Citation:

jeb.127159

Name: Effects of elevated pCO2 and feeding on net calcification and energy budget of the Mediterranean cold-water coral Madrepora oculata
Published: 2016-12-13
License: https://creativecommons.org/licenses/by/3.0/
Keywords: Animalia; Benthic animals; Benthos; Bottles or small containers/Aquaria (<20 L); Calcification/Dissolution; Cnidaria; Deep-sea; Growth/Morphology; Laboratory experiment; Madrepora oculata; Mediterranean Sea; Other; Respiration; Single species; Temperate

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Abstract:

Ocean acidification is a major threat to calcifying marine organisms such as deep-sea cold-water corals (CWC), but related knowledge is scarce. The aragonite saturation threshold (Omega a) for calcification, respiration, and organic matter fluxes was investigated experimentally in the Mediterranean Madrepora oculata (Linnaeus 1758). Over 10 weeks, colonies were maintained under two feeding regimes (uptake of 36.75 and 7.46 µmol C/polyp/week) and exposed in 2 week intervals to a consecutively changing air-CO2 mix (pCO2) of 400, 1600, 800, 2000 and 400 ppm. There was a significant effect of feeding on calcification at initial ambient pCO2, while at consecutive pCO2 treatments feeding had no effect on calcification. Respiration was not significantly affected by feeding or pCO2 levels. Coral skeletons started to dissolve at an average Omega a threshold of 0.92, but recovered and started to calcify again at Omega a> or =1. The surplus energy required to counteract dissolution at elevated pCO2 (> or =1600µatm) was twice that at ambient pCO2. Yet, feeding had no mitigating effect at increasing pCO2 levels. This could be due to the fact that the energy required for calcification is a small fraction (1 to 3%) of the total metabolic energy demand and corals even under low food conditions might therefore still be able to allocate this small portion of energy to calcification. The response and resistance to ocean acidification is consequently not controlled by feeding in this species, but more likely by chemical reaction at the site of calcification and exchange processes between the calicoblastic layer and ambient seawater.

Keyword(s):

Animalia; Benthic animals; Benthos; Bottles or small containers/Aquaria (<20 L); Calcification/Dissolution; Cnidaria; Deep-sea; Growth/Morphology; Laboratory experiment; Madrepora oculata; Mediterranean Sea; Other; Respiration; 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)

Coverage:

Latitude: 41.287780 * Longitude: 17.277220

Date/Time Start: 2010-03-05T00:00:00 * Date/Time End: 2010-03-05T00:00:00

Event(s):

Bari_Canyon_OA * Latitude: 41.287780 * Longitude: 17.277220 * Date/Time: 2010-03-05T00:00:00 * Method/Device: Experiment (EXP)

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 is 2016-12-12.

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Type	Type		Maier, Cornelia		study
2	Species	Species		Maier, Cornelia
3	Registration number of species	Reg spec no		Maier, Cornelia
4	Uniform resource locator/link to reference	URL ref		Maier, Cornelia		WoRMS Aphia ID
5	Sample code/label	Sample label		Maier, Cornelia
6	Sample type	Samp type		Maier, Cornelia
7	Coral	Coral		Maier, Cornelia
8	Treatment	Treat		Maier, Cornelia		repeated
9	Feeding mode	Feeding m		Maier, Cornelia
10	Experiment	Exp		Maier, Cornelia		Wo-Tag Incubation
11	Sampling date	Sampling date		Maier, Cornelia
12	Temperature, water	Temp	°C	Maier, Cornelia
13	Salinity	Sal		Maier, Cornelia
14	Incubation duration	Inc dur	h	Maier, Cornelia
15	Volume	Vol	ml	Maier, Cornelia		incubation
16	Dry mass	Dry m	g	Maier, Cornelia
17	Polyp number	Polyp no	#	Maier, Cornelia
18	Area	Area	cm²	Maier, Cornelia		1
19	Area	Area	cm²	Maier, Cornelia		2
20	Area	Area	cm²	Maier, Cornelia		PI
21	Area	Area	cm²	Maier, Cornelia		per polyp
22	Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)	pCO2water_SST_wet	ppmv	Maier, Cornelia
23	Gas, flux	Gas flux	ml/min	Maier, Cornelia		air
24	Gas, flux	Gas flux	ml/min	Maier, Cornelia		CO2
25	Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)	pCO2water_SST_wet	ppmv	Maier, Cornelia
26	Sampling date	Sampling date		Maier, Cornelia
27	pH	pH		Maier, Cornelia		NBS scale, Aquastar
28	pH	pH		Maier, Cornelia		total scale
29	Alkalinity, total	AT	µmol/kg	Maier, Cornelia
30	Calcification rate of calcium carbonate	Calc rate CaCO3	µmol/g/h	Maier, Cornelia
31	Calcification rate	Calc rate	%/day	Maier, Cornelia
32	Carbon, inorganic, dissolved	DIC	µmol/kg	Maier, Cornelia
33	Carbonate system computation flag	CSC flag		Maier, Cornelia	Calculated using seacarb
34	Pressure	P	bar	Maier, Cornelia		water
35	pH	pH		Maier, Cornelia	Calculated using seacarb	total scale
36	Carbon dioxide	CO2	µmol/kg	Maier, Cornelia	Calculated using seacarb
37	Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)	pCO2water_SST_wet	µatm	Maier, Cornelia	Calculated using seacarb
38	Fugacity of carbon dioxide (water) at sea surface temperature (wet air)	fCO2water_SST_wet	µatm	Maier, Cornelia	Calculated using seacarb
39	Bicarbonate ion	[HCO3]-	µmol/kg	Maier, Cornelia	Calculated using seacarb
40	Carbonate ion	[CO3]2-	µmol/kg	Maier, Cornelia	Calculated using seacarb
41	Carbon, inorganic, dissolved	DIC	µmol/kg	Maier, Cornelia	Calculated using seacarb
42	Alkalinity, total	AT	µmol/kg	Maier, Cornelia	Calculated using seacarb
43	Aragonite saturation state	Omega Arg		Maier, Cornelia	Calculated using seacarb
44	Calcite saturation state	Omega Cal		Maier, Cornelia	Calculated using seacarb
45	Carbon, organic, total, change rate	TOC change	µmol/g/h	Maier, Cornelia
46	Respiration rate, oxygen	Resp O2	µmol/g/h	Maier, Cornelia
47	Respiratory quotient	RQ		Maier, Cornelia		organic carbon taken up by prey capture
48	Particulate organic carbon uptake rate	POC upt	µmol/g/h	Maier, Cornelia		carbon demand for respiration in relation to organic carbon taken up by prey capture
49	Percentage	Perc	%	Maier, Cornelia
50	Carbonate system computation flag	CSC flag		Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
51	pH	pH		Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)	total scale
52	Carbon dioxide	CO2	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
53	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)
54	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)
55	Bicarbonate ion	[HCO3]-	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
56	Carbonate ion	[CO3]2-	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
57	Carbon, inorganic, dissolved	DIC	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
58	Alkalinity, total	AT	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
59	Aragonite saturation state	Omega Arg		Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
60	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:

11229 data points

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