Citation:

rspb.2014.1339

Name: Pacific-wide contrast highlights resistance of reef calcifiers to ocean acidification
Published: 2014-05-20
License: https://creativecommons.org/licenses/by/3.0/
Keywords: Animalia; Benthic animals; Benthos; Calcification/Dissolution; Chlorophyta; Cnidaria; Coast and continental shelf; Containers and aquaria (20-1000 L or < 1 m**2); Halimeda macroloba; Laboratory experiment; Macroalgae; North Pacific; Plantae; Pocillopora damicornis; Porites sp.; Porolithon onkodes; Rhodophyta; Single species; South Pacific; Temperate; Tropical

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Abstract:

Ocean acidification (OA) and its associated decline in calcium carbonate saturation states is one of the major threats that tropical coral reefs face this century. Previous studies of the effect of OA on coral reef calcifiers have described a wide variety of outcomes for studies using comparable partial pressure of CO2 (pCO2) ranges, suggesting that key questions remain unresolved. One unresolved hypothesis posits that heterogeneity in the response of reef calcifiers to high pCO2 is a result of regional-scale variation in the responses to OA. To test this hypothesis, we incubated two coral taxa (Pocillopora damicornis and massive Porites) and two calcified algae (Porolithon onkodes and Halimeda macroloba) under 400, 700 and 1000 µatm pCO2 levels in experiments in Moorea (French Polynesia), Hawaii (USA) and Okinawa (Japan), where environmental conditions differ. Both corals and H. macroloba were insensitive to OA at all three locations, while the effects of OA on P. onkodes were location-specific. In Moorea and Hawaii, calcification of P. onkodes was depressed by high pCO2, but for specimens in Okinawa, there was no effect of OA. Using a study of large geographical scale, we show that resistance to OA of some reef species is a constitutive character expressed across the Pacific.

Keyword(s):

Animalia; Benthic animals; Benthos; Calcification/Dissolution; Chlorophyta; Cnidaria; Coast and continental shelf; Containers and aquaria (20-1000 L or < 1 m**2); Halimeda macroloba; Laboratory experiment; Macroalgae; North Pacific; Plantae; Pocillopora damicornis; Porites sp.; Porolithon onkodes; Rhodophyta; Single species; South Pacific; Temperate; Tropical

Further details:

Lavigne, Héloïse; Epitalon, Jean-Marie; Gattuso, Jean-Pierre (2014): seacarb: seawater carbonate chemistry with R. R package version 3.0. 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 (Lavigne et al, 2014) 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 2014-05-19.

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Location	Location		Comeau, Steeve
2	Species	Species		Comeau, Steeve
3	Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)	pCO2water_SST_wet	µatm	Comeau, Steeve		target
4	Alkalinity, total	AT	µmol/kg	Comeau, Steeve	Potentiometric titration
5	pH	pH		Comeau, Steeve	Potentiometric	total scale
6	Temperature, water	Temp	°C	Comeau, Steeve
7	Salinity	Sal		Comeau, Steeve
8	Calcification rate of calcium carbonate	Calc rate CaCO3	mg/cm²/day	Comeau, Steeve	Buoyant weighing technique according to Davies (1989)	normalized by surface
9	Calcification rate of calcium carbonate	Calc rate CaCO3	mg/g/day	Comeau, Steeve	Buoyant weighing technique according to Davies (1989)	normalized by biomass (tissue dry weight)
10	Date/time start	Date/time start		Comeau, Steeve		experiment date
11	Date/time end	Date/time end		Comeau, Steeve		experiment date
12	Carbonate system computation flag	CSC flag		Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
13	Carbon dioxide	CO2	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
14	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)
15	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)
16	Bicarbonate ion	[HCO3]-	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
17	Carbonate ion	[CO3]2-	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
18	Carbon, inorganic, dissolved	DIC	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
19	Aragonite saturation state	Omega Arg		Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
20	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:

8324 data points

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