Seawater carbonate chemistry and photo-physiological fitness, growth and carbon production of the Antarctic cryptophyte Geminigera cryophila ...

• Main Authors: Trimborn, Scarlett, Thoms, Silke, Karitter, Pascal, Bischof, Kai
• Format: Dataset
• Language: English
• Published: PANGAEA 2020
• Subjects: Biomass/Abundance/Elemental composition; Bottles or small containers/Aquaria <20 L; Chromista; Cryptophyta; Geminigera cryophila; Growth/Morphology; Laboratory experiment; Laboratory strains; Light; Not applicable; Pelagos; Phytoplankton; Primary production/Photosynthesis; Single species; Type; Species; Registration number of species; Uniform resource locator/link to reference; Irradiance; Partial pressure of carbon dioxide water at sea surface temperature wet air; Growth rate; Growth rate, standard deviation; Carbon, organic, particulate, per cell; Carbon, organic, particulate, standard deviation; Carbon, organic, particulate, production per cell; Particulate organic carbon, production, standard deviation; Nitrogen, organic, particulate, per cell; Nitrogen, organic, particulate, per cell, standard deviation; Production of particulate organic nitrogen; Particulate organic nitrogen production, standard deviation; Carbon/Nitrogen ratio; Carbon/Nitrogen ratio, standard deviation; Maximum photochemical quantum yield of photosystem II; Maximum photochemical quantum yield of photosystem II, standard deviation; Recovery; Recovery, standard deviation; Functional photosystem II reaction centers, per cell; Functional photosystem II reaction centers, standard deviation; Connectivity between photosystem II; Connectivity between photosystem II, standard deviation; Functional absorption cross sections of photosystem II reaction centers; Functional absorption cross sections of photosystem II reaction centers, standard deviation; Re-oxidation time of the Qa acceptor; Re-oxidation time of the Qa acceptor, standard deviation; Electron transport rate, absolute; Electron transport rate, absolute, standard deviation; Non photochemical quenching; Non photochemical quenching, standard deviation; Temperature, water; Salinity; Antarctic; The Antarctic; Antarc*; Ocean acidification
• Online Access: https://dx.doi.org/10.1594/pangaea.914289; https://doi.pangaea.de/10.1594/PANGAEA.914289

Ecophysiological studies on Antarctic cryptophytes to assess whether climatic changes such as ocean acidification and enhanced stratification affect their growth in Antarctic coastal waters in the future are lacking so far. This is the first study that investigates the combined effects of the increasing availability of pCO2 (400 and 1000 μatm) and irradiance (20, 200 and 500 μmol photons m-2 s-1) on growth, elemental composition and photo-physiology of the Antarctic cryptophyte Geminigera cryophila. Under ambient pCO2, this species was characterized by a pronounced sensitivity to increasing irradiance with complete growth inhibition at the highest light intensity. Interestingly, when grown under high pCO2 this negative light effect vanished, and it reached the highest rates of growth and particulate organic carbon production at the highest irradiance compared to the other tested experimental conditions. Our results for G. cryophila reveal beneficial effects of ocean acidification in conjunction with enhanced ... : In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Gattuso et al, 2019) 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 2020-03-18. ...