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Main Authors: Fiorini, Sarah, Pedrotti, Maria Luiza, Middelburg, Jack J, Gattuso, Jean-Pierre, Kerros, Marie-Emmanuelle
Format: Dataset Open Access
Language:en
Published: PANGAEA 2011
Subjects:
Alkalinity, Gran titration (Gran, 1950); Alkalinity, total; Aragonite saturation state; Bicarbonate ion; Biomass/Abundance/Elemental composition; Bottles or small containers/Aquaria (<20 L); Calcidiscus leptoporus; Calcification/Dissolution; Calcite saturation state; Calculated; Calculated, see reference(s); Calculated using seacarb; Calculated using seacarb after Nisumaa et al. (2010); Carbon, inorganic, dissolved; Carbon, inorganic, particulate, per cell; Carbon, organic, particulate; Carbon, organic, particulate, per cell; Carbon, total, particulate; Carbon, total, particulate, per cell; Carbon, total, particulate, production per cell; Carbonate ion; Carbonate system computation flag; Carbon dioxide; Chromista; Coulter Counter (Beckman Coulter); Emiliania huxleyi; EPOCA; EUR-OCEANS; European network of excellence for Ocean Ecosystems Analysis; European Project on Ocean Acidification; Experimental treatment; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Growth/Morphology; Growth rate; Haptophyta; Laboratory experiment; Laboratory strains; Light:Dark cycle; Mass spectrometer Thermo Electron Flash EA 1122 Analyzer; Measured; Mediterranean Sea; Nitrogen; Nitrogen, total; Nitrogen per cell; OA-ICC; Ocean acidification; Ocean Acidification International Coordination Centre; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); Pelagos; pH, total scale; pH meter (Metrohm electrodes); Phytoplankton; Primary production/Photosynthesis; Radiation, photosynthetically active; Salinity; Sample ID; Single species; Skalar AutoAnalyser; Species; Suspended particulate matter; Syracosphaera pulchra; Temperature; Temperature, water; Transparent exopolymer particles; Transparent exopolymer particles per cell
Online Access:https://doi.org/10.1594/PANGAEA.770055
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Table of Contents:
  • The response of three coccolithophores (Emiliania huxleyi, Calcidiscus leptoporus and Syracosphaera pulchra) to elevated partial pressure (pCO2) of carbon dioxide was investigated in batch cultures. For the first time, we also report on the response of the non calcifying (haploid) life stage of these three species. The growth rate, cell size, inorganic (PIC) and organic carbon (POC) of both life stages were measured at two different pCO2 (400and 760 ppm) and their organic and inorganic carbon production calculated. The two lifestages within the same species generally exhibited a similar response to elevated pCO2, theresponse of the haploid stage being often more pronounced than that of the diploid stage. Thegrowth rate was consistently higher at higher pCO2 but the response of other processes varied among species. The calcification rate of C. leptoporus and of S. pulchra did not change at elevated pCO2 while increased in E. huxleyi. The POC production as well as the cell size of both life stages of S. pulchra and of the haploid stage of E. huxleyi markedly decreased at elevated pCO2. It remained unaltered in the diploid stage of E. huxleyi and C. leptoporus and increased in the haploid stage of the latter. The PIC:POC ratio increased in E. huxleyi and was constant in C. leptoporus and S. pulchra. These results suggest that the non-calcifying stage, is more responsive than the calcifying stage and that the most versatile genera will proliferate in a more acidic ocean rather than all coccolithophores will decline.

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