Effects of high CO2 levels on the ecophysiology of the diatom Thalassiosira weissflogii differ depending on the iron nutritional status ...

• Main Authors: Sugie, Koji, Yoshimura, T
• Format: Dataset
• Language: English
• Published: PANGAEA 2016
• Subjects: Biomass/Abundance/Elemental composition; Bottles or small containers/Aquaria <20 L; Chromista; Growth/Morphology; Laboratory experiment; Laboratory strains; Micro-nutrients; North Pacific; Ochrophyta; Pelagos; Phytoplankton; Primary production/Photosynthesis; Single species; Thalassiosira weissflogii; Type; Species; Registration number of species; Uniform resource locator/link to reference; Treatment; Iron, dissolved, inorganic; Growth rate; Time in days; Alkalinity, total; Carbon, inorganic, dissolved; Cell density; Cell biovolume; Surface area; Carbon, organic, particulate; Nitrogen, particulate; Phosphorus, particulate; Biogenic silica; Chlorophyll a; Carbon, organic, particulate, per cell; Nitrogen, particulate, per cell; Phosphorus, organic, particulate, per cell; Biogenic silica, per cell; Chlorophyll a per cell; Carbon, intracellular; Nitrogen, intracellular; Phosphorus, intracellular; Silicon per surface area; Chlorophyll a, intracellular; Carbon, organic, particulate, production per cell; Net nitrogen production rate; Net phosphorus production; Net silicon production; Chlorophyll a production per cell; Carbon/Nitrogen ratio; Carbon/Phosphorus ratio; Nitrogen/Phosphorus ratio; Pacific; Ocean acidification
• Online Access: https://dx.doi.org/10.1594/pangaea.859316; https://doi.pangaea.de/10.1594/PANGAEA.859316

Iron availability in seawater, namely the concentration of dissolved inorganic iron ([Fe']), is affected by changes in pH. Such changes in the availability of iron should be taken into account when investigating the effects of ocean acidification on phytoplankton ecophysiology because iron plays a key role in phytoplankton metabolism. However, changes in iron availability in response to changes in ocean acidity are difficult to quantify specifically using natural seawater because these factors change simultaneously. In the present study, the availability of iron and carbonate chemistry were manipulated individually and simultaneously in the laboratory to examine the effect of each factor on phytoplankton ecophysiology. The effects of various pCO2 conditions (390, 600, and 800 µatm) on the growth, cell size, and elemental stoichiometry (carbon [C], nitrogen [N], phosphorus [P], and silicon [Si]) of the diatom Thalassiosira weissflogii under high iron ([Fe'] = 240 pmol/l) and low iron ([Fe'] = 24 pmol/l) ... : In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Gattuso et al, 2015) 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 is 2016-04-01. ...