Coral Uptake of Inorganic Phosphorus and Nitrogen Negatively Affected by Simultaneous Changes in Temperature and pH
The effects of ocean acidification and elevated seawater temperature on coral calcification and photosynthesis have been extensively investigated over the last two decades, whereas they are still unknown on nutrient uptake, despite their importance for coral energetics. We therefore studied the sepa...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.397.3427 2023-05-15T17:51:40+02:00 Coral Uptake of Inorganic Phosphorus and Nitrogen Negatively Affected by Simultaneous Changes in Temperature and pH Claire Godinot Fanny Houlbrèque Renaud Grover Christine Ferrier-pagès The Pennsylvania State University CiteSeerX Archives 2011 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.397.3427 http://hal.inria.fr/docs/00/66/84/01/PDF/Godinot_et_al_-_2011_-_PLOS.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.397.3427 http://hal.inria.fr/docs/00/66/84/01/PDF/Godinot_et_al_-_2011_-_PLOS.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://hal.inria.fr/docs/00/66/84/01/PDF/Godinot_et_al_-_2011_-_PLOS.pdf text 2011 ftciteseerx 2016-09-25T00:07:09Z The effects of ocean acidification and elevated seawater temperature on coral calcification and photosynthesis have been extensively investigated over the last two decades, whereas they are still unknown on nutrient uptake, despite their importance for coral energetics. We therefore studied the separate and combined impacts of increases in temperature and pCO2 on phosphate, ammonium, and nitrate uptake rates by the scleractinian coral S. pistillata. Three experiments were performed, during 10 days i) at three pHT conditions (8.1, 7.8, and 7.5) and normal temperature (26uC), ii) at three temperature conditions (26u, 29uC, and 33uC) and normal pHT (8.1), and iii) at three pHT conditions (8.1, 7.8, and 7.5) and elevated temperature (33uC). After 10 days of incubation, corals had not bleached, as protein, chlorophyll, and zooxanthellae contents were the same in all treatments. However, photosynthetic rates significantly decreased at 33uC, and were further reduced for the pHT 7.5. The photosynthetic efficiency of PSII was only decreased by elevated temperature. Nutrient uptake rates were not affected by a change in pH alone. Conversely, elevated temperature (33uC) alone induced an increase in phosphate uptake but a severe decrease in nitrate and ammonium uptake rates, even leading to a release of nitrogen into seawater. Combination of high temperature (33uC) and low pHT (7.5) resulted in a significant decrease in phosphate and nitrate uptake rates compared to control corals (26uC, pHT = 8.1). These results indicate that both inorganic nitrogen and phosphorus metabolism may be negatively affected by the cumulative effects of ocean warming and Text Ocean acidification Unknown |
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The effects of ocean acidification and elevated seawater temperature on coral calcification and photosynthesis have been extensively investigated over the last two decades, whereas they are still unknown on nutrient uptake, despite their importance for coral energetics. We therefore studied the separate and combined impacts of increases in temperature and pCO2 on phosphate, ammonium, and nitrate uptake rates by the scleractinian coral S. pistillata. Three experiments were performed, during 10 days i) at three pHT conditions (8.1, 7.8, and 7.5) and normal temperature (26uC), ii) at three temperature conditions (26u, 29uC, and 33uC) and normal pHT (8.1), and iii) at three pHT conditions (8.1, 7.8, and 7.5) and elevated temperature (33uC). After 10 days of incubation, corals had not bleached, as protein, chlorophyll, and zooxanthellae contents were the same in all treatments. However, photosynthetic rates significantly decreased at 33uC, and were further reduced for the pHT 7.5. The photosynthetic efficiency of PSII was only decreased by elevated temperature. Nutrient uptake rates were not affected by a change in pH alone. Conversely, elevated temperature (33uC) alone induced an increase in phosphate uptake but a severe decrease in nitrate and ammonium uptake rates, even leading to a release of nitrogen into seawater. Combination of high temperature (33uC) and low pHT (7.5) resulted in a significant decrease in phosphate and nitrate uptake rates compared to control corals (26uC, pHT = 8.1). These results indicate that both inorganic nitrogen and phosphorus metabolism may be negatively affected by the cumulative effects of ocean warming and |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Claire Godinot Fanny Houlbrèque Renaud Grover Christine Ferrier-pagès |
spellingShingle |
Claire Godinot Fanny Houlbrèque Renaud Grover Christine Ferrier-pagès Coral Uptake of Inorganic Phosphorus and Nitrogen Negatively Affected by Simultaneous Changes in Temperature and pH |
author_facet |
Claire Godinot Fanny Houlbrèque Renaud Grover Christine Ferrier-pagès |
author_sort |
Claire Godinot |
title |
Coral Uptake of Inorganic Phosphorus and Nitrogen Negatively Affected by Simultaneous Changes in Temperature and pH |
title_short |
Coral Uptake of Inorganic Phosphorus and Nitrogen Negatively Affected by Simultaneous Changes in Temperature and pH |
title_full |
Coral Uptake of Inorganic Phosphorus and Nitrogen Negatively Affected by Simultaneous Changes in Temperature and pH |
title_fullStr |
Coral Uptake of Inorganic Phosphorus and Nitrogen Negatively Affected by Simultaneous Changes in Temperature and pH |
title_full_unstemmed |
Coral Uptake of Inorganic Phosphorus and Nitrogen Negatively Affected by Simultaneous Changes in Temperature and pH |
title_sort |
coral uptake of inorganic phosphorus and nitrogen negatively affected by simultaneous changes in temperature and ph |
publishDate |
2011 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.397.3427 http://hal.inria.fr/docs/00/66/84/01/PDF/Godinot_et_al_-_2011_-_PLOS.pdf |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
http://hal.inria.fr/docs/00/66/84/01/PDF/Godinot_et_al_-_2011_-_PLOS.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.397.3427 http://hal.inria.fr/docs/00/66/84/01/PDF/Godinot_et_al_-_2011_-_PLOS.pdf |
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Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766158877683875840 |