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 2016
• Subjects: Experimental treatment; Carbon dioxide, partial pressure; Radiation, photosynthetically active; Temperature, water; LightDark cycle; Growth rate; Growth rate, standard deviation; Electron transport rate, relative; 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; Biological Impacts of Ocean Acidification BIOACID; Ocean acidification
• Online Access: https://dx.doi.org/10.1594/pangaea.861157; https://doi.pangaea.de/10.1594/PANGAEA.861157

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 ... : Supplement to: Zhang, Yong; Bach, Lennart Thomas; Schulz, Kai Georg; Riebesell, Ulf (2015): The modulating effect of light intensity on the response of the coccolithophore Gephyrocapsa oceanica to ocean acidification. Limnology and Oceanography, 60(6), 2145-2157 ...