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Schram, Julie B; Schoenrock, Kathryn M; McClintock, James B; Amsler, Charles D; Angus, Robert A (2017): Seawater carbonate chemistry and Antarctic macroalgal biochemical composition and amphipod grazer feeding preferences [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.892654, Supplement to: Schram, JB et al. (2017): Ocean warming and acidification alter Antarctic macroalgal biochemical composition but not amphipod grazer feeding preferences. Marine Ecology Progress Series, 581, 45-56, https://doi.org/10.3354/meps12308

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Abstract:
Increased anthropogenic atmospheric CO2 concentrations have resulted in ocean warming and alterations in ocean carbonate chemistry, decreasing seawater pH (ocean acidification). The combination of ocean warming and acidification (OWA) may alter trophic interactions in marine benthic communities along the western Antarctic Peninsula (WAP). Abundant and diverse macroalgae–grazer assemblages, dominated by macroalgae (e.g. chemically defended Desmarestia anceps and D. menziesii) and gammarid amphipods (e.g. Gondogeneia antarctica), occur on the nearshore benthos along the WAP. In the present study, the amphipod G. antarctica and macroalgae D. anceps and D. menziesii were exposed for 39 and 79 d, respectively, to combinations of current and predicted near-future temperature (1.5 and 3.5°C, respectively) and pH (8.0 and 7.6, respectively). Protein and lipid levels of macroalgal tissues were quantified, and 5-way choice amphipod feeding assays were performed with lyophilized macroalgal tissues collected at time zero and following exposure to the 4 temperature-pH treatments. For D. anceps, we found a significant interactive temperature-pH effect on lipid levels and significantly lower protein levels at reduced pH. In contrast, tissues of D. menziesii exhibited significantly greater lipid levels after exposure to reduced pH, but there was no temperature effect on lipid or protein levels. Despite shifts in macroalgal biochemical composition, there were no changes in amphipod feeding preferences. Our results indicate that despite altered macroalgal nutritional quality under OWA, both macroalgae retained their ability to deter amphipod feeding. This deterrent capacity could become an important contributor to net community resistance of macroalgae-mesograzer assemblages of the WAP to predicted OWA.
Keyword(s):
Animalia; Antarctic; Antarctic; Arthropoda; Behaviour; Benthic animals; Benthos; Biomass/Abundance/Elemental composition; Chromista; Coast and continental shelf; Containers and aquaria (20-1000 L or < 1 m**2); Desmarestia anceps; Desmarestia menziesii; Gondogeneia antarctica; Laboratory experiment; Macroalgae; Ochrophyta; Polar; Single species; Species interaction; Temperature
Source:
Schram, Julie B (2017): Data from Schram et al. 2017 MEPS [dataset]. U.S. Antarctic Program Data Center, http://www.usap-dc.org/view/dataset/601062
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
Date/Time Start: 2013-03-01T00:00:00 * Date/Time End: 2013-03-31T00:00:00
Event(s):
Palmer_Station_OA * Latitude: -64.766670 * Longitude: -64.050000 * Date/Time Start: 2013-03-01T00:00:00 * Date/Time End: 2013-03-31T00:00:00 * 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 2018-07-12.
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
5Experiment durationExp durationdaysSchram, Julie B
6TreatmentTreatSchram, Julie B
7Sample IDSample IDSchram, Julie B
8Tissue, dry massTis DMmgSchram, Julie B
9DateDateSchram, Julie BProtein analyzed
10ProteinsProteinmg/mlSchram, Julie B1
11ProteinsProteinmg/mlSchram, Julie B2
12ProteinsProteinmg/mlSchram, Julie B3
13ProteinsProtein%Schram, Julie Bmg Protein /mg dry tissue
14ProteinsProtein%Schram, Julie Bmg Protein /mg dry tissue
15ProteinsProtein%Schram, Julie Bmg Protein /mg dry tissue
16ProteinsProtein%Schram, Julie Bmean
17MassMassgSchram, Julie Bvial wt before
18MassMassgSchram, Julie Bvial wt after
19LipidsLipidsµgSchram, Julie B
20LipidsLipids%Schram, Julie B
21TreatmentTreatSchram, Julie BFood supply
22IdentificationIDSchram, Julie BPod Microcosm
23IdentificationIDSchram, Julie BAlgal Microcosm
24DateDateSchram, Julie BInitial
25DateDateSchram, Julie BFinal
26Time in hoursTimehSchram, Julie BTotal
27MassMassmgSchram, Julie BInitial
28MassMassmgSchram, Julie BFinal
29MassMassmgSchram, Julie BChange
30MassMassmgSchram, Julie BCorrected
31Feeding rateFeed ratemg/hSchram, Julie BAdjusted
32Feeding rateFeed ratemg/hSchram, Julie BAdjusted/pod
33DateDateSchram, Julie BInitial, Autogenic controls
34DateDateSchram, Julie BFinal, Autogenic controls
35Time in hoursTimehSchram, Julie BTotal, Autogenic controls
36MassMassmgSchram, Julie BInitial, Autogenic controls
37MassMassmgSchram, Julie BFinal, Autogenic controls
38MassMassmgSchram, Julie BChange, Autogenic controls
39Mass changeMass chn%Schram, Julie B
40pHpHSchram, Julie BSpectrophotometrictotal scale
41pH, standard deviationpH std dev±Schram, Julie BSpectrophotometrictotal scale
42Alkalinity, totalATµmol/kgSchram, Julie BPotentiometric titration
43Alkalinity, total, standard deviationAT std dev±Schram, Julie BPotentiometric titration
44Temperature, waterTemp°CSchram, Julie B
45Temperature, water, standard deviationTemp std dev±Schram, Julie B
46SalinitySalSchram, Julie B
47Salinity, standard deviationSal std dev±Schram, Julie B
48Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)pCO2water_SST_wetµatmSchram, Julie B
49Partial pressure of carbon dioxide, standard deviationpCO2 std dev±Schram, Julie B
50Carbon, inorganic, dissolvedDICµmol/kgSchram, Julie B
51Carbon, inorganic, dissolved, standard deviationDIC std dev±Schram, Julie B
52Aragonite saturation stateOmega ArgSchram, Julie B
53Aragonite saturation state, standard deviationOmega Arg std dev±Schram, Julie B
54Calcite saturation stateOmega CalSchram, Julie B
55Calcite saturation state, standard deviationOmega Cal std dev±Schram, Julie B
56Carbonate system computation flagCSC flagYang, YanCalculated using seacarb after Nisumaa et al. (2010)
57Carbon dioxideCO2µmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
58Fugacity of carbon dioxide (water) at sea surface temperature (wet air)fCO2water_SST_wetµatmYang, YanCalculated using seacarb after Nisumaa et al. (2010)
59Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)pCO2water_SST_wetµatmYang, YanCalculated using seacarb after Nisumaa et al. (2010)
60Bicarbonate ion[HCO3]-µmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
61Carbonate ion[CO3]2-µmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
62Carbon, inorganic, dissolvedDICµmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
63Aragonite saturation stateOmega ArgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
64Calcite saturation stateOmega CalYang, YanCalculated using seacarb after Nisumaa et al. (2010)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
21313 data points

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