Citation:

BBLv225n2p92

Name: In Situ effects of low pH and elevated HCO3 on juvenile massive Porites spp. in Moorea, French Polynesia
Published: 2013
License: https://creativecommons.org/licenses/by/3.0/
Keywords: Animalia; Benthic animals; Benthos; Bottles or small containers/Aquaria (<20 L); Calcification/Dissolution; Cnidaria; Coast and continental shelf; Field experiment; Porites sp.; Respiration; Single species; South Pacific; Tropical

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Abstract:

Juvenile colonies of massive Porites spp. were exposed to manipulated pH and bicarbonate ([HCO3-]) in situ to test the hypothesis that ocean acidification (OA) does not affect respiration and calcification. Incubations lasted 28 h and exposed corals to ambient temperature and light with ecologically relevant water motion. Three treatments were applied: (1) ambient conditions of pH 8.04 and 1751 µmol HCO3- kg(-1) (Treatment 1), (2) pCO2-induced ocean acidification of pH 7.73 and 2011 µmol HCO3- kg(-1) (Treatment 2), and (3) pCO2 and HCO3--enriched seawater of pH 7.69 and 2730 µmol HCO3- kg(-1) (Treatment 3). The third treatment providing elevated [HCO3-] was used to test for stimulatory effects of dissolved inorganic carbon on calcification under low pH and low saturation of aragonite (Omega arag), but it does not reflect conditions expected to occur under CO2-driven OA. Calcification of juvenile massive Porites spp. was affected by treatments, with an 81% elevation in Treatment 3 versus Treatment 1, but no difference between Treatments 1 and 2; respiration and the metabolic expenditure concurrent with calcification remained unaffected. These findings indicate that juvenile massive Porites spp. are resistant to short exposures to OA in situ, and separately, that they can increase calcification at low pH and low Omega arag if [HCO3-] is elevated. Juvenile Porites spp. may therefore be limited by dissolved inorganic carbon under ambient pCO2 conditions

Keyword(s):

Animalia; Benthic animals; Benthos; Bottles or small containers/Aquaria (<20 L); Calcification/Dissolution; Cnidaria; Coast and continental shelf; Field experiment; Porites sp.; Respiration; Single species; South Pacific; Tropical

Further details:

Lavigne, Héloïse; Epitalon, Jean-Marie; Gattuso, Jean-Pierre (2014): seacarb: seawater carbonate chemistry with R. R package version 3.0 [webpage]. 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 2014-07-09.

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Species	Species		Wall, Christopher B
2	Figure	Fig		Wall, Christopher B
3	Date	Date		Wall, Christopher B
4	Treatment	Treat		Wall, Christopher B		1=ambient pH, ambient HCO3-, 2=low pH, high HCO3-, 3=low pH, very high HCO3-
5	Replicate	Repl		Wall, Christopher B
6	Respiration rate, oxygen	Resp O2	µmol/cm²/h	Wall, Christopher B
7	Calcification rate of calcium carbonate	Calc rate CaCO3	µg/cm²/h	Wall, Christopher B
8	Metabolic expenditure	Met exp	J/g	Wall, Christopher B		concurrent with calcification
9	pH	pH		Wall, Christopher B	Potentiometric	total scale
10	Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)	pCO2water_SST_wet	Pa	Wall, Christopher B	Calculated using seacarb
11	Alkalinity, total	AT	µmol/kg	Wall, Christopher B	Potentiometric titration
12	Bicarbonate ion	[HCO3]-	µmol/kg	Wall, Christopher B	Calculated using seacarb
13	Carbonate ion	[CO3]2-	µmol/kg	Wall, Christopher B	Calculated using seacarb
14	Carbon, inorganic, dissolved	DIC	µmol/kg	Wall, Christopher B	Calculated using seacarb
15	Aragonite saturation state	Omega Arg		Wall, Christopher B	Calculated using seacarb
16	Salinity	Sal		Wall, Christopher B
17	Temperature, water	Temp	°C	Wall, Christopher B
18	Carbonate system computation flag	CSC flag		Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
19	Carbon dioxide	CO2	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
20	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)
21	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)
22	Bicarbonate ion	[HCO3]-	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
23	Carbonate ion	[CO3]2-	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
24	Carbon, inorganic, dissolved	DIC	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
25	Aragonite saturation state	Omega Arg		Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
26	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:

464 data points

Data

Download dataset as tab-delimited text — use the following character encoding:

1 Species	2 Fig	3 Date	4 Treat (1=ambient pH, ambient HCO3-, ...)	5 Repl	6 Resp O2 [µmol/cm²/h]	7 Calc rate CaCO3 [µg/cm²/h]	8 Met exp [J/g] (concurrent with calcification)	9 pH (total scale, Potentiometric)	10 pCO2water_SST_wet [Pa] (Calculated using seacarb)	11 AT [µmol/kg] (Potentiometric titration)	12 [HCO3]- [µmol/kg] (Calculated using seacarb)	13 [CO3]2- [µmol/kg] (Calculated using seacarb)	14 DIC [µmol/kg] (Calculated using seacarb)	15 Omega Arg (Calculated using seacarb)	16 Sal	17 Temp [°C]	18 CSC flag (Calculated using seacarb afte...)	19 CO2 [µmol/kg] (Calculated using seacarb afte...)	20 pCO2water_SST_wet [µatm] (Calculated using seacarb afte...)	21 fCO2water_SST_wet [µatm] (Calculated using seacarb afte...)	22 [HCO3]- [µmol/kg] (Calculated using seacarb afte...)	23 [CO3]2- [µmol/kg] (Calculated using seacarb afte...)	24 DIC [µmol/kg] (Calculated using seacarb afte...)	25 Omega Arg (Calculated using seacarb afte...)	26 Omega Cal (Calculated using seacarb afte...)
Porites spp. (coral)	3	2012-02-05	1	1	-0.310	82.64	1650	8.016	43.6	2353	1752	243	2006	3.93	36.0	30.2	8	11	432	431	1756	243	2010	3.94	5.86
Porites spp. (coral)	3	2012-02-05	1	2	-0.259	38.95	2926	8.016	43.6	2353	1752	243	2006	3.93	36.0	30.2	8	11	432	431	1756	243	2010	3.94	5.86
Porites spp. (coral)	3	2012-02-05	2	1	-0.297	34.12	3830	7.680	110.4	2363	2038	133	2197	2.15	36.0	30.7	8	27	1090	1087	2039	133	2199	2.15	3.20
Porites spp. (coral)	3	2012-02-05	2	2	-0.462	36.51	5568	7.680	110.4	2363	2038	133	2197	2.15	36.0	30.7	8	27	1090	1087	2039	133	2199	2.15	3.20
Porites spp. (coral)	3	2012-02-05	3	1	-0.343	75.89	1989	7.629	166.4	3109	2743	156	2940	2.52	36.0	30.2	8	41	1645	1641	2745	156	2942	2.52	3.76
Porites spp. (coral)	3	2012-02-05	3	2	-0.347	142.54	1071	7.629	166.4	3109	2743	156	2940	2.52	36.0	30.2	8	41	1645	1641	2745	156	2942	2.52	3.76
Porites spp. (coral)	3	2012-02-07	1	1	-0.316	23.00	6045	8.056	39.4	2363	1752	247	2009	3.96	35.9	28.2	8	10	390	388	1756	248	2014	3.97	5.95
Porites spp. (coral)	3	2012-02-07	1	2	-0.540	76.92	3089	8.056	39.4	2363	1752	247	2009	3.96	35.9	28.2	8	10	390	388	1756	248	2014	3.97	5.95
Porites spp. (coral)	3	2012-02-07	2	1	-0.232	37.96	2689	7.887	63.2	2354	1903	183	2102	2.94	35.9	28.4	8	16	624	623	1905	183	2105	2.94	4.41
Porites spp. (coral)	3	2012-02-07	2	2	-0.507	72.36	3083	7.887	63.2	2354	1903	183	2102	2.94	35.9	28.4	8	16	624	623	1905	183	2105	2.94	4.41
Porites spp. (coral)	3	2012-02-07	3	1	-0.412			7.798	108.2	3139	2664	203	2895	3.24	35.9	27.6	8	28	1068	1064	2665	203	2897	3.24	4.87
Porites spp. (coral)	3	2012-02-07	3	2	-0.355			7.798	108.2	3139	2664	203	2895	3.24	35.9	27.6	8	28	1068	1064	2665	203	2897	3.24	4.87
Porites spp. (coral)	3	2012-02-09	1	1	-0.643	62.36	4537	8.033	42.2	2365	1777	239	2026	3.82	35.9	28.3	8	11	417	415	1780	239	2029	3.83	5.74
Porites spp. (coral)	3	2012-02-09	1	2	-0.507	123.63	1804	8.033	42.2	2365	1777	239	2026	3.82	35.9	28.3	8	11	417	415	1780	239	2029	3.83	5.74
Porites spp. (coral)	3	2012-02-09	2	1	-0.494	85.24	2550	7.812	77.7	2361	1986	152	2159	2.42	35.9	26.9	8	21	768	766	1988	153	2161	2.43	3.65
Porites spp. (coral)	3	2012-02-09	2	2	-0.325	46.94	3046	7.812	77.7	2361	1986	152	2159	2.42	35.9	26.9	8	21	768	766	1988	153	2161	2.43	3.65
Porites spp. (coral)	3	2012-02-09	3	1	-0.672	158.71	1863	7.737	125.4	3102	2674	182	2888	2.91	36.1	28.3	8	32	1238	1234	2676	183	2890	2.92	4.38
Porites spp. (coral)	3	2012-02-09	3	2	-0.599	115.03	2291	7.737	125.4	3102	2674	182	2888	2.91	36.1	28.3	8	32	1238	1234	2676	183	2890	2.92	4.38