Alleviation of solar ultraviolet radiation (UVR)-induced photoinhibition in diatom Chaetoceros curvisetus by ocean acidification, supplement to: Chen, Heng; Guan, WanChun; Zeng, Guoquan; Li, Ping; Chen, Shaobo (2014): Alleviation of solar ultraviolet radiation (UVR)-induced photoinhibition in diatom Chaetoceros curvisetus by ocean acidification. Journal of the Marine Biological Association of the United Kingdom, 95(04), 661-667

• Main Authors: Chen, Heng, Guan, WanChun, Zeng, Guoquan, Li, Ping, Chen, Shaobo
• Format: Dataset
• Language: English
• Published: PANGAEA - Data Publisher for Earth & Environmental Science 2015
• Subjects: Biomass/Abundance/Elemental composition; Bottles or small containers/Aquaria <20 L; Chaetoceros curvisetus; Chromista; Growth/Morphology; Laboratory experiment; Laboratory strains; Light; North Pacific; Ochrophyta; Pelagos; Phytoplankton; Primary production/Photosynthesis; Single species; Species; Table; Figure; Treatment; Incubation duration; pH; pH, standard deviation; Cell density; Cell density, standard deviation; Chlorophyll a per cell; Chlorophyll a, standard deviation; Growth rate; Growth rate, standard deviation; Time in minutes; Photochemical efficiency; Photochemical efficiency, standard deviation; Ultraviolet radiation-induced inhibition of effective photochemical quantum yield; Ultraviolet radiation-induced inhibition of effective photochemical quantum yield, standard deviation; Irradiance; Electron transport rate, relative; Electron transport rate, relative, standard deviation; Ratio; Ratio, standard deviation; Initial slope of rapid light curve; Initial slope of rapid light curve, standard deviation; Maximal electron transport rate, relative; Maximal electron transport rate, relative, standard deviation; Light saturation; Light saturation, standard deviation; Temperature, water; Salinity; Carbon, inorganic, dissolved; Carbon, inorganic, dissolved, standard deviation; Bicarbonate ion; Bicarbonate ion, standard deviation; Carbonate ion; Carbonate ion, standard deviation; Carbon dioxide; Carbon dioxide, standard deviation; Carbonate system computation flag; Fugacity of carbon dioxide water at sea surface temperature wet air; Partial pressure of carbon dioxide water at sea surface temperature wet air; Aragonite saturation state; Calcite saturation state; Calculated using seacarb after Nisumaa et al. 2010; Ocean Acidification International Coordination Centre OA-ICC; Pacific; Ocean acidification
• Online Access: https://dx.doi.org/10.1594/pangaea.849257; https://doi.pangaea.de/10.1594/PANGAEA.849257

The study aimed to unravel the interaction between ocean acidification and solar ultraviolet radiation (UVR) in Chaetoceros curvisetus. Chaetoceros curvisetus cells were acclimated to high CO2 (HC, 1000 ppmv) and low CO2 concentration (control, LC, 380 ppmv) for 14 days. Cell density, specific growth rate and chlorophyll were measured. The acclimated cells were then exposed to PAB (photosynthetically active radiation (PAR) + UV-A + UV-B), PA (PAR + UV-A) or P (PAR) for 60 min. Photochemical efficiency (phi PSII), relative electron transport rate (rETR) and the recovery of PHPSII were determined. HC induced higher cell density and specific growth rate compared with LC. However, no difference was found in chlorophyll between HC and LC. Moreover, phi PSII and rETRs were higher under HC than LC in response to solar UVR. P exposure led to faster recovery of phi PSII, both under HC and LC, than PA and PAB exposure. It appeared that harmful effects of UVR on C. curvisetus could be counteracted by ocean acidification simulated by high CO2 when the effect of climate change is not beyond the tolerance of cells. : 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 2015-09-09.