Citation:

PANGAEA.939406

Name: Seawater carbonate chemistry and specific growth rate, respiration rate, net photosynthetic rate and photochemical parameters of Phaeodactylum tricornutum
Published: 2021-12-15
License: https://creativecommons.org/licenses/by/4.0/
Keywords: Bottles or small containers/Aquaria (<20 L); Chromista; Growth/Morphology; Laboratory experiment; Laboratory strains; Light; Not applicable; Ochrophyta; Pelagos; Phaeodactylum tricornutum; Phytoplankton; Primary production/Photosynthesis; Respiration; Single species

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Abstract:

Experimentally elevated pCO2 and the associated pH drop are known to differentially affect many aspects of the physiology of diatoms under different environmental conditions or in different regions. However, contrasting responses to elevated pCO2 in the dark and light periods of a diel cycle have not been documented. By growing the model diatom Phaeodactylum tricornutum under 3 light levels and 2 different CO2 concentrations, we found that the elevated pCO2/pH drop projected for future ocean acidification reduced the diatom's growth rate by 8–25% during the night period but increased it by up to 9–21% in the light period, resulting in insignificant changes in growth over the diel cycle under the three different light levels. The elevated pCO2 increased the respiration rates irrespective of growth light levels and light or dark periods and enhanced its photosynthetic performance during daytime. With prolonged exposure to complete darkness, simulating the sinking process in the dark zones of the ocean, the growth rates decreased faster under elevated pCO2, along with a faster decline in quantum yield and cell size. Our results suggest that elevated pCO2 enhances the diatom's respiratory energy supplies to cope with acidic stress during the night period but enhances its death rate when the cells sink to dark regions of the oceans below the photic zone, with implications for a possible acidification-induced reduction in vertical transport of organic carbon.

Keyword(s):

Bottles or small containers/Aquaria (<20 L); Chromista; Growth/Morphology; Laboratory experiment; Laboratory strains; Light; Not applicable; Ochrophyta; Pelagos; Phaeodactylum tricornutum; Phytoplankton; Primary production/Photosynthesis; Respiration; Single species

Supplement to:

Qu, Liming; Beardall, John; Jiang, Xiaowen; Gao, Kunshan (2021): Elevated pCO2 enhances under light but reduces in darkness the growth rate of a diatom, with implications for the fate of phytoplankton below the photic zone. Limnology and Oceanography, 66(10), 3630-3642, https://doi.org/10.1002/lno.11903

Further details:

Gattuso, Jean-Pierre; Epitalon, Jean-Marie; Lavigne, Héloïse; Orr, James (2021): seacarb: seawater carbonate chemistry with R. R package version 3.2.16. https://cran.r-project.org/web/packages/seacarb/index.html

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 (Gattuso et al, 2021) 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 2021-12-15.

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Type	Type		Gao, Kunshan		study
2	Species	Species		Gao, Kunshan
3	Registration number of species	Reg spec no		Gao, Kunshan
4	Uniform resource locator/link to reference	URL ref		Gao, Kunshan		WoRMS Aphia ID
5	Treatment	Treat		Gao, Kunshan
6	Light mode	L mode		Gao, Kunshan
7	Growth rate	µ	1/h	Gao, Kunshan
8	Growth rate	µ	1/day	Gao, Kunshan
9	Cell, diameter	Cell diam	µm	Gao, Kunshan
10	Cell, diameter, standard deviation	Cell diam std dev	±	Gao, Kunshan
11	Respiration rate, oxygen, per cell	Resp O2/cell	fmol/#/h	Gao, Kunshan
12	Respiration rate, oxygen, standard deviation	Resp O2 std dev	±	Gao, Kunshan
13	Ratio	Ratio		Gao, Kunshan		R (L) to R (D)
14	Ratio, standard deviation	Ratio std dev	±	Gao, Kunshan		R (L) to R (D)
15	Net photosynthesis rate, oxygen, per cell	PN O2/cell	fmol/#/h	Gao, Kunshan
16	Net photosynthesis rate, standard deviation	PN std dev	±	Gao, Kunshan
17	Chlorophyll a per cell	Chl a/cell	pg/#	Gao, Kunshan
18	Chlorophyll a, standard deviation	Chl a std dev	±	Gao, Kunshan
19	Carotenoids per cell	Carotenoids/cell	pg/#	Gao, Kunshan
20	Carotenoids, standard deviation	Carotenoids std dev	±	Gao, Kunshan
21	Carotenoids/Chlorophyll a ratio	Carotenoids/Chl a		Gao, Kunshan
22	Carotenoids/Chlorophyll a ratio, standard deviation	Carotenoids/Chl a std dev	±	Gao, Kunshan
23	Maximum quantum yield of photosystem II	Fv/Fm		Gao, Kunshan
24	Maximum quantum yield of photosystem II, standard deviation	Fv/Fm std dev	±	Gao, Kunshan
25	Effective photochemical quantum yield	phi PS II		Gao, Kunshan
26	Effective photochemical quantum yield, standard deviation	phi PS II std dev	±	Gao, Kunshan
27	Electron transport rate, relative	rETR	µmol e/m²/s	Gao, Kunshan
28	Electron transport rate, relative	rETR		Gao, Kunshan
29	Time in hours	Time	h	Gao, Kunshan
30	Salinity	Sal		Gao, Kunshan
31	Temperature, water	Temp	°C	Gao, Kunshan
32	pH	pH		Gao, Kunshan		total scale
33	pH, standard deviation	pH std dev	±	Gao, Kunshan		total scale
34	Alkalinity, total	AT	µmol/kg	Gao, Kunshan
35	Alkalinity, total, standard deviation	AT std dev	±	Gao, Kunshan
36	Carbon, inorganic, dissolved	DIC	µmol/kg	Gao, Kunshan	Calculated using CO2SYS
37	Carbon, inorganic, dissolved, standard deviation	DIC std dev	±	Gao, Kunshan	Calculated using CO2SYS
38	Bicarbonate ion	[HCO3]-	µmol/kg	Gao, Kunshan	Calculated using CO2SYS
39	Bicarbonate ion, standard deviation	[HCO3]- std dev	±	Gao, Kunshan	Calculated using CO2SYS
40	Carbonate ion	[CO3]2-	µmol/kg	Gao, Kunshan	Calculated using CO2SYS
41	Carbonate ion, standard deviation	[CO3]2- std dev	±	Gao, Kunshan	Calculated using CO2SYS
42	Carbon dioxide	CO2	µmol/kg	Gao, Kunshan	Calculated using CO2SYS
43	Carbon dioxide, standard deviation	CO2 std dev	±	Gao, Kunshan	Calculated using CO2SYS
44	Carbonate system computation flag	CSC flag		Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
45	Carbon dioxide	CO2	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
46	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)
47	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)
48	Bicarbonate ion	[HCO3]-	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
49	Carbonate ion	[CO3]2-	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
50	Carbon, inorganic, dissolved	DIC	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
51	Aragonite saturation state	Omega Arg		Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
52	Calcite saturation state	Omega Cal		Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)

License:

Creative Commons Attribution 4.0 International (CC-BY-4.0)

Status:

Curation Level: Enhanced curation (CurationLevelC)

Size:

3030 data points

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