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Zervoudaki, Soultana; Frangoulis, Constantin; Giannoudi, Louisa; Krasakopoulou, Evangelia (2014): Seawater carbonate chemistry and egg production, hatching and metabolic rates of a Mediterranean copepod species (Acartia clausi) in a laboratory experiment. PANGAEA, https://doi.org/10.1594/PANGAEA.825021, Supplement to: Zervoudaki, S et al. (2014): Effects of low pH and raised temperature on egg production, hatching and metabolic rates of a Mediterranean copepod species (Acartia clausi) under oligotrophic conditions. Mediterranean Marine Science, 15, 74-83, https://doi.org/10.12681/mms.553

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Abstract:
This study includes the first information on the combined effect of low pH and raised temperature on egg production rate (EP), hatching success (HS), excretion and respiration of the Mediterranean copepod Acartia clausi. Adult individuals of A. clausi and fresh surface seawater were collected at a coastal station in Saronikos Gulf during April 2012. Four different conditions were applied: two different pH levels (present: 8.09 and future: 7.83) at two temperature values (present: 16°C and present+4 °C= 20°C). EP and HS success decreased significantly over the duration of exposure at future pH at both temperature conditions. However, the analysis of the combined effect of pH, T, chlorophyll a and the duration of the experiments on EP and HS revealed that ocean acidification had no discernible effect, whereas warming; food and the duration of exposure were more significant for the reproductive output of A. clausi. Temperature appeared to have a positive effect on respiration and excretion. Acidification had no clear effect on respiration, but a negative effect on the A. clausi excretion was observed. Acidification and warming resulted in the increase of the excretion rate and the increase was higher than that observed by warming only. Our findings showed that a direct effect of ocean acidification on copepod's vital rates was not obvious, except maybe in the case of excretion. Therefore, the combination of acidification with the ambient oligotrophic conditions and the warming could result in species being less able to allocate resources for coping with multiple stressors.
Further details:
Lavigne, Héloise; Gattuso, Jean-Pierre (2011): seacarb: seawater carbonate chemistry with R. R package version 2.4. https://cran.r-project.org/package=seacarb
Comment:
In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Lavigne and Gattuso, 2011) 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 2013-12-18.
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethodComment
1TreatmentTreatZervoudaki, Soultana
2IdentificationIDZervoudaki, Soultana
3SpeciesSpeciesZervoudaki, Soultana
4Temperature, waterTemp°CZervoudaki, Soultana
5SalinitySalZervoudaki, Soultana
6Light:Dark cycleL:Dhh:hhZervoudaki, Soultana
7pHpHKrasakopoulou, EvangeliaPotentiometrictotal scale
8Carbon, inorganic, dissolvedDICµmol/kgGiannoudi, LouisaCoulometric titration
9Carbon, inorganic, dissolved, standard deviationDIC std dev±Giannoudi, LouisaCoulometric titration
10Ammonia excretion per individualNH3/[NH4]+ exc/indµg/#/dayFrangoulis, Constantin
11Ammonium, excretion, standard deviation[NH4]+ exc std dev±Frangoulis, Constantin
12Respiration rate, oxygen, per individualResp O2/indµl/#/dayFrangoulis, Constantin
13Respiration rate, oxygen, standard deviationResp O2 std dev±Frangoulis, Constantin
14Egg production rate per femaleEPR#/female/dayZervoudaki, Soultana
15Egg production rate, standard deviationEPR std dev±Zervoudaki, Soultana
16Hatching rateHatching%Zervoudaki, Soultana
17Hatching rate, standard deviationHatching std dev±Zervoudaki, Soultana
18Carbon dioxideCO2µmol/kgKrasakopoulou, EvangeliaCalculated using seacarb
19Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)pCO2water_SST_wetµatmKrasakopoulou, EvangeliaCalculated using seacarb
20Bicarbonate ion[HCO3]-µmol/kgKrasakopoulou, EvangeliaCalculated using seacarb
21Carbonate ion[CO3]2-µmol/kgKrasakopoulou, EvangeliaCalculated using seacarb
22Alkalinity, totalATµmol/kgKrasakopoulou, EvangeliaCalculated using seacarb
23Carbonate system computation flagCSC flagYang, YanCalculated using seacarb after Nisumaa et al. (2010)
24Carbon dioxideCO2µmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
25Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)pCO2water_SST_wetµatmYang, YanCalculated using seacarb after Nisumaa et al. (2010)
26Fugacity of carbon dioxide (water) at sea surface temperature (wet air)fCO2water_SST_wetµatmYang, YanCalculated using seacarb after Nisumaa et al. (2010)
27Bicarbonate ion[HCO3]-µmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
28Carbonate ion[CO3]2-µmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
29Alkalinity, totalATµmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
30Aragonite saturation stateOmega ArgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
31Calcite saturation stateOmega CalYang, YanCalculated using seacarb after Nisumaa et al. (2010)
Size:
862 data points

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