Data Description

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Citation:
Müller, MN et al. (2010): Seawater carbonate chemistry and processes during experiments with Emiliania huxleyi (2005 Bergen) and Coccolithus braarudii (RCC 1200), 2010. doi:10.1594/PANGAEA.744738,
Supplement to: Müller, Marius N; Schulz, Kai Georg; Riebesell, Ulf (2010): Effects of long-term high CO2 exposure on two species of coccolithophores. Biogeosciences, 7(3), 1109-1116, doi:10.5194/bg-7-1109-2010
Abstract:
The physiological performance of two coccolithophore species,Emiliania huxleyi and Coccolithus braarudii, was investigated during long-term exposure to elevated pCO2 levels. Mono-specific cultures were grown over 152 (E. huxleyi) and 65 (C. braarudii) generations while pCO2 was gradually increased to maximum levels of 1150 ?atm (E. huxleyi) and 930 ?atm (C. braarudii) and kept constant thereafter. Rates of cell growth and cell quotas of particulate organic carbon (POC), particulate inorganic carbon (PIC) and total particulate nitrogen (TPN) were determined repeatedly throughout the incubation period. Increasing pCO2 caused a decrease in cell growth rate of 9% and 29% in E. huxleyi and C. braarudii, respectively. In both species cellular PIC:TPN and PIC:POC ratios decreased in response to rising pCO2, whereas no change was observed in the POC:TPN ratios of E. huxleyi and C. braarudii. These results are consistent with those obtained in shorter-term high CO2exposure experiments following abrupt pertubations of the seawater carbonate system and indicate that for the strains tested here a gradual CO2 increase does not alleviate CO2/pH sensitivity.
Project(s):
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).
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethodComment
1Experimental treatment *Exp trtmMüller, Marius N *
2Species *SpeciesMüller, Marius N *
3Experiment day *Exp daydayMüller, Marius N *
4Salinity *SalMüller, Marius N *
5Temperature, water *Temp°CMüller, Marius N *
6Light:Dark cycle *L:Dhh:hhMüller, Marius N *
7Radiation, photosynthetically active *PARµE/m2/sMüller, Marius N *
8Nitrite *[NO2]-µmol/lMüller, Marius N *
9Phosphate *PO4µmol/lMüller, Marius N *
10Partial pressure of carbon dioxide (water) at sea surface temperature (wet air) *pCO2water_SST_wetµatmMüller, Marius N *Duplicate I
11Partial pressure of carbon dioxide (water) at sea surface temperature (wet air) *pCO2water_SST_wetµatmMüller, Marius N *Duplicate II
12pH *pHMüller, Marius N *Metrohm Titrando titrator *Total scale, Duplicate I
13pH *pHMüller, Marius N *Metrohm Titrando titrator *Total scale, Duplicate II
14Growth rate *µ#/dayMüller, Marius N *Calculated *Duplicate I
15Growth rate *µ#/dayMüller, Marius N *Calculated *Duplicate II
16Carbon, organic/Nitrogen, total ratio *Corg/TNMüller, Marius N *Calculated *Duplicate I
17Carbon, organic/Nitrogen, total ratio *Corg/TNMüller, Marius N *Calculated *Duplicate II
18Particulate inorganic carbon vs total particulate nitrogen ratio *PIC/TPNMüller, Marius N *Calculated *Duplicate I
19Particulate inorganic carbon vs total particulate nitrogen ratio *PIC/TPNMüller, Marius N *Calculated *Duplicate II
20Particulate inorganic carbon/particulate organic carbon ratio *PIC/POC ratioMüller, Marius N *Calculated *Duplicate I
21Particulate inorganic carbon/particulate organic carbon ratio *PIC/POC ratioMüller, Marius N *Calculated *Duplicate II
22Carbonate system computation flag *CSC flagNisumaa, Anne-Marin *Calculated using seacarb after Nisumaa et al. (2010) *
23Carbon dioxide *CO2µmol/kgNisumaa, Anne-Marin *Calculated using seacarb after Nisumaa et al. (2010) *
24Fugacity of carbon dioxide (water) at sea surface temperature (wet air) *fCO2water_SST_wetµatmNisumaa, Anne-Marin *Calculated using seacarb after Nisumaa et al. (2010) *
25Bicarbonate ion *[HCO3]-µmol/kgNisumaa, Anne-Marin *Calculated using seacarb after Nisumaa et al. (2010) *
26Carbonate ion *[CO3]2-µmol/kgNisumaa, Anne-Marin *Calculated using seacarb after Nisumaa et al. (2010) *
27Carbon, inorganic, dissolved *DICµmol/kgNisumaa, Anne-Marin *Calculated using seacarb after Nisumaa et al. (2010) *
28Alkalinity, total *ATµmol/kgNisumaa, Anne-Marin *Calculated using seacarb after Nisumaa et al. (2010) *
29Aragonite saturation state *Omega ArgNisumaa, Anne-Marin *Calculated using seacarb after Nisumaa et al. (2010) *
30Calcite saturation state *Omega CalNisumaa, Anne-Marin *Calculated using seacarb after Nisumaa et al. (2010) *
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