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Milner, Sara; Langer, Gerald; Grelaud, Michaël; Ziveri, Patrizia (2016): Ocean warming modulates the effects of acidification on Emiliania huxleyi calcification and sinking. PANGAEA, https://doi.org/10.1594/PANGAEA.869470, Supplement to: Milner, S et al. (2016): Ocean warming modulates the effects of acidification on Emiliania huxleyi calcification and sinking. Limnology and Oceanography, 61(4), 1322-1336, https://doi.org/10.1002/lno.10292

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Abstract:
Ongoing ocean warming and acidification are tied to the rapid accumulation of human-induced carbon dioxide (CO2) in the atmosphere and subsequent uptake of heat and CO2 by the surface ocean. These processes are expected to drive large changes in marine ecosystems. While numerous studies have examined the effects of ocean acidification on coccolithophores, less is known on their combined effect. In this study, we investigate temperature modulation of the carbonate chemistry sensitivity of the coccolithophore Emiliania huxleyi (RCC1827 from the Western Mediterranean) in a culture experiment. We analyzed the responses of coccolith morphology, particulate inorganic and organic carbon production, and sinking rate of individual cells. E. huxleyi was exposed to three CO2 levels (ca. 400 µatm, 900 µatm, and 1400 µatm) at 15°C and 20°C. Temperature adds to the negative effect of increasing pCO2 on coccolith morphology, suggesting that a significant number of E. huxleyi strains might suffer from a temperature increase, hampering their evolutionary success. Temperature amplified the positive effect of increasing pCO2 on organic carbon production, while modulating the response of calcification rates, indicating that the response to increasing pCO2 must be taken with caution depending on the temperature range studied. Sinking rates were positively correlated with temperature, whereas pCO2 did not have any effect. The combined effect of carbonate chemistry and temperature on the E. huxleyi ratio between particulate inorganic carbon and particulate organic carbon (PIC/POC) might also lower the sinking rate of aggregates. In conclusion, in a warmer and more acidified ocean, individual coccolithophore cells might sink faster, while aggregates might sink slower.
Further details:
Gattuso, Jean-Pierre; Epitalon, Jean-Marie; Lavigne, Héloise; Orr, James C; Gentili, Bernard; Proye, Aurélien; Soetaert, Karline; Rae, James (2016): seacarb: seawater carbonate chemistry with R. R package version 3.1. 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, 2016) 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 2016-12-13.
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethodComment
1TypeTypeZiveri, Patriziastudy
2SpeciesSpeciesZiveri, Patrizia
3Registration number of speciesReg spec noZiveri, Patrizia
4Uniform resource locator/link to referenceURL refZiveri, PatriziaWoRMS Aphia ID
5TreatmentTreatZiveri, Patrizia
6Coccoliths, normalCocco norm%Ziveri, Patrizia
7Coccoliths, normal, standard deviationCocco norm std dev±Ziveri, Patrizia
8Malformation rateMalformation%Ziveri, PatriziaCoccoliths
9Malformation rate, standard deviationMalformation std dev±Ziveri, PatriziaCoccoliths
10Growth rateµ1/dayZiveri, Patrizia
11Growth rate, standard deviationµ std dev±Ziveri, Patrizia
12Carbon, inorganic, particulate, per cellPIC/cellpg/#Ziveri, PatriziaElement analyzer CHN (Hewlett-Packard)
13Particulate inorganic carbon per cell, standard deviationPIC in cell std dev±Ziveri, PatriziaElement analyzer CHN (Hewlett-Packard)
14Carbon, organic, particulate, per cellPOCpg/#Ziveri, PatriziaElement analyzer CHN (Hewlett-Packard)
15Particulate organic carbon content per cell, standard deviationPOC cont std dev±Ziveri, PatriziaElement analyzer CHN (Hewlett-Packard)
16Particulate inorganic carbon production per cellPIC prodpg/#/dayZiveri, PatriziaElement analyzer CHN (Hewlett-Packard)
17Particulate inorganic carbon, production, standard deviationPIC prod std dev±Ziveri, PatriziaElement analyzer CHN (Hewlett-Packard)
18Production of particulate organic carbon per cellPOC prodpg/#/dayZiveri, PatriziaElement analyzer CHN (Hewlett-Packard)
19Particulate organic carbon, production, standard deviationPOC prod std dev±Ziveri, PatriziaElement analyzer CHN (Hewlett-Packard)
20Particulate inorganic carbon/particulate organic carbon ratioPIC/POC ratioZiveri, PatriziaElement analyzer CHN (Hewlett-Packard)
21Particulate inorganic carbon/particulate organic carbon ratio, standard deviationPIC/POC ratio std dev±Ziveri, PatriziaElement analyzer CHN (Hewlett-Packard)
22Coccosphere, diameterCoccosp diamµmZiveri, Patrizia
23Coccosphere, diameter, standard deviationCoccosp diam std dev±Ziveri, Patrizia
24CoccolithsCocco#Ziveri, Patriziaper coccosphere
25Coccoliths, standard deviationCocco std dev±Ziveri, Patriziaper coccosphere
26Carbon, inorganic, particulate, per cellPIC/cellpg/#Ziveri, PatriziaScanning electron microscope (SEM)
27Particulate inorganic carbon per cell, standard deviationPIC in cell std dev±Ziveri, PatriziaScanning electron microscope (SEM)
28Carbon, organic, particulate, per cellPOCpg/#Ziveri, PatriziaScanning electron microscope (SEM)
29Particulate organic carbon content per cell, standard deviationPOC cont std dev±Ziveri, PatriziaScanning electron microscope (SEM)
30Particulate inorganic carbon/particulate organic carbon ratioPIC/POC ratioZiveri, PatriziaScanning electron microscope (SEM)
31Particulate inorganic carbon/particulate organic carbon ratio, standard deviationPIC/POC ratio std dev±Ziveri, PatriziaScanning electron microscope (SEM)
32DensityDensitypg/µm3Ziveri, Patriziaoverall
33Density, standard deviationDensity std dev±Ziveri, Patriziaoverall
34Sinking velocitySinking Vnm/sZiveri, Patrizia
35Sinking velocity, standard deviationSinking V std dev±Ziveri, Patrizia
36Sinking velocitySinking Vm/dayZiveri, Patrizia
37Sinking velocity, standard deviationSinking V std dev±Ziveri, Patrizia
38SalinitySalZiveri, Patrizia
39Temperature, waterTemp°CZiveri, Patrizia
40Alkalinity, totalATµmol/kgZiveri, Patriziabeginning
41Carbon, inorganic, dissolvedDICµmol/kgZiveri, Patriziabeginning
42pHpHZiveri, Patriziabeginning, NBS scale
43Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)pCO2water_SST_wetµatmZiveri, Patriziabeginning
44Bicarbonate ion[HCO3]-µmol/kgZiveri, Patriziabeginning
45Carbonate ion[CO3]2-µmol/kgZiveri, Patriziabeginning
46Calcite saturation stateOmega CalZiveri, Patriziabeginning
47Alkalinity, totalATµmol/kgZiveri, Patriziaend
48Alkalinity, total, standard deviationAT std dev±Ziveri, Patriziaend
49Carbon, inorganic, dissolvedDICµmol/kgZiveri, Patriziaend
50Carbon, inorganic, dissolved, standard deviationDIC std dev±Ziveri, Patriziaend
51pHpHZiveri, Patriziaend, NBS scale
52pH, standard deviationpH std dev±Ziveri, Patriziaend, NBS scale
53Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)pCO2water_SST_wetµatmZiveri, Patriziaend
54Partial pressure of carbon dioxide, standard deviationpCO2 std dev±Ziveri, Patriziaend
55Bicarbonate ion[HCO3]-µmol/kgZiveri, Patriziaend
56Bicarbonate ion, standard deviation[HCO3]- std dev±Ziveri, Patriziaend
57Carbonate ion[CO3]2-µmol/kgZiveri, Patriziaend
58Carbonate ion, standard deviation[CO3]2- std dev±Ziveri, Patriziaend
59Calcite saturation stateOmega CalZiveri, Patriziaend
60Calcite saturation state, standard deviationOmega Cal std dev±Ziveri, Patriziaend
61Carbonate system computation flagCSC flagYang, YanCalculated using seacarb after Nisumaa et al. (2010)
62pHpHYang, YanCalculated using seacarb after Nisumaa et al. (2010)beginning, total scale
63Carbon dioxideCO2µmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)beginning
64Fugacity of carbon dioxide (water) at sea surface temperature (wet air)fCO2water_SST_wetµatmYang, YanCalculated using seacarb after Nisumaa et al. (2010)beginning
65Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)pCO2water_SST_wetµatmYang, YanCalculated using seacarb after Nisumaa et al. (2010)beginning
66Bicarbonate ion[HCO3]-µmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)beginning
67Carbonate ion[CO3]2-µmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)beginning
68Carbon, inorganic, dissolvedDICµmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)beginning
69Aragonite saturation stateOmega ArgYang, YanCalculated using seacarb after Nisumaa et al. (2010)beginning
70Calcite saturation stateOmega CalYang, YanCalculated using seacarb after Nisumaa et al. (2010)beginning
71pHpHYang, YanCalculated using seacarb after Nisumaa et al. (2010)end, total scale
72Carbon dioxideCO2µmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)end
73Fugacity of carbon dioxide (water) at sea surface temperature (wet air)fCO2water_SST_wetµatmYang, YanCalculated using seacarb after Nisumaa et al. (2010)end
74Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)pCO2water_SST_wetµatmYang, YanCalculated using seacarb after Nisumaa et al. (2010)end
75Bicarbonate ion[HCO3]-µmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)end
76Carbonate ion[CO3]2-µmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)end
77Carbon, inorganic, dissolvedDICµmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)end
78Aragonite saturation stateOmega ArgYang, YanCalculated using seacarb after Nisumaa et al. (2010)end
79Calcite saturation stateOmega CalYang, YanCalculated using seacarb after Nisumaa et al. (2010)end
Size:
474 data points

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