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  • Alkalinity, total; Alkalinity, total, standard deviation; Aragonite saturation state; Bicarbonate ion; Bottles or small containers/Aquaria (〈20 L); Calcification/Dissolution; Calcification rate, standard deviation; Calcification rate of carbon per cell; Calcite saturation state; Calculated using seacarb after Nisumaa et al. (2010); Carbon, inorganic, dissolved; Carbonate ion; Carbonate system computation flag; Carbon dioxide; Cell size; Cell size, standard deviation; Chromista; Effective photochemical quantum yield; Effective photochemical quantum yield, standard deviation; Electron transport rate, relative; Electron transport rate, relative, standard deviation; Emiliania huxleyi; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Growth/Morphology; Growth rate; Growth rate, standard deviation; Haptophyta; Irradiance; Laboratory experiment; Laboratory strains; Maximum photochemical quantum yield of photosystem II; Maximum photochemical quantum yield of photosystem II, standard deviation; Net photosynthesis rate, per cell; Net photosynthesis rate, standard deviation; Not applicable; OA-ICC; Ocean Acidification International Coordination Centre; Other; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); Pelagos; pH; pH, standard deviation; Photosynthesis rate, carbon, per cell; Phytoplankton; Primary production/Photosynthesis; Registration number of species; Salinity; Single species; Species; Temperature, water; Time in hours; Treatment; Type; Uniform resource locator/link to reference  (1)
  • Alkalinity, total; Aragonite saturation state; Bicarbonate ion; Bottles or small containers/Aquaria (〈20 L); Calcite saturation state; Calculated using CO2SYS; Calculated using seacarb after Nisumaa et al. (2010); Carbon, inorganic, dissolved; Carbon, inorganic, dissolved, intracellular pool; Carbonate ion; Carbonate system computation flag; Carbon dioxide; Chromista; Cumulative carbon fixation per cell; Effective quantum yield; Factor; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Growth/Morphology; Growth rate; Identification; Initial slope of photosynthesis/dissolved inorganic carbon; Laboratory experiment; Laboratory strains; Light; Light capturing capacity; Light saturated maximum photosynthetic rate per cell; Light saturation point; Maximal electron transport rate, relative; Maximum photochemical quantum yield of photosystem II; Not applicable; OA-ICC; Ocean Acidification International Coordination Centre; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); Pelagos; pH; Phaeodactylum tricornutum; Phytoplankton; Primary production/Photosynthesis; Registration number of species; Salinity; Single species; Species; Temperature, water; Time in seconds; Treatment; Type; Uniform resource locator/link to reference  (1)
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  • 1
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    Unknown
    Seawater carbonate chemistry and growth, photosynthetic and calcification rates of a coastal strain of Emiliania huxleyi (2021)
    PANGAEA
    Details
    Publication Date: 2024-03-15
    Description: The carbonate chemistry in coastal waters is more variable compared with that of open oceans, both in magnitude and time scale of its fluctuations. However, knowledge of the responses of coastal phytoplankton to dynamic changes in pH/pCO2 has been scarcely documented. Hence, we investigated the physiological performance of a coastal isolate of the coccolithophore Emiliania huxleyi (PML B92/11) under fluctuating and stable pCO2 regimes (steady ambient pCO2, 400 μatm; steady elevated pCO2, 1200 μatm; diurnally fluctuating elevated pCO2, 600–1800 μatm). Elevated pCO2 inhibited the calcification rate in both the steady and fluctuating regimes. However, higher specific growth rates and lower ratios of calcification to photosynthesis were detected in the cells grown under diurnally fluctuating elevated pCO2 conditions. The fluctuating pCO2 regime alleviated the negative effects of elevated pCO2 on effective photochemical quantum yield and relative photosynthetic electron transport rate compared with the steady elevated pCO2 treatment. Our results suggest that growth of E. huxleyi could benefit from diel fluctuations of pH/pCO2 under future-projected ocean acidification, but its calcification was reduced by the fluctuation and the increased concentration of CO2, reflecting a necessity to consider the influences of dynamic pH fluctuations on coastal carbon cycles associated with ocean global changes.
    Keywords: Alkalinity, total; Alkalinity, total, standard deviation; Aragonite saturation state; Bicarbonate ion; Bottles or small containers/Aquaria (〈20 L); Calcification/Dissolution; Calcification rate, standard deviation; Calcification rate of carbon per cell; Calcite saturation state; Calculated using seacarb after Nisumaa et al. (2010); Carbon, inorganic, dissolved; Carbonate ion; Carbonate system computation flag; Carbon dioxide; Cell size; Cell size, standard deviation; Chromista; Effective photochemical quantum yield; Effective photochemical quantum yield, standard deviation; Electron transport rate, relative; Electron transport rate, relative, standard deviation; Emiliania huxleyi; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Growth/Morphology; Growth rate; Growth rate, standard deviation; Haptophyta; Irradiance; Laboratory experiment; Laboratory strains; Maximum photochemical quantum yield of photosystem II; Maximum photochemical quantum yield of photosystem II, standard deviation; Net photosynthesis rate, per cell; Net photosynthesis rate, standard deviation; Not applicable; OA-ICC; Ocean Acidification International Coordination Centre; Other; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); Pelagos; pH; pH, standard deviation; Photosynthesis rate, carbon, per cell; Phytoplankton; Primary production/Photosynthesis; Registration number of species; Salinity; Single species; Species; Temperature, water; Time in hours; Treatment; Type; Uniform resource locator/link to reference
    Type: Dataset
    Format: text/tab-separated-values, 2758 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 2
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    Seawater carbonate chemistry and growth and chlorophyll, photochemical parameters, carbon fixation of diatom Phaeodactylum tricornutum (2017)
    PANGAEA
    In:  Supplement to: Liu, Nana; Beardall, John; Gao, Kunshan (2017): Elevated CO2 and associated seawater chemistry do not benefit a model diatom grown with increased availability of light. Aquatic Microbial Ecology, 79(2), 137-147, https://doi.org/10.3354/ame01820
    Details
    Publication Date: 2024-03-15
    Description: Elevated CO2 is leading to a decrease in pH in marine environments (ocean acidification [OA]), altering marine carbonate chemistry. OA can influence the metabolism of many marine organisms; however, no consensus has been reached on its effects on algal photosynthetic carbon fixation and primary production. Here, we found that when the diatom Phaeodactylum tricornutum was grown under different pCO2 levels, it showed different responses to elevated pCO2 levels under growth-limiting (20 µmol photons/m**2/s, LL) compared with growth-saturating (200 µmol photons/m**2/s, HL) light levels. With pCO2 increased up to 950 µatm, growth rates and primary productivity increased, but in the HL cells, these parameters decreased significantly at higher concentrations up to 5000 µatm, while no difference in growth was observed with pCO2 for the LL cells. Elevated CO2 concentrations reduced the size of the intracellular dissolved inorganic carbon (DIC) pool by 81% and 60% under the LL and HL levels, respectively, with the corresponding photosynthetic affinity for DIC decreasing by 48% and 55%. Little photoinhibition was observed across all treatments. These results suggest that the decreased growth rates under higher CO2 levels in the HL cells were most likely due to acid stress. Low energy demand of growth and energy saving from the down-regulation of the CO2 concentrating mechanisms (CCM) minimized the effects of acid stress on the growth of the LL cells. These findings imply that OA treatment, except for down-regulating CCM, caused stress on the diatom, reflected in diminished C assimilation and growth rates.
    Keywords: Alkalinity, total; Aragonite saturation state; Bicarbonate ion; Bottles or small containers/Aquaria (〈20 L); Calcite saturation state; Calculated using CO2SYS; Calculated using seacarb after Nisumaa et al. (2010); Carbon, inorganic, dissolved; Carbon, inorganic, dissolved, intracellular pool; Carbonate ion; Carbonate system computation flag; Carbon dioxide; Chromista; Cumulative carbon fixation per cell; Effective quantum yield; Factor; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Growth/Morphology; Growth rate; Identification; Initial slope of photosynthesis/dissolved inorganic carbon; Laboratory experiment; Laboratory strains; Light; Light capturing capacity; Light saturated maximum photosynthetic rate per cell; Light saturation point; Maximal electron transport rate, relative; Maximum photochemical quantum yield of photosystem II; Not applicable; OA-ICC; Ocean Acidification International Coordination Centre; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); Pelagos; pH; Phaeodactylum tricornutum; Phytoplankton; Primary production/Photosynthesis; Registration number of species; Salinity; Single species; Species; Temperature, water; Time in seconds; Treatment; Type; Uniform resource locator/link to reference
    Type: Dataset
    Format: text/tab-separated-values, 6177 data points
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    DATA PANGAEA
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