TY - DATA ID - mller2010scca T1 - Seawater carbonate chemistry and processes during experiments with Emiliania huxleyi (2005 Bergen) and Coccolithus braarudii (RCC 1200), 2010 AU - Müller, Marius N AU - Schulz, Kai Georg AU - Riebesell, Ulf PY - 2010/08/26/ T2 - Supplement to: Müller, MN et al. (2010): Effects of long-term high CO2 exposure on two species of coccolithophores. Biogeosciences, 7(3), 1109-1116, https://doi.org/10.5194/bg-7-1109-2010 PB - PANGAEA DO - 10.1594/PANGAEA.744738 UR - https://doi.org/10.1594/PANGAEA.744738 N2 - 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. KW - Biomass/Abundance/Elemental composition KW - Bottles or small containers/Aquaria (<20 L) KW - Chromista KW - Coccolithus braarudii KW - Emiliania huxleyi KW - Growth/Morphology KW - Haptophyta KW - Laboratory experiment KW - Laboratory strains KW - Not applicable KW - Pelagos KW - Phytoplankton KW - Single species ER -