Citation:

s00338-008-0375-6

Name: Seawater carbonate chemistry during experiments with Stylophora pistillata, 2008
Published: 2008
License: https://creativecommons.org/licenses/by/3.0/
Keywords: Animalia; Benthic animals; Benthos; Calcification/Dissolution; Cnidaria; Coast and continental shelf; Containers and aquaria (20-1000 L or < 1 m**2); Laboratory experiment; Not applicable; Single species; Stylophora pistillata; Temperate

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Abstract:

The decrease in the saturation state of seawater, following seawater acidification, is believed to be the main factor leading to a decrease in the calcification of marine organisms. To provide a physiological explanation for this phenomenon, the effect of seawater acidification was studied on the calcification and photosynthesis of the scleractinian tropical coral Stylophora pistillata. Coral nubbins were incubated for 8 days at three different pH (7.6, 8.0, and 8.2). To differentiate between the effects of the various components of the carbonate chemistry (pH, CO32, HCO3, CO2), tanks were also maintained under similar pH, but with 2-mM HCO3 added to the seawater. The addition of 2-mM bicarbonate significantly increased the photosynthesis in S. pistillata, suggesting carbon-limited conditions. Conversely, photosynthesis was insensitive to changes in pH and pCO2. Seawater acidification decreased coral calcification by ca. 0.1-mg CaCO3 g-1 d-1 for a decrease of 0.1 pH units. This correlation suggested that seawater acidification affected coral calcification by decreasing the availability of the CO32 substrate for calcification. However, the decrease in coral calcification could also be attributed either to a decrease in extra- or intracellular pH or to a change in the buffering capacity of the medium, impairing supply of CO32 from HCO3.

Keyword(s):

Animalia; Benthic animals; Benthos; Calcification/Dissolution; Cnidaria; Coast and continental shelf; Containers and aquaria (20-1000 L or < 1 m**2); Laboratory experiment; Not applicable; Single species; Stylophora pistillata; Temperate

Project(s):

European network of excellence for Ocean Ecosystems Analysis (EUR-OCEANS)

European Project on Ocean Acidification (EPOCA)

Ocean Acidification International Coordination Centre (OA-ICC)

Funding:

Seventh Framework Programme (FP7), grant/award no. 211384 : European Project on Ocean Acidification

Sixth Framework Programme (FP6), grant/award no. 511106 : European network of excellence for Ocean Ecosystems Analysis

Event(s):

Marubini_etal_08 * Method/Device: Experiment (EXP)

Comment:

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).

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Experimental treatment	Exp treat		Marubini, Francesca
2	Carbonate system computation flag	CSC flag		Nisumaa, Anne-Marin	Calculated using seacarb after Nisumaa et al. (2010)
3	Temperature, water	Temp	°C	Marubini, Francesca
4	Salinity	Sal		Marubini, Francesca
5	Radiation, photosynthetically active	PAR	µmol/m²/s	Marubini, Francesca	Infrared gas analyzer (LI-COR 196SA)
6	pH	pH		Marubini, Francesca	Measured	Seawater scale
7	pH	pH		Nisumaa, Anne-Marin	Calculated using seacarb after Nisumaa et al. (2010)	Total scale
8	Alkalinity, total	AT	µmol/kg	Marubini, Francesca	Titration potentiometric (Metler-Toledo)
9	Carbon, inorganic, dissolved	DIC	µmol/kg	Nisumaa, Anne-Marin	Calculated using seacarb after Nisumaa et al. (2010)
10	Carbon dioxide	CO2	µmol/kg	Nisumaa, Anne-Marin	Calculated using seacarb after Nisumaa et al. (2010)
11	Carbonate ion	[CO3]2-	µmol/kg	Nisumaa, Anne-Marin	Calculated using seacarb after Nisumaa et al. (2010)
12	Bicarbonate ion	[HCO3]-	µmol/kg	Nisumaa, Anne-Marin	Calculated using seacarb after Nisumaa et al. (2010)
13	Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)	pCO2water_SST_wet	µatm	Nisumaa, Anne-Marin	Calculated using seacarb after Nisumaa et al. (2010)
14	Fugacity of carbon dioxide (water) at sea surface temperature (wet air)	fCO2water_SST_wet	µatm	Nisumaa, Anne-Marin	Calculated using seacarb after Nisumaa et al. (2010)
15	Aragonite saturation state	Omega Arg		Nisumaa, Anne-Marin	Calculated using seacarb after Nisumaa et al. (2010)
16	Calcite saturation state	Omega Cal		Nisumaa, Anne-Marin	Calculated using seacarb after Nisumaa et al. (2010)
17	Calcification rate of calcium carbonate	Calc rate CaCO3	mg/g/day	Marubini, Francesca	Buoyant weighing technique according to Davies (1989)

License:

Creative Commons Attribution 3.0 Unported (CC-BY-3.0)

Status:

Curation Level: Enhanced curation (CurationLevelC)

Size:

102 data points

Data

Download dataset as tab-delimited text — use the following character encoding:

1 Exp treat	2 CSC flag (Calculated using seacarb afte...)	3 Temp [°C]	4 Sal	5 PAR [µmol/m²/s] (Infrared gas analyzer (LI-COR...)	6 pH (Seawater scale, Measured)	7 pH (Total scale, Calculated using...)	8 AT [µmol/kg] (Titration potentiometric (Met...)	9 DIC [µmol/kg] (Calculated using seacarb afte...)	10 CO2 [µmol/kg] (Calculated using seacarb afte...)	11 [CO3]2- [µmol/kg] (Calculated using seacarb afte...)	12 [HCO3]- [µmol/kg] (Calculated using seacarb afte...)	13 pCO2water_SST_wet [µatm] (Calculated using seacarb afte...)	14 fCO2water_SST_wet [µatm] (Calculated using seacarb afte...)	15 Omega Arg (Calculated using seacarb afte...)	16 Omega Cal (Calculated using seacarb afte...)	17 Calc rate CaCO3 [mg/g/day] (Buoyant weighing technique ac...)
Treatment BA 7.6pH	15	26.5	38.3	300	7.58	7.59	2314	2204	35.5	99.1	2069	1323	1318.61	1.54	2.32	14.67
Treatment BA 8.0pH	15	26.5	38.3	300	7.97	7.98	2544	2224	13.8	232.5	1978	515	513.56	3.62	5.44	17.73
Treatment BA 8.2pH	15	26.5	38.3	300	8.19	8.20	2749	2243	7.9	364.8	1870	293	292.69	5.68	8.54	21.00
Treatment BE 7.6pH	15	26.5	38.3	300	7.56	7.57	3905	3762	63.5	161.7	3537	2367	2360.11	2.52	3.79	18.90
Treatment BE 8.0pH	15	26.5	38.3	300	7.95	7.96	4342	3881	25.3	389.1	3466	945	942.48	6.06	9.11	24.16
Treatment BE 8.2pH	15	26.5	38.3	300	8.16	8.17	4657	3927	14.9	602.6	3310	556	554.90	9.39	14.11	24.60