Comparative responses of two dominant Antarctic phytoplankton taxa to interactions between ocean acidification, warming, irradiance, and iron availability
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2014
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| _version_ | 1867170052372955136 |
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| author | Xu, Kai Fu, Feixue Hutchins, David A |
| author_facet | Xu, Kai Fu, Feixue Hutchins, David A |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | 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 prymnesiophyte colonies to single cells under the future scenario, this could potentially lead to decreased carbon export to the deep ocean. Fe : C uptake ratios of both species increased under future conditions, suggesting phytoplankton of the Southern Ocean will increase their Fe requirements relative to carbon fixation. The interactive effects of Fe, light, CO2, and temperature on Antarctic phytoplankton need to be considered when predicting the future responses of biology and biogeochemistry in this region. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_840328 |
| institution | PANGAEA |
| language | en |
| publishDate | 2014 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Comparative responses of two dominant Antarctic phytoplankton taxa to interactions between ocean acidification, warming, irradiance, and iron availability Xu, Kai Fu, Feixue Hutchins, David A Abundance; Abundance, standard deviation; Alkalinity, total; Antarctic; Aragonite saturation state; Bicarbonate ion; Biogenic silica, per cell; Biogenic silica, standard deviation; Biogenic silica production, standard deviation; Biogenic silica production per cell; Biomass/Abundance/Elemental composition; Bottles or small containers/Aquaria (<20 L); Calcite saturation state; Calculated using seacarb after Nisumaa et al. (2010); Carbon, inorganic, dissolved; Carbon, inorganic, dissolved, standard deviation; Carbon, organic, particulate, per cell; Carbon, organic, particulate, production, standard deviation; Carbon, organic, particulate, production per cell; Carbon, organic, particulate, standard deviation; Carbon/Nitrogen ratio; Carbon/Nitrogen ratio, standard deviation; Carbon/Phosphorus ratio; Carbon/Phosphorus ratio, standard deviation; Carbonate ion; Carbonate system computation flag; Carbon dioxide; Cell biovolume; Cell counts, percent of total; Cell counts, standard deviation; Cell density, standard deviation; Cell density per colony; Chlorophyll a, standard deviation; Chlorophyll a per cell; Chromista; Coulometric titration; Diameter; Duration, number of days; Fragilariopsis cylindrus; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Growth/Morphology; Growth rate; Growth rate, standard deviation; Haptophyta; Height; Iron/Carbon uptake ratio; Iron/Carbon uptake ratio, standard deviation; Iron uptake rate, per cell; Iron uptake rate, standard deviation; Laboratory experiment; Laboratory strains; Light; Measured; Micro-nutrients; Nitrogen, organic, particulate, per cell; Nitrogen, organic, particulate, production; Nitrogen, organic, particulate, production, standard deviation; Nitrogen, organic, particulate, standard deviation; Nitrogen/Phosphorus ratio; Nitrogen/Phosphorus ratio, standard deviation; OA-ICC; Ocean acidification; Ocean Acidification International Coordination Centre; Ochrophyta; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); Pelagos; pH, NBS scale; pH, standard deviation; pH, total scale; Phaeocystis antarctica; Phosphorus, organic, particulate, per cell; Phosphorus, organic, particulate, production, standard deviation; Phosphorus, organic, particulate, production per cell; Phosphorus, organic, particulate, standard deviation; Phytoplankton; Potentiometric; Primary production/Photosynthesis; Salinity; 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; Species; Species interaction; Temperature; Temperature, water; Treatment 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 prymnesiophyte colonies to single cells under the future scenario, this could potentially lead to decreased carbon export to the deep ocean. Fe : C uptake ratios of both species increased under future conditions, suggesting phytoplankton of the Southern Ocean will increase their Fe requirements relative to carbon fixation. The interactive effects of Fe, light, CO2, and temperature on Antarctic phytoplankton need to be considered when predicting the future responses of biology and biogeochemistry in this region. |
| title | Comparative responses of two dominant Antarctic phytoplankton taxa to interactions between ocean acidification, warming, irradiance, and iron availability |
| topic | Abundance; Abundance, standard deviation; Alkalinity, total; Antarctic; Aragonite saturation state; Bicarbonate ion; Biogenic silica, per cell; Biogenic silica, standard deviation; Biogenic silica production, standard deviation; Biogenic silica production per cell; Biomass/Abundance/Elemental composition; Bottles or small containers/Aquaria (<20 L); Calcite saturation state; Calculated using seacarb after Nisumaa et al. (2010); Carbon, inorganic, dissolved; Carbon, inorganic, dissolved, standard deviation; Carbon, organic, particulate, per cell; Carbon, organic, particulate, production, standard deviation; Carbon, organic, particulate, production per cell; Carbon, organic, particulate, standard deviation; Carbon/Nitrogen ratio; Carbon/Nitrogen ratio, standard deviation; Carbon/Phosphorus ratio; Carbon/Phosphorus ratio, standard deviation; Carbonate ion; Carbonate system computation flag; Carbon dioxide; Cell biovolume; Cell counts, percent of total; Cell counts, standard deviation; Cell density, standard deviation; Cell density per colony; Chlorophyll a, standard deviation; Chlorophyll a per cell; Chromista; Coulometric titration; Diameter; Duration, number of days; Fragilariopsis cylindrus; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Growth/Morphology; Growth rate; Growth rate, standard deviation; Haptophyta; Height; Iron/Carbon uptake ratio; Iron/Carbon uptake ratio, standard deviation; Iron uptake rate, per cell; Iron uptake rate, standard deviation; Laboratory experiment; Laboratory strains; Light; Measured; Micro-nutrients; Nitrogen, organic, particulate, per cell; Nitrogen, organic, particulate, production; Nitrogen, organic, particulate, production, standard deviation; Nitrogen, organic, particulate, standard deviation; Nitrogen/Phosphorus ratio; Nitrogen/Phosphorus ratio, standard deviation; OA-ICC; Ocean acidification; Ocean Acidification International Coordination Centre; Ochrophyta; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); Pelagos; pH, NBS scale; pH, standard deviation; pH, total scale; Phaeocystis antarctica; Phosphorus, organic, particulate, per cell; Phosphorus, organic, particulate, production, standard deviation; Phosphorus, organic, particulate, production per cell; Phosphorus, organic, particulate, standard deviation; Phytoplankton; Potentiometric; Primary production/Photosynthesis; Salinity; 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; Species; Species interaction; Temperature; Temperature, water; Treatment |
| url | https://doi.org/10.1594/PANGAEA.840328 |