The modulating effect of light intensity on the response of the coccolithophore Gephyrocapsa oceanica to ocean acidification ...

• Main Authors: Zhang, Yong, Bach, Lennart Thomas, Schulz, Kai Georg, Riebesell, Ulf
• Format: Dataset
• Language: English
• Published: PANGAEA 2015
• Subjects: Bottles or small containers/Aquaria <20 L; Calcification/Dissolution; Chromista; Gephyrocapsa oceanica; Growth/Morphology; Haptophyta; Laboratory experiment; Laboratory strains; Light; North Atlantic; Pelagos; Phytoplankton; Primary production/Photosynthesis; Single species; Type; Species; Registration number of species; Uniform resource locator/link to reference; Carbon dioxide, partial pressure; Carbon dioxide, partial pressure, standard deviation; Light intensity; Growth rate; Growth rate, standard deviation; Maximal electron transport rate, relative; Maximal electron transport rate, relative, standard deviation; Initial slope of rapid light curve; Initial slope of rapid light curve, standard deviation; Light saturation point; Light saturation point, standard deviation; Carbon, organic, particulate, production per cell; Particulate organic carbon, production, standard deviation; Carbon, inorganic, particulate, production per cell; Particulate inorganic carbon, production, standard deviation; Particulate inorganic carbon/particulate organic carbon ratio; Particulate inorganic carbon/particulate organic carbon ratio, standard deviation; Carbon, organic, particulate/Nitrogen, organic, particulate ratio; Carbon, organic, particulate/Nitrogen, organic, particulate ratio, standard deviation; Alkalinity, total; Alkalinity, total, standard deviation; Carbon, inorganic, dissolved; Carbon, inorganic, dissolved, standard deviation; pH; pH, standard deviation; Bicarbonate ion; Bicarbonate ion, standard deviation; Carbonate ion; Carbonate ion, standard deviation; Carbon dioxide; Carbon dioxide, standard deviation; Calcite saturation state; Ocean acidification
• Online Access: https://dx.doi.org/10.1594/pangaea.867566; https://doi.pangaea.de/10.1594/PANGAEA.867566

Global change leads to a multitude of simultaneous modifications in the marine realm among which shoaling of the upper mixed layer, leading to enhanced surface layer light intensities, as well as increased carbon dioxide (CO2) concentration are some of the most critical environmental alterations for phytoplankton. In this study, we investigated the responses of growth, photosynthetic carbon fixation and calcification of the coccolithophore Gephyrocapsa oceanica to elevated inline image (51 Pa, 105 Pa, and 152 Pa) (1 Pa = 10 µatm) at a variety of light intensities (50-800 µmol photons/m**2/s). By fitting the light response curve, our results showed that rising inline image reduced the maximum rates for growth, photosynthetic carbon fixation and calcification. Increasing light intensity enhanced the sensitivity of these rate responses to inline image, and shifted the inline image optima toward lower levels. Combining the results of this and a previous study (Sett et al. 2014) on the same strain indicates that ... : In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Gattuso et al, 2015) 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 2016-11-03. ...