Citation:

jpy.12753

Name: Seawater carbonate chemistry and particulate organic carbon accumulation of two Antarctic diatom species
Published: 2018-08-03
License: https://creativecommons.org/licenses/by/3.0/
Keywords: Biomass/Abundance/Elemental composition; Bottles or small containers/Aquaria (<20 L); Chromista; Coast and continental shelf; Fragilariopsis curta; Laboratory experiment; Light; Not applicable; Ochrophyta; Odontella weissflogii; Pelagos; Phytoplankton; Polar; Primary production/Photosynthesis; Single species

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Abstract:

Impacts of rising atmospheric CO2 concentrations and increased daily irradiances from enhanced surface water stratification on phytoplankton physiology in the coastal Southern Ocean remain still unclear. Therefore, in the two Antarctic diatoms Fragilariopsis curta and Odontella weissflogii the effects of moderate and high natural solar radiation combined with either ambient or future pCO2 on cellular particulate organic carbon (POC) contents and photophysiology were investigated. Results showed that increasing CO2 concentrations had greater impacts on diatom physiology than exposure to increasing solar radiation. Irrespective of the applied solar radiation regime, cellular POC quotas increased with future pCO2 in both diatoms. Lowered maximum quantum yields of photochemistry in PSII (Fv/Fm) indicated a higher photosensitivity under these conditions, being counteracted by increased cellular concentrations of functional photosynthetic reaction centers. Overall, our results suggest that both bloom‐forming Antarctic coastal diatoms might increase carbon contents under future pCO2 conditions despite reduced physiological fitness. This indicates a higher potential for primary productivity by the two diatom species with important implications for the CO2 sequestration potential of diatom communities in the future coastal Southern Ocean.

Keyword(s):

Biomass/Abundance/Elemental composition; Bottles or small containers/Aquaria (<20 L); Chromista; Coast and continental shelf; Fragilariopsis curta; Laboratory experiment; Light; Not applicable; Ochrophyta; Odontella weissflogii; Pelagos; Phytoplankton; Polar; Primary production/Photosynthesis; Single species

Further details:

Gattuso, Jean-Pierre; Epitalon, Jean-Marie; Lavigne, Héloïse; Orr, James C; Gentili, Bernard; Proye, Aurélien; Soetaert, Karline; Rae, James (2016): seacarb: seawater carbonate chemistry with R. R package version 3.1. 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 (Gattuso et al, 2016) 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 2018-08-03.

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Type	Type		Trimborn, Scarlett		study
2	Species	Species		Trimborn, Scarlett
3	Registration number of species	Reg spec no		Trimborn, Scarlett
4	Uniform resource locator/link to reference	URL ref		Trimborn, Scarlett		WoRMS Aphia ID
5	Treatment	Treat		Trimborn, Scarlett		Irradiance
6	Treatment	Treat		Trimborn, Scarlett		CO2 level
7	Carbon, organic, particulate, per cell	POC/cell	pg/#	Trimborn, Scarlett
8	Carbon, organic, particulate, standard deviation	POC std dev	±	Trimborn, Scarlett
9	Nitrogen, organic, particulate, per cell	PON/cell	pg/#	Trimborn, Scarlett
10	Nitrogen, organic, particulate, standard deviation	PON std dev	±	Trimborn, Scarlett
11	Carbon/Nitrogen ratio	C/N		Trimborn, Scarlett
12	Carbon/Nitrogen ratio, standard deviation	C/N std dev	±	Trimborn, Scarlett
13	Maximum photochemical quantum yield of photosystem II	Fv/Fm		Trimborn, Scarlett		measured
14	Maximum photochemical quantum yield of photosystem II, standard deviation	Fv/Fm std dev	±	Trimborn, Scarlett
15	Maximum photochemical quantum yield of photosystem II	Fv/Fm		Trimborn, Scarlett		calculated
16	Salinity	Sal		Trimborn, Scarlett
17	Temperature, water	Temp	°C	Trimborn, Scarlett
18	Temperature, water, standard deviation	Temp std dev	±	Trimborn, Scarlett
19	Silicate	Si(OH)4	µmol/l	Trimborn, Scarlett
20	Phosphate	[PO4]3-	µmol/l	Trimborn, Scarlett
21	Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)	pCO2water_SST_wet	µatm	Trimborn, Scarlett
22	Partial pressure of carbon dioxide, standard deviation	pCO2 std dev	±	Trimborn, Scarlett
23	Alkalinity, total	AT	µmol/kg	Trimborn, Scarlett
24	Alkalinity, total, standard deviation	AT std dev	±	Trimborn, Scarlett
25	pH	pH		Trimborn, Scarlett		NBS scale
26	pH, standard deviation	pH std dev	±	Trimborn, Scarlett		NBS scale
27	Carbon, inorganic, dissolved	DIC	µmol/kg	Trimborn, Scarlett
28	Carbon, inorganic, dissolved, standard deviation	DIC std dev	±	Trimborn, Scarlett
29	Carbonate system computation flag	CSC flag		Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
30	pH	pH		Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)	total scale
31	Carbon dioxide	CO2	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
32	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)
33	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)
34	Bicarbonate ion	[HCO3]-	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
35	Carbonate ion	[CO3]2-	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
36	Carbon, inorganic, dissolved	DIC	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
37	Aragonite saturation state	Omega Arg		Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
38	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:

304 data points

Data

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

1 Type (study)	2 Species	3 Reg spec no	4 URL ref (WoRMS Aphia ID)	5 Treat (Irradiance)	6 Treat (CO2 level)	7 POC/cell [pg/#]	8 POC std dev [±]	9 PON/cell [pg/#]	10 PON std dev [±]	11 C/N	12 C/N std dev [±]	13 Fv/Fm (measured)	14 Fv/Fm std dev [±]	15 Fv/Fm (calculated)	16 Sal	17 Temp [°C]	18 Temp std dev [±]	19 Si(OH)4 [µmol/l]	20 [PO4]3- [µmol/l]	21 pCO2water_SST_wet [µatm]	22 pCO2 std dev [±]	23 AT [µmol/kg]	24 AT std dev [±]	25 pH (NBS scale)	27 DIC [µmol/kg]	28 DIC std dev [±]	29 CSC flag	30 pH (total scale)	31 CO2 [µmol/kg]	32 fCO2water_SST_wet [µatm]	33 pCO2water_SST_wet [µatm]	34 [HCO3]- [µmol/kg]	35 [CO3]2- [µmol/kg]	36 DIC [µmol/kg]	37 Omega Arg	38 Omega Cal
laboratory	Fragilariopsis curta (phytoplankton)	341554	marinespecies.org	moderate solar radiation	current CO2	10.92	2.58	1.61	0.36	7.88	0.23	0.39	0.02	0.37	32.85	-0.38	0.14	45.00	6.25	325.00	3.00	2464.00	5.00	8.11	1709.00	4.00	26	8.02	28.38	439.10	441.05	2232.92	90.32	2351.63	1.37	2.19
laboratory	Fragilariopsis curta (phytoplankton)	341554	marinespecies.org	high solar radiation	current CO2	6.08	0.74	1.01	0.13	7.06	0.82	0.39	0.03	0.39	32.85	-0.38	0.14	45.00	6.25	325.00	3.00	2464.00	5.00	8.11	1709.00	4.00	26	8.02	28.38	439.10	441.05	2232.92	90.32	2351.63	1.37	2.19
laboratory	Fragilariopsis curta (phytoplankton)	341554	marinespecies.org	moderate solar radiation	future CO2	18.73	2.91	2.40	0.30	9.09	0.62	0.25	0.08	0.25	32.85	-0.38	0.14	45.00	6.25	830.00	8.00	2464.00	5.00	7.74	1832.00	5.00	26	7.65	70.69	1093.59	1098.44	2357.23	40.42	2468.34	0.61	0.98
laboratory	Fragilariopsis curta (phytoplankton)	341554	marinespecies.org	high solar radiation	future CO2	17.17	2.40	2.46	0.36	8.19	0.95	0.33	0.03	0.33	32.85	-0.38	0.14	45.00	6.25	830.00	8.00	2464.00	5.00	7.74	1832.00	5.00	26	7.65	70.69	1093.59	1098.44	2357.23	40.42	2468.34	0.61	0.98
laboratory	Odontella weissflogii (phytoplankton)	341487	marinespecies.org	moderate solar radiation	current CO2	5977.00	221.00	800.00	38.00	9.00	1.01	0.30	0.02	0.31	32.85	-0.38	0.14	45.00	6.25	325.00	3.00	2464.00	5.00	8.11	1709.00	4.00	26	8.02	28.38	439.10	441.05	2232.92	90.32	2351.63	1.37	2.19
laboratory	Odontella weissflogii (phytoplankton)	341487	marinespecies.org	high solar radiation	current CO2	3453.00	144.00	474.00	10.00	8.58	0.66	0.33	0.01	0.33	32.85	-0.38	0.14	45.00	6.25	325.00	3.00	2464.00	5.00	8.11	1709.00	4.00	26	8.02	28.38	439.10	441.05	2232.92	90.32	2351.63	1.37	2.19
laboratory	Odontella weissflogii (phytoplankton)	341487	marinespecies.org	moderate solar radiation	future CO2	11383.00	2939.00	1203.00	107.00	10.75	1.82	0.13	0.02	0.14	32.85	-0.38	0.14	45.00	6.25	830.00	8.00	2464.00	5.00	7.74	1832.00	5.00	26	7.65	70.69	1093.59	1098.44	2357.23	40.42	2468.34	0.61	0.98
laboratory	Odontella weissflogii (phytoplankton)	341487	marinespecies.org	high solar radiation	future CO2	11218.00	1216.00	1218.00	153.00	10.65	0.81	0.11	0.05	0.10	32.85	-0.38	0.14	45.00	6.25	830.00	8.00	2464.00	5.00	7.74	1832.00	5.00	26	7.65	70.69	1093.59	1098.44	2357.23	40.42	2468.34	0.61	0.98