Coral calcification under daily oxygen saturation and pH dynamics reveals the important role of oxygen
| Autor: | Vera Scherders, Tim Wijgerde, Judith van Bleijswijk, Catarina I. F. Silva, Ronald Osinga |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: |
0106 biological sciences
QH301-705.5 Science chemistry.chemical_element ocean acidification galaxea-fascicularis Acropora millepora 01 natural sciences Oxygen General Biochemistry Genetics and Molecular Biology Calcification 03 medical and health sciences reefs Aquaculture and Fisheries Galaxea fascicularis medicine Climate change 14. Life underwater Biology (General) impacts Oxygen saturation 030304 developmental biology Hyperoxia 0303 health sciences photosynthesis biology Aquacultuur en Visserij Ecology 010604 marine biology & hydrobiology carbonate chemistry Hypoxia (environmental) Ocean acidification biology.organism_classification chemistry 13. Climate action Environmental chemistry WIAS Seawater medicine.symptom scleractinian corals General Agricultural and Biological Sciences ecosystems light respiration Research Article |
| Zdroj: | Biology Open, Vol 3, Iss 6, Pp 489-493 (2014) Biology Open 3 (2014) 6 Biology Open Biology Open, 3(6), 489-493 |
| ISSN: | 2046-6390 |
| Popis: | 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% O2 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. |
| Databáze: | OpenAIRE |
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