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Moustaka-Gouni, Maria; Kormas, Konstantinos A; Scotti, Marco; Vardaka, S; Sommer, Ulrich (2017): Warming and acidification effects on planktonic heterotrophic Pico- and Nanoflagellates in a mesocosm experiment. PANGAEA, https://doi.org/10.1594/PANGAEA.873191

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Abstract:
We studied the response of the heterotrophic flagellate (HF) community to the combined impact of warming and ocean acidification in a mesocosm experiment with a plankton community from the western Baltic Sea. We performed a quantitative analysis of the response at the level of total biomass and size classes and a semi-quantitative one at the level of individual taxa. Total biomass of HF was significantly lower under higher temperatures while there was no significant effect of CO2. The mean biomass of the picoflagellates did not respond to temperature while the three nanoflagellate size classes (class limits 3, 5, 8, 15 ?m) responded negatively to warming while not responding to CO2. The taxon-level results indicate that heterotrophic flagellates do not form a homogenous trophic guild, as often assumed in pelagic food web studies. Instead, the heterotrophic flagellates formed a ?food web within the food web?. There was a pronounced succession of flagellates leading from a dominance of bacterivores and colloidal matter feeders before the phytoplankton bloom to omnivorous feeders preying upon phytoplankton and heterotrophic flagellates during and after the bloom. This complex intraguild predation patterns probably dampened the response to experimental treatments.
Related to:
Moustaka-Gouni, Maria; Kormas, Konstantinos A; Scotti, Marco; Vardaka, S; Sommer, Ulrich (2016): Warming and Acidification Effects on Planktonic Heterotrophic Pico- and Nanoflagellates in a Mesocosm Experiment. Protist, 167(4), 389-410, https://doi.org/10.1016/j.protis.2016.06.004
Sommer, Ulrich; Paul, Carolin; Moustaka-Gouni, Maria (2014): Mesocosm experiment on warming and acidification effects on phytoplankton composition and cell size. PANGAEA, https://doi.org/10.1594/PANGAEA.840845
Original version:
Sommer, Ulrich; Moustaka-Gouni, Maria (2016): Warming and acidification effects on planktonic heterotrophic pico- and nanoflagellates in a mesocosm experiment. PANGAEA, https://doi.org/10.1594/PANGAEA.857999
Further details:
Gattuso, Jean-Pierre; Epitalon, Jean-Marie; Lavigne, Héloise; 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
Coverage:
Latitude: 54.520000 * Longitude: 10.410000
Date/Time Start: 2012-10-19T00:00:00 * Date/Time End: 2012-11-12T00:00:00
Event(s):
Kiel_Bight * Latitude: 54.520000 * Longitude: 10.410000 * Date/Time Start: 2012-10-19T00:00:00 * Date/Time End: 2012-11-12T00:00:00 * Location: Bay of Kiel, Baltic Sea
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 is 2017-03-03.
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethodComment
1TypeTypeMoustaka-Gouni, Maria
2IdentificationIDMoustaka-Gouni, Maria
3TreatmentTreatMoustaka-Gouni, MariaCO2
4TreatmentTreatMoustaka-Gouni, MariaTemperature
5Sample code/labelSample labelMoustaka-Gouni, MariaCO2
6Sample code/labelSample labelMoustaka-Gouni, MariaTemperature
7Sample code/labelSample labelMoustaka-Gouni, MariaDay
8Day of experimentDOEdayMoustaka-Gouni, Maria
9Size fractionFractionMoustaka-Gouni, Maria
10BiomassBiomg/lMoustaka-Gouni, Maria
11Abundance per volumeAbund v#/mlMoustaka-Gouni, Mariacell mL-1
12RatioRatioMoustaka-Gouni, Mariarelative biomass
13RatioRatioMoustaka-Gouni, Mariarelative abundance
14pHpHPaul, CarolinNBS scale
15SalinitySalPaul, Carolin
16Temperature, waterTemp°CPaul, Carolin
17Alkalinity, totalATµmol/kgPaul, Carolin
18Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)pCO2water_SST_wetµatmPaul, Carolin
19Carbon, inorganic, dissolvedDICµmol/kgPaul, Carolin
20Carbonate system computation flagCSC flagYang, YanCalculated using seacarb after Nisumaa et al. (2010)
21pHpHYang, YanCalculated using seacarb after Nisumaa et al. (2010)total scale
22Carbon dioxideCO2µmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
23Fugacity of carbon dioxide (water) at sea surface temperature (wet air)fCO2water_SST_wetµatmYang, YanCalculated using seacarb after Nisumaa et al. (2010)
24Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)pCO2water_SST_wetµatmYang, YanCalculated using seacarb after Nisumaa et al. (2010)
25Bicarbonate ion[HCO3]-µmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
26Carbonate ion[CO3]2-µmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
27Aragonite saturation stateOmega ArgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
28Calcite saturation stateOmega CalYang, YanCalculated using seacarb after Nisumaa et al. (2010)
Size:
11746 data points

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