Citation:

s41598-017-08003-z

Name: Seawater carbonate chemistry and coral calcifying fluid pH and calcification
Published: 2017
License: https://creativecommons.org/licenses/by/3.0/
Keywords: Acid-base regulation; Acropora yongei; 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); Indian Ocean; Indian Ocean; Laboratory experiment; Pocillopora damicornis; Single species; Temperate

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Abstract:

Evaluating the factors responsible for differing species-specific sensitivities to declining seawater pH is central to understanding the mechanisms via which ocean acidification (OA) affects coral calcification. We report here the results of an experiment comparing the responses of the coral Acropora yongei and Pocillopora damicornis to differing pH levels (8.09, 7.81, and 7.63) over an 8-week period. Calcification of A. youngei was reduced by 35% at pH 7.63, while calcification of P. damicornis was unaffected. The pH in the calcifying fluid (pHcf) was determined using delta 11B systematics, and for both species pHcf declined slightly with seawater pH, with the decrease being more pronounced in P. damicornis. The dissolved inorganic carbon concentration at the site of calcification (DICcf) was estimated using geochemical proxies (B/Ca and delta 11B) and found to be double that of seawater DIC, and increased in both species as seawater pH decreased. As a consequence, the decline of the saturation state at the site of calcification (Ωcf) with OA was partially moderated by the DICcf increase. These results highlight that while pHcf, DICcf and Ωcf are important in the mineralization process, some corals are able to maintain their calcification rates despite shifts in their calcifying fluid carbonate chemistry.

Keyword(s):

Acid-base regulation; Acropora yongei; 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); Indian Ocean; Indian Ocean; Laboratory experiment; Pocillopora damicornis; Single species; Temperate

Further details:

Gattuso, Jean-Pierre; Epitalon, Jean-Marie; Lavigne, Héloïse; Orr, James C; Gentili, Bernard; Proye, Aurélien; Soetaert, Karline; Rae, James (2016): seacarb: seawater carbonate chemistry with R. R package version 3.1. https://cran.r-project.org/package=seacarb

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, 2016) 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 2018-07-12.

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Type	Type		Comeau, Steeve		study
2	Species	Species		Comeau, Steeve
3	Registration number of species	Reg spec no		Comeau, Steeve
4	Uniform resource locator/link to reference	URL ref		Comeau, Steeve		WoRMS Aphia ID
5	Treatment	Treat		Comeau, Steeve
6	δ11B	δ11B	‰ SRM	Comeau, Steeve
7	Calcifying fluid, pH	CF pH		Comeau, Steeve
8	Boron/Calcium ratio	B/Ca	µmol/mol	Comeau, Steeve
9	Calcifying fluid, dissolved inorganic carbon	CF DIC	µmol/kg	Comeau, Steeve
10	Calcification rate of calcium carbonate	Calc rate CaCO3	mg/cm²/day	Comeau, Steeve
11	Salinity	Sal		Comeau, Steeve
12	pH	pH		Comeau, Steeve	Potentiometric	total scale
13	pH, standard error	pH std e	±	Comeau, Steeve	Potentiometric	total scale
14	Alkalinity, total	AT	µmol/kg	Comeau, Steeve	Potentiometric titration
15	Alkalinity, total, standard error	AT std e	±	Comeau, Steeve	Potentiometric titration
16	Carbon, inorganic, dissolved	DIC	µmol/kg	Comeau, Steeve	Calculated using seacarb
17	Carbon, inorganic, dissolved, standard error	DIC std e	±	Comeau, Steeve	Calculated using seacarb
18	Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)	pCO2water_SST_wet	µatm	Comeau, Steeve	Calculated using seacarb
19	Partial pressure of carbon dioxide (water) at sea surface temperature (wet air), standard error	pCO2water_SST_wet std e	±	Comeau, Steeve	Calculated using seacarb
20	Aragonite saturation state	Omega Arg		Comeau, Steeve	Calculated using seacarb
21	Aragonite saturation state, standard error	Omega Arg std e	±	Comeau, Steeve	Calculated using seacarb
22	Temperature, water	Temp	°C	Comeau, Steeve
23	Carbonate system computation flag	CSC flag		Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
24	Carbon dioxide	CO2	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
25	Fugacity of carbon dioxide (water) at sea surface temperature (wet air)	fCO2water_SST_wet	µatm	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
26	Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)	pCO2water_SST_wet	µatm	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
27	Bicarbonate ion	[HCO3]-	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
28	Carbonate ion	[CO3]2-	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
29	Carbon, inorganic, dissolved	DIC	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
30	Aragonite saturation state	Omega Arg		Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
31	Calcite saturation state	Omega Cal		Yang, Yan	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:

2201 data points

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