Seawater carbonate chemistry and photoinhibition of the Picophytoplankter Synechococcus ...

• Main Authors: Li, He, Beardall, John, Gao, Kunshan
• Format: Dataset
• Language: English
• Published: PANGAEA 2023
• Subjects: Bacteria; Biomass/Abundance/Elemental composition; Bottles or small containers/Aquaria <20 L; Cyanobacteria; Growth/Morphology; Laboratory experiment; Laboratory strains; Light; Not applicable; Pelagos; Phytoplankton; Primary production/Photosynthesis; Single species; Synechococcus sp.; Type of study; Species; Treatment; Replicate; Irradiance; Growth rate; Chlorophyll a per cell; Photosynthetic carbon fixation rate per cell; Photosynthetic carbon fixation rate, per chlorophyll a; Effective quantum yield; Photosynthetic quantum efficiency; Maximal electron transport rate, relative; Functional absorption cross sections of photosystem II reaction centers; Contribution; Ratio; Particulate organic carbon, per cell; Particulate organic nitrogen per cell; Carbon/Nitrogen ratio; Salinity; Temperature, water; Alkalinity, total; pH; Carbonate system computation flag; Carbon dioxide; Fugacity of carbon dioxide water at sea surface temperature wet air; Partial pressure of carbon dioxide water at sea surface temperature wet air; Bicarbonate ion; Carbonate ion; Carbon, inorganic, dissolved; Aragonite saturation state; Calcite saturation state; Calculated using seacarb after Nisumaa et al. 2010; Ocean Acidification International Coordination Centre OA-ICC; Ocean acidification
• Online Access: https://dx.doi.org/10.1594/pangaea.961006; https://doi.pangaea.de/10.1594/PANGAEA.961006

The marine picocyanobacterium Synechococcus accounts for a major fraction of the primary production across the global oceans. However, knowledge of the responses of Synechococcus to changing pCO2 and light levels has been scarcely documented. Hence, we grew Synechococcus sp. CB0101 at two CO2 concentrations (ambient CO2 AC:410 μatm; high CO2 HC:1000 μatm) under various light levels between 25 and 800 μmol photons m−2 s−1 for 10–20 generations and found that the growth of Synechococcus strain CB0101 is strongly influenced by light intensity, peaking at 250 μmol m−2 s−1 and thereafter declined at higher light levels. Synechococcus cells showed a range of acclimation in their photophysiological characteristics, including changes in pigment content, optical absorption cross section, and light harvesting efficiency. Elevated pCO2 inhibited the growth of cells at light intensities close to or greater than saturation, with inhibition being greater under high light. Elevated pCO2 also reduced photosynthetic carbon ... : In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Gattuso et al, 2022) 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 2023-07-19. ...