Citation:

PANGAEA.959560

Name: Seawater carbonate chemistry and tropical coral calcification
Published: 2023-06-01
License: https://creativecommons.org/licenses/by/4.0/
Keywords: Acid-base regulation; Animalia; Benthic animals; Benthos; Biomass/Abundance/Elemental composition; Calcification/Dissolution; Cnidaria; Coast and continental shelf; Containers and aquaria (20-1000 L or < 1 m**2); Laboratory experiment; Porites lutea; Porites murrayensis; Single species; South Pacific; Tropical

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Abstract:

Ocean acidification typically reduces calcification in tropical marine corals but the mechanism for this process is not understood. We use skeletal boron geochemistry (B/Ca and δ11B) to reconstruct the calcification fluid DIC of corals cultured over both high and low seawater pCO2 (180, 400 and 750 μatm). We observe strong positive correlations between calcification fluid pH and concentrations of the DIC species potentially implicated in aragonite precipitation (be they CO32−, HCO3− or HCO3− + CO32−). Similarly, with the exception of one outlier, the fluid concentrations of precipitating DIC species are strongly positively correlated with coral calcification rate. Corals cultured at high seawater pCO2 usually have low calcification fluid pH and low concentrations of precipitating DIC, suggesting that a reduction in DIC substrate at the calcification site is responsible for decreased calcification. The outlier coral maintained high pHCF and DICCF at high seawater pCO2 but exhibited a reduced calcification rate indicating that the coral has a limited energy budget to support proton extrusion from the calcification fluid and meet other calcification demands. We find no evidence that increasing seawater pCO2 enhances diffusion of CO2 into the calcification site. Instead the overlying [CO2] available to diffuse into the calcification site appears broadly comparable between seawater pCO2 treatments, implying that metabolic activity (respiration and photosynthesis) generates a similar [CO2] in the vicinity of the calcification site regardless of seawater pCO2.

Keyword(s):

Acid-base regulation; Animalia; Benthic animals; Benthos; Biomass/Abundance/Elemental composition; Calcification/Dissolution; Cnidaria; Coast and continental shelf; Containers and aquaria (20-1000 L or < 1 m**2); Laboratory experiment; Porites lutea; Porites murrayensis; Single species; South Pacific; Tropical

Supplement to:

Allison, Nicola; Cole, Catherine; Hintz, Chris; Hintz, Ken; Rae, James; Finch, Adrian A (2018): The effect of ocean acidification on tropical coral calcification: Insights from calcification fluid DIC chemistry. Chemical Geology, 497, 162-169, https://doi.org/10.1016/j.chemgeo.2018.09.004

Documentation:

Gattuso, Jean-Pierre; Epitalon, Jean-Marie; Lavigne, Héloïse; Orr, James; Gentili, Bernard; Hagens, Mathilde; Hofmann, Andreas; Mueller, Jens-Daniel; Proye, Aurélien; Rae, James; Soetaert, Karline (2022): seacarb: seawater carbonate chemistry with R. R package version 3.3.1. https://cran.r-project.org/web/packages/seacarb/index.html

Project(s):

Ocean Acidification International Coordination Centre (OA-ICC)

Comment:

In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Gattuso et al, 2022) 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). The date of carbonate chemistry calculation by seacarb is 2023-05-31.

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Type of study	Study type		Allison, Nicola
2	Species, unique identification	Species UID		Allison, Nicola
3	Species, unique identification (URI)	Species UID (URI)		Allison, Nicola
4	Species, unique identification (Semantic URI)	Species UID (Semantic URI)		Allison, Nicola
5	Treatment: partial pressure of carbon dioxide	T:pCO2	µatm	Allison, Nicola
6	Genotype	Genotype		Allison, Nicola
7	Calcification rate of carbon	Calc rate C	µmol/cm²/day	Allison, Nicola
8	Calcification rate, standard deviation	Calc rate std dev	±	Allison, Nicola
9	Replicates	Repl	#	Allison, Nicola
10	δ11B	δ11B	‰ SRM	Allison, Nicola		Skeletal
11	δ11B, standard deviation	δ11B std dev	±	Allison, Nicola		Skeletal
12	Replicates	Repl	#	Allison, Nicola
13	Boron/Calcium ratio	B/Ca		Allison, Nicola		Skeletal
14	Boron/Calcium ratio, standard deviation	B/Ca std dev	±	Allison, Nicola		Skeletal
15	Replicates	Repl	#	Allison, Nicola
16	Calcifying fluid, pH	CF pH		Allison, Nicola		total scale
17	Calcifying fluid, pH, standard deviation	CF pH std dev	±	Allison, Nicola		total scale
18	Replicates	Repl	#	Allison, Nicola
19	Temperature, water	Temp	°C	Allison, Nicola
20	Temperature, water, standard deviation	Temp std dev	±	Allison, Nicola
21	Salinity	Sal		Allison, Nicola
22	Salinity, standard deviation	Sal std dev	±	Allison, Nicola
23	Alkalinity, total	AT	µmol/kg	Allison, Nicola
24	Alkalinity, total, standard deviation	AT std dev	±	Allison, Nicola
25	Replicates	Repl	#	Allison, Nicola
26	Carbon, inorganic, dissolved	DIC	µmol/kg	Allison, Nicola
27	Carbon, inorganic, dissolved, standard deviation	DIC std dev	±	Allison, Nicola
28	Replicates	Repl	#	Allison, Nicola
29	pH, total scale	pHT		Allison, Nicola	Calculated using CO2SYS	total scale
30	Boron	B	µmol/kg	Allison, Nicola		Seawater
31	Boron, standard deviation	B std dev	±	Allison, Nicola		Seawater
32	Replicates	Repl	#	Allison, Nicola
33	Calcium	Ca2+	mmol/kg	Allison, Nicola		Seawater
34	Calcium, standard deviation	Ca std dev	±	Allison, Nicola		Seawater
35	Replicates	Repl	#	Allison, Nicola
36	δ11B	δ11B	‰ SRM	Allison, Nicola		Seawater
37	δ11B, standard deviation	δ11B std dev	±	Allison, Nicola		Seawater
38	Replicates	Repl	#	Allison, Nicola
39	Carbonate system computation flag	CSC flag		Allison, Nicola	Calculated using seacarb after Nisumaa et al. (2010)
40	pH, total scale	pHT		Allison, Nicola	Calculated using seacarb after Nisumaa et al. (2010)	total scale
41	pH, standard deviation	pH std dev	±	Allison, Nicola	Calculated using seacarb after Orr et al. (2018)	total scale
42	Carbon dioxide	CO2	µmol/kg	Allison, Nicola	Calculated using seacarb after Nisumaa et al. (2010)
43	Carbon dioxide, standard deviation	CO2 std dev	±	Allison, Nicola	Calculated using seacarb after Orr et al. (2018)
44	Fugacity of carbon dioxide (water) at sea surface temperature (wet air)	fCO2water_SST_wet	µatm	Allison, Nicola	Calculated using seacarb after Nisumaa et al. (2010)
45	Fugacity of carbon dioxide in seawater, standard deviation	fCO2 std dev	±	Allison, Nicola	Calculated using seacarb after Orr et al. (2018)
46	Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)	pCO2water_SST_wet	µatm	Allison, Nicola	Calculated using seacarb after Nisumaa et al. (2010)
47	Partial pressure of carbon dioxide, standard deviation	pCO2 std dev	±	Allison, Nicola	Calculated using seacarb after Orr et al. (2018)
48	Bicarbonate ion	[HCO3]-	µmol/kg	Allison, Nicola	Calculated using seacarb after Nisumaa et al. (2010)
49	Bicarbonate ion, standard deviation	[HCO3]- std dev	±	Allison, Nicola	Calculated using seacarb after Orr et al. (2018)
50	Carbonate ion	[CO3]2-	µmol/kg	Allison, Nicola	Calculated using seacarb after Nisumaa et al. (2010)
51	Carbonate ion, standard deviation	[CO3]2- std dev	±	Allison, Nicola	Calculated using seacarb after Orr et al. (2018)
52	Aragonite saturation state	Omega Arg		Allison, Nicola	Calculated using seacarb after Nisumaa et al. (2010)
53	Aragonite saturation state, standard deviation	Omega Arg std dev	±	Allison, Nicola	Calculated using seacarb after Orr et al. (2018)
54	Calcite saturation state	Omega Cal		Allison, Nicola	Calculated using seacarb after Nisumaa et al. (2010)
55	Calcite saturation state, standard deviation	Omega Cal std dev	±	Allison, Nicola	Calculated using seacarb after Orr et al. (2018)

License:

Creative Commons Attribution 4.0 International (CC-BY-4.0)

Status:

Curation Level: Enhanced curation (CurationLevelC)

Size:

579 data points

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