Citation:

PANGAEA.926447

Name: Seawater carbonate chemistry and growth and grazing impact of Antarctic heterotrophic nanoflagellates
Published: 2020
License: https://creativecommons.org/licenses/by/4.0/
Keywords: Antarctic; Community composition and diversity; Containers and aquaria (20-1000 L or < 1 m**2); Entire community; Laboratory experiment; Pelagos; Polar

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Abstract:

High-latitude oceans have been identified as particularly vulnerable to ocean acidification if anthropogenic CO2 emissions continue. Marine microbes are an essential part of the marine food web and are a critical link in biogeochemical processes in the ocean, such as the cycling of nutrients and carbon. Despite this, the response of Antarctic marine microbial communities to ocean acidification is poorly understood. We investigated the effect of increasing fCO2 on the growth of heterotrophic nanoflagellates (HNFs), nano- and picophytoplankton, and prokaryotes (heterotrophic Bacteria and Archaea) in a natural coastal Antarctic marine microbial community from Prydz Bay, East Antarctica. At CO2 levels ≥634 µatm, HNF abundance was reduced, coinciding with increased abundance of picophytoplankton and prokaryotes. This increase in picophytoplankton and prokaryote abundance was likely due to a reduction in top-down control of grazing HNFs. Nanophytoplankton abundance was elevated in the 634 µatm treatment, suggesting that moderate increases in CO2 may stimulate growth. The taxonomic and morphological differences in CO2 tolerance we observed are likely to favour dominance of microbial communities by prokaryotes, nanophytoplankton, and picophytoplankton. Such changes in predator–prey interactions with ocean acidification could have a significant effect on the food web and biogeochemistry in the Southern Ocean, intensifying organic-matter recycling in surface waters; reducing vertical carbon flux; and reducing the quality, quantity, and availability of food for higher trophic levels.

Keyword(s):

Antarctic; Community composition and diversity; Containers and aquaria (20-1000 L or < 1 m**2); Entire community; Laboratory experiment; Pelagos; Polar

Supplement to:

Deppeler, Stacy; Schulz, Kai Georg; Hancock, Alyce M; Pascoe, Penelope; McKinlay, John; Davidson, Andrew T (2020): Ocean acidification reduces growth and grazing impact of Antarctic heterotrophic nanoflagellates. Biogeosciences, 17(16), 4153-4171, https://doi.org/10.5194/bg-17-4153-2020

Original version:

Deppeler, Stacy; Davidson, Andrew T; Schulz, Kai (2017): Environmental data for Davis 14/15 ocean acidification minicosm experiment. Australian Antarctic Data Centre, https://doi.org/10.4225/15/599a7dfe9470a

Deppeler, Stacy; Schulz, Kai; Hancock, Alyce M; Pascoe, Penelope; McKinlay, John; Davidson, Andrew T (2019): Data for manuscript 'Ocean acidification reduces growth and grazing of Antarctic heterotrophic nanoflagellates'. Australian Antarctic Data Centre, https://doi.org/10.4225/15/5b234e4bb9313

Hancock, Alyce M; Davidson, Andrew T; McKinlay, John; McMinn, Andrew; Schulz, Kai; van den Enden, Rick (2018): Ocean acidification changes the structure of an Antarctic coastal protistan community. Australian Antarctic Data Centre, https://doi.org/10.4225/15/592b83a5c7506

Further details:

Gattuso, Jean-Pierre; Epitalon, Jean-Marie; Lavigne, Héloïse; Orr, James; Gentili, Bernard; Hagens, Mathilde; Hofmann, Andreas; Mueller, Jens-Daniel; Proye, Aurélien; Rae, James; Soetaert, Karline (2020): seacarb: seawater carbonate chemistry with R. R package version 3.2.14. https://CRAN.R-project.org/package=seacarb

Project(s):

Ocean Acidification International Coordination Centre (OA-ICC)

Coverage:

Latitude: -68.583330 * Longitude: 77.966670

Date/Time Start: 2014-11-19T00:00:00 * Date/Time End: 2014-11-19T00:00:00

Event(s):

Prydz_Bay_OA * Latitude: -68.583330 * Longitude: 77.966670 * Date/Time: 2014-11-19T00:00:00 * Method/Device: Experiment (EXP)

Comment:

In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Gattuso et al, 2020) 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 2020-12-25.

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Type	Type		Deppeler, Stacy		study
2	Date	Date		Deppeler, Stacy
3	Duration, number of days	Duration	days	Deppeler, Stacy
4	Fugacity of carbon dioxide (water) at sea surface temperature (wet air)	fCO2water_SST_wet	µatm	Deppeler, Stacy
5	Identification	ID		Deppeler, Stacy		Tank
6	Replicate	Repl		Deppeler, Stacy
7	Picophytoplankton	Picophytopl	#/ml	Deppeler, Stacy
8	Nanophytoplankton	Nanophytopl	#/ml	Deppeler, Stacy
9	Nanoflagellates, heterotrophic	HNF	#/ml	Deppeler, Stacy
10	Prokaryotes	Prokaryotes	#/l	Deppeler, Stacy		High DNA
11	Prokaryotes	Prokaryotes	#/l	Deppeler, Stacy		Low DNA
12	Prokaryotes	Prokaryotes	#/l	Deppeler, Stacy		Total
13	Treatment	Treat		Deppeler, Stacy		Light Filters
14	Position	Position		Deppeler, Stacy		Position
15	Irradiance	E	µmol/m²/s	Deppeler, Stacy		Left
16	Irradiance	E	µmol/m²/s	Deppeler, Stacy		Middle
17	Irradiance	E	µmol/m²/s	Deppeler, Stacy		Right
18	Chlorophyll a	Chl a	µg/l	Deppeler, Stacy
19	Light attenuation, vertical	Kd	1/m	Deppeler, Stacy		due to increases in Chl a concentration
20	Light attenuation, vertical	Kd	1/m	Deppeler, Stacy		total
21	Irradiance	E	µmol/m²/s	Deppeler, Stacy		average
22	Species	Species		Deppeler, Stacy
23	Cell density	Cells	#/ml	Deppeler, Stacy
24	Cell density, standard error	Cells std e	±	Deppeler, Stacy
25	Carbon, inorganic, dissolved	DIC	µmol/kg	Deppeler, Stacy
26	pH	pH		Deppeler, Stacy		total scale
27	Salinity	Sal		Deppeler, Stacy
28	Temperature, water	Temp	°C	Deppeler, Stacy
29	Alkalinity, total	AT	µmol/kg	Deppeler, Stacy
30	Fugacity of carbon dioxide (water) at sea surface temperature (wet air)	fCO2water_SST_wet	µatm	Deppeler, Stacy
31	Aragonite saturation state	Omega Arg		Deppeler, Stacy
32	Calcite saturation state	Omega Cal		Deppeler, Stacy
33	Nitrogen oxide	NOx	µg/l	Deppeler, Stacy
34	Nitrogen oxide	NOx	µmol/l	Deppeler, Stacy
35	Phosphate	PO4	µg/l	Deppeler, Stacy
36	Phosphate	[PO4]3-	µmol/l	Deppeler, Stacy
37	Silicate	Si(OH)4	µg/l	Deppeler, Stacy
38	Silicate	Si(OH)4	µmol/l	Deppeler, Stacy
39	Ammonium	[NH4]+	µmol/l	Deppeler, Stacy
40	Carbonate system computation flag	CSC flag		Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
41	Carbon dioxide	CO2	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
42	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)
43	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)
44	Bicarbonate ion	[HCO3]-	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
45	Carbonate ion	[CO3]2-	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
46	Alkalinity, total	AT	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
47	Aragonite saturation state	Omega Arg		Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
48	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:

53927 data points

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