computation flagCSC flagYang, YanCalculated using seacarb after Nisumaa et al. (2010)
54pHpHYang, YanCalculated using seacarb after Nisumaa et al. (2010)total scale
55Carbon dioxideCO2µmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
56Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)pCO2water_SST_wetµatmYang, YanCalculated using seacarb after Nisumaa et al. (2010)
57Fugacity of carbon dioxide (water) at sea surface temperature (wet air)fCO2water_SST_wetµatmYang, YanCalculated using seacarb after Nisumaa et al. (2010)
58Bicarbonate ion[HCO3]-µmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
59Carbonate ion[CO3]2-µmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
60Alkalinity, totalATµmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
61Aragonite saturation stateOmega ArgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
62Calcite saturation stateOmega CalYang, YanCalculated using seacarb after Nisumaa et al. (2010)
Size:
22899 data points

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