Citation:

PANGAEA.934302

Name: Seawater carbonate chemistry and microbial abundances, bacterial activity and extracellular enzyme activities
Published: 2016
License: https://creativecommons.org/licenses/by/4.0/
Keywords: Biomass/Abundance/Elemental composition; Coast and continental shelf; Community composition and diversity; Containers and aquaria (20-1000 L or < 1 m**2); Entire community; Laboratory experiment; Macro-nutrients; Mediterranean Sea; Other metabolic rates; Pelagos; Temperate; Temperature

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Abstract:

We investigated the effects of an increase in dissolved CO2 on the microbial communities of the Mediterranean Sea during two mesocosm experiments in two contrasting seasons: winter, at the peak of the annual phytoplankton bloom, and summer, under low nutrient conditions. The experiments included treatments with acidification and nutrient addition, and combinations of the two. We followed the effects of ocean acidification (OA) on the abundance of the main groups of microorganisms (diatoms, dinoflagellates, nanoeukaryotes, picoeukaryotes, cyanobacteria, and heterotrophic bacteria) and on bacterial activity, leucine incorporation, and extracellular enzyme activity. Our results showed a clear stimulation effect of OA on the abundance of small phytoplankton (pico- and nanoeukaryotes), independently of the season and nutrient availability. A large number of the measured variables showed significant positive effects of acidification in summer compared with winter, when the effects were sometimes negative. Effects of OA were more conspicuous when nutrient concentrations were low. Our results therefore suggest that microbial communities in oligotrophic waters are considerably affected by OA, whereas microbes in more productive waters are less affected. The overall enhancing effect of acidification on eukaryotic pico- and nanophytoplankton, in comparison with the non-significant or even negative response to nutrient-rich conditions of larger groups and autotrophic prokaryotes, suggests a shift towards medium-sized producers in a future acidified ocean.

Keyword(s):

Biomass/Abundance/Elemental composition; Coast and continental shelf; Community composition and diversity; Containers and aquaria (20-1000 L or < 1 m**2); Entire community; Laboratory experiment; Macro-nutrients; Mediterranean Sea; Other metabolic rates; Pelagos; Temperate; Temperature

Supplement to:

Sala, M M; Aparicio, F L; Balagué, Vanessa; Boras, J A; Borrull, E; Cardelus, C; Cros, Lluisa; Gomes, Ana; Lopez-Sanz, Angel; Malits, A; Martinez, R A; Mestre, M; Movilla, Juancho; Sarmento, Hugo; Vazquez-Dominguez, E; Vaqué, Dolors; Pinhassi, Jarone; Calbet, Albert; Calvo, Eva; Gasol, Josep M; Pelejero, Carles; Marrasé, Celia (2016): Contrasting effects of ocean acidification on the microbial food web under different trophic conditions. ICES Journal of Marine Science, 73(3), 670-679, https://doi.org/10.1093/icesjms/fsv130

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: 41.666600 * Longitude: 2.800000

Event(s):

Blanes_Bay_Microbial_Observatory * Latitude: 41.666600 * Longitude: 2.800000 * 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 2021-07-28.

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Type	Type		Sala, M M		study
2	Treatment	Treat		Sala, M M
3	Replicate	Repl		Sala, M M
4	Experiment day	Exp day	day	Sala, M M
5	Alkalinity, total	AT	µmol/kg	Sala, M M	Potentiometric titration
6	Salinity	Sal		Sala, M M
7	Temperature, water	Temp	°C	Sala, M M
8	pH	pH		Sala, M M	Spectrophotometric	total scale
9	Chlorophyll a	Chl a	µg/l	Sala, M M
10	Chlorophyll a	Chl a	µg/l	Sala, M M		<3
11	Abundance per volume	Abund v	#/ml	Sala, M M		Diatoms
12	Abundance per volume	Abund v	#/ml	Sala, M M		Dinoflagellates
13	Abundance per volume	Abund v	#/ml	Sala, M M		Nanoeukaryotes
14	Abundance per volume	Abund v	#/ml	Sala, M M		Large picoeukaryotes
15	Abundance per volume	Abund v	#/ml	Sala, M M		Small picoeukaryotes
16	Abundance per volume	Abund v	#/ml	Sala, M M		Synechococcus
17	Abundance per volume	Abund v	#/ml	Sala, M M		Prochlorococcus
18	Abundance per volume	Abund v	#/ml	Sala, M M		Bacteria
19	Leucine incorporation rate	Leuc inc rate	nmol/l/h	Sala, M M
20	Chitobiase activity	Chitobiase activity	µmol/l/h	Sala, M M
21	alpha-glucosidase activity	MUF-aglu	µmol/l/h	Sala, M M
22	beta-glucosidase activity	MUF-bglu	µmol/l/h	Sala, M M
23	Leucine aminopeptidase activity	Leu aminopep	nmol/l/h	Sala, M M
24	Carbonate system computation flag	CSC flag		Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
25	Carbon dioxide	CO2	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
26	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)
27	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)
28	Bicarbonate ion	[HCO3]-	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
29	Carbonate ion	[CO3]2-	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
30	Carbon, inorganic, dissolved	DIC	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
31	Aragonite saturation state	Omega Arg		Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
32	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:

3914 data points

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