Citation:

11-65.1

Name: CO2-driven seawater acidification increases photochemical stress in a green alga
Published: 2012
License: https://creativecommons.org/licenses/by/3.0/
Keywords: Benthos; Bottles or small containers/Aquaria (<20 L); Chlorophyta; Coast and continental shelf; Laboratory experiment; Macroalgae; North Pacific; Plantae; Primary production/Photosynthesis; Single species; Temperate; Ulva prolifera

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Abstract:

Increased CO2 and associated acidification in seawater, known as ocean acidification, decreases calcification of most marine calcifying organisms. However, there is little information available on how marine macroalgae would respond to the chemical changes caused by seawater acidification. We hypothesized that down-regulation of bicarbonate acquisition by algae under increased acidity and CO2 levels would lower the threshold above which photosynthetically active radiation (PAR) becomes excessive. Juveniles of Ulva prolifera derived from zoospores were grown at ambient (390 µatm) and elevated (1000 µatm) CO2 concentrations for 80 days before the hypothesis was tested. Here, the CO2-induced seawater acidification increased the quantum yield under low levels of light, but induced higher nonphotochemical quenching under high light. At the same time, the PAR level at which photosynthesis became saturated was decreased and the photosynthetic affinity for CO2 or inorganic carbon decreased in the high-CO2 grown plants. These findings indicated that ocean acidification, as an environmental stressor, can reduce the threshold above which PAR becomes excessive.

Keyword(s):

Benthos; Bottles or small containers/Aquaria (<20 L); Chlorophyta; Coast and continental shelf; Laboratory experiment; Macroalgae; North Pacific; Plantae; Primary production/Photosynthesis; Single species; Temperate; Ulva prolifera

Further details:

Lavigne, Héloïse; Gattuso, Jean-Pierre (2011): seacarb: seawater carbonate chemistry with R. R package version 2.4. https://cran.r-project.org/package=seacarb

Project(s):

Ocean Acidification International Coordination Centre (OA-ICC)

Coverage:

Latitude: 34.500000 * Longitude: 119.300000

Date/Time Start: 2009-07-01T00:00:00 * Date/Time End: 2009-07-30T00:00:00

Event(s):

Lianyungang_OA * Latitude: 34.500000 * Longitude: 119.300000 * Date/Time Start: 2009-07-01T00:00:00 * Date/Time End: 2009-07-30T00:00:00 * Method/Device: Experiment (EXP)

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). The date of carbonate chemistry calculation by seacarb is 2014-03-03.

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Species	Species		Gao, Kunshan
2	Identification	ID		Gao, Kunshan
3	Treatment	Treat		Gao, Kunshan		LC=Low pCO2, HC=High pCO2
4	Irradiance	E	µmol/m²/s	Gao, Kunshan
5	Electron transport rate, relative	rETR	µmol e/m²/s	Gao, Kunshan
6	Electron transport rate, relative, standard deviation	rETR std dev	±	Gao, Kunshan
7	Time in seconds	Time	s	Gao, Kunshan
8	Effective quantum yield	Y		Gao, Kunshan
9	Effective quantum yield, standard deviation	Y std dev	±	Gao, Kunshan
10	Non photochemical quenching	NPQ		Gao, Kunshan
11	Non photochemical quenching, standard deviation	NPQ std dev	±	Gao, Kunshan
12	Carbon, inorganic, dissolved	DIC	µmol/l	Gao, Kunshan		in figure 4, 5
13	Salinity	Sal		Gao, Kunshan
14	Temperature, water	Temp	°C	Gao, Kunshan
15	pH	pH		Gao, Kunshan	Potentiometric	NBS scale
16	pH, standard deviation	pH std dev	±	Gao, Kunshan	Potentiometric	NBS scale
17	Carbon, inorganic, dissolved	DIC	µmol/l	Gao, Kunshan
18	Carbon, inorganic, dissolved, standard deviation	DIC std dev	±	Gao, Kunshan
19	Carbonate system computation flag	CSC flag		Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
20	pH	pH		Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)	total scale
21	Carbon dioxide	CO2	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
22	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)
23	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)
24	Bicarbonate ion	[HCO3]-	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
25	Carbonate ion	[CO3]2-	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
26	Alkalinity, total	AT	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
27	Aragonite saturation state	Omega Arg		Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
28	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:

3308 data points

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