scholarly journals Simulating the effects of light intensity and carbonate system composition on particulate organic and inorganic carbon production in Emiliania huxleyi

2015 ◽  
Vol 372 ◽  
pp. 192-204 ◽  
Author(s):  
Lena-Maria Holtz ◽  
Dieter Wolf-Gladrow ◽  
Silke Thoms
Keyword(s):  
Light Intensity ◽  
Inorganic Carbon ◽  
Emiliania Huxleyi ◽  
Carbonate System ◽  
Carbon Production ◽  
System Composition ◽  
Organic And Inorganic Carbon

scholarly journals The fate of pelagic CaCO<sub>3</sub> production in a high CO<sub>2</sub> ocean: A model study

2007 ◽  
Vol 4 (1) ◽  
pp. 533-560 ◽  
Author(s):  
M. Gehlen ◽  
R. Gangstø ◽  
B. Schneider ◽  
L. Bopp ◽  
O. Aumont ◽  
...  
Keyword(s):  
Calcium Carbonate ◽  
Inorganic Carbon ◽  
Emiliania Huxleyi ◽  
Atmospheric Co2 ◽  
Saturation State ◽  
Carbonate Production ◽  
Model Simulations ◽  
Carbon Production ◽  
Model Study ◽  
Organic And Inorganic Carbon

Abstract. This model study addresses the change in pelagic calcium carbonate production (CaCO3, as calcite in the model) and dissolution in response to rising atmospheric CO2. The parameterization of CaCO3 production includes a dependency on the saturation state of seawater with respect to calcite. It was derived from laboratory and mesocosm studies on particulate organic and inorganic carbon production in Emiliania huxleyi as a function of pCO2. The model predicts values of CaCO3 production and dissolution in line with recent estimates. The effect of rising pCO2 on CaCO3 production and dissolution was quantified by means of model simulations forced with atmospheric CO2 increasing at a rate of 1% per year from 286 ppm to 1144 ppm. The simulation predicts a decrease of CaCO3 production by 27%. The combined change in production and dissolution of CaCO3 yields an excess uptake of CO2 from the atmosphere by the ocean of 5.9 GtC.

scholarly journals The fate of pelagic CaCO<sub>3</sub> production in a high CO<sub>2</sub> ocean: a model study

2007 ◽  
Vol 4 (4) ◽  
pp. 505-519 ◽  
Author(s):  
M. Gehlen ◽  
R. Gangstø ◽  
B. Schneider ◽  
L. Bopp ◽  
O. Aumont ◽  
...  
Keyword(s):  
Calcium Carbonate ◽  
Inorganic Carbon ◽  
Atmospheric Co2 ◽  
Saturation State ◽  
Carbonate Production ◽  
Model Simulations ◽  
Carbon Production ◽  
Model Study ◽  
Time Period ◽  
Organic And Inorganic Carbon

Abstract. This model study addresses the change in pelagic calcium carbonate production (CaCO3, as calcite in the model) and dissolution in response to rising atmospheric CO2. The parameterization of CaCO3 production includes a dependency on the saturation state of seawater with respect to calcite. It was derived from laboratory and mesocosm studies on particulate organic and inorganic carbon production in Emiliania huxleyi as a function of pCO2. The model predicts values of CaCO3 production and dissolution in line with recent estimates. The effect of rising pCO2 on CaCO3 production and dissolution was quantified by means of model simulations forced with atmospheric CO2 increasing at a rate of 1% per year from 286 ppm to 1144 ppm over a 140 year time-period. The simulation predicts a decrease of CaCO3 production by 27%. The combined change in production and dissolution of CaCO3 yields an excess uptake of CO2 from the atmosphere by the ocean of 5.9 GtC over the period of 140 years.

scholarly journals Reduced growth with increased quotas of particulate organic and inorganic carbon in the coccolithophore <i>Emiliania huxleyi</i> under future ocean climate change conditions

2020 ◽  
Author(s):  
Yong Zhang ◽  
Sinéad Collins ◽  
Kunshan Gao
Keyword(s):  
Growth Rate ◽  
Population Growth ◽  
Ocean Acidification ◽  
Population Growth Rate ◽  
Inorganic Carbon ◽  
Inorganic Nitrogen ◽  
Emiliania Huxleyi ◽  
Environmental Drivers ◽  
Nutrient Concentrations ◽  
Organic And Inorganic Carbon

Abstract. Effects of ocean acidification and warming on marine primary producers can be modulated by other environmental factors, such as levels of nutrients and light. Here, we investigated the interactive effects of five oceanic environmental drivers (CO2, temperature, light, dissolved inorganic nitrogen and phosphate) on growth rate, particulate organic (POC) and inorganic (PIC) carbon quotas of the cosmopolitan coccolithophore Emiliania huxleyi. Population growth rate increased with increasing temperature (16 to 20 °C) and light intensities (60 to 240 μmol photons m−2  s−1), but decreased with elevated pCO2 concentrations (370 to 960 μatm) and reduced availability of nitrate (24.3 to 7.8 μmol L−1) and phosphate (1.5 to 0.5 μmol L−1). POC quotas were predominantly enhanced by combined effects of increased pCO2 and decreased availability of phosphate. PIC quotas increased with decreased availability of nitrate and phosphate. Our results show that concurrent changes in nutrient concentrations and pCO2 levels predominantly affected growth, photosynthetic carbon fixation and calcification of E. huxleyi, and imply that plastic responses to progressive ocean acidification, warming and decreasing availability of nitrate and phosphate reduce population growth rate while increasing cellular quotas of particulate organic and inorganic carbon of E. huxleyi, ultimately affecting coccolithophore-related ecological and biogeochemical processes.

Organic and inorganic carbon production in the Gulf of Maine

2000 ◽  
Vol 20 (6) ◽  
pp. 685-705 ◽  
Author(s):  
Lisa M. Graziano ◽  
William M. Balch ◽  
David Drapeau ◽  
Bruce C. Bowler ◽  
Robert Vaillancourt ◽  
...  
Keyword(s):  
Inorganic Carbon ◽  
Gulf Of Maine ◽  
Carbon Production ◽  
Organic And Inorganic Carbon

scholarly journals Strain-specific responses of <i>Emiliania huxleyi</i> to changing seawater carbonate chemistry

2009 ◽  
Vol 6 (2) ◽  
pp. 4361-4383 ◽  
Author(s):  
G. Langer ◽  
G. Nehrke ◽  
I. Probert ◽  
J. Ly ◽  
P. Ziveri
Keyword(s):  
Carbon Content ◽  
Genetic Basis ◽  
Inorganic Carbon ◽  
Emiliania Huxleyi ◽  
Organic Carbon Content ◽  
Carbonate Chemistry ◽  
Carbon Production ◽  
Seawater Carbonate Chemistry ◽  
Different Strains ◽  
Particulate Inorganic Carbon

Abstract. Four strains of the coccolithophore Emiliania huxleyi (RCC1212, RCC1216, RCC1238, RCC1256) were grown in dilute batch culture at four CO2 levels ranging from ~200 μatm to ~1200 μatm. Growth rate, particulate organic carbon content, and particulate inorganic carbon content were measured, and organic and inorganic carbon production calculated. The four strains did not show a uniform response to carbonate chemistry changes in any of the analysed parameters and none of the four strains displayed a response pattern previously described for this species. We conclude that the sensitivity of different strains of E. huxleyi to acidification differs substantially and that this likely has a genetic basis. We propose that this can explain apparently contradictory results reported in the literature.

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