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Schram, Julie B; Schoenrock, Kathryn M; McClintock, James B; Amsler, Charles D; Angus, Robert A (2016): Seawater acidification more than warming presents a challenge for two Antarctic macroalgal-associated amphipods [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.870407

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Abstract:
Elevated atmospheric pCO2 concentrations are triggering seawater pH reductions and seawater temperature increases along the western Antarctic Peninsula (WAP). These factors in combination have the potential to influence organisms in an antagonistic, additive, or synergistic manner. The amphipods Gondogeneia antarctica and Paradexamine fissicauda represent prominent members of macroalgal-associated mesograzer assemblages of the WAP. Our primary objective was to investigate amphipod behavioral and physiological responses to reduced seawater pH and elevated temperature to evaluate potential cascading ecological impacts. For 90 d, amphipods were exposed to combinations of seawater conditions based on present ambient (pH 8.0, 1.5°C) and predicted end-of-century conditions (pH 7.6, 3.5°C). We recorded survival, molt frequency, and macroalgal consumption rates as well as change in wet mass and proximate body composition (protein and lipid). Survival for both species declined significantly at reduced pH and co-varied with molt frequency. Consumption rates in G. antarctica were significantly higher at reduced pH and there was an additive pH-temperature effect on consumption rates in P. fissicauda. Body mass was reduced for G. antarctica at elevated temperature, but there was no significant effect of pH or temperature on body mass in P. fissicauda. Exposure to the pH or temperature levels tested did not induce significant changes in whole body biochemical composition of G. antarctica, but exposure to elevated temperature resulted in a significant increase in whole body protein content of P. fissicauda. Our study indicates that while elevated temperature causes sub-lethal impacts on both species of amphipods, reduced pH causes significant mortality.
Keyword(s):
Animalia; Antarctic; Arthropoda; Behaviour; Benthic animals; Benthos; Bottles or small containers/Aquaria (<20 L); Coast and continental shelf; Gondogeneia antarctica; Growth/Morphology; Laboratory experiment; Mortality/Survival; Paradexamine fissicauda; Polar; Single species; Temperature
Related to:
Schram, Julie B; Schoenrock, Kathryn M; McClintock, James B; Amsler, Charles D; Angus, Robert A (2016): Seawater acidification more than warming presents a challenge for two Antarctic macroalgal‑associated amphipods. Marine Ecology Progress Series, 554, 81-97, https://doi.org/10.3354/meps11814
Original version:
Schram, Julie B (2016): NSF-ANT10-41022 [dataset]. U.S. Antarctic Program Data Center, http://www.usap-data.org/entry/NSF-ANT10-41022/2016-07-06_09-49-03/
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
Coverage:
Latitude: -64.766670 * Longitude: -64.050000
Event(s):
Palmer_station * Latitude: -64.766670 * Longitude: -64.050000 * Method/Device: Monitoring station (MONS)
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 is 2016-12-29.
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1TypeTypeSchram, Julie Bstudy
2SpeciesSpeciesSchram, Julie B
3Registration number of speciesReg spec noSchram, Julie B
4Uniform resource locator/link to referenceURL refSchram, Julie BWoRMS Aphia ID
5DateDateSchram, Julie B
6Consumption rate per individualCons rate per indµg/#/hSchram, Julie Bper Amphipod
7TreatmentTreatSchram, Julie B
8Incubation durationInc durweeksSchram, Julie B
9IndividualsInd#Schram, Julie Bdied
10IndividualsInd#Schram, Julie Bmolted
11Sample IDSample IDSchram, Julie B
12Wet massWet mgSchram, Julie B
13Dry massDry mgSchram, Julie B
14IndividualsInd#Schram, Julie Bamphipods
15ProteinsProtein%Schram, Julie Bmean % protein per pod
16LipidsLipids%Schram, Julie Bmean % lipid per pod
17pHpHSchram, Julie BSpectrophotometrictotal scale
18pH, standard deviationpH std dev±Schram, Julie BSpectrophotometrictotal scale
19Alkalinity, totalATµmol/kgSchram, Julie BPotentiometric titration
20Alkalinity, total, standard deviationAT std dev±Schram, Julie BPotentiometric titration
21Temperature, waterTemp°CSchram, Julie B
22Temperature, water, standard deviationTemp std dev±Schram, Julie B
23SalinitySalSchram, Julie B
24Salinity, standard deviationSal std dev±Schram, Julie B
25Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)pCO2water_SST_wetµatmSchram, Julie BCalculated using CO2calc
26Partial pressure of carbon dioxide, standard deviationpCO2 std dev±Schram, Julie BCalculated using CO2calc
27Carbon, inorganic, dissolvedDICµmol/kgSchram, Julie BCalculated using CO2calc
28Carbon, inorganic, dissolved, standard deviationDIC std dev±Schram, Julie BCalculated using CO2calc
29Aragonite saturation stateOmega ArgSchram, Julie BCalculated using CO2calc
30Aragonite saturation state, standard deviationOmega Arg std dev±Schram, Julie BCalculated using CO2calc
31Calcite saturation stateOmega CalSchram, Julie BCalculated using CO2calc
32Calcite saturation state, standard deviationOmega Cal std dev±Schram, Julie BCalculated using CO2calc
33Carbonate system computation flagCSC flagYang, YanCalculated using seacarb after Nisumaa et al. (2010)
34Carbon dioxideCO2µmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
35Fugacity of carbon dioxide (water) at sea surface temperature (wet air)fCO2water_SST_wetµatmYang, YanCalculated using seacarb after Nisumaa et al. (2010)
36Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)pCO2water_SST_wetµatmYang, YanCalculated using seacarb after Nisumaa et al. (2010)
37Bicarbonate ion[HCO3]-µmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
38Carbonate ion[CO3]2-µmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
39Carbon, inorganic, dissolvedDICµmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
40Aragonite saturation stateOmega ArgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
41Calcite saturation stateOmega CalYang, YanCalculated using seacarb after Nisumaa et al. (2010)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
23366 data points

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