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Thor, Peter; Bailey, Allison; Halsband, Claudia; Guscelli, Ella; Gorokhova, Elena; Fransson, Agneta (2016): Seawater pH predicted for the year 2100 affects the metabolic response to feeding in Copepodites of the Arctic Copepod Calanus glacialis [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.874790, Supplement to: Thor, P et al. (2016): Seawater pH Predicted for the Year 2100 Affects the Metabolic Response to Feeding in Copepodites of the Arctic Copepod Calanus glacialis. PLoS ONE, 11(12), e0168735, https://doi.org/10.1371/journal.pone.0168735

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Abstract:
Widespread ocean acidification (OA) is transforming the chemistry of the global ocean, and the Arctic is recognised as a region where the earliest and strongest impacts of OA are expected. In the present study, metabolic effects of OA and its interaction with food availability was investigated in Calanus glacialis from the Kongsfjord, West Spitsbergen. We measured metabolic rates and RNA/DNA ratios (an indicator of biosynthesis) concurrently in fed and unfed individuals of copepodite stages CII-CIII and CV subjected to two different pH levels representative of present day and the "business as usual" IPCC scenario (RCP8.5) prediction for the year 2100. The copepods responded more strongly to changes in food level than to decreasing pH, both with respect to metabolic rate and RNA/DNA ratio. However, significant interactions between effects of pH and food level showed that effects of pH and food level act in synergy in copepodites of C. glacialis. While metabolic rates in copepodites stage CII-CIII increased by 78% as a response to food under present day conditions (high pH), the increase was 195% in CII-CIIIs kept at low pH-a 2.5 times greater increase. This interaction was absent for RNA/DNA, so the increase in metabolic rates were clearly not a reaction to changing biosynthesis at low pH per se but rather a reaction to increased metabolic costs per unit of biosynthesis. Interestingly, we did not observe this difference in costs of growth in stage CV. A 2.5 times increase in metabolic costs of growth will leave the copepodites with much less energy for growth. This may infer significant changes to the C. glacialis population during future OA.
Keyword(s):
Animalia; Arctic; Arthropoda; Bottles or small containers/Aquaria (<20 L); Calanus glacialis; Coast and continental shelf; Laboratory experiment; Other; Pelagos; Polar; Respiration; Single species; Zooplankton
Further details:
Gattuso, Jean-Pierre; Epitalon, Jean-Marie; Lavigne, Héloïse; Orr, James C; Gentili, Bernard; Proye, Aurélien; Soetaert, Karline; Rae, James (2016): seacarb: seawater carbonate chemistry with R. R package version 3.1. https://cran.r-project.org/package=seacarb
Project(s):
Ocean Acidification International Coordination Centre (OA-ICC)
Coverage:
Latitude: 79.000000 * Longitude: 11.700000
Date/Time Start: 2014-07-01T00:00:00 * Date/Time End: 2014-07-31T00:00:00
Event(s):
Svalbard_OA * Latitude: 79.000000 * Longitude: 11.700000 * Date/Time Start: 2014-07-01T00:00:00 * Date/Time End: 2014-07-31T00:00:00 * Method/Device: Experiment (EXP)
Comment:
In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Gattuso et al, 2016) 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 2017-04-21.
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1TypeTypeThor, Peterstudy
2SpeciesSpeciesThor, Peter
3Registration number of speciesReg spec noThor, Peter
4Uniform resource locator/link to referenceURL refThor, PeterWoRMS Aphia ID
5ExperimentExpThor, Peter
6TreatmentTreatThor, Peter
7TreatmentTreatThor, Peter
8Metabolic rate of carbon per carbon massMR Cµg/µg/dayThor, Peter
9RNA/DNA ratioRNA/DNAThor, Peter
10DNA content per individualDNA content/indµg/#Thor, Petergut DNA contents
11Temperature, waterTemp°CThor, Peter
12Temperature, water, standard deviationTemp std dev±Thor, Peter
13SalinitySalThor, Peter
14Salinity, standard deviationSal std dev±Thor, Peter
15Alkalinity, totalATµmol/kgThor, PeterPotentiometric titration
16Alkalinity, total, standard deviationAT std dev±Thor, PeterPotentiometric titration
17Carbon, inorganic, dissolvedDICµmol/kgThor, PeterCoulometric titration
18Carbon, inorganic, dissolved, standard deviationDIC std dev±Thor, PeterCoulometric titration
19pHpHThor, PeterCalculated using CO2SYStotal scale
20pH, standard deviationpH std dev±Thor, PeterCalculated using CO2SYStotal scale
21Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)pCO2water_SST_wetµatmThor, PeterCalculated using CO2SYS
22Partial pressure of carbon dioxide, standard deviationpCO2 std dev±Thor, PeterCalculated using CO2SYS
23Carbonate system computation flagCSC flagYang, YanCalculated using seacarb after Nisumaa et al. (2010)
24pHpHYang, YanCalculated using seacarb after Nisumaa et al. (2010)total scale
25Carbon dioxideCO2µmol/kgYang, 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)
27Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)pCO2water_SST_wetµatmYang, YanCalculated using seacarb after Nisumaa et al. (2010)
28Bicarbonate ion[HCO3]-µmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
29Carbonate ion[CO3]2-µmol/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)
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
9367 data points

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