Seawater carbonate chemistry and biological processes during experiments with phytoplankton Emiliania huxleyi (CS369), 2009
Increasing atmospheric CO2 concentration affects calcification in most planktonic calcifiers. Both reduced or stimulated calcification under high CO2 have been reported in the widespread coccolithophore Emiliania huxleyi. This might affect the response of cells to photosynthetically active radiation...
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ftdatacite:10.1594/pangaea.819634 2023-05-15T17:51:00+02:00 Seawater carbonate chemistry and biological processes during experiments with phytoplankton Emiliania huxleyi (CS369), 2009 Gao, Kunshan Ruan, Zuoxi Villafañe, Virginia E Helbling, E Walter Gattuso, Jean-Pierre 2009 application/zip https://dx.doi.org/10.1594/pangaea.819634 https://doi.pangaea.de/10.1594/PANGAEA.819634 en eng PANGAEA - Data Publisher for Earth & Environmental Science https://dx.doi.org/10.4319/lo.2009.54.6.1855 Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 CC-BY Bottles or small containers/Aquaria <20 L Calcification/Dissolution Chromista Emiliania huxleyi Growth/Morphology Haptophyta Laboratory experiment Laboratory strains Not applicable Pelagos Phytoplankton Primary production/Photosynthesis Single species Experiment European network of excellence for Ocean Ecosystems Analysis EUR-OCEANS European Project on Ocean Acidification EPOCA Ocean Acidification International Coordination Centre OA-ICC Collection of Datasets article Collection 2009 ftdatacite https://doi.org/10.1594/pangaea.819634 https://doi.org/10.4319/lo.2009.54.6.1855 2022-02-09T12:04:35Z Increasing atmospheric CO2 concentration affects calcification in most planktonic calcifiers. Both reduced or stimulated calcification under high CO2 have been reported in the widespread coccolithophore Emiliania huxleyi. This might affect the response of cells to photosynthetically active radiation (PAR; 400-700 nm) and ultraviolet radiation (UVR; 280-400 nm) by altering the thickness of the coccolith layer. Here we show that in the absence of UVR, the calcification rates in E. huxleyi decrease under lowered pH levels (pHNBS of 7.9 and 7.6; pCO2 of 81 and 178 Pa or 804 and 1759 ppmv, respectively) leading to thinned coccolith layers, whereas photosynthetic carbon fixation was slightly enhanced at pH 7.9 but remained unaffected at pH 7.6. Exposure to UVR (UV-A 19.5 W m**-2, UV-B 0.67 W m**-2) in addition to PAR (88.5 W m**-2), however, results in significant inhibition of both photosynthesis and calcification, and these rates are further inhibited with increasing acidification. The combined effects of UVR and seawater acidification resulted in the inhibition of calcification rates by 96% and 99% and that of photosynthesis by 6% and 15%, at pH 7.9 and 7.6, respectively. This differential inhibition of calcification and photosynthesis leads to significant reduction of the ratio of calcification to photosynthesis. Seawater acidification enhanced the transmission of harmful UVR by about 26% through a reduction of the coccolith layer of 31%. Our data indicate that the effect of a high-CO2 and low-pH ocean on E. huxleyi (because of reduced calcification associated with changes in the carbonate system) enhances the detrimental effects of UVR on the main pelagic calcifier. Article in Journal/Newspaper Ocean acidification DataCite Metadata Store (German National Library of Science and Technology) |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
Bottles or small containers/Aquaria <20 L Calcification/Dissolution Chromista Emiliania huxleyi Growth/Morphology Haptophyta Laboratory experiment Laboratory strains Not applicable Pelagos Phytoplankton Primary production/Photosynthesis Single species Experiment European network of excellence for Ocean Ecosystems Analysis EUR-OCEANS European Project on Ocean Acidification EPOCA Ocean Acidification International Coordination Centre OA-ICC |
spellingShingle |
Bottles or small containers/Aquaria <20 L Calcification/Dissolution Chromista Emiliania huxleyi Growth/Morphology Haptophyta Laboratory experiment Laboratory strains Not applicable Pelagos Phytoplankton Primary production/Photosynthesis Single species Experiment European network of excellence for Ocean Ecosystems Analysis EUR-OCEANS European Project on Ocean Acidification EPOCA Ocean Acidification International Coordination Centre OA-ICC Gao, Kunshan Ruan, Zuoxi Villafañe, Virginia E Helbling, E Walter Gattuso, Jean-Pierre Seawater carbonate chemistry and biological processes during experiments with phytoplankton Emiliania huxleyi (CS369), 2009 |
topic_facet |
Bottles or small containers/Aquaria <20 L Calcification/Dissolution Chromista Emiliania huxleyi Growth/Morphology Haptophyta Laboratory experiment Laboratory strains Not applicable Pelagos Phytoplankton Primary production/Photosynthesis Single species Experiment European network of excellence for Ocean Ecosystems Analysis EUR-OCEANS European Project on Ocean Acidification EPOCA Ocean Acidification International Coordination Centre OA-ICC |
description |
Increasing atmospheric CO2 concentration affects calcification in most planktonic calcifiers. Both reduced or stimulated calcification under high CO2 have been reported in the widespread coccolithophore Emiliania huxleyi. This might affect the response of cells to photosynthetically active radiation (PAR; 400-700 nm) and ultraviolet radiation (UVR; 280-400 nm) by altering the thickness of the coccolith layer. Here we show that in the absence of UVR, the calcification rates in E. huxleyi decrease under lowered pH levels (pHNBS of 7.9 and 7.6; pCO2 of 81 and 178 Pa or 804 and 1759 ppmv, respectively) leading to thinned coccolith layers, whereas photosynthetic carbon fixation was slightly enhanced at pH 7.9 but remained unaffected at pH 7.6. Exposure to UVR (UV-A 19.5 W m**-2, UV-B 0.67 W m**-2) in addition to PAR (88.5 W m**-2), however, results in significant inhibition of both photosynthesis and calcification, and these rates are further inhibited with increasing acidification. The combined effects of UVR and seawater acidification resulted in the inhibition of calcification rates by 96% and 99% and that of photosynthesis by 6% and 15%, at pH 7.9 and 7.6, respectively. This differential inhibition of calcification and photosynthesis leads to significant reduction of the ratio of calcification to photosynthesis. Seawater acidification enhanced the transmission of harmful UVR by about 26% through a reduction of the coccolith layer of 31%. Our data indicate that the effect of a high-CO2 and low-pH ocean on E. huxleyi (because of reduced calcification associated with changes in the carbonate system) enhances the detrimental effects of UVR on the main pelagic calcifier. |
format |
Article in Journal/Newspaper |
author |
Gao, Kunshan Ruan, Zuoxi Villafañe, Virginia E Helbling, E Walter Gattuso, Jean-Pierre |
author_facet |
Gao, Kunshan Ruan, Zuoxi Villafañe, Virginia E Helbling, E Walter Gattuso, Jean-Pierre |
author_sort |
Gao, Kunshan |
title |
Seawater carbonate chemistry and biological processes during experiments with phytoplankton Emiliania huxleyi (CS369), 2009 |
title_short |
Seawater carbonate chemistry and biological processes during experiments with phytoplankton Emiliania huxleyi (CS369), 2009 |
title_full |
Seawater carbonate chemistry and biological processes during experiments with phytoplankton Emiliania huxleyi (CS369), 2009 |
title_fullStr |
Seawater carbonate chemistry and biological processes during experiments with phytoplankton Emiliania huxleyi (CS369), 2009 |
title_full_unstemmed |
Seawater carbonate chemistry and biological processes during experiments with phytoplankton Emiliania huxleyi (CS369), 2009 |
title_sort |
seawater carbonate chemistry and biological processes during experiments with phytoplankton emiliania huxleyi (cs369), 2009 |
publisher |
PANGAEA - Data Publisher for Earth & Environmental Science |
publishDate |
2009 |
url |
https://dx.doi.org/10.1594/pangaea.819634 https://doi.pangaea.de/10.1594/PANGAEA.819634 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_relation |
https://dx.doi.org/10.4319/lo.2009.54.6.1855 |
op_rights |
Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/pangaea.819634 https://doi.org/10.4319/lo.2009.54.6.1855 |
_version_ |
1766157974607233024 |