Seawater carbonate chemistry and growth,cellular composition and photophysiological parameters of Micromonas pusilla ...

• Main Authors: White, Emily, Hoppe, Clara Jule Marie, Rost, Björn
• Format: Dataset
• Language: English
• Published: PANGAEA 2019
• Subjects: Arctic; Biomass/Abundance/Elemental composition; Bottles or small containers/Aquaria <20 L; Chlorophyta; Coast and continental shelf; Growth/Morphology; Laboratory experiment; Light; Micromonas pusilla; Pelagos; Phytoplankton; Plantae; Polar; Primary production/Photosynthesis; Single species; Type; Species; Registration number of species; Uniform resource locator/link to reference; Treatment; Partial pressure of carbon dioxide water at sea surface temperature wet air; Growth rate; Division rate; Carbon, organic, particulate, production per cell; Carbon, organic, particulate, per cell; Nitrogen, organic, particulate, per cell; Chlorophyll a per cell; Carbon/Nitrogen ratio; Carbon, organic, particulate/chlorophyll a ratio; Index; Quantum yield efficiency of photosystem II; Photosystem II connectivity; Spectral irradiance, downward at 810 nm, standard deviation; Non photochemical quenching; Photosystem II re-opening rate; Electron transport rate, relative, maximum; Light saturation point; Maximum light use efficiency; Fluorescence, oxygen free radicals; Fluorescence, hydrogen peroxide; Temperature, water; Carbon, inorganic, dissolved; Carbon, inorganic, dissolved, standard deviation; Alkalinity, total; Alkalinity, total, standard deviation; pH; pH, standard deviation; Partial pressure of carbon dioxide, standard deviation; Carbonate system computation flag; Carbon dioxide; Arctic Ocean; Climate change; Ocean acidification
• Online Access: https://dx.doi.org/10.1594/pangaea.924887; https://doi.pangaea.de/10.1594/PANGAEA.924887

Compared to the rest of the globe, the Arctic Ocean is affected disproportionately by climate change. Despite these fast environmental changes, we currently know little about the effects of ocean acidification (OA) on marine key species in this area. Moreover, the existing studies typically test the effects of OA under constant, hence artificial, light fields. In this study, the abundant Arctic picoeukaryote Micromonas pusilla was acclimated to current (400 µatm) and future (1000 µatm) pCO2 levels under a constant as well as a dynamic light, simulating more realistic light fields as experienced in the upper mixed layer. To describe and understand the responses to these drivers, growth, particulate organic carbon (POC) production, elemental composition, photophysiology and reactive oxygen species (ROS) production were analysed. M. pusilla was able to benefit from OA on various scales, ranging from an increase in growth rates to enhanced photosynthetic capacity, irrespective of the light regime. These ... : In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Gattuso et al, 2020) 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 2020-11-11. ...