Seawater carbonate chemistry and photosynthetic and calcification rate of the free-living coralline algae Phymatolithon lusitanicum
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| Natura: | Dataset Open Access |
| Lingua: | en |
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PANGAEA
2018
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| _version_ | 1867168194353954816 |
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| author | Sordo, Laura Santos, Rui Barrote, Isabel Silva, João |
| author_facet | Sordo, Laura Santos, Rui Barrote, Isabel Silva, João |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Mäerl/rhodolith beds are protected habitats that may be affected by ocean acidification (OA), but it is still unclear how the availability of CO2 will affect the metabolism of these organisms. Some of the inconsistencies found among OA experimental studies may be related to experimental exposure time and synergetic effects with other stressors. Here, we investigated the long‐term (up to 20 months) effects of OA on the production and calcification of the most common mäerl species of southern Portugal, Phymatolithon lusitanicum. Both the photosynthetic and calcification rates increased with CO2 after the first 11 months of the experiment, whereas respiration slightly decreased with CO2. After 20 months, the pattern was reversed. Acidified algae showed lower photosynthetic and calcification rates, as well as lower accumulated growth than control algae, suggesting that a metabolic threshold was exceeded. Our results indicate that long‐term exposure to high CO2 will decrease the resilience of Phymatolithon lusitanicum. Our results also show that shallow communities of these rhodoliths may be particularly at risk, while deeper rhodolith beds may become ocean acidification refuges for this biological community. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_892895 |
| institution | PANGAEA |
| language | en |
| publishDate | 2018 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Seawater carbonate chemistry and photosynthetic and calcification rate of the free-living coralline algae Phymatolithon lusitanicum Sordo, Laura Santos, Rui Barrote, Isabel Silva, João Alkalinity, total; Alkalinity, total, standard error; Aragonite saturation state; Aragonite saturation state, standard error; Armacao_de_Pera; Benthos; Bicarbonate ion; Buoyant weighing technique according to Davies (1989); Calcification/Dissolution; Calcification rate, standard deviation; Calcification rate, standard error; Calcification rate of calcium carbonate; Calcite saturation state; Calculated using CO2SYS; Calculated using seacarb after Nisumaa et al. (2010); Carbon, inorganic, dissolved; Carbon, inorganic, dissolved, standard error; Carbonate ion; Carbonate system computation flag; Carbon dioxide; Coast and continental shelf; Containers and aquaria (20-1000 L or < 1 m**2); Duration; EXP; Experiment; Experiment duration; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Growth, cumulative, per wet mass; Growth, cumulative, per wet mass, standard deviation; Growth/Morphology; Irradiance; Laboratory experiment; Macroalgae; Net photosynthesis rate, oxygen; Net photosynthesis rate, oxygen, standard error; North Atlantic; OA-ICC; Ocean acidification; Ocean Acidification International Coordination Centre; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); pH, NBS scale; pH, standard error; pH, total scale; Phymatolithon lusitanicum; Plantae; Primary production/Photosynthesis; Registration number of species; Rhodophyta; Salinity; Salinity, standard error; Single species; Species; Temperate; Temperature, water; Temperature, water, standard error; Type; Uniform resource locator/link to reference Mäerl/rhodolith beds are protected habitats that may be affected by ocean acidification (OA), but it is still unclear how the availability of CO2 will affect the metabolism of these organisms. Some of the inconsistencies found among OA experimental studies may be related to experimental exposure time and synergetic effects with other stressors. Here, we investigated the long‐term (up to 20 months) effects of OA on the production and calcification of the most common mäerl species of southern Portugal, Phymatolithon lusitanicum. Both the photosynthetic and calcification rates increased with CO2 after the first 11 months of the experiment, whereas respiration slightly decreased with CO2. After 20 months, the pattern was reversed. Acidified algae showed lower photosynthetic and calcification rates, as well as lower accumulated growth than control algae, suggesting that a metabolic threshold was exceeded. Our results indicate that long‐term exposure to high CO2 will decrease the resilience of Phymatolithon lusitanicum. Our results also show that shallow communities of these rhodoliths may be particularly at risk, while deeper rhodolith beds may become ocean acidification refuges for this biological community. |
| title | Seawater carbonate chemistry and photosynthetic and calcification rate of the free-living coralline algae Phymatolithon lusitanicum |
| topic | Alkalinity, total; Alkalinity, total, standard error; Aragonite saturation state; Aragonite saturation state, standard error; Armacao_de_Pera; Benthos; Bicarbonate ion; Buoyant weighing technique according to Davies (1989); Calcification/Dissolution; Calcification rate, standard deviation; Calcification rate, standard error; Calcification rate of calcium carbonate; Calcite saturation state; Calculated using CO2SYS; Calculated using seacarb after Nisumaa et al. (2010); Carbon, inorganic, dissolved; Carbon, inorganic, dissolved, standard error; Carbonate ion; Carbonate system computation flag; Carbon dioxide; Coast and continental shelf; Containers and aquaria (20-1000 L or < 1 m**2); Duration; EXP; Experiment; Experiment duration; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Growth, cumulative, per wet mass; Growth, cumulative, per wet mass, standard deviation; Growth/Morphology; Irradiance; Laboratory experiment; Macroalgae; Net photosynthesis rate, oxygen; Net photosynthesis rate, oxygen, standard error; North Atlantic; OA-ICC; Ocean acidification; Ocean Acidification International Coordination Centre; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); pH, NBS scale; pH, standard error; pH, total scale; Phymatolithon lusitanicum; Plantae; Primary production/Photosynthesis; Registration number of species; Rhodophyta; Salinity; Salinity, standard error; Single species; Species; Temperate; Temperature, water; Temperature, water, standard error; Type; Uniform resource locator/link to reference |
| url | https://doi.org/10.1594/PANGAEA.892895 |