Seawater carbonate chemistry and processes during experiments with coccolithophores (Emiliania huxleyi and Gephyrocapsa oceanica), 2000 ...

• Main Authors: Riebesell, Ulf, Zondervan, Ingrid, Rost, Björn, Tortell, Philippe Daniel, Zeebe, Richard E, Morel, Francois M M
• Format: Dataset
• Language: English
• Published: PANGAEA 2000
• Subjects: Biomass/Abundance/Elemental composition; Bottles or small containers/Aquaria <20 L; Calcification/Dissolution; Chromista; Entire community; Growth/Morphology; Haptophyta; Laboratory experiment; Laboratory strains; Light; Not applicable; Open ocean; Other studied parameter or process; Pelagos; Phytoplankton; Primary production/Photosynthesis; Single species; Temperate; Sample ID; Radiation, photosynthetically active; Temperature, water; Carbon dioxide, total; pH; Coccolithophoridae, total; Aphrodite aculeata; Phytoplankton cell division rate; Carbon dioxide, dissolved; Alkalinity, total; Partial pressure of carbon dioxide water at sea surface temperature wet air; Carbonate ion; Carbon, total, particulate; Carbon, total, particulate, production per cell; Carbon, organic, particulate, production per cell; Carbon, inorganic, particulate, production per cell; δ13C, total particulate carbon; δ13C, particulate organic carbon; δ13C, particulate inorganic carbon; δ13C, dissolved inorganic carbon; δ13C, carbon dioxide, aquatic; Isotopic fractionation, during photosynthis; Carbon/Nitrogen ratio; Experiment; CTD, Sea-Bird SBE 911plus; Scanning electron microscope SEM; Counting; Measured; Alkalinity, potentiometric; Calculated using seacarb after Nisumaa et al. 2010; Mass spectrometer Finnigan Delta-S; Calculated after Freeman & Hayes 1992; Ocean acidification
• Online Access: https://dx.doi.org/10.1594/pangaea.728092; https://doi.pangaea.de/10.1594/PANGAEA.728092

The formation of calcareous skeletons by marine planktonic organisms and their subsequent sinking to depth generates a continuous rain of calcium carbonate to the deep ocean and underlying sediments1. This is important in regulating marine carbon cycling and ocean-atmosphere CO2 exchange2. The present rise in atmospheric CO2 levels3 causes significant changes in surface ocean pH and carbonate chemistry4. Such changes have been shown to slow down calcification in corals and coralline macroalgae5,6, but the majority of marine calcification occurs in planktonic organisms. Here we report reduced calcite production at increased CO2 concentrations in monospecific cultures of two dominant marine calcifying phytoplankton species, the coccolithophorids Emiliania huxleyi and Gephyrocapsa oceanica . This was accompanied by an increased proportion of malformed coccoliths and incomplete coccospheres. Diminished calcification led to a reduction in the ratio of calcite precipitation to organic matter production. Similar ... : 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). ...