Coral calcification under daily oxygen saturation and pH dynamics reveals the important role of oxygen
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| Format: | Dataset Open Access |
| Langue: | en |
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PANGAEA
2014
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| _version_ | 1867168156431155200 |
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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 |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | 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. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_836845 |
| institution | PANGAEA |
| language | en |
| publishDate | 2014 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | 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 Acropora millepora; Alkalinity, total; Alkalinity, total, standard deviation; Animalia; Aragonite saturation state; Aragonite saturation state, standard deviation; Benthic animals; Benthos; Bicarbonate ion; Bicarbonate ion, standard deviation; Calcification/Dissolution; Calcification rate of calcium carbonate; Calcite saturation state; Calcite saturation state, standard deviation; Calculated; Calculated using seacarb after Nisumaa et al. (2010); Carbon, inorganic, dissolved; Carbon, inorganic, dissolved, standard deviation; Carbonate ion; Carbonate ion, standard deviation; Carbonate system computation flag; Carbon dioxide; Carbon dioxide, standard deviation; Cnidaria; Coast and continental shelf; Containers and aquaria (20-1000 L or < 1 m**2); Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Irradiance; Laboratory experiment; OA-ICC; Ocean acidification; Ocean Acidification International Coordination Centre; Other; Oxygen; Oxygen, standard deviation; Oxygen saturation; Partial pressure of carbon dioxide, standard deviation; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); pH; pH, standard deviation; pH, total scale; Potentiometric; Potentiometric titration; Salinity; Single species; South Pacific; Species; Temperature, water; Temperature, water, standard deviation 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. |
| title | Coral calcification under daily oxygen saturation and pH dynamics reveals the important role of oxygen |
| topic | Acropora millepora; Alkalinity, total; Alkalinity, total, standard deviation; Animalia; Aragonite saturation state; Aragonite saturation state, standard deviation; Benthic animals; Benthos; Bicarbonate ion; Bicarbonate ion, standard deviation; Calcification/Dissolution; Calcification rate of calcium carbonate; Calcite saturation state; Calcite saturation state, standard deviation; Calculated; Calculated using seacarb after Nisumaa et al. (2010); Carbon, inorganic, dissolved; Carbon, inorganic, dissolved, standard deviation; Carbonate ion; Carbonate ion, standard deviation; Carbonate system computation flag; Carbon dioxide; Carbon dioxide, standard deviation; Cnidaria; Coast and continental shelf; Containers and aquaria (20-1000 L or < 1 m**2); Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Irradiance; Laboratory experiment; OA-ICC; Ocean acidification; Ocean Acidification International Coordination Centre; Other; Oxygen; Oxygen, standard deviation; Oxygen saturation; Partial pressure of carbon dioxide, standard deviation; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); pH; pH, standard deviation; pH, total scale; Potentiometric; Potentiometric titration; Salinity; Single species; South Pacific; Species; Temperature, water; Temperature, water, standard deviation |
| url | https://doi.org/10.1594/PANGAEA.836845 |