Seawater carbonate chemistry and biological processes during experiments with temperate coral Cladocora caespitosa, 2010


Autoria(s): Rodolfo-Metalpa, Riccardo; Martin, Sophie; Ferrier-Pagès, Christine; Gattuso, Jean-Pierre
Cobertura

DATE/TIME START: 2006-07-19T12:00:00 * DATE/TIME END: 2007-07-31T12:00:00

Data(s)

08/12/2010

Resumo

Atmospheric CO2 partial pressure (pCO2) is expected to increase to 700 µatm or more by the end of the present century. Anthropogenic CO2 is absorbed by the oceans, leading to decreases in pH and the CaCO3 saturation state of the seawater. Elevated pCO2 was shown to drastically decrease calcification rates in tropical zooxanthellate corals. Here we show, using the Mediterranean zooxanthellate coral Cladocora caespitosa, that an increase in pCO2, in the range predicted for 2100, does not reduce its calcification rate. Therefore, the conventional belief that calcification rates will be affected by ocean acidification may not be widespread in temperate corals. Seasonal change in temperature is the predominant factor controlling photosynthesis, respiration, calcification and symbiont density. An increase in pCO2, alone or in combination with elevated temperature, had no significant effect on photosynthesis, photosynthetic efficiency and calcification. The lack of sensitivity C. caespitosa to elevated pCO2 might be due to its slow growth rates, which seem to be more dependent on temperature than on the saturation state of calcium carbonate in the range projected for the end of the century.

Formato

text/tab-separated-values, 12601 data points

Identificador

https://doi.pangaea.de/10.1594/PANGAEA.754807

doi:10.1594/PANGAEA.754807

Idioma(s)

en

Publicador

PANGAEA

Relação

Rodolfo-Metalpa, Riccardo; Martin, Sophie; Ferrier-Pagès, Christine; Gattuso, Jean-Pierre (2010): Response of the temperate coral Cladocora caespitosa to mid- and long-term exposure to pCO2 and temperature levels projected for the year 2100 AD. Biogeosciences, 7(1), 289-300, doi:10.5194/bg-7-289-2010

Direitos

CC-BY: Creative Commons Attribution 3.0 Unported

Access constraints: unrestricted

Palavras-Chave #Alkalinity, total; Alkalinity anomaly technique (Smith and Key, 1975); Aragonite saturation state; BCA assay, Intact protein analyses (Smith et al., 1985); Bicarbonate ion; Buoyant weighing technique (Davies, 1989); Calcification rate of calcium carbonate; Calcite saturation state; Calculated; Calculated after Jeffrey & Humphrey (1975); Calculated using seacarb after Nisumaa et al. (2010); Carbon, inorganic, dissolved; Carbonate ion; Carbonate system computation flag; Carbon dioxide; Chlorophyll a+c2; DATE/TIME; EPOCA; European Project on Ocean Acidification; Experimental treatment; Gross photosynthesis rate; Identification; Measured; Metrohm 665 Dosimat titrator; Microscopy; Net photosynthesis rate; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); pH; pH meter (Metrohm, 826 pH mobile); Photosynthetic efficiencies; Protein; Pulse Amplitude Modulated fluorometer (Diving-PAM, Walz); Respiration rate, oxygen; Salinity; Sample ID; Strathkelvin oxygen electrode system; Temperature, water; Zooxanthellae
Tipo

Dataset