Citation:

lo.2011.56.6.2402

Name: Seawater carbonate chemistry, biomass and calcification of Porites spp. corals during experiments, 2011
Creator: Peter J Edmunds
Published: 2011-12-13
License: https://creativecommons.org/licenses/by/3.0/
Keywords: 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 sp.; Single species; South Pacific; Temperature; Tropical

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Abstract:

I tested the hypothesis that the effects of high pCO2 and temperature on massive Porites spp. (Scleractinia) are modified by heterotrophic feeding (zooplanktivory). Small colonies of massive Porites spp. from the back reef of Moorea, French Polynesia, were incubated for 1 month under combinations of temperature (29.3°C vs. 25.6°C), pCO2 (41.6 vs. 81.5 Pa), and feeding regimes (none vs. ad libitum access to live Artemia spp.), with the response assessed using calcification and biomass. Area-normalized calcification was unaffected by pCO2, temperature, and the interaction between the two, although it increased 40% with feeding. Biomass increased 35% with feeding and tended to be higher at 25.6°C compared to 29.3°C, and as a result, biomass-normalized calcification statistically was unaffected by feeding, but was depressed 12-17% by high pCO2, with the effect accentuated at 25.6°C. These results show that massive Porites spp. has the capacity to resist the effects on calcification of 1 month exposure to 81.5 Pa pCO2 through heterotrophy and changes in biomass. Area-normalized calcification is sustained at high pCO2 by a greater biomass with a reduced biomass-normalized rate of calcification. This mechanism may play a role in determining the extent to which corals can resist the long-term effects of ocean acidification.

Keyword(s):

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 sp.; Single species; South Pacific; Temperature; 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		Edmunds, Peter J
2	Identification	ID		Edmunds, Peter J
3	Salinity	Sal		Edmunds, Peter J	YSI 3100 Conductivity Meter
4	Salinity, standard error	Sal std e	±	Edmunds, Peter J
5	Temperature, water	Temp	°C	Edmunds, Peter J	Digital thermometer (Fisher Scientific)
6	Replicates	Repl	#	Edmunds, Peter J		T, per treatment
7	Radiation, photosynthetically active	PAR	µmol/m²/s	Edmunds, Peter J	PAR sensor LI-1400, LI-COR Inc.
8	Radiation, photosynthetically active, standard deviation	PAR std dev	±	Edmunds, Peter J
9	pH	pH		Edmunds, Peter J	pH meter (Mettler Toledo, USA)	NBS scale
10	Replicates	Repl	#	Edmunds, Peter J		pH (NBS scale), per treatment
11	Alkalinity, total	AT	µmol/kg	Edmunds, Peter J	T50 Titrator (Mettler Toledo, Port Melbourne, Australia)
12	Alkalinity, total, standard error	AT std e	±	Edmunds, Peter J
13	Replicates	Repl	#	Edmunds, Peter J		TA, per treatment
14	Carbon dioxide, partial pressure	pCO2	Pa	Edmunds, Peter J	Calculated using CO2SYS
15	Partial pressure of carbon dioxide (water) at sea surface temperature (wet air), standard error	pCO2water_SST_wet std e	±	Edmunds, Peter J
16	Replicates	Repl	#	Edmunds, Peter J		pCO2, per treatment
17	Aragonite saturation state	Omega Arg		Edmunds, Peter J	Calculated using CO2SYS
18	Aragonite saturation state, standard deviation	Omega Arg std dev	±	Edmunds, Peter J
19	Replicates	Repl	#	Edmunds, Peter J		Aragonite, per treatment
20	Carbonate system computation flag	CSC flag		Nisumaa, Anne-Marin	Calculated using seacarb after Nisumaa et al. (2010)
21	pH	pH		Nisumaa, Anne-Marin	Calculated using seacarb after Nisumaa et al. (2010)	Total scale
22	Carbon dioxide	CO2	µmol/kg	Nisumaa, Anne-Marin	Calculated using seacarb after Nisumaa et al. (2010)
23	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)
24	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)
25	Bicarbonate ion	[HCO3]-	µmol/kg	Nisumaa, Anne-Marin	Calculated using seacarb after Nisumaa et al. (2010)
26	Carbonate ion	[CO3]2-	µmol/kg	Nisumaa, Anne-Marin	Calculated using seacarb after Nisumaa et al. (2010)
27	Carbon, inorganic, dissolved	DIC	µmol/kg	Nisumaa, Anne-Marin	Calculated using seacarb after Nisumaa et al. (2010)
28	Aragonite saturation state	Omega Arg		Nisumaa, Anne-Marin	Calculated using seacarb after Nisumaa et al. (2010)
29	Calcite saturation state	Omega Cal		Nisumaa, Anne-Marin	Calculated using seacarb after Nisumaa et al. (2010)
30	Porites spp. biomass	Porites spp. biom	mg/cm²	Edmunds, Peter J
31	Sample ID	Sample ID		Edmunds, Peter J
32	Porites spp. heterotrophy	Porites spp. het		Edmunds, Peter J
33	Calcification rate	Calc rate	mg/cm²/day	Edmunds, Peter J	Buoyant weighing technique according to Davies (1989)	Normalized to surface
34	Calcification rate of calcium carbonate	Calc rate CaCO3	mg/g/day	Edmunds, Peter J	Buoyant weighing technique according to Davies (1989)	Normalized to biomass
35	Porites spp., surface area	Porites spp. SA	cm²	Edmunds, Peter J	Aluminium foil method (Marsh, 1970)

License:

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

Status:

Curation Level: Enhanced curation (CurationLevelC)

Size:

2728 data points

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