Citation:

bg-15-4353-2018

Name: Interactive effects of warming and ocean acidification on the Arctic picoeukaryote Micromonas pusilla
Published: 2018-07-13
License: https://creativecommons.org/licenses/by/3.0/
Keywords: Arctic; Arctic; Biomass/Abundance/Elemental composition; Bottles or small containers/Aquaria (<20 L); Chlorophyta; Coast and continental shelf; Growth/Morphology; Laboratory experiment; Micromonas pusilla; Pelagos; Phytoplankton; Plantae; Polar; Primary production/Photosynthesis; Single species; Temperature

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Abstract:

In the Arctic Ocean, climate change effects such as warming and ocean acidification (OA) are manifesting faster than in other regions. Yet, we are lacking a mechanistic understanding of the interactive effects of these drivers on Arctic primary producers. In the current study, one of the most abundant species of the Arctic Ocean, the prasinophyte Micromonas pusilla, was exposed to a range of different pCO2levels at two temperatures representing realistic scenarios for current and future conditions. We observed that warming and OA synergistically increased growth rates at intermediate to high pCO2 levels. Furthermore, elevated temperatures shifted the pCO2-optimum of biomass production to higher levels. Based on changes in cellular composition and photophysiology, we hypothesise that the observed synergies can be explained by beneficial effects of warming on carbon fixation in combination with facilitated carbon acquisition under OA. Our findings help to understand the higher abundances of picoeukaryotes such as M. pusilla under OA, as has been observed in many mesocosm studies.

Keyword(s):

Arctic; Arctic; Biomass/Abundance/Elemental composition; Bottles or small containers/Aquaria (<20 L); Chlorophyta; Coast and continental shelf; Growth/Morphology; Laboratory experiment; Micromonas pusilla; Pelagos; Phytoplankton; Plantae; Polar; Primary production/Photosynthesis; Single species; Temperature

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 2018-07-12.

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Type	Type		Hoppe, Clara Jule Marie		study
2	Species	Species		Hoppe, Clara Jule Marie
3	Registration number of species	Reg spec no		Hoppe, Clara Jule Marie
4	Uniform resource locator/link to reference	URL ref		Hoppe, Clara Jule Marie		WoRMS Aphia ID
5	Temperature, water	Temp	°C	Hoppe, Clara Jule Marie		treatment
6	Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)	pCO2water_SST_wet	µatm	Hoppe, Clara Jule Marie		treatment
7	Identification	ID		Hoppe, Clara Jule Marie		bottle
8	Growth rate	µ	1/day	Hoppe, Clara Jule Marie
9	Division rate constant	Division Const	1/day	Hoppe, Clara Jule Marie
10	Chlorophyll a per cell	Chl a/cell	pg/#	Hoppe, Clara Jule Marie
11	Carbon, organic, particulate, per cell	POC/cell	pmol/#	Hoppe, Clara Jule Marie
12	Particulate organic nitrogen per cell	PON/cell	pmol/#	Hoppe, Clara Jule Marie
13	Carbon/Nitrogen ratio	C/N		Hoppe, Clara Jule Marie
14	Carbon, organic, particulate/chlorophyll a ratio	POC/Chl a	g/g	Hoppe, Clara Jule Marie
15	Particulate organic carbon production per cell	POC prod/cell	pmol/#/day	Hoppe, Clara Jule Marie
16	Photochemical quantum yield	Fv/Fm		Hoppe, Clara Jule Marie
17	Functional absorption cross section	Sig	1/nm²/PSII	Hoppe, Clara Jule Marie
18	Photosystem II re-opening rate	Tau	ms	Hoppe, Clara Jule Marie
19	Non photochemical quenching, maximum	NPQ max		Hoppe, Clara Jule Marie
20	Maximum light use efficiency	alpha	mol e m²/mol RCII/mol photons	Hoppe, Clara Jule Marie
21	Maximal absolute electron transfer rate	ETR max	mol e/mol RCII/s	Hoppe, Clara Jule Marie
22	Saturation light intensity	Ek	µmol photons/m²/s	Hoppe, Clara Jule Marie
23	pH	pH		Hoppe, Clara Jule Marie		total scale
24	Alkalinity, total	AT	µmol/kg	Hoppe, Clara Jule Marie
25	Carbon, inorganic, dissolved	DIC	µmol/kg	Hoppe, Clara Jule Marie
26	Carbon dioxide	CO2	µmol/kg	Hoppe, Clara Jule Marie
27	Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)	pCO2water_SST_wet	µatm	Hoppe, Clara Jule Marie
28	Salinity	Sal		Hoppe, Clara Jule Marie
29	Temperature, water	Temp	°C	Hoppe, Clara Jule Marie
30	Temperature, water, standard deviation	Temp std dev	±	Hoppe, Clara Jule Marie
31	Carbonate system computation flag	CSC flag		Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
32	Carbon dioxide	CO2	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
33	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)
34	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)
35	Bicarbonate ion	[HCO3]-	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
36	Carbonate ion	[CO3]2-	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
37	Carbon, inorganic, dissolved	DIC	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
38	Aragonite saturation state	Omega Arg		Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
39	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:

923 data points

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