Coralline algal physiology is more adversely affected by elevated temperature than reduced pH
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| Format: | Dataset Open Access |
| Language: | en |
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PANGAEA
2016
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| _version_ | 1867170065349083136 |
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| author | Vásquez-Elizondo, Román Manuel Enríquez, Susana |
| author_facet | Vásquez-Elizondo, Román Manuel Enríquez, Susana |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | In this study we analyzed the physiological responses of coralline algae to ocean acidification (OA) and global warming, by exposing algal thalli of three species with contrasting photobiology and growth-form to reduced pH and elevated temperature. The analysis aimed to discern between direct and combined effects, while elucidating the role of light and photosynthesis inhibition in this response. We demonstrate the high sensitivity of coralline algae to photodamage under elevated temperature and its severe consequences on thallus photosynthesis and calcification rates. Moderate levels of light-stress, however, were maintained under reduced pH, resulting in no impact on algal photosynthesis, although moderate adverse effects on calcification rates were still observed. Accordingly, our results support the conclusion that global warming is a stronger threat to algal performance than OA, in particular in highly illuminated habitats such as coral reefs. We provide in this study a quantitative physiological model for the estimation of the impact of thermal-stress on coralline carbonate production, useful to foresee the impact of global warming on coralline contribution to reef carbon budgets, reef cementation, coral recruitment and the maintenance of reef biodiversity. This model, however, cannot yet account for the moderate physiological impact of low pH on coralline calcification. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_860802 |
| institution | PANGAEA |
| language | en |
| publishDate | 2016 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Coralline algal physiology is more adversely affected by elevated temperature than reduced pH Vásquez-Elizondo, Román Manuel Enríquez, Susana Alkalinity, total; Alkalinity, total, standard error; Amphiroa tribulus; Antennae pigment; Antennae pigment, standard error; Aragonite saturation state; Benthos; Bicarbonate ion; Calcification/Dissolution; Calcification rate, standard error; Calcification rate of calcium carbonate; Calcite saturation state; Calcite saturation state, standard error; Calculated using CO2SYS; Calculated using seacarb after Nisumaa et al. (2010); Carbon, inorganic, dissolved; Carbon, inorganic, dissolved, standard error; Carbonate ion; Carbonate ion, standard error; Carbonate system computation flag; Carbon dioxide; Chlorophyll a; Chlorophyll a, standard error; Coast and continental shelf; Containers and aquaria (20-1000 L or < 1 m**2); EXP; Experiment; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Gross photosynthesis/respiration ratio; Gross photosynthesis/respiration ratio, standard error; Gross photosynthesis rate, oxygen; Gross photosynthesis rate, oxygen, standard error; Irradiance; Laboratory experiment; Lithothamnion sp.; Macroalgae; Maximum photochemical quantum yield of photosystem II; Maximum photochemical quantum yield of photosystem II, standard error; Neogoniolithon sp.; North Atlantic; OA-ICC; Ocean acidification; Ocean Acidification International Coordination Centre; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); Partial pressure of carbon dioxide (water) at sea surface temperature (wet air), standard error; pH, NBS scale; pH, standard error; pH, total scale; Plantae; Primary production/Photosynthesis; Puerto_Morelos; Registration number of species; Respiration; Respiration rate, oxygen; Respiration rate, oxygen, standard error; Rhodophyta; Salinity; Salinity, standard error; Single species; Species; Temperature; Temperature, water; Temperature, water, standard error; Time in days; Treatment; Tropical; Type; Uniform resource locator/link to reference In this study we analyzed the physiological responses of coralline algae to ocean acidification (OA) and global warming, by exposing algal thalli of three species with contrasting photobiology and growth-form to reduced pH and elevated temperature. The analysis aimed to discern between direct and combined effects, while elucidating the role of light and photosynthesis inhibition in this response. We demonstrate the high sensitivity of coralline algae to photodamage under elevated temperature and its severe consequences on thallus photosynthesis and calcification rates. Moderate levels of light-stress, however, were maintained under reduced pH, resulting in no impact on algal photosynthesis, although moderate adverse effects on calcification rates were still observed. Accordingly, our results support the conclusion that global warming is a stronger threat to algal performance than OA, in particular in highly illuminated habitats such as coral reefs. We provide in this study a quantitative physiological model for the estimation of the impact of thermal-stress on coralline carbonate production, useful to foresee the impact of global warming on coralline contribution to reef carbon budgets, reef cementation, coral recruitment and the maintenance of reef biodiversity. This model, however, cannot yet account for the moderate physiological impact of low pH on coralline calcification. |
| title | Coralline algal physiology is more adversely affected by elevated temperature than reduced pH |
| topic | Alkalinity, total; Alkalinity, total, standard error; Amphiroa tribulus; Antennae pigment; Antennae pigment, standard error; Aragonite saturation state; Benthos; Bicarbonate ion; Calcification/Dissolution; Calcification rate, standard error; Calcification rate of calcium carbonate; Calcite saturation state; Calcite saturation state, standard error; Calculated using CO2SYS; Calculated using seacarb after Nisumaa et al. (2010); Carbon, inorganic, dissolved; Carbon, inorganic, dissolved, standard error; Carbonate ion; Carbonate ion, standard error; Carbonate system computation flag; Carbon dioxide; Chlorophyll a; Chlorophyll a, standard error; Coast and continental shelf; Containers and aquaria (20-1000 L or < 1 m**2); EXP; Experiment; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Gross photosynthesis/respiration ratio; Gross photosynthesis/respiration ratio, standard error; Gross photosynthesis rate, oxygen; Gross photosynthesis rate, oxygen, standard error; Irradiance; Laboratory experiment; Lithothamnion sp.; Macroalgae; Maximum photochemical quantum yield of photosystem II; Maximum photochemical quantum yield of photosystem II, standard error; Neogoniolithon sp.; North Atlantic; OA-ICC; Ocean acidification; Ocean Acidification International Coordination Centre; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); Partial pressure of carbon dioxide (water) at sea surface temperature (wet air), standard error; pH, NBS scale; pH, standard error; pH, total scale; Plantae; Primary production/Photosynthesis; Puerto_Morelos; Registration number of species; Respiration; Respiration rate, oxygen; Respiration rate, oxygen, standard error; Rhodophyta; Salinity; Salinity, standard error; Single species; Species; Temperature; Temperature, water; Temperature, water, standard error; Time in days; Treatment; Tropical; Type; Uniform resource locator/link to reference |
| url | https://doi.org/10.1594/PANGAEA.860802 |