Comparative responses of two dominant Antarctic phytoplankton taxa to interactions between ocean acidification, warming, irradiance, and iron availability ...

• Main Authors: Xu, Kai, Fu, Feixue, Hutchins, David A
• Format: Dataset
• Language: English
• Published: PANGAEA 2014
• Subjects: Antarctic; Biomass/Abundance/Elemental composition; Bottles or small containers/Aquaria <20 L; Chromista; Fragilariopsis cylindrus; Growth/Morphology; Haptophyta; Laboratory experiment; Laboratory strains; Light; Micro-nutrients; Ochrophyta; Pelagos; Phaeocystis antarctica; Phytoplankton; Primary production/Photosynthesis; Species interaction; Temperature; Species; Treatment; Growth rate; Growth rate, standard deviation; Chlorophyll a per cell; Chlorophyll a, standard deviation; Carbon/Nitrogen ratio; Carbon/Nitrogen ratio, standard deviation; Nitrogen/Phosphorus ratio; Nitrogen/Phosphorus ratio, standard deviation; Carbon/Phosphorus ratio; Carbon/Phosphorus ratio, standard deviation; Silicon/Carbon, molar ratio; Silicon/Carbon ratio, standard deviation; Silicon/Nitrogen, molar ratio; Silicon/Nitrogen ratio, standard deviation; Silicon/Phosphorus ratio; Silicon/Phosphorus ratio, standard deviation; Iron uptake rate, per cell; Iron uptake rate, standard deviation; Iron/Carbon uptake ratio; Iron/Carbon uptake ratio, standard deviation; Cell counts, percent of total; Cell counts, standard deviation; Cell density per colony; Cell density, standard deviation; Diameter; Height; Cell biovolume; Duration, number of days; Abundance; Abundance, standard deviation; Antarc*; Antarctica; Ocean acidification
• Online Access: https://dx.doi.org/10.1594/pangaea.840328; https://doi.pangaea.de/10.1594/PANGAEA.840328

We investigated the responses of the ecologically dominant Antarctic phytoplankton species Phaeocystis antarctica (a prymnesiophyte) and Fragilariopsis cylindrus (a diatom) to a clustered matrix of three global change variables (CO2, mixed-layer depth, and temperature) under both iron (Fe)-replete and Fe-limited conditions based roughly on the Intergovernmental Panel on Climate Change (IPCC) A2 scenario: (1) Current conditions, 39 Pa (380 ppmv) CO2, 50 µmol photons/m**2/s light, and 2°C; (2) Year 2060, 61 Pa (600 ppmv) CO2, 100 µmol photons/m**2/s light, and 4°C; (3) Year 2100, 81 Pa (800 ppmv) CO2, 150 µmol photons/m**2/s light, and 6°C. The combined interactive effects of these global change variables and changing Fe availability on growth, primary production, and cell morphology are species specific. A competition experiment suggested that future conditions could lead to a shift away from P. antarctica and toward diatoms such as F. cylindrus. Along with decreases in diatom cell size and shifts from ... : In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Lavigne et al, 2014) 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 2014-12-04. ...