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Eberlein, Tim; Van de Waal, Dedmer B; Brandenburg, Karen; John, Uwe; Voss, Maren; Achterberg, Eric P; Rost, Björn (2016): Interactive effects of ocean acidification and nitrogen limitation on two bloom-forming dinoflagellate species. PANGAEA, https://doi.org/10.1594/PANGAEA.868682, Supplement to: Eberlein, T et al. (2016): Interactive effects of ocean acidification and nitrogen limitation on two bloom-forming dinoflagellate species. Marine Ecology Progress Series, 543, 127-140, https://doi.org/10.3354/meps11568

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Abstract:
Global climate change involves an increase in oceanic CO2 concentrations as well as thermal stratification of the water column, thereby reducing nutrient supply from deep to surface waters. Changes in inorganic carbon (C) or nitrogen (N) availability have been shown to affect marine primary production, yet little is known about their interactive effects. To test for these effects, we conducted continuous culture experiments under N limitation and exposed the bloom-forming dinoflagellate species Scrippsiella trochoidea and Alexandrium fundyense (formerly A. tamarense) to CO2 partial pressures ( pCO2) ranging between 250 and 1000 µatm. Ratios of particulate organic carbon (POC) to organic nitrogen (PON) were elevated under N limitation, but also showed a decreasing trend with increasing pCO2. PON production rates were highest and affinities for dissolved inorganic N were lowest under elevated pCO2, and our data thus demonstrate a CO2-dependent trade-off in N assimilation. In A. fundyense, quotas of paralytic shellfish poisoning toxins were lowered under N limitation, but the offset to those obtained under N-replete conditions became smaller with increasing pCO2. Consequently, cellular toxicity under N limitation was highest under elevated pCO2. All in all, our observations imply reduced N stress under elevated pCO2, which we attribute to a reallocation of energy from C to N assimilation as a consequence of lowered costs in C acquisition. Such interactive effects of ocean acidification and nutrient limitation may favor species with adjustable carbon concentrating mechanisms and have consequences for their competitive success in a future ocean.
Further details:
Gattuso, Jean-Pierre; Epitalon, Jean-Marie; Lavigne, Héloise; 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
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 2016-11-22.
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethodComment
1TypeTypeVan de Waal, Dedmer Bstudy
2SpeciesSpeciesVan de Waal, Dedmer B
3Registration number of speciesReg spec noVan de Waal, Dedmer B
4Uniform resource locator/link to referenceURL refVan de Waal, Dedmer BWoRMS Aphia ID
5ReplicateReplicateVan de Waal, Dedmer B
6Particulate organic carbon/particulate organic nitrogen ratioPOC/PONVan de Waal, Dedmer B
7Carbon, organic, particulate, per cellPOCpg/#Van de Waal, Dedmer B
8Nitrogen, organic, particulate, per cellPONpg/#Van de Waal, Dedmer B
9Chlorophyll a per cellChl apg/#Van de Waal, Dedmer B
10Carbon, organic, particulate per chlorophyll aPOC/Chl aµmol/mgVan de Waal, Dedmer B
11Cell biovolumeCell biovolµm3Van de Waal, Dedmer B
12Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)pCO2water_SST_wetµatmVan de Waal, Dedmer BCalculated using CO2SYS
13Partial pressure of carbon dioxide, standard deviationpCO2 std dev±Van de Waal, Dedmer BCalculated using CO2SYS
14Cellular paralytic shellfish toxin, totalCell PSTpg/#Van de Waal, Dedmer B
15Cellular paralytic shellfish toxin, total, standard deviationCell PST std dev±Van de Waal, Dedmer B
16Gonyautoxins 1, 4GTX1,4%Van de Waal, Dedmer B
17Gonyautoxins 1, 4, standard deviationGTX1,4 std dev±Van de Waal, Dedmer B
18Neurotoxin saxitoxinSTX%Van de Waal, Dedmer B
19Neurotoxin saxitoxin, standard deviationSTX std dev±Van de Waal, Dedmer B
20Gonyautoxins 2, 3GTX2,3%Van de Waal, Dedmer B
21Gonyautoxins 2, 3, standard deviationGTX2,3 std dev±Van de Waal, Dedmer B
22Di-sulfated toxins C1+C2Di-sulfated toxins C1+C2%Van de Waal, Dedmer B
23Di-sulfated toxins C1+C2, standard deviationDi-sulfated toxins C1+C2 std dev±Van de Waal, Dedmer B
24NeosaxitoxinNEO%Van de Waal, Dedmer B
25Neosaxitoxin, standard deviationNEO std dev±Van de Waal, Dedmer B
26Toxicity, cellularCell toxicitypg/#Van de Waal, Dedmer BSTXeq
27Toxicity, cellular, standard deviationCell toxicity std dev±Van de Waal, Dedmer BSTXeq
28Cell densityCells#/mlVan de Waal, Dedmer B
29Cell density, standard deviationCells std dev±Van de Waal, Dedmer B
30Nitrogen, inorganic, dissolvedDINµmol/lVan de Waal, Dedmer Bresidual
31Nitrogen, inorganic, dissolved, standard deviationDIN std dev±Van de Waal, Dedmer Bresidual
32Temperature, waterTemp°CVan de Waal, Dedmer B
33SalinitySalVan de Waal, Dedmer B
34Carbon, inorganic, dissolvedDICµmol/lVan de Waal, Dedmer B
35Alkalinity, totalATµmol/lVan de Waal, Dedmer B
36pHpHVan de Waal, Dedmer BNBS scale
37Carbonate system computation flagCSC flagYang, YanCalculated using seacarb after Nisumaa et al. (2010)
38pHpHYang, YanCalculated using seacarb after Nisumaa et al. (2010)total scale
39Carbon dioxideCO2µmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
40Fugacity of carbon dioxide (water) at sea surface temperature (wet air)fCO2water_SST_wetµatmYang, YanCalculated using seacarb after Nisumaa et al. (2010)
41Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)pCO2water_SST_wetµatmYang, YanCalculated using seacarb after Nisumaa et al. (2010)
42Bicarbonate ion[HCO3]-µmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
43Carbonate ion[CO3]2-µmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
44Carbon, inorganic, dissolvedDICµmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
45Alkalinity, totalATµmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
46Aragonite saturation stateOmega ArgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
47Calcite saturation stateOmega CalYang, YanCalculated using seacarb after Nisumaa et al. (2010)
Size:
880 data points

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