Seawater carbonate chemistry and growth, production rates, and elemental quotas of Thalassiosira hyalina

• Main Authors: Wolf, Klara K E, Hoppe, Clara Jule Marie, Rost, Björn
• Format: Dataset
• Language: English
• Published: PANGAEA - Data Publisher for Earth & Environmental Science 2018
• Subjects: Arctic; Biomass/Abundance/Elemental composition; Bottles or small containers/Aquaria <20 L; Chromista; Coast and continental shelf; Community composition and diversity; Entire community; Growth/Morphology; Laboratory experiment; Light; Ochrophyta; Pelagos; Phytoplankton; Polar; Primary production/Photosynthesis; Single species; Temperature; Thalassiosira hyalina; Type; Species; Registration number of species; Uniform resource locator/link to reference; Strain; Temperature, water; 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; Chlorophyll a per cell; Chlorophyll a, standard deviation; Biogenic silica, per cell; Biogenic silica, standard deviation; Carbon/Nitrogen ratio; Carbon/Nitrogen ratio, standard deviation; Partial pressure of carbon dioxide, standard deviation; pH; pH, standard deviation; Alkalinity, total; Alkalinity, total, standard deviation; Carbon, inorganic, dissolved; Carbon, inorganic, dissolved, standard deviation; Salinity; Treatment; Diatoms; Diatoms, standard deviation; Percentage; Percentage, standard deviation; Carbonate system computation flag; Carbon dioxide; Carbon dioxide, standard deviation; Fugacity of carbon dioxide water at sea surface temperature wet air; Fugacity of carbon dioxide in seawater, standard deviation; Bicarbonate ion; Bicarbonate ion, standard deviation; Carbonate ion; Carbonate ion, standard deviation; Aragonite saturation state; Aragonite saturation state, standard deviation; Calcite saturation state; Calcite saturation state, standard deviation; Experiment; Calculated using CO2SYS; Potentiometric; Potentiometric titration; Colorimetric; Calculated using seacarb after Nisumaa et al. 2010; Calculated using seacarb after Orr et al. 2018; Ocean Acidification International Coordination Centre OA-ICC; Ocean acidification
• Online Access: https://dx.doi.org/10.1594/pangaea.923884; https://doi.pangaea.de/10.1594/PANGAEA.923884

The potential for adaptation of phytoplankton to future climate is often extrapolated based on single strain responses of a representative species, ignoring variability within and between species. The aim of this study was to approximate the range of strain-specific reaction patterns within an Arctic diatom population, which selection can act upon. In a laboratory experiment, we first incubated natural communities from an Arctic fjord under present and future conditions. In a second step, single strains of the diatom Thalassiosira hyalina were isolated from these selection environments and exposed to a matrix of temperature (3°C and 6°C) and pCO2 levels (180 μatm, 370 μatm, 1000 μatm, 1400 μatm) to establish reaction norms for growth, production rates, and elemental quotas. The results revealed interactive effects of temperature and pCO2 as well as wide tolerance ranges. Between strains, however, sensitivities and optima differed greatly. These strain-specific responses corresponded well with their respective selection environments of the previous community incubation. We therefore hypothesize that intraspecific variability and the selection between coexisting strains may pose an underestimated source of species' plasticity. Thus, adaptation of phytoplankton assemblages may also occur by selection within rather than only between species, and species-wide inferences from single strain experiments should be treated with caution. : 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 2020-10-14.