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Bibliographic Details
Main Authors: Casareto, Beatriz Estela, Niraula, Mohan P, Fujimura, Hiroyuki, Suzuki, Yoshimi
Format: Dataset Open Access
Language:en
Published: PANGAEA 2009
Subjects:
13C tracer technique according to Hama et al. (1993); Alkalinity, total; Alkalinity, total, standard deviation; Alkalinity anomaly technique (Smith and Key, 1975); Aragonite saturation state; Bacteria, biomass; Bacteria, biomass as carbon, standard deviation; Bicarbonate ion; Biomass/Abundance/Elemental composition; Bottles or small containers/Aquaria (<20 L); Calcification/Dissolution; Calcification rate, standard deviation; Calcification rate of calcium carbonate; Calcite saturation state; Calculated; Calculated using seacarb after Nisumaa et al. (2010); Carbon, inorganic, particulate; Carbon, organic, particulate; Carbon, organic, particulate/Nitrogen, organic, particulate ratio; Carbon, total; Carbonate ion; Carbonate system computation flag; Carbon dioxide; Chromista; Coccolithophoridae, biomass as carbon; Coccolithophoridae, biomass as carbon, standard deviation; Cyanobacteria, biomass as carbon; Cyanobacteria, biomass as carbon, standard deviation; Entire community; Experimental treatment; Experiment day; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Haptophyta; Laboratory experiment; Laboratory strains; Mass spectrometer Thermo Finnigan DELTA plus Advantage; Measured; Microscopy; Microzooplankton, biomass as carbon; Microzooplankton, biomass as carbon, standard deviation; Nitrate; Nitrogen, organic, particulate; Not applicable; OA-ICC; Ocean acidification; Ocean Acidification International Coordination Centre; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); Particulate inorganic carbon/particulate organic carbon ratio; Particulate inorganic carbon/particulate organic carbon ratio, standard deviation; Pelagos; pH, NBS scale; pH, standard deviation; pH, total scale; pH meter (Orion); Phosphate; Phytoplankton; Phytoplankton, other, noncalcifying, biomass as carbon; Phytoplankton, other, noncalcifying, biomass as carbon, standard deviation; Pico-/Nanoplankton, heterotrophic eukaryotic, biomass; Pico-/Nanoplankton, heterotrophic eukaryotic, biomass, standard deviation; Pleurochrysis carterae; Potentiometric titration (Radiometer TIM850); Primary production/Photosynthesis; Primary production of carbon; Salinity; Single species; Temperature, water; Time in hours
Online Access:https://doi.org/10.1594/PANGAEA.756687
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Table of Contents:
  • Production (abundance and biomass) and net calcification rates of the coccolithophorid Pleurochrysis carterae under different partial pressures of CO2 (pCO2) were examined using short (15, 24 and 39 h), long (7 d) and dark (7 d) incubation experiments. Short incubations were conducted at ambient, 500 and 820 ppm pCO2 levels in natural seawater that was enriched with nutrients and inoculated with P. carterae. Long incubations were conducted at ambient and 1200 ppm pCO2 levels in natural seawater (0.2 µm filtered as well as unfiltered) that was enriched with nutrients and inoculated with P. carterae. Dark incubations were conducted at ambient and 1200 ppm pCO2 in unfiltered seawater that was inoculated with P. carterae. The abundance and biomass of coccolithophorids increased with pCO2 and time. The abundance and biomass of most noncalcifying phytoplankton also increased, and were hardly affected by CO2 inputs. Net calcification rates were negative in short incubations during the pre-bloom phase regardless of pCO2 levels, indicating dissolution of calcium carbonate. Further, the negative values of net calcification in short incubations became less negative with time. Net calcification rates were positive in long incubations during blooms regardless of pCO2 level, and the rate of calcification increased with pCO2. Our results show that P. carterae may adapt to increased (~1200 ppm) pCO2 level with time, and such increase has little effect on the ecology of noncalcifying groups and hence in ecosystem dynamics. In dark incubations, net calcification rates were negative, with the magnitude being dependent on pCO2 levels.

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