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Gutow, Lars; Rahman, Mohammed Mofizur; Bartl, Kevin; Saborowski, Reinhard; Bartsch, Inka; Wiencke, Christian (2014): Ocean acidification affects growth but not nutritional quality of the seaweed Fucus vesiculosus (Phaeophyceae, Fucales). PANGAEA, https://doi.org/10.1594/PANGAEA.835334, Supplement to: Gutow, L et al. (2014): Ocean acidification affects growth but not nutritional quality of the seaweed Fucus vesiculosus (Phaeophyceae, Fucales). Journal of Experimental Marine Biology and Ecology, 453, 84-90, https://doi.org/10.1016/j.jembe.2014.01.005

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Abstract:
Understanding the ecological implications of global climate change requires investigations of not only the direct effects of environmental change on species performance but also indirect effects that arise from altered species interactions. We performed CO2 perturbation experiments to investigate the effects of ocean acidification on the trophic interaction between the brown seaweed Fucus vesiculosus and the herbivorous isopod Idotea baltica. We predicted faster growth of F. vesiculosus at elevated CO2-concentrations and higher carbon content of the algal tissue. We expected that I. baltica has different consumption rates on algae that have been grown at different CO2 levels and that the isopods remove surplus carbon metabolically by enhanced respiration. Surprisingly, growth of F. vesiculosus as well as the C:N-ratio of the algal tissue were reduced at high CO2-levels. The changes in the elemental composition had no effect on the consumption rates and the respiration of the herbivores. An additional experiment showed that consumption of F. vesiculosus by the isopod Idotea emarginata was independent of ocean acidification and temperature. Our results could not reveal any effects of ocean acidification on the per capita strength of the trophic interaction between F. vesiculosus and its consumers. However, reduced growth of the algae at high CO2-concentrations might reduce the capability of the seaweed to compensate losses due to intense herbivory.
Further details:
Lavigne, Héloise; Epitalon, Jean-Marie; Gattuso, Jean-Pierre (2014): seacarb: seawater carbonate chemistry with R. R package version 3.0. 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 et al, 2014) 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 2014-08-28.
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethodComment
1SpeciesSpeciesGutow, Lars
2ExperimentExpGutow, Lars
3FigureFigGutow, Lars
4Temperature, waterTemp°CGutow, Lars
5TreatmentTreatGutow, Lars
6ReplicateReplicateGutow, Lars
7Incubation durationInc durdaysGutow, Lars
8MassMassgGutow, Larsalgal tips
9Carbon/Nitrogen ratioC/NGutow, Lars
10Carbon/Phosphorus ratioC/PGutow, Lars
11Nitrogen/Phosphorus ratioN/PGutow, Lars
12MassMassgGutow, Larsfood initial
13MassMassgGutow, Larsfood final
14MassMassgGutow, Larscontrol initial
15MassMassgGutow, Larscontrol final
16MassMassgGutow, Larsgrazer
17Food consumptionFood cong/g/dayGutow, Lars
18Respiration rate, oxygenResp O2µg/mg/hGutow, Lars
19pHpHGutow, LarsPotentiometricNBS scale
20pH, standard deviationpH std dev±Gutow, LarsPotentiometricNBS scale
21pHpHGutow, LarsCalculatedtotal scale, measured at 25 °C
22pH, standard deviationpH std dev±Gutow, LarsCalculatedtotal scale, measured at 25 °C
23SalinitySalGutow, Lars
24Salinity, standard deviationSal std dev±Gutow, Lars
25Alkalinity, totalATµmol/kgGutow, LarsPotentiometric titration
26Alkalinity, total, standard deviationAT std dev±Gutow, LarsPotentiometric titration
27Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)pCO2water_SST_wetµatmGutow, LarsCalculated using CO2SYS
28Partial pressure of carbon dioxide, standard deviationpCO2 std dev±Gutow, LarsCalculated using CO2SYS
29Carbon dioxideCO2µmol/kgGutow, LarsCalculated using CO2SYS
30Carbon dioxide, standard deviationCO2 std dev±Gutow, LarsCalculated using CO2SYS
31Carbonate ion[CO3]2-µmol/kgGutow, LarsCalculated using CO2SYS
32Carbonate ion, standard deviation[CO3]2- std dev±Gutow, LarsCalculated using CO2SYS
33Bicarbonate ion[HCO3]-µmol/kgGutow, LarsCalculated using CO2SYS
34Bicarbonate ion, standard deviation[HCO3]- std dev±Gutow, LarsCalculated using CO2SYS
35Carbonate system computation flagCSC flagYang, YanCalculated using seacarb after Nisumaa et al. (2010)
36pHpHYang, YanCalculated using seacarb after Nisumaa et al. (2010)total scale
37Carbon dioxideCO2µmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
38Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)pCO2water_SST_wetµatmYang, YanCalculated using seacarb after Nisumaa et al. (2010)
39Fugacity of carbon dioxide (water) at sea surface temperature (wet air)fCO2water_SST_wetµatmYang, YanCalculated using seacarb after Nisumaa et al. (2010)
40Bicarbonate ion[HCO3]-µmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
41Carbonate ion[CO3]2-µmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
42Carbon, inorganic, dissolvedDICµmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
43Aragonite saturation stateOmega ArgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
44Calcite saturation stateOmega CalYang, YanCalculated using seacarb after Nisumaa et al. (2010)
Size:
8024 data points

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