The modulating effect of light intensity on the response of the coccolithophore Gephyrocapsa oceanica to ocean acidification
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| Autores principales: | , , , |
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| Formato: | Dataset Open Access |
| Lenguaje: | en |
| Publicado: |
PANGAEA
2016
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| _version_ | 1867168173768310784 |
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| author | Zhang, Yong Bach, Lennart Thomas Schulz, Kai Georg Riebesell, Ulf |
| author_facet | Zhang, Yong Bach, Lennart Thomas Schulz, Kai Georg Riebesell, Ulf |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Global change leads to a multitude of simultaneous modifications in the marine realm among which shoaling of the upper mixed layer, leading to enhanced surface layer light intensities, as well as increased carbon dioxide (CO2) concentration are some of the most critical environmental alterations for phytoplankton. In this study, we investigated the responses of growth, photosynthetic carbon fixation and calcification of the coccolithophore Gephyrocapsa oceanica to elevated inline image (51 Pa, 105 Pa, and 152 Pa) (1 Pa ~ 10 µatm) at a variety of light intensities (50-800 µmol photons/m**2/s). By fitting the light response curve, our results showed that rising inline image reduced the maximum rates for growth, photosynthetic carbon fixation and calcification. Increasing light intensity enhanced the sensitivity of these rate responses to inline image, and shifted the inline image optima toward lower levels. Combining the results of this and a previous study (Sett et al. 2014) on the same strain indicates that both limiting low inline image and inhibiting high inline image levels (this study) induce similar responses, reducing growth, carbon fixation and calcification rates of G. oceanica. At limiting low light intensities the inline image optima for maximum growth, carbon fixation and calcification are shifted toward higher levels. Interacting effects of simultaneously occurring environmental changes, such as increasing light intensity and ocean acidification, need to be considered when trying to assess metabolic rates of marine phytoplankton under future ocean scenarios. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_861157 |
| institution | PANGAEA |
| language | en |
| publishDate | 2016 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | The modulating effect of light intensity on the response of the coccolithophore Gephyrocapsa oceanica to ocean acidification Zhang, Yong Bach, Lennart Thomas Schulz, Kai Georg Riebesell, Ulf BIOACID; Biological Impacts of Ocean Acidification; Carbon, inorganic, particulate, production, standard deviation; Carbon, inorganic, particulate, production per cell; Carbon, organic, particulate, production, standard deviation; Carbon, organic, particulate, production per cell; Carbon, organic, particulate/Nitrogen, organic, particulate ratio; Carbon, organic, particulate/Nitrogen, organic, particulate ratio, standard deviation; Carbon dioxide, partial pressure; Electron transport rate, relative; Electron transport rate, relative, standard deviation; Experimental treatment; Growth rate; Growth rate, standard deviation; Initial slope of rapid light curve; Initial slope of rapid light curve, standard deviation; Light:Dark cycle; Light saturation point; Light saturation point, standard deviation; Particulate inorganic carbon/particulate organic carbon ratio; Particulate inorganic carbon/particulate organic carbon ratio, standard deviation; Radiation, photosynthetically active; Temperature, water Global change leads to a multitude of simultaneous modifications in the marine realm among which shoaling of the upper mixed layer, leading to enhanced surface layer light intensities, as well as increased carbon dioxide (CO2) concentration are some of the most critical environmental alterations for phytoplankton. In this study, we investigated the responses of growth, photosynthetic carbon fixation and calcification of the coccolithophore Gephyrocapsa oceanica to elevated inline image (51 Pa, 105 Pa, and 152 Pa) (1 Pa ~ 10 µatm) at a variety of light intensities (50-800 µmol photons/m**2/s). By fitting the light response curve, our results showed that rising inline image reduced the maximum rates for growth, photosynthetic carbon fixation and calcification. Increasing light intensity enhanced the sensitivity of these rate responses to inline image, and shifted the inline image optima toward lower levels. Combining the results of this and a previous study (Sett et al. 2014) on the same strain indicates that both limiting low inline image and inhibiting high inline image levels (this study) induce similar responses, reducing growth, carbon fixation and calcification rates of G. oceanica. At limiting low light intensities the inline image optima for maximum growth, carbon fixation and calcification are shifted toward higher levels. Interacting effects of simultaneously occurring environmental changes, such as increasing light intensity and ocean acidification, need to be considered when trying to assess metabolic rates of marine phytoplankton under future ocean scenarios. |
| title | The modulating effect of light intensity on the response of the coccolithophore Gephyrocapsa oceanica to ocean acidification |
| topic | BIOACID; Biological Impacts of Ocean Acidification; Carbon, inorganic, particulate, production, standard deviation; Carbon, inorganic, particulate, production per cell; Carbon, organic, particulate, production, standard deviation; Carbon, organic, particulate, production per cell; Carbon, organic, particulate/Nitrogen, organic, particulate ratio; Carbon, organic, particulate/Nitrogen, organic, particulate ratio, standard deviation; Carbon dioxide, partial pressure; Electron transport rate, relative; Electron transport rate, relative, standard deviation; Experimental treatment; Growth rate; Growth rate, standard deviation; Initial slope of rapid light curve; Initial slope of rapid light curve, standard deviation; Light:Dark cycle; Light saturation point; Light saturation point, standard deviation; Particulate inorganic carbon/particulate organic carbon ratio; Particulate inorganic carbon/particulate organic carbon ratio, standard deviation; Radiation, photosynthetically active; Temperature, water |
| url | https://doi.org/10.1594/PANGAEA.861157 |