Citation:

PANGAEA.944403

Name: Seawater carbonate chemistry and macromolecular data of diatoms
Published: 2022-05-20
License: https://creativecommons.org/licenses/by/4.0/
Keywords: Antarctic; Coast and continental shelf; Community composition and diversity; Containers and aquaria (20-1000 L or < 1 m**2); Entire community; Growth/Morphology; Laboratory experiment; Other studied parameter or process; Pelagos; Polar

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Abstract:

Primary production in the Southern Ocean is dominated by diatom-rich phytoplankton assemblages, whose individual physiological characteristics and community composition are strongly shaped by the environment, yet knowledge on how diatoms allocate cellular energy in response to ocean acidification (OA) is limited. Understanding such changes in allocation is integral to determining the nutritional quality of diatoms and the subsequent impacts on the trophic transfer of energy and nutrients.

Using synchrotron-based Fourier transform infrared microspectroscopy, we analysed the macromolecular content of selected individual diatom taxa from a natural Antarctic phytoplankton community exposed to a gradient of fCO2 levels (288–1263 µatm).

Strong species-specific differences in macromolecular partitioning were observed under OA. Large taxa showed preferential energy allocation towards proteins, while smaller taxa increased both lipid and protein stores at high fCO2.

If these changes are representative of future Antarctic diatom physiology, we may expect a shift away from lipid-rich large diatoms towards a community dominated by smaller taxa, but with higher lipid and protein stores than their present-day contemporaries, a response that could have cascading effects on food web dynamics in the Antarctic marine ecosystem.

Keyword(s):

Antarctic; Coast and continental shelf; Community composition and diversity; Containers and aquaria (20-1000 L or < 1 m**2); Entire community; Growth/Morphology; Laboratory experiment; Other studied parameter or process; Pelagos; Polar

Supplement to:

Duncan, Rebecca J; Nielsen, Daniel A; Sheehan, Cristin E; Deppeler, Stacy; Hancock, Alyce M; Schulz, Kai; Davidson, Andrew T; Petrou, Katherina (2022): Ocean acidification alters the nutritional value of Antarctic diatoms. New Phytologist, 233, 1813–1827, https://doi.org/10.1111/nph.17868

Original version:

Petrou, Katherina (2021): Macromolecular data of diatoms exposed to Ocean Acidification - Mesocosm Experiments at Davis Station, Antarctica. Australian Antarctic Data Centre, https://doi.org/10.26179/ej5x-2h37

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)

Coverage:

Latitude: -68.211000 * Longitude: 77.966600

Event(s):

Davis_Station_Antarctica * Latitude: -68.211000 * Longitude: 77.966600 * Method/Device: Experiment (EXP)

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 2022-05-18.

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Type	Type		Petrou, Katherina		study
2	Species	Species		Petrou, Katherina
3	Sample code/label	Sample label		Petrou, Katherina
4	Identification	ID		Petrou, Katherina
5	Peak area	Peak area		Petrou, Katherina		cell
6	Compounds	Comp		Petrou, Katherina
7	Cell biovolume	Cell biovol	µm³	Petrou, Katherina
8	Fugacity of carbon dioxide (water) at sea surface temperature (wet air)	fCO2water_SST_wet	µatm	Petrou, Katherina
9	Phosphorus, reactive soluble	SRP	µmol/l	Petrou, Katherina
10	Silicate	Si(OH)4	µmol/l	Petrou, Katherina
11	Carbon, inorganic, dissolved	DIC	µmol/kg	Petrou, Katherina
12	pH	pH		Petrou, Katherina		total scale
13	Alkalinity, total	AT	µmol/kg	Petrou, Katherina
14	Salinity	Sal		Petrou, Katherina
15	Temperature, water	Temp	°C	Petrou, Katherina
16	Carbonate system computation flag	CSC flag		Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
17	Carbon dioxide	CO2	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
18	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)
19	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)
20	Bicarbonate ion	[HCO3]-	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
21	Carbonate ion	[CO3]2-	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
22	Alkalinity, total	AT	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
23	Aragonite saturation state	Omega Arg		Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
24	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:

98002 data points

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