Combined effects of solar UV radiation and CO2-induced seawater acidification on photosynthetic carbon fixation of phytoplankton assemblages in the South China Sea, 2010
We carried out short term pCO2/pH perturbation experiments in the coastal waters of the South China Sea to evaluate the combined effects of seawater acidification (low pH/high pCO2) and solar UV radiation (UVR, 280-400 nm) on photosynthetic carbon fixation of phytoplankton assemblages. Under photosy...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.758222 2023-05-15T17:50:48+02:00 Combined effects of solar UV radiation and CO2-induced seawater acidification on photosynthetic carbon fixation of phytoplankton assemblages in the South China Sea, 2010 Wu, YaPing Gao, Kunshan 2010-03-11 application/zip, 3 datasets https://doi.pangaea.de/10.1594/PANGAEA.758222 https://doi.org/10.1594/PANGAEA.758222 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.758222 https://doi.org/10.1594/PANGAEA.758222 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Wu, YaPing; Gao, Kunshan (2010): Combined effects of solar UV radiation and CO2-induced seawater acidification on photosynthetic carbon fixation of phytoplankton assemblages in the South China Sea. Chinese Science Bulletin, 55(32), 3680-3686, https://doi.org/10.1007/s11434-010-4119-y Bottles or small containers/Aquaria (<20 L) Coast and continental shelf Entire community EPOCA EUR-OCEANS European network of excellence for Ocean Ecosystems Analysis European Project on Ocean Acidification Laboratory experiment Light North Pacific OA-ICC Ocean Acidification International Coordination Centre Pelagos Phytoplankton Primary production/Photosynthesis Temperate Dataset 2010 ftpangaea https://doi.org/10.1594/PANGAEA.758222 https://doi.org/10.1007/s11434-010-4119-y 2023-01-20T07:32:06Z We carried out short term pCO2/pH perturbation experiments in the coastal waters of the South China Sea to evaluate the combined effects of seawater acidification (low pH/high pCO2) and solar UV radiation (UVR, 280-400 nm) on photosynthetic carbon fixation of phytoplankton assemblages. Under photosynthetically active radiation (PAR) alone treatments, reduced pCO2 (190 ppmv) with increased pH resulted in a significant decrease in the photosynthetic carbon fixation rate (about 23%), while enriched pCO2 (700 ppmv) with lowered pH had no significant effect on the photosynthetic performance compared to the ambient level. The apparent photosynthetic efficiency decreased under the reduced pCO2 level, probably due to C-limitation as well as energy being diverged for up-regulation of carbon concentrating mechanisms (CCMs). In the presence of UVR, both UV-A and UV-B caused photosynthetic inhibition, though UV-A appeared to enhance the photosynthetic efficiency under lower PAR levels. UV-B caused less inhibition of photosynthesis under the reduced pCO2 level, probably because of its contribution to the inorganic carbon (Ci)-acquisition processes. Under the seawater acidification conditions (enriched pCO2), both UV-A and UV-B reduced the photosynthetic carbon fixation to higher extents compared to the ambient pCO2 conditions. We conclude that solar UV and seawater acidification could synergistically inhibit photosynthesis. Dataset Ocean acidification PANGAEA - Data Publisher for Earth & Environmental Science Pacific |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Bottles or small containers/Aquaria (<20 L) Coast and continental shelf Entire community EPOCA EUR-OCEANS European network of excellence for Ocean Ecosystems Analysis European Project on Ocean Acidification Laboratory experiment Light North Pacific OA-ICC Ocean Acidification International Coordination Centre Pelagos Phytoplankton Primary production/Photosynthesis Temperate |
spellingShingle |
Bottles or small containers/Aquaria (<20 L) Coast and continental shelf Entire community EPOCA EUR-OCEANS European network of excellence for Ocean Ecosystems Analysis European Project on Ocean Acidification Laboratory experiment Light North Pacific OA-ICC Ocean Acidification International Coordination Centre Pelagos Phytoplankton Primary production/Photosynthesis Temperate Wu, YaPing Gao, Kunshan Combined effects of solar UV radiation and CO2-induced seawater acidification on photosynthetic carbon fixation of phytoplankton assemblages in the South China Sea, 2010 |
topic_facet |
Bottles or small containers/Aquaria (<20 L) Coast and continental shelf Entire community EPOCA EUR-OCEANS European network of excellence for Ocean Ecosystems Analysis European Project on Ocean Acidification Laboratory experiment Light North Pacific OA-ICC Ocean Acidification International Coordination Centre Pelagos Phytoplankton Primary production/Photosynthesis Temperate |
description |
We carried out short term pCO2/pH perturbation experiments in the coastal waters of the South China Sea to evaluate the combined effects of seawater acidification (low pH/high pCO2) and solar UV radiation (UVR, 280-400 nm) on photosynthetic carbon fixation of phytoplankton assemblages. Under photosynthetically active radiation (PAR) alone treatments, reduced pCO2 (190 ppmv) with increased pH resulted in a significant decrease in the photosynthetic carbon fixation rate (about 23%), while enriched pCO2 (700 ppmv) with lowered pH had no significant effect on the photosynthetic performance compared to the ambient level. The apparent photosynthetic efficiency decreased under the reduced pCO2 level, probably due to C-limitation as well as energy being diverged for up-regulation of carbon concentrating mechanisms (CCMs). In the presence of UVR, both UV-A and UV-B caused photosynthetic inhibition, though UV-A appeared to enhance the photosynthetic efficiency under lower PAR levels. UV-B caused less inhibition of photosynthesis under the reduced pCO2 level, probably because of its contribution to the inorganic carbon (Ci)-acquisition processes. Under the seawater acidification conditions (enriched pCO2), both UV-A and UV-B reduced the photosynthetic carbon fixation to higher extents compared to the ambient pCO2 conditions. We conclude that solar UV and seawater acidification could synergistically inhibit photosynthesis. |
format |
Dataset |
author |
Wu, YaPing Gao, Kunshan |
author_facet |
Wu, YaPing Gao, Kunshan |
author_sort |
Wu, YaPing |
title |
Combined effects of solar UV radiation and CO2-induced seawater acidification on photosynthetic carbon fixation of phytoplankton assemblages in the South China Sea, 2010 |
title_short |
Combined effects of solar UV radiation and CO2-induced seawater acidification on photosynthetic carbon fixation of phytoplankton assemblages in the South China Sea, 2010 |
title_full |
Combined effects of solar UV radiation and CO2-induced seawater acidification on photosynthetic carbon fixation of phytoplankton assemblages in the South China Sea, 2010 |
title_fullStr |
Combined effects of solar UV radiation and CO2-induced seawater acidification on photosynthetic carbon fixation of phytoplankton assemblages in the South China Sea, 2010 |
title_full_unstemmed |
Combined effects of solar UV radiation and CO2-induced seawater acidification on photosynthetic carbon fixation of phytoplankton assemblages in the South China Sea, 2010 |
title_sort |
combined effects of solar uv radiation and co2-induced seawater acidification on photosynthetic carbon fixation of phytoplankton assemblages in the south china sea, 2010 |
publisher |
PANGAEA |
publishDate |
2010 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.758222 https://doi.org/10.1594/PANGAEA.758222 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
Supplement to: Wu, YaPing; Gao, Kunshan (2010): Combined effects of solar UV radiation and CO2-induced seawater acidification on photosynthetic carbon fixation of phytoplankton assemblages in the South China Sea. Chinese Science Bulletin, 55(32), 3680-3686, https://doi.org/10.1007/s11434-010-4119-y |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.758222 https://doi.org/10.1594/PANGAEA.758222 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.758222 https://doi.org/10.1007/s11434-010-4119-y |
_version_ |
1766157699099131904 |