Citation:

2008GB003286

Name: Seawater carbonate chemistry and dissolution rates by boring microflora during ex situ experiments with dead corals (Porites lobata), 2009
Published: 2009
License: https://creativecommons.org/licenses/by/3.0/
Keywords: Benthos; Calcification/Dissolution; Coast and continental shelf; Containers and aquaria (20-1000 L or < 1 m**2); Entire community; Laboratory experiment; North Pacific; Rocky-shore community; Tropical

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Abstract:

Eight-month-old blocks of the coral Porites lobata colonized by natural Hawaiian euendolithic and epilithic communities were experimentally exposed to two different aqueous pCO2 treatments, 400 ppmv and 750 ppmv, for 3 months. The chlorophyte Ostreobium quekettii dominated communities at the start and at the end of the experiment (65-90%). There were no significant differences in the relative abundance of euendolithic species, nor were there any differences in bioeroded area at the surface of blocks (27%) between pCO2 treatments. The depth of penetration of filaments of O. quekettii was, however, significantly higher under 750 ppmv (1.4 mm) than under 400 ppmv (1 mm). Consequently, rates of carbonate dissolution measured under elevated pCO2 were 48% higher than under ambient pCO2 (0.46 kg CaCO3 dissolved m2/a versus 0.31 kg /m2/a). Thus, biogenic dissolution of carbonates by euendoliths in coral reefs may be a dominant mechanism of carbonate dissolution in a more acidic ocean.

Keyword(s):

Benthos; Calcification/Dissolution; Coast and continental shelf; Containers and aquaria (20-1000 L or < 1 m**2); Entire community; Laboratory experiment; North Pacific; Rocky-shore community; Tropical

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

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		Tribollet, Aline
2	Identification	ID		Tribollet, Aline
3	Salinity	Sal		Tribollet, Aline
4	Salinity, standard deviation	Sal std dev	±	Tribollet, Aline
5	Temperature, water	Temp	°C	Tribollet, Aline
6	Temperature, standard deviation	T std dev	±	Tribollet, Aline
7	Radiation, photosynthetically active	PAR	µmol/m²/s	Tribollet, Aline
8	Light:Dark cycle	L:D	hh:hh	Tribollet, Aline
9	pH	pH		Tribollet, Aline		NBS scale
10	pH, standard deviation	pH std dev	±	Tribollet, Aline
11	pH	pH		Tribollet, Aline	Calculated using CO2SYS	Total scale
12	Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)	pCO2water_SST_wet	µatm	Tribollet, Aline	Calculated using CO2SYS
13	Fugacity of carbon dioxide (water) at sea surface temperature (wet air)	fCO2water_SST_wet	µatm	Tribollet, Aline	Calculated using CO2SYS
14	Alkalinity, total	AT	µmol/kg	Tribollet, Aline	Measured
15	Alkalinity, total, standard deviation	AT std dev	±	Tribollet, Aline
16	Carbon, inorganic, dissolved	DIC	µmol/kg	Tribollet, Aline	Measured
17	Carbon, inorganic, dissolved, standard deviation	DIC std dev	±	Tribollet, Aline
18	Aragonite saturation state	Omega Arg		Tribollet, Aline	Calculated using CO2SYS
19	Calcite saturation state	Omega Cal		Tribollet, Aline	Calculated using CO2SYS
20	Ammonium	[NH4]+	µmol/l	Tribollet, Aline
21	Ammonium, standard deviation	[NH4]+ std dev	±	Tribollet, Aline
22	Phosphate	[PO4]3-	µmol/l	Tribollet, Aline
23	Phosphate, standard deviation	[PO4]3- std dev	±	Tribollet, Aline
24	Dissolution rate of calcium carbonate	Diss rate	kg/m²/a	Tribollet, Aline
25	Dissolution rate, standard deviation	Diss rate std dev	±	Tribollet, Aline
26	Carbonate system computation flag	CSC flag		Nisumaa, Anne-Marin	Calculated using seacarb after Nisumaa et al. (2010)
27	pH	pH		Nisumaa, Anne-Marin	Calculated using seacarb after Nisumaa et al. (2010)	Total scale
28	Carbon dioxide	CO2	µmol/kg	Nisumaa, Anne-Marin	Calculated using seacarb after Nisumaa et al. (2010)
29	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)
30	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)
31	Bicarbonate ion	[HCO3]-	µmol/kg	Nisumaa, Anne-Marin	Calculated using seacarb after Nisumaa et al. (2010)
32	Carbonate ion	[CO3]2-	µmol/kg	Nisumaa, Anne-Marin	Calculated using seacarb after Nisumaa et al. (2010)
33	Aragonite saturation state	Omega Arg		Nisumaa, Anne-Marin	Calculated using seacarb after Nisumaa et al. (2010)
34	Calcite saturation state	Omega Cal		Nisumaa, Anne-Marin	Calculated using seacarb after Nisumaa et al. (2010)

License:

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

Status:

Curation Level: Enhanced curation (CurationLevelC)

Size:

544 data points

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