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Lischka, Silke; Büdenbender, Jan; Boxhammer, Tim; Riebesell, Ulf (2011): Seawater carbonate chemistry and biological processes of Limacina helicina during experiments, 2011. doi:10.1594/PANGAEA.761910,
Supplement to: Lischka, S et al. (2011): Impact of ocean acidification and elevated temperatures on early juveniles of the polar shelled pteropod Limacina helicina: mortality, shell degradation, and shell growth. Biogeosciences, 8(4), 919-932, doi:10.5194/bg-8-919-2011

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Abstract:
Due to their aragonitic shell, thecosome pteropods may be particularly vulnerable to ocean acidification driven by anthropogenic CO2 emissions. This applies specifically to species inhabiting Arctic surface waters that are projected to become temporarily and locally undersaturated with respect to aragonite as early as 2016. This study investigated the effects of rising partial pressure of CO2 (pCO2) and elevated temperature on pre-winter juveniles of the polar pteropod Limacina helicina. After a 29 day experiment in September/October 2009 at three different temperatures and under pCO2 scenarios projected for this century, mortality, shell degradation, shell diameter and shell increment were investigated. Temperature and pCO2 had a significant effect on mortality, but temperature was the overriding factor. Shell diameter, shell increment and shell degradation were significantly impacted by pCO2 but not by temperature. Mortality was 46% higher at 8 °C than at in situ temperature (3 °C), and 14% higher at 1100 ?atm than at 230 ?atm. Shell diameter and increment were reduced by 10 and 12% at 1100 ?atm and 230 ?atm, respectively, and shell degradation was 41% higher at elevated compared to ambient pCO2. We conclude that pre-winter juveniles will be negatively affected by both rising temperature and pCO2 which may result in a possible decline in abundance of the overwintering population, the basis for next year's reproduction.
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).
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethodComment
1Experimental treatmentExp trtmLischka, Silke
2SalinitySalLischka, Silke
3Temperature, waterTemp°CLischka, SilkeStart
4Temperature, waterTemp°CLischka, SilkeEnd
5Alkalinity, totalATµmol/kgLischka, SilkeMetrohm Titrando titratorStart
6Alkalinity, totalATµmol/kgLischka, SilkeMetrohm Titrando titratorEnd
7pHpHLischka, SilkepH meter (Metrohm, 826 pH mobile)Total scale; Start
8pHpHLischka, SilkepH meter (Metrohm, 826 pH mobile)Total scale; End
9Carbon, inorganic, dissolvedDICµmol/kgLischka, SilkeContinuous Flow Analysis (CFA)Start
10Carbon, inorganic, dissolvedDICµmol/kgLischka, SilkeContinuous Flow Analysis (CFA)End
11Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)pCO2water_SST_wetµatmLischka, SilkeCalculated using CO2SYSStart
12Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)pCO2water_SST_wetµatmLischka, SilkeCalculated using CO2SYSEnd
13Aragonite saturation stateOmega ArgLischka, SilkeCalculated using CO2SYSStart
14Aragonite saturation stateOmega ArgLischka, SilkeCalculated using CO2SYSEnd
15SiliconSimmol/kgLischka, SilkeStart
16SiliconSimmol/kgLischka, Silke
17Sample IDSample IDLischka, Silke
18MortalityMortality%Lischka, Silke
19Limacina helicina, shell increment versus diameterL. helicina shell incr/diamµmLischka, SilkeStereomicroscopy (Leica MZ 16 F)
20Limacina helicina, lengthL. helicina lmmLischka, SilkeStereomicroscopy (Leica MZ 16 F)
21Limacina helicina, shell degradationL. helicina shell degrLischka, SilkeStereomicroscopy (Leica MZ 16 F)Milky
22Limacina helicina, shell degradationL. helicina shell degrLischka, SilkeStereomicroscopy (Leica MZ 16 F)Brownish
23Limacina helicina, shell degradationL. helicina shell degrLischka, SilkeStereomicroscopy (Leica MZ 16 F)Scars
24Limacina helicina, shell degradationL. helicina shell degrLischka, SilkeStereomicroscopy (Leica MZ 16 F)Corrosion
25Limacina helicina, shell degradationL. helicina shell degrLischka, SilkeStereomicroscopy (Leica MZ 16 F)Perforations
26Carbonate system computation flagCSC flagNisumaa, Anne-MarinCalculated using seacarb after Nisumaa et al. (2010)
27Carbon dioxideCO2µmol/kgNisumaa, Anne-MarinCalculated using seacarb after Nisumaa et al. (2010)
28Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)pCO2water_SST_wetµatmNisumaa, Anne-MarinCalculated using seacarb after Nisumaa et al. (2010)
29Fugacity of carbon dioxide (water) at sea surface temperature (wet air)fCO2water_SST_wetµatmNisumaa, Anne-MarinCalculated using seacarb after Nisumaa et al. (2010)
30Bicarbonate ion[HCO3]-µmol/kgNisumaa, Anne-MarinCalculated using seacarb after Nisumaa et al. (2010)
31Carbonate ion[CO3]2-µmol/kgNisumaa, Anne-MarinCalculated using seacarb after Nisumaa et al. (2010)
32Carbon, inorganic, dissolvedDICµmol/kgNisumaa, Anne-MarinCalculated using seacarb after Nisumaa et al. (2010)
33Aragonite saturation stateOmega ArgNisumaa, Anne-MarinCalculated using seacarb after Nisumaa et al. (2010)
34Calcite saturation stateOmega CalNisumaa, Anne-MarinCalculated using seacarb after Nisumaa et al. (2010)
Size:
2461 data points

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