Growth and photosynthesis of a diatom Cylindrotheca closterium grown under elevated CO2 in the presence of solar UV radiation ...

• Main Authors: Wu, Xiaojuan, Gao, Guang, Giordano, Mario, Gao, Kunshan
• Format: Dataset
• Language: English
• Published: PANGAEA 2012
• Subjects: Bottles or small containers/Aquaria <20 L; Chromista; Cylindrotheca closterium; Growth/Morphology; Laboratory experiment; Laboratory strains; Light; Myzozoa; North Pacific; Ochrophyta; Pelagos; Phytoplankton; Primary production/Photosynthesis; Single species; Species; Identification; Treatment; Incubation duration; Time of day; Radiation, photosynthetically active, dose daily; Ultraviolet-a radiation, dose daily; Ultraviolet-b radiation, dose daily; Growth rate; Growth rate, standard deviation; Cell density; Cell density, standard deviation; Effective quantum yield; Maximal electron transport rate, relative; Initial slope of rapid light curve; Light saturation; Maximum potential capacity of photosynthesis; Maximum potential capacity of photosynthesis, standard deviation; Carbon, inorganic, dissolved, reciprocal of photosynthetic affinity value; Carbon, inorganic, dissolved, reciprocal of photosynthetic affinity value, standard deviation; Carbon dioxide, reciprocal of photosynthetic affinity value; Carbon dioxide, reciprocal of photosynthetic affinity value, standard deviation; Bicarbonate ion, reciprocal of photosynthetic affinity value; Bicarbonate ion, reciprocal of photosynthetic affinity value, standard deviation; Linear slope, photosynthesis/dissolved organic carbon curve; Linear slope, photosynthesis/dissolved organic carbon curve, standard deviation; Partial pressure of carbon dioxide water at sea surface temperature wet air; pH; pH, standard deviation; Carbon, inorganic, dissolved; Carbon, inorganic, dissolved, standard deviation; Bicarbonate ion; Bicarbonate ion, standard deviation; Carbonate ion; Carbonate ion, standard deviation; Alkalinity, total; Ocean acidification
• Online Access: https://dx.doi.org/10.1594/pangaea.821994; https://doi.pangaea.de/10.1594/PANGAEA.821994

The combination of elevated CO2 and the increased acidity in surface oceans is likely to have an impact on photosynthesis via its effects on inorganic carbon speciation and on the overall energetics of phytoplankton. Exposure to UV radiation (UVR) may also have a role in the response to elevated CO2 and acidification, due to the fact that UVR may variously impact on photosynthesis and because of the energy demand of UVR defense. The cell may gain energy by down-regulating the CO2 concentrating mechanism, which may lead to a greater ability to cope with UVR and/or higher growth rates. In order to clarify the interplay of cell responses to increasing CO2 and UVR, we investigated the photosynthetic response of the marine and estuarine diatom Cylindrotheca closterium f. minutissima cultured at either 390 (ambient) or 800 (elevated) ppmv CO2, while exposed to solar radiation with or without UVR (UVR, 280-400 nm). After a 6 day acclimation period, the growth rate of cells was little affected by elevated CO2 and no ... : In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Lavigne and Gattuso, 2011) 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 by seacarb is 2013-11-08. ...