Diatom performance in a future ocean: interactions between nitrogen limitation, temperature, and CO2-induced seawater acidification
Abstract Phytoplankton cells living in the surface waters of oceans are experiencing alterations in environmental conditions associated with global change. Given their importance in global primary productivity, it is of considerable concern to know how these organisms will perform physiologically un...
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Online Access: | http://dx.doi.org/10.1093/icesjms/fsx239 http://academic.oup.com/icesjms/article-pdf/75/4/1451/31236306/fsx239.pdf |
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croxfordunivpr:10.1093/icesjms/fsx239 2024-09-30T14:40:47+00:00 Diatom performance in a future ocean: interactions between nitrogen limitation, temperature, and CO2-induced seawater acidification Li, Futian Beardall, John Gao, Kunshan Sathyendranath, Shubha National Natural Science Foundation of China National Natural Science Foundation of China and Shandong province Xiamen University 2018 http://dx.doi.org/10.1093/icesjms/fsx239 http://academic.oup.com/icesjms/article-pdf/75/4/1451/31236306/fsx239.pdf en eng Oxford University Press (OUP) https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model ICES Journal of Marine Science volume 75, issue 4, page 1451-1464 ISSN 1054-3139 1095-9289 journal-article 2018 croxfordunivpr https://doi.org/10.1093/icesjms/fsx239 2024-09-10T04:11:13Z Abstract Phytoplankton cells living in the surface waters of oceans are experiencing alterations in environmental conditions associated with global change. Given their importance in global primary productivity, it is of considerable concern to know how these organisms will perform physiologically under the changing levels of pH, temperatures, and nutrients predicted for future oceanic ecosystems. Here we show that the model diatom, Thalassiosira pseudonana, when grown at different temperatures (20 or 24 °C), pCO2 (400 or 1000 µatm), and nitrate concentrations (2.5 or 102.5 µmol l−1), displayed contrasting performance in its physiology. Elevated pCO2 (and hence seawater acidification) under the nitrate-limited conditions led to decreases in specific growth rate, cell size, pigment content, photochemical quantum yield of PSII, and photosynthetic carbon fixation. Furthermore, increasing the temperature exacerbated the negative effects of the seawater acidification associated with elevated pCO2 on specific growth rate and chlorophyll content under the N-limited conditions. These results imply that a reduced upward transport of nutrients due to enhanced stratification associated with ocean warming might act synergistically to reduce growth and carbon fixation by diatoms under progressive ocean acidification, with important ramifications for ocean productivity and the strength of the biological CO2 pump. Article in Journal/Newspaper Ocean acidification Oxford University Press ICES Journal of Marine Science 75 4 1451 1464 |
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Oxford University Press |
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croxfordunivpr |
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English |
description |
Abstract Phytoplankton cells living in the surface waters of oceans are experiencing alterations in environmental conditions associated with global change. Given their importance in global primary productivity, it is of considerable concern to know how these organisms will perform physiologically under the changing levels of pH, temperatures, and nutrients predicted for future oceanic ecosystems. Here we show that the model diatom, Thalassiosira pseudonana, when grown at different temperatures (20 or 24 °C), pCO2 (400 or 1000 µatm), and nitrate concentrations (2.5 or 102.5 µmol l−1), displayed contrasting performance in its physiology. Elevated pCO2 (and hence seawater acidification) under the nitrate-limited conditions led to decreases in specific growth rate, cell size, pigment content, photochemical quantum yield of PSII, and photosynthetic carbon fixation. Furthermore, increasing the temperature exacerbated the negative effects of the seawater acidification associated with elevated pCO2 on specific growth rate and chlorophyll content under the N-limited conditions. These results imply that a reduced upward transport of nutrients due to enhanced stratification associated with ocean warming might act synergistically to reduce growth and carbon fixation by diatoms under progressive ocean acidification, with important ramifications for ocean productivity and the strength of the biological CO2 pump. |
author2 |
Sathyendranath, Shubha National Natural Science Foundation of China National Natural Science Foundation of China and Shandong province Xiamen University |
format |
Article in Journal/Newspaper |
author |
Li, Futian Beardall, John Gao, Kunshan |
spellingShingle |
Li, Futian Beardall, John Gao, Kunshan Diatom performance in a future ocean: interactions between nitrogen limitation, temperature, and CO2-induced seawater acidification |
author_facet |
Li, Futian Beardall, John Gao, Kunshan |
author_sort |
Li, Futian |
title |
Diatom performance in a future ocean: interactions between nitrogen limitation, temperature, and CO2-induced seawater acidification |
title_short |
Diatom performance in a future ocean: interactions between nitrogen limitation, temperature, and CO2-induced seawater acidification |
title_full |
Diatom performance in a future ocean: interactions between nitrogen limitation, temperature, and CO2-induced seawater acidification |
title_fullStr |
Diatom performance in a future ocean: interactions between nitrogen limitation, temperature, and CO2-induced seawater acidification |
title_full_unstemmed |
Diatom performance in a future ocean: interactions between nitrogen limitation, temperature, and CO2-induced seawater acidification |
title_sort |
diatom performance in a future ocean: interactions between nitrogen limitation, temperature, and co2-induced seawater acidification |
publisher |
Oxford University Press (OUP) |
publishDate |
2018 |
url |
http://dx.doi.org/10.1093/icesjms/fsx239 http://academic.oup.com/icesjms/article-pdf/75/4/1451/31236306/fsx239.pdf |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
ICES Journal of Marine Science volume 75, issue 4, page 1451-1464 ISSN 1054-3139 1095-9289 |
op_rights |
https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model |
op_doi |
https://doi.org/10.1093/icesjms/fsx239 |
container_title |
ICES Journal of Marine Science |
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75 |
container_issue |
4 |
container_start_page |
1451 |
op_container_end_page |
1464 |
_version_ |
1811643260945301504 |