Seawater carbonate chemistry, nutrients and growth rate during experiments with coral Astrangia poculata, 2010 ...

• Main Authors: Holcomb, Michael, McCorkle, Daniel C, Cohen, Anne L
• Format: Dataset
• Language: English
• Published: PANGAEA 2010
• Subjects: Animalia; Astrangia poculata; Benthic animals; Benthos; Bottles or small containers/Aquaria <20 L; Calcification/Dissolution; Cnidaria; Coast and continental shelf; Laboratory experiment; Macro-nutrients; Single species; Temperate; Experimental treatment; Salinity; Salinity, standard deviation; Temperature, water; Temperature, standard deviation; Phosphate; Phosphate, standard deviation; Silicate; Silicon, standard deviation; Nitrate and Nitrite; Nitrate and Nitrite, standard deviation; Partial pressure of carbon dioxide water at sea surface temperature wet air; Carbon dioxide, partial pressure, standard deviation; Alkalinity, total; Alkalinity, total, standard deviation; Calcification rate; Calcification rate, standard deviation; Carbonate system computation flag; pH; Carbon dioxide; Fugacity of carbon dioxide water at sea surface temperature wet air; Bicarbonate ion; Carbonate ion; Carbon, inorganic, dissolved; Aragonite saturation state; Calcite saturation state; Hach conductivity probe; Onset logger; Continuous flow injection system, FIAlab 2600; Infrared pCO2 analyzer Qubit S151; Alkalinity, Gran titration Gran, 1950; Buoyant weighing technique according to Davies 1989; Calculated using seacarb after Nisumaa et al. 2010; European network of excellence for Ocean Ecosystems Analysis EUR-OCEANS; European Project on Ocean Acidification EPOCA; Ocean acidification
• Online Access: https://dx.doi.org/10.1594/pangaea.754778; https://doi.pangaea.de/10.1594/PANGAEA.754778

Zooxanthellate colonies of the scleractinian coral Astrangia poculata were grown under combinations of ambient and elevated nutrients (5 µM NO, 0.3 µM PO4, and 2nM Fe) and CO2 (780 ppmv) treatments for a period of 6 months. Coral calcification rates, estimated from buoyant weights, were not significantly affected by moderately elevated nutrients at ambient CO2 and were negatively affected by elevated CO2 at ambient nutrient levels. However, calcification by corals reared under elevated nutrients combined with elevated CO2 was not significantly different from that of corals reared under ambient conditions, suggesting that CO2 enrichment can lead to nutrient limitation in zooxanthellate corals. A conceptual model is proposed to explain how nutrients and CO2 interact to control zooxanthellate coral calcification. Nutrient limited corals are unable to utilize an increase in dissolved inorganic carbon (DIC) as nutrients are already limiting growth, thus the effect of elevated CO2 on saturation state drives the ... : In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Lavigne and Gattuso, 2011) was used to compute a complete and consistent set of carbonate system variables, as described by Nisumaa et al. (2010). In this dataset the original values were archived in addition with the recalculated parameters (see related PI). ...