Combined effects of ocean acidification and solar UV radiation on photosynthesis, growth, pigmentation and calcification of the coralline alga Corallina sessilis (Rhodophyta)
Previous studies have shown that increasing atmospheric CO2 concentrations affect calcification in some planktonic and macroalgal calcifiers due to the changed carbonate chemistry of seawater. However, little is known regarding how calcifying algae respond to solar UV radiation (UVR, UVA+UVB, 280-40...
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ftxiamenuniv:oai:dspace.xmu.edu.cn:2288/1751 2023-05-15T17:49:51+02:00 Combined effects of ocean acidification and solar UV radiation on photosynthesis, growth, pigmentation and calcification of the coralline alga Corallina sessilis (Rhodophyta) Gao, Kunshan 高坤山 Zheng, Yangqiao(Chinese Acad Fisheries Sci, E China Sea Fisheries Res Inst, Minist Agr, Key Lab Marine & Estuarine Fisheries Resources &, Shanghai 200090, Peoples R China) 2010-08 https://doi.org/10.1111/j.1365-2486.2009.02113.x http://dspace.xmu.edu.cn/handle/2288/1751 en eng WILEY-BLACKWELL PUBLISHING, INC GLOBAL CHANGE BIOLOGY ,2010,16(8):2388-2398 1354-1013 http://dx.doi.org/doi:10.1111/j.1365-2486.2009.02113.x http://dspace.xmu.edu.cn/handle/2288/1751 calcification CO2 Corallina sessilis coralline algae ocean acidification photosynthesis UV UV-absorbing compounds Article 2010 ftxiamenuniv https://doi.org/10.1111/j.1365-2486.2009.02113.x 2020-07-21T11:15:44Z Previous studies have shown that increasing atmospheric CO2 concentrations affect calcification in some planktonic and macroalgal calcifiers due to the changed carbonate chemistry of seawater. However, little is known regarding how calcifying algae respond to solar UV radiation (UVR, UVA+UVB, 280-400 nm). UVR may act synergistically, antagonistically or independently with ocean acidification (high CO2/low pH of seawater) to affect their calcification processes. We cultured the articulated coralline alga Corallina sessilis Yendo at 380 ppmv (low) and 1000 ppmv (high) CO2 levels while exposing the alga to solar radiation treatments with or without UVR. The presence of UVR inhibited the growth, photosynthetic O-2 evolution and calcification rates by13%, 6% and 3% in the low and by 47%, 20% and 8% in the high CO2 concentrations, respectively, reflecting a synergistic effect of CO2 enrichment with UVR. UVR induced significant decline of pH in the CO2-enriched cultures. The contents of key photosynthetic pigments, chlorophyll a and phycobiliproteins decreased, while UV-absorptivity increased under the high pCO(2)/low pH condition. Nevertheless, UV-induced inhibition of photosynthesis increased when the ratio of particulate inorganic carbon/particulate organic carbon decreased under the influence of CO2-acidified seawater, suggesting that the calcified layer played a UV-protective role. Both UVA and UVB negatively impacted photosynthesis and calcification, but the inhibition caused by UVB was about 2.5-2.6 times that caused by UVA. The results imply that coralline algae suffer from more damage caused by UVB as they calcify less and less with progressing ocean acidification. National Basic Research Program of China [2009CB421207]; National Natural Science Foundation of China [40930846, 40676063] Article in Journal/Newspaper Ocean acidification Xiamen University Institutional Repository Global Change Biology 16 8 2388 2398 |
institution |
Open Polar |
collection |
Xiamen University Institutional Repository |
op_collection_id |
ftxiamenuniv |
language |
English |
topic |
calcification CO2 Corallina sessilis coralline algae ocean acidification photosynthesis UV UV-absorbing compounds |
spellingShingle |
calcification CO2 Corallina sessilis coralline algae ocean acidification photosynthesis UV UV-absorbing compounds Gao, Kunshan 高坤山 Zheng, Yangqiao(Chinese Acad Fisheries Sci, E China Sea Fisheries Res Inst, Minist Agr, Key Lab Marine & Estuarine Fisheries Resources &, Shanghai 200090, Peoples R China) Combined effects of ocean acidification and solar UV radiation on photosynthesis, growth, pigmentation and calcification of the coralline alga Corallina sessilis (Rhodophyta) |
topic_facet |
calcification CO2 Corallina sessilis coralline algae ocean acidification photosynthesis UV UV-absorbing compounds |
description |
Previous studies have shown that increasing atmospheric CO2 concentrations affect calcification in some planktonic and macroalgal calcifiers due to the changed carbonate chemistry of seawater. However, little is known regarding how calcifying algae respond to solar UV radiation (UVR, UVA+UVB, 280-400 nm). UVR may act synergistically, antagonistically or independently with ocean acidification (high CO2/low pH of seawater) to affect their calcification processes. We cultured the articulated coralline alga Corallina sessilis Yendo at 380 ppmv (low) and 1000 ppmv (high) CO2 levels while exposing the alga to solar radiation treatments with or without UVR. The presence of UVR inhibited the growth, photosynthetic O-2 evolution and calcification rates by13%, 6% and 3% in the low and by 47%, 20% and 8% in the high CO2 concentrations, respectively, reflecting a synergistic effect of CO2 enrichment with UVR. UVR induced significant decline of pH in the CO2-enriched cultures. The contents of key photosynthetic pigments, chlorophyll a and phycobiliproteins decreased, while UV-absorptivity increased under the high pCO(2)/low pH condition. Nevertheless, UV-induced inhibition of photosynthesis increased when the ratio of particulate inorganic carbon/particulate organic carbon decreased under the influence of CO2-acidified seawater, suggesting that the calcified layer played a UV-protective role. Both UVA and UVB negatively impacted photosynthesis and calcification, but the inhibition caused by UVB was about 2.5-2.6 times that caused by UVA. The results imply that coralline algae suffer from more damage caused by UVB as they calcify less and less with progressing ocean acidification. National Basic Research Program of China [2009CB421207]; National Natural Science Foundation of China [40930846, 40676063] |
format |
Article in Journal/Newspaper |
author |
Gao, Kunshan 高坤山 Zheng, Yangqiao(Chinese Acad Fisheries Sci, E China Sea Fisheries Res Inst, Minist Agr, Key Lab Marine & Estuarine Fisheries Resources &, Shanghai 200090, Peoples R China) |
author_facet |
Gao, Kunshan 高坤山 Zheng, Yangqiao(Chinese Acad Fisheries Sci, E China Sea Fisheries Res Inst, Minist Agr, Key Lab Marine & Estuarine Fisheries Resources &, Shanghai 200090, Peoples R China) |
author_sort |
Gao, Kunshan |
title |
Combined effects of ocean acidification and solar UV radiation on photosynthesis, growth, pigmentation and calcification of the coralline alga Corallina sessilis (Rhodophyta) |
title_short |
Combined effects of ocean acidification and solar UV radiation on photosynthesis, growth, pigmentation and calcification of the coralline alga Corallina sessilis (Rhodophyta) |
title_full |
Combined effects of ocean acidification and solar UV radiation on photosynthesis, growth, pigmentation and calcification of the coralline alga Corallina sessilis (Rhodophyta) |
title_fullStr |
Combined effects of ocean acidification and solar UV radiation on photosynthesis, growth, pigmentation and calcification of the coralline alga Corallina sessilis (Rhodophyta) |
title_full_unstemmed |
Combined effects of ocean acidification and solar UV radiation on photosynthesis, growth, pigmentation and calcification of the coralline alga Corallina sessilis (Rhodophyta) |
title_sort |
combined effects of ocean acidification and solar uv radiation on photosynthesis, growth, pigmentation and calcification of the coralline alga corallina sessilis (rhodophyta) |
publisher |
WILEY-BLACKWELL PUBLISHING, INC |
publishDate |
2010 |
url |
https://doi.org/10.1111/j.1365-2486.2009.02113.x http://dspace.xmu.edu.cn/handle/2288/1751 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_relation |
GLOBAL CHANGE BIOLOGY ,2010,16(8):2388-2398 1354-1013 http://dx.doi.org/doi:10.1111/j.1365-2486.2009.02113.x http://dspace.xmu.edu.cn/handle/2288/1751 |
op_doi |
https://doi.org/10.1111/j.1365-2486.2009.02113.x |
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Global Change Biology |
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16 |
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8 |
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2388 |
op_container_end_page |
2398 |
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1766156354921168896 |