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Coral calcification under daily oxygen saturation and pH dynamics reveals the important role of oxygen
Coral reefs are essential to many nations, and are currently in global decline. Although climate models predict decreases in seawater pH (∼0.3 units) and oxygen saturation (∼5 percentage points), these are exceeded by the current daily pH and oxygen fluctuations on many reefs (pH 7.8–8.7 and 27–241%...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
The Company of Biologists
2014
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4058083/ https://www.ncbi.nlm.nih.gov/pubmed/24857847 http://dx.doi.org/10.1242/bio.20147922 |
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author | Wijgerde, Tim Silva, Catarina I. F. Scherders, Vera van Bleijswijk, Judith Osinga, Ronald |
author_facet | Wijgerde, Tim Silva, Catarina I. F. Scherders, Vera van Bleijswijk, Judith Osinga, Ronald |
author_sort | Wijgerde, Tim |
collection | PubMed |
description | Coral reefs are essential to many nations, and are currently in global decline. Although climate models predict decreases in seawater pH (∼0.3 units) and oxygen saturation (∼5 percentage points), these are exceeded by the current daily pH and oxygen fluctuations on many reefs (pH 7.8–8.7 and 27–241% O(2) saturation). We investigated the effect of oxygen and pH fluctuations on coral calcification in the laboratory using the model species Acropora millepora. Light calcification rates were greatly enhanced (+178%) by increased seawater pH, but only at normoxia; hyperoxia completely negated this positive effect. Dark calcification rates were significantly inhibited (51–75%) at hypoxia, whereas pH had no effect. Our preliminary results suggest that within the current oxygen and pH range, oxygen has substantial control over coral growth, whereas the role of pH is limited. This has implications for reef formation in this era of rapid climate change, which is accompanied by a decrease in seawater oxygen saturation owing to higher water temperatures and coastal eutrophication. |
format | Online Article Text |
id | pubmed-4058083 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2014 |
publisher | The Company of Biologists |
record_format | MEDLINE/PubMed |
spelling | pubmed-40580832014-07-15 Coral calcification under daily oxygen saturation and pH dynamics reveals the important role of oxygen Wijgerde, Tim Silva, Catarina I. F. Scherders, Vera van Bleijswijk, Judith Osinga, Ronald Biol Open Research Article Coral reefs are essential to many nations, and are currently in global decline. Although climate models predict decreases in seawater pH (∼0.3 units) and oxygen saturation (∼5 percentage points), these are exceeded by the current daily pH and oxygen fluctuations on many reefs (pH 7.8–8.7 and 27–241% O(2) saturation). We investigated the effect of oxygen and pH fluctuations on coral calcification in the laboratory using the model species Acropora millepora. Light calcification rates were greatly enhanced (+178%) by increased seawater pH, but only at normoxia; hyperoxia completely negated this positive effect. Dark calcification rates were significantly inhibited (51–75%) at hypoxia, whereas pH had no effect. Our preliminary results suggest that within the current oxygen and pH range, oxygen has substantial control over coral growth, whereas the role of pH is limited. This has implications for reef formation in this era of rapid climate change, which is accompanied by a decrease in seawater oxygen saturation owing to higher water temperatures and coastal eutrophication. The Company of Biologists 2014-05-23 /pmc/articles/PMC4058083/ /pubmed/24857847 http://dx.doi.org/10.1242/bio.20147922 Text en © 2014. Published by The Company of Biologists Ltd http://creativecommons.org/licenses/by/3.0 This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution and reproduction in any medium provided that the original work is properly attributed. |
spellingShingle | Research Article Wijgerde, Tim Silva, Catarina I. F. Scherders, Vera van Bleijswijk, Judith Osinga, Ronald Coral calcification under daily oxygen saturation and pH dynamics reveals the important role of oxygen |
title | Coral calcification under daily oxygen saturation and pH dynamics reveals the important role of oxygen |
title_full | Coral calcification under daily oxygen saturation and pH dynamics reveals the important role of oxygen |
title_fullStr | Coral calcification under daily oxygen saturation and pH dynamics reveals the important role of oxygen |
title_full_unstemmed | Coral calcification under daily oxygen saturation and pH dynamics reveals the important role of oxygen |
title_short | Coral calcification under daily oxygen saturation and pH dynamics reveals the important role of oxygen |
title_sort | coral calcification under daily oxygen saturation and ph dynamics reveals the important role of oxygen |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4058083/ https://www.ncbi.nlm.nih.gov/pubmed/24857847 http://dx.doi.org/10.1242/bio.20147922 |
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