Data Description

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Citation:
Lischka, S et al. (2011): Seawater carbonate chemistry and biological processes of Limacina helicina during experiments, 2011. doi:10.1594/PANGAEA.761910,
Supplement to: Lischka, Silke; Büdenbender, Jan; Boxhammer, Tim; Riebesell, Ulf (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
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.
Project(s):
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 treatment *Exp trtmLischka, Silke *
2Salinity *SalLischka, Silke *
3Temperature, water *Temp°CLischka, Silke *Start
4Temperature, water *Temp°CLischka, Silke *End
5Alkalinity, total *ATµmol/kgLischka, Silke *Metrohm Titrando titrator *Start
6Alkalinity, total *ATµmol/kgLischka, Silke *Metrohm Titrando titrator *End
7pH *pHLischka, Silke *pH meter (Metrohm, 826 pH mobile) *Total scale; Start
8pH *pHLischka, Silke *pH meter (Metrohm, 826 pH mobile) *Total scale; End
9Carbon, inorganic, dissolved *DICµmol/kgLischka, Silke *Continuous Flow Analysis (CFA) *Start
10Carbon, inorganic, dissolved *DICµmol/kgLischka, Silke *Continuous Flow Analysis (CFA) *End
11Partial pressure of carbon dioxide (water) at sea surface temperature (wet air) *pCO2water_SST_wetµatmLischka, Silke *Calculated using CO2SYS *Start
12Partial pressure of carbon dioxide (water) at sea surface temperature (wet air) *pCO2water_SST_wetµatmLischka, Silke *Calculated using CO2SYS *End
13Aragonite saturation state *Omega ArgLischka, Silke *Calculated using CO2SYS *Start
14Aragonite saturation state *Omega ArgLischka, Silke *Calculated using CO2SYS *End
15Silicon *Simmol/kgLischka, Silke *Start
16Silicon *Simmol/kgLischka, Silke *
17Sample ID *Sample IDLischka, Silke *
18Mortality *Mortality%Lischka, Silke *
19Limacina helicina, shell increment versus diameter *L. helicina shell incr/diamµmLischka, Silke *Stereomicroscopy (Leica MZ 16 F) *
20Limacina helicina, length *L. helicina lmmLischka, Silke *Stereomicroscopy (Leica MZ 16 F) *
21Limacina helicina, shell degradation *L. helicina shell degrLischka, Silke *Stereomicroscopy (Leica MZ 16 F) *Milky
22Limacina helicina, shell degradation *L. helicina shell degrLischka, Silke *Stereomicroscopy (Leica MZ 16 F) *Brownish
23Limacina helicina, shell degradation *L. helicina shell degrLischka, Silke *Stereomicroscopy (Leica MZ 16 F) *Scars
24Limacina helicina, shell degradation *L. helicina shell degrLischka, Silke *Stereomicroscopy (Leica MZ 16 F) *Corrosion
25Limacina helicina, shell degradation *L. helicina shell degrLischka, Silke *Stereomicroscopy (Leica MZ 16 F) *Perforations
26Carbonate system computation flag *CSC flagNisumaa, Anne-Marin *Calculated using seacarb after Nisumaa et al. (2010) *
27Carbon dioxide *CO2µmol/kgNisumaa, Anne-Marin *Calculated using seacarb after Nisumaa et al. (2010) *
28Partial pressure of carbon dioxide (water) at sea surface temperature (wet air) *pCO2water_SST_wetµatmNisumaa, Anne-Marin *Calculated using seacarb after Nisumaa et al. (2010) *
29Fugacity of carbon dioxide (water) at sea surface temperature (wet air) *fCO2water_SST_wetµatmNisumaa, Anne-Marin *Calculated using seacarb after Nisumaa et al. (2010) *
30Bicarbonate ion *[HCO3]-µmol/kgNisumaa, Anne-Marin *Calculated using seacarb after Nisumaa et al. (2010) *
31Carbonate ion *[CO3]2-µmol/kgNisumaa, Anne-Marin *Calculated using seacarb after Nisumaa et al. (2010) *
32Carbon, inorganic, dissolved *DICµmol/kgNisumaa, Anne-Marin *Calculated using seacarb after Nisumaa et al. (2010) *
33Aragonite saturation state *Omega ArgNisumaa, Anne-Marin *Calculated using seacarb after Nisumaa et al. (2010) *
34Calcite saturation state *Omega CalNisumaa, Anne-Marin *Calculated using seacarb after Nisumaa et al. (2010) *
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