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Pansch, Christian; Schlegel, Peter; Havenhand, Jonathan N (2014): Larval development of the barnacle Amphibalanus improvisus responds variably but robustly to near-future ocean acidification. PANGAEA, https://doi.org/10.1594/PANGAEA.831430, Supplement to: Pansch, C et al. (2013): Larval development of the barnacle Amphibalanus improvisus responds variably but robustly to near-future ocean acidification. ICES Journal of Marine Science, 70(4), 805-811, https://doi.org/10.1093/icesjms/fst092

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Abstract:
Increasing atmospheric CO2 decreases seawater pH in a phenomenon known as ocean acidification. In two separate experiments we found that larval development of the barnacle Amphibalanus (Balanus) improvisus was not significantly affected by the level of reduced pH that has been projected for the next 150 years. After 3 and 6 days of incubation, we found no consistent effects of reduced pH on developmental speed or larval size at pH 7.8 compared with the control pH of 8.1. After 10 days of incubation, there were no net changes in survival or overall development of larvae raised at pH 7.8 or 7.6 compared with the control pH of 8.0. In all cases, however, there was significant variation in responses between replicate batches (parental genotypes) of larvae, with some batches responding positively to reduced pH. Our results suggest that the non-calcifying larval stages of A. improvisus are generally tolerant to near-future levels of ocean acidification. This result is in line with findings for other barnacle species and suggests that barnacles do not show the greater sensitivity to ocean acidification in early life history reported for other invertebrate species. Substantial genetic variability in response to low pH may confer adaptive benefits under future ocean acidification.
Keyword(s):
Amphibalanus improvisus; Animalia; Arthropoda; Baltic Sea; Bottles or small containers/Aquaria ( 20 L); Coast and continental shelf; Growth/Morphology; Laboratory experiment; Mortality/Survival; Pelagos; Single species; Temperate; Zooplankton
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 2014-02-11.
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethodComment
1SpeciesSpeciesPansch, Christian
2FigureFigPansch, Christian
3TreatmentTreatPansch, Christian
4BatchBatchPansch, Christian
5SurvivalSurvival%Pansch, ChristianSurvival (LnRR)
6VarianceVarPansch, Christianv Survival
7Confidence intervalCIPansch, Christian95% Survival
8Larval developmentLarval developcodePansch, ChristianDevelopment (LnRR)
9VarianceVarPansch, Christianv development
10Confidence intervalCIPansch, Christian95% development
11Incubation durationInc durdaysPansch, ChristianIncubuation day
12StageStagePansch, Christian
13Larval stagesLarva%Pansch, ChristianPercentage of larvae
14Larval stagesLarva%Pansch, ChristianPercentage of larvae (LnRR)
15VarianceVarPansch, Christianv perc larvae
16Confidence intervalCIPansch, Christian95% perc larvae
17Length, totalTLmmPansch, ChristianTotal length (LnRR)
18VarianceVarPansch, Christianv length
19Confidence intervalCIPansch, Christian95% length
20Length, totalTLmmPansch, ChristianCarapace length
21VarianceVarPansch, Christianv Carapace length
22Confidence intervalCIPansch, Christian95% Carapace length
23Alkalinity, totalATµmol/kgPansch, Christian
24pHpHPansch, ChristianNBS scale
25Alkalinity, total, standard deviationAT std dev±Pansch, Christian
26Temperature, waterTemp°CPansch, Christian
27SalinitySalPansch, Christian
28Carbonate system computation flagCSC flagYang, YanCalculated using seacarb after Nisumaa et al. (2010)
29pHpHYang, YanCalculated using seacarb after Nisumaa et al. (2010)total scale
30Carbon dioxideCO2µmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
31Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)pCO2water_SST_wetµatmYang, YanCalculated using seacarb after Nisumaa et al. (2010)
32Fugacity of carbon dioxide (water) at sea surface temperature (wet air)fCO2water_SST_wetµatmYang, YanCalculated using seacarb after Nisumaa et al. (2010)
33Bicarbonate ion[HCO3]-µmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
34Carbonate ion[CO3]2-µmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
35Carbon, inorganic, dissolvedDICµmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
36Aragonite saturation stateOmega ArgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
37Calcite saturation stateOmega CalYang, YanCalculated using seacarb after Nisumaa et al. (2010)
Size:
4963 data points

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