Citation:

j.1529-8817.2011.01085.x

Name: Seawater carbonate chemistry, gross photosynthesis and metabolically induced rate of pH change during experiments with macroalgae, 2012
Published: 2012-02-10
License: https://creativecommons.org/licenses/by/3.0/
Keywords: Benthos; Bottles or small containers/Aquaria (<20 L); Chlorophyta; Chromista; Coast and continental shelf; Corallina officinalis; Laboratory experiment; Macroalgae; Ochrophyta; Plantae; Primary production/Photosynthesis; Rhodophyllis gunnii; Rhodophyta; Schizoseris sp.; Single species; South Pacific; Temperate; Ulva sp.; Undaria pinnatifida

Always quote citation above when using data! You can download the citation in several formats below.

RIS Citation BibTeX Citation Text Citation Facebook Twitter

Abstract:

Ocean acidification (OA) is a reduction in oceanic pH due to increased absorption of anthropogenically produced CO2. This change alters the seawater concentrations of inorganic carbon species that are utilized by macroalgae for photosynthesis and calcification: CO2 and HCO3 increase; CO32 decreases. Two common methods of experimentally reducing seawater pH differentially alter other aspects of carbonate chemistry: the addition of CO2 gas mimics changes predicted due to OA, while the addition of HCl results in a comparatively lower [HCO3]. We measured the short-term photosynthetic responses of five macroalgal species with various carbon-use strategies in one of three seawater pH treatments: pH 7.5 lowered by bubbling CO2 gas, pH 7.5 lowered by HCl, and ambient pH 7.9. There was no difference in photosynthetic rates between the CO2, HCl, or pH 7.9 treatments for any of the species examined. However, the ability of macroalgae to raise the pH of the surrounding seawater through carbon uptake was greatest in the pH 7.5 treatments. Modeling of pH change due to carbon assimilation indicated that macroalgal species that could utilize HCO3 increased their use of CO2 in the pH 7.5 treatments compared to pH 7.9 treatments. Species only capable of using CO2 did so exclusively in all treatments. Although CO2 is not likely to be limiting for photosynthesis for the macroalgal species examined, the diffusive uptake of CO2 is less energetically expensive than active HCO3 uptake, and so HCO3-using macroalgae may benefit in future seawater with elevated CO2.

Keyword(s):

Benthos; Bottles or small containers/Aquaria (<20 L); Chlorophyta; Chromista; Coast and continental shelf; Corallina officinalis; Laboratory experiment; Macroalgae; Ochrophyta; Plantae; Primary production/Photosynthesis; Rhodophyllis gunnii; Rhodophyta; Schizoseris sp.; Single species; South Pacific; Temperate; Ulva sp.; Undaria pinnatifida

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		Cornwall, Christopher Edward
2	Salinity	Sal		Cornwall, Christopher Edward
3	Temperature, water	Temp	°C	Cornwall, Christopher Edward
4	pH	pH		Cornwall, Christopher Edward	pH meter (Orion)	NBS scale, H+ ion concentraion in µmol/l
5	pH, standard error	pH std e	±	Cornwall, Christopher Edward
6	Alkalinity, total	AT	mmol(eq)/l	Cornwall, Christopher Edward	Titration
7	Alkalinity, total, standard error	AT std e	±	Cornwall, Christopher Edward
8	Carbon, inorganic, dissolved	DIC	µmol/l	Cornwall, Christopher Edward	Calculated using SWCO2 (Hunter, 2007)
9	Carbon, inorganic, dissolved, standard error	DIC std e	±	Cornwall, Christopher Edward
10	Carbon dioxide, total	TCO2	µmol/l	Cornwall, Christopher Edward	Calculated using SWCO2 (Hunter, 2007)
11	Carbon dioxide, standard error	CO2 std e	±	Cornwall, Christopher Edward
12	Bicarbonate	[HCO3]-	mmol/l	Cornwall, Christopher Edward	Calculated using SWCO2 (Hunter, 2007)
13	Bicarbonate ion, standard error	[HCO3]- std e	±	Cornwall, Christopher Edward
14	Carbonate ion	[CO3]2-	µmol/l	Cornwall, Christopher Edward	Calculated using SWCO2 (Hunter, 2007)
15	Carbonate ion, standard error	[CO3]2- std e	±	Cornwall, Christopher Edward
16	Species	Species		Cornwall, Christopher Edward
17	Gross photosynthesis rate, oxygen	PG O2	µmol/g/s	Cornwall, Christopher Edward	Calculated, see reference(s)
18	Gross photosynthesis rate, oxygen, standard error	PG O2 std e	±	Cornwall, Christopher Edward
19	Metabolically induced rate of pH change	pH change	units g DW/t/h	Cornwall, Christopher Edward
20	Metabolically induced rate of pH change, standard error	pH change std e	±	Cornwall, Christopher Edward
21	pH	pH		Cornwall, Christopher Edward		NBS scale, H+ ion concentration in µmol/kg
22	Carbonate system computation flag	CSC flag		Nisumaa, Anne-Marin	Calculated using seacarb after Nisumaa et al. (2010)
23	pH	pH		Nisumaa, Anne-Marin	Calculated using seacarb after Nisumaa et al. (2010)	Total scale, H+ ion concentration in µmol/kg
24	Carbon dioxide	CO2	µmol/kg	Nisumaa, Anne-Marin	Calculated using seacarb after Nisumaa et al. (2010)
25	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)
26	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)
27	Bicarbonate ion	[HCO3]-	µmol/kg	Nisumaa, Anne-Marin	Calculated using seacarb after Nisumaa et al. (2010)
28	Carbonate ion	[CO3]2-	µmol/kg	Nisumaa, Anne-Marin	Calculated using seacarb after Nisumaa et al. (2010)
29	Alkalinity, total	AT	µmol/kg	Cornwall, Christopher Edward	Calculated
30	Carbon, inorganic, dissolved	DIC	µmol/kg	Cornwall, Christopher Edward	Calculated using CO2SYS
31	Aragonite saturation state	Omega Arg		Nisumaa, Anne-Marin	Calculated using seacarb after Nisumaa et al. (2010)
32	Calcite saturation state	Omega Cal		Nisumaa, Anne-Marin	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:

480 data points

Data

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

1 Exp treat	2 Sal	3 Temp [°C]	4 pH (NBS scale, H+ ion concentraio...)	5 pH std e [±]	6 AT [mmol(eq)/l] (Titration)	7 AT std e [±]	8 DIC [µmol/l] (Calculated using SWCO2 (Hunte...)	9 DIC std e [±]	10 TCO2 [µmol/l] (Calculated using SWCO2 (Hunte...)	11 CO2 std e [±]	12 [HCO3]- [mmol/l] (Calculated using SWCO2 (Hunte...)	13 [HCO3]- std e [±]	14 [CO3]2- [µmol/l] (Calculated using SWCO2 (Hunte...)	15 [CO3]2- std e [±]	16 Species	17 PG O2 [µmol/g/s] (Calculated, see reference(s))	18 PG O2 std e [±]	19 pH change [units g DW/t/h]	20 pH change std e [±]	21 pH (NBS scale, H+ ion concentrati...)	22 CSC flag (Calculated using seacarb afte...)	23 pH (Total scale, H+ ion concentra...)	24 CO2 [µmol/kg] (Calculated using seacarb afte...)	25 pCO2water_SST_wet [µatm] (Calculated using seacarb afte...)	26 fCO2water_SST_wet [µatm] (Calculated using seacarb afte...)	27 [HCO3]- [µmol/kg] (Calculated using seacarb afte...)	28 [CO3]2- [µmol/kg] (Calculated using seacarb afte...)	29 AT [µmol/kg] (Calculated)	30 DIC [µmol/kg] (Calculated using CO2SYS)	31 Omega Arg (Calculated using seacarb afte...)	32 Omega Cal (Calculated using seacarb afte...)
CO2-modified	32.5	12	7.51	0.01	2.271	0.000	2304	3	83.62	1.72	2186	2	34.50	0.64	Corallina officinalis	0.00839	0.01879	0.06001	0.02608	7.33	26	7.22	125.36	3016.760	3005.590	2161.100	22.230	2308.7	2216.4	0.34	0.54
Control	32.5	12	7.91	0.01	2.271	0.000	2184	2	31.99	0.61	2071	3	80.81	1.21	Corallina officinalis	0.00770	0.00076	0.01026	0.00650	7.72	26	7.61	49.22	1184.490	1180.100	2085.260	52.720	2187.2	2216.4	0.81	1.27
HCl-modified	32.5	12	7.52	0.01	2.156	0.003	2184	2	78.21	1.60	2073	1	33.21	0.70	Corallina officinalis	0.00955	0.00096	0.06126	0.04128	7.34	26	7.23	116.27	2797.970	2787.610	2049.960	21.570	2187.8	2104.1	0.33	0.52
CO2-modified	32.5	12	7.51	0.01	2.271	0.000	2304	3	83.62	1.72	2186	2	34.50	0.64	Rhodophyllis gunnii	0.06299	0.00852	0.17761	0.02378	7.33	26	7.22	125.36	3016.760	3005.590	2161.100	22.230	2308.7	2216.4	0.34	0.54
Control	32.5	12	7.91	0.01	2.271	0.000	2184	2	31.99	0.61	2071	3	80.81	1.21	Rhodophyllis gunnii	0.06067	0.01446	0.14261	0.01527	7.72	26	7.61	49.22	1184.490	1180.100	2085.260	52.720	2187.2	2216.4	0.81	1.27
HCl-modified	32.5	12	7.52	0.01	2.156	0.003	2184	2	78.21	1.60	2073	1	33.21	0.70	Rhodophyllis gunnii	0.06318	0.01533	0.28174	0.02670	7.34	26	7.23	116.27	2797.970	2787.610	2049.960	21.570	2187.8	2104.1	0.33	0.52
CO2-modified	32.5	12	7.51	0.01	2.271	0.000	2304	3	83.62	1.72	2186	2	34.50	0.64	Schizosteris	0.07087	0.00712	0.22021	0.00502	7.33	26	7.22	125.36	3016.760	3005.590	2161.100	22.230	2308.7	2216.4	0.34	0.54
Control	32.5	12	7.91	0.01	2.271	0.000	2184	2	31.99	0.61	2071	3	80.81	1.21	Schizosteris	0.07244	0.01101	0.16281	0.04057	7.72	26	7.61	49.22	1184.490	1180.100	2085.260	52.720	2187.2	2216.4	0.81	1.27
HCl-modified	32.5	12	7.52	0.01	2.156	0.003	2184	2	78.21	1.60	2073	1	33.21	0.70	Schizosteris	0.08046	0.01493	0.26134	0.00970	7.34	26	7.23	116.27	2797.970	2787.610	2049.960	21.570	2187.8	2104.1	0.33	0.52
CO2-modified	32.5	12	7.51	0.01	2.271	0.000	2304	3	83.62	1.72	2186	2	34.50	0.64	Ulva sp.	0.11122	0.01715	0.36761	0.02867	7.33	26	7.22	125.36	3016.760	3005.590	2161.100	22.230	2308.7	2216.4	0.34	0.54
Control	32.5	12	7.91	0.01	2.271	0.000	2184	2	31.99	0.61	2071	3	80.81	1.21	Ulva sp.	0.09538	0.01265	0.21141	0.01848	7.72	26	7.61	49.22	1184.490	1180.100	2085.260	52.720	2187.2	2216.4	0.81	1.27
HCl-modified	32.5	12	7.52	0.01	2.156	0.003	2184	2	78.21	1.60	2073	1	33.21	0.70	Ulva sp.	0.10418	0.02270	0.33254	0.05862	7.34	26	7.23	116.27	2797.970	2787.610	2049.960	21.570	2187.8	2104.1	0.33	0.52
CO2-modified	32.5	12	7.51	0.01	2.271	0.000	2304	3	83.62	1.72	2186	2	34.50	0.64	Undaria pinnatifida	0.14722	0.03276	0.34821	0.04856	7.33	26	7.22	125.36	3016.760	3005.590	2161.100	22.230	2308.7	2216.4	0.34	0.54
Control	32.5	12	7.91	0.01	2.271	0.000	2184	2	31.99	0.61	2071	3	80.81	1.21	Undaria pinnatifida	0.11844	0.02714	0.18441	0.03627	7.72	26	7.61	49.22	1184.490	1180.100	2085.260	52.720	2187.2	2216.4	0.81	1.27
HCl-modified	32.5	12	7.52	0.01	2.156	0.003	2184	2	78.21	1.60	2073	1	33.21	0.70	Undaria pinnatifida	0.15769	0.02711	0.32934	0.02141	7.34	26	7.23	116.27	2797.970	2787.610	2049.960	21.570	2187.8	2104.1	0.33	0.52