Citation:

pp.113.219543

Name: Seawater carbonate chemistry and photosynthesis of a coccolithophorid in a laboratory experiment
Published: 2013
License: https://creativecommons.org/licenses/by/3.0/
Keywords: Bottles or small containers/Aquaria (<20 L); Chromista; Gephyrocapsa oceanica; Haptophyta; Laboratory experiment; Laboratory strains; Light; North Pacific; Pelagos; Phytoplankton; Primary production/Photosynthesis; Single species

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Published: 2013 (exact date unknown) • DOI registered: 2014-05-06

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Abstract:

Mixing of seawater subjects phytoplankton to fluctuations in photosynthetically active radiation (400-700 nm) and ultraviolet radiation (UVR; 280-400 nm). These irradiance fluctuations are now superimposed upon ocean acidification and thinning of the upper mixing layer through stratification, which alters mixing regimes. Therefore, we examined the photosynthetic carbon fixation and photochemical performance of a coccolithophore, Gephyrocapsa oceanica, grown under high, future (1,000 µatm) and low, current (390 µatm) CO2 levels, under regimes of fluctuating irradiances with or without UVR. Under both CO2 levels, fluctuating irradiances, as compared with constant irradiance, led to lower nonphotochemical quenching and less UVR-induced inhibition of carbon fixation and photosystem II electron transport. The cells grown under high CO2 showed a lower photosynthetic carbon fixation rate but lower nonphotochemical quenching and less ultraviolet B (280-315 nm)-induced inhibition. Ultraviolet A (315-400 nm) led to less enhancement of the photosynthetic carbon fixation in the high-CO2-grown cells under fluctuating irradiance. Our data suggest that ocean acidification and fast mixing or fluctuation of solar radiation will act synergistically to lower carbon fixation by G. oceanica, although ocean acidification may decrease ultraviolet B-related photochemical inhibition.

Keyword(s):

Bottles or small containers/Aquaria (<20 L); Chromista; Gephyrocapsa oceanica; Haptophyta; Laboratory experiment; Laboratory strains; Light; North Pacific; Pelagos; Phytoplankton; Primary production/Photosynthesis; Single species

Further details:

Lavigne, Héloïse; Gattuso, Jean-Pierre (2011): seacarb: seawater carbonate chemistry with R. R package version 2.4 [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 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		Jin, Peng
2	Identification	ID		Jin, Peng
3	Treatment	Treat		Jin, Peng		LC=low pCO2, HC=high pCO2
4	Replicates	Repl	#	Jin, Peng
5	Wavelength	Lambda	nm	Jin, Peng
6	Light absorption by phytoplankton per chlorophyll a	a_ph/chl	m²/mg	Jin, Peng
7	Experiment	Exp		Jin, Peng
8	Time in minutes	Time min	min	Jin, Peng		incubation time
9	Electron transport rate, absolute	aETR	mol/g/h	Jin, Peng
10	Electron transport rate, absolute, cumulative	Cum aETR	mol/g	Jin, Peng
11	Irradiance	E	µmol photons/m²/s	Jin, Peng
12	Time in minutes	Time min	min	Jin, Peng		cycle time
13	Description	Description		Jin, Peng
14	Effective absorbance cross-section of photosystem II	sigma PSII	A²/quanta	Jin, Peng
15	Non photochemical quenching	NPQ		Jin, Peng
16	Primary production	PP	µg/µg/h	Jin, Peng		per chl a
17	Ultraviolet radiation-induced inhibition of photosynthesis	UVR-induced inhibition of PN	%	Jin, Peng
18	Primary production, cumulative	PP cum	µg/µg	Jin, Peng		per chl a
19	Primary production of carbon	PP C	%	Jin, Peng
20	Percentage	Perc	%	Jin, Peng		relative absETR
21	Salinity	Sal		Jin, Peng
22	Temperature, water	Temp	°C	Jin, Peng
23	Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)	pCO2water_SST_wet	µatm	Jin, Peng		before renewal
24	Partial pressure of carbon dioxide, standard deviation	pCO2 std dev	±	Jin, Peng		before renewal
25	pH, NBS scale	pH NBS		Jin, Peng	Potentiometric	before renewal, NBS scale
26	pH, standard deviation	pH std dev	±	Jin, Peng	Potentiometric	before renewal, NBS scale
27	Carbon, inorganic, dissolved	DIC	µmol/kg	Jin, Peng	Calculated using CO2SYS	before renewal
28	Carbon, inorganic, dissolved, standard deviation	DIC std dev	±	Jin, Peng	Calculated using CO2SYS	before renewal
29	Bicarbonate ion	[HCO3]-	µmol/kg	Jin, Peng	Calculated using CO2SYS	before renewal
30	Bicarbonate ion, standard deviation	[HCO3]- std dev	±	Jin, Peng	Calculated using CO2SYS	before renewal
31	Carbonate ion	[CO3]2-	µmol/kg	Jin, Peng	Calculated using CO2SYS	before renewal
32	Carbonate ion, standard deviation	[CO3]2- std dev	±	Jin, Peng	Calculated using CO2SYS	before renewal
33	Carbon dioxide	CO2	µmol/kg	Jin, Peng	Calculated using CO2SYS	before renewal
34	Alkalinity, total	AT	µmol/kg	Jin, Peng	Calculated using CO2SYS	before renewal
35	Alkalinity, total, standard deviation	AT std dev	±	Jin, Peng	Calculated using CO2SYS	before renewal
36	Carbonate system computation flag	CSC flag		Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)	before renewal
37	pH, total scale	pHT		Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)	before renewal, total scale
38	Carbon dioxide	CO2	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)	before renewal
39	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)	before renewal
40	Bicarbonate ion	[HCO3]-	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)	before renewal
41	Carbonate ion	[CO3]2-	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)	before renewal
42	Carbon, inorganic, dissolved	DIC	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)	before renewal
43	Alkalinity, total	AT	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)	before renewal
44	Aragonite saturation state	Omega Arg		Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)	before renewal
45	Calcite saturation state	Omega Cal		Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)	before renewal
46	Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)	pCO2water_SST_wet	µatm	Jin, Peng		after renewal
47	Partial pressure of carbon dioxide, standard deviation	pCO2 std dev	±	Jin, Peng		after renewal
48	pH, NBS scale	pH NBS		Jin, Peng	Potentiometric	after renewal, NBS scale
49	pH, standard deviation	pH std dev	±	Jin, Peng	Potentiometric	after renewal, NBS scale
50	Carbon, inorganic, dissolved	DIC	µmol/kg	Jin, Peng	Calculated using CO2SYS	after renewal
51	Carbon, inorganic, dissolved, standard deviation	DIC std dev	±	Jin, Peng	Calculated using CO2SYS	after renewal
52	Bicarbonate ion	[HCO3]-	µmol/kg	Jin, Peng	Calculated using CO2SYS	after renewal
53	Bicarbonate ion, standard deviation	[HCO3]- std dev	±	Jin, Peng	Calculated using CO2SYS	after renewal
54	Carbonate ion	[CO3]2-	µmol/kg	Jin, Peng	Calculated using CO2SYS	after renewal
55	Carbonate ion, standard deviation	[CO3]2- std dev	±	Jin, Peng	Calculated using CO2SYS	after renewal
56	Carbon dioxide	CO2	µmol/kg	Jin, Peng	Calculated using CO2SYS	after renewal
57	Alkalinity, total	AT	µmol/kg	Jin, Peng	Calculated using CO2SYS	after renewal
58	Alkalinity, total, standard deviation	AT std dev	±	Jin, Peng	Calculated using CO2SYS	after renewal
59	Carbonate system computation flag	CSC flag		Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)	after renewal
60	pH, total scale	pHT		Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)	after renewal, total scale
61	Carbon dioxide	CO2	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)	after renewal
62	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)	after renewal
63	Bicarbonate ion	[HCO3]-	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)	after renewal
64	Carbonate ion	[CO3]2-	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)	after renewal
65	Carbon, inorganic, dissolved	DIC	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)	after renewal
66	Alkalinity, total	AT	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)	after renewal
67	Aragonite saturation state	Omega Arg		Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)	after renewal
68	Calcite saturation state	Omega Cal		Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)	after renewal

License:

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

Status:

Curation Level: Enhanced curation (CurationLevelC)

Size:

138064 data points

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