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Unger, Juliane; Endres, Sonja; Wannicke, Nicola; Engel, Anja; Voss, Maren; Nausch, Günther; Nausch, Monika (2013): Response of Nodularia spumigena to pCO2 - Part 3: Turnover of phosphorus compounds. doi:10.1594/PANGAEA.830881,
Supplement to: Unger, J et al. (2013): Response of Nodularia spumigena to pCO2-Part 3: Turnover of phosphorus compounds. Biogeosciences, 10(3), 1483-1499, doi:10.5194/bg-10-1483-2013

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Abstract:
Diazotrophic cyanobacteria often form extensive summer blooms in the Baltic Sea driving their environment into phosphate limitation. One of the main species is the heterocystous cyanobacterium Nodularia spumigena. N. spumigena exhibits accelerated uptake of phosphate through the release of the exoenzyme alkaline phosphatase that also serves as an indicator of the hydrolysis of dissolved organic phosphorus (DOP). The present study investigated the utilization of DOP and its compounds (e.g. ATP) by N. spumigena during growth under varying CO2 concentrations, in order to estimate potential consequences of ocean acidification on the cell's supply with phosphorus. Cell growth, phosphorus pool fractions, and four DOP-compounds (ATP, DNA, RNA, and phospholipids) were determined in three set-ups with different CO2 concentrations (341, 399, and 508 µatm) during a 15-day batch experiment. The results showed rapid depletion of dissolved inorganic phosphorus (DIP) in all pCO2 treatments while DOP utilization increased with elevated pCO2, in parallel with the growth stimulation of N. spumigena. During the growth phase, DOP uptake was enhanced by a factor of 1.32 at 399 µatm and of 2.25 at 508 µatm compared to the lowest pCO2 concentration. Among the measured DOP compounds, none was found to accumulate preferentially during the incubation or in response to a specific pCO2 treatment. However, at the beginning 61.9 ± 4.3% of the DOP were not characterized but comprised the most highly utilized fraction. This is demonstrated by the decrement of this fraction to 27.4 ± 9.9% of total DOP during the growth phase, especially in response to the medium and high pCO2 treatment. Our results indicate a stimulated growth of diazotrophic cyanobacteria at increasing CO2 concentrations that is accompanied by increasing utilization of DOP as an alternative P source.
Further details:
Lavigne, Héloise; Gattuso, Jean-Pierre (2011): seacarb: seawater carbonate chemistry with R. R package version 2.4. https://cran.r-project.org/package=seacarb
Coverage:
Date/Time Start: 2010-03-29T00:00:00 * Date/Time End: 2010-04-13T00:00:00
Comment:
In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Lavigne and Gattuso, 2011) 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 2014-03-21.
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethodComment
1SpeciesSpeciesUnger, Juliane
2DATE/TIMEDate/TimeGeocode
3Incubation durationInc durdayUnger, Juliane
4Incubation durationInc durhUnger, Juliane
5TreatmentTreatUnger, Juliane
6Temperature, waterTemp°CUnger, Juliane
7SalinitySalUnger, Juliane
8pHpHWannicke, NicolaPotentiometrictotal scale
9pH, standard deviationpH std dev±Wannicke, NicolaPotentiometrictotal scale
10Carbon, inorganic, dissolvedDICµmol/kgWannicke, NicolaColorimetric
11Carbon, inorganic, dissolved, standard deviationDIC std dev±Wannicke, NicolaColorimetric
12Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)pCO2water_SST_wetµatmWannicke, NicolaCalculated using CO2SYS
13Partial pressure of carbon dioxide, standard deviationpCO2 std dev±Wannicke, NicolaCalculated using CO2SYS
14Alkalinity, totalATµmol/kgWannicke, NicolaCalculated using CO2SYS
15Alkalinity, total, standard deviationAT std dev±Wannicke, NicolaCalculated using CO2SYS
16Chlorophyll aChl aµg/lWannicke, NicolaFluorometric10 l bottles
17Chlorophyll a, standard deviationChl a std dev±Wannicke, NicolaFluorometric10 l bottles
18Chlorophyll aChl aµg/lNausch, MonikaFluorometric0.5 l [33P] bottles
19Chlorophyll a, standard deviationChl a std dev±Nausch, MonikaFluorometric0.5 l [33P] bottles
20Phosphorus, organic, particulatePOPµmol/lUnger, JulianeCalculatedNodularia
21Particulate organic phosphorus, standard deviationPOP std dev±Unger, JulianeCalculatedNodularia
22Dissolved inorganic phosphorusDIPµmol/lUnger, Julianedata pooled
23Dissolved inorganic phosphorus, standard deviationDIP std dev±Unger, Julianedata pooled
24Phosphorus, organic, dissolvedDOPµmol/lUnger, JulianeCalculated
25Phosphate, organic, dissolved, standard deviationDOP std dev±Unger, JulianeCalculated
26Phosphorus, adenosine triphosphate, dissolveddATP-Pnmol/lUnger, JulianeSirius Luminometer
27Phosphorus, adenosine triphosphate, dissolved, standard deviationdATP-P std dev±Unger, JulianeSirius Luminometer
28Phosphorus, phospholipid, dissolveddPL-Pnmol/lUnger, JulianeSpectrophotometric
29Phosphorus, phospholipid, dissolved, standard deviationdPL-P std dev±Unger, JulianeSpectrophotometric
30Phosphorus, deoxyribonucleic acid, dissolveddDNA-Pnmol/lUnger, JulianeSpectrophotometric
31Phosphorus, deoxyribonucleic acid, dissolved, standard deviationdDNA-P std dev±Unger, JulianeSpectrophotometric
32Phosphorus, ribonucleic acid, dissolveddRNA-Pnmol/lUnger, JulianeSpectrophotometric
33Phosphorus, ribonucleic acid, dissolved, standard deviationdRNA-P std dev±Unger, JulianeSpectrophotometric
34Phosphorus, organic, dissolvedDOPµmol/lUnger, JulianeCalculated
35Phosphate, organic, dissolved, standard deviationDOP std dev±Unger, JulianeCalculated
36Proportion, phosphate with 33 Phosphorus[33P]PO4%Nausch, MonikaLiquid scintillationin Nodularia
37Proportion, phosphate with 33 Phosphorus, standard deviation[33P]PO4 std dev±Nausch, MonikaLiquid scintillationin Nodularia
38Proportion, phosphate with 33 Phosphorus[33P]PO4%Nausch, MonikaLiquid scintillationin DIP
39Proportion, phosphate with 33 Phosphorus, standard deviation[33P]PO4 std dev±Nausch, MonikaLiquid scintillationin DIP
40Proportion, phosphate with 33 Phosphorus[33P]PO4%Nausch, MonikaLiquid scintillationin DOP
41Proportion, phosphate with 33 Phosphorus, standard deviation[33P]PO4 std dev±Nausch, MonikaLiquid scintillationin DOP
42Carbonate system computation flagCSC flagYang, YanCalculated using seacarb after Nisumaa et al. (2010)
43Carbon dioxideCO2µmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
44Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)pCO2water_SST_wetµatmYang, YanCalculated using seacarb after Nisumaa et al. (2010)
45Fugacity of carbon dioxide (water) at sea surface temperature (wet air)fCO2water_SST_wetµatmYang, YanCalculated using seacarb after Nisumaa et al. (2010)
46Bicarbonate ion[HCO3]-µmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
47Carbonate ion[CO3]2-µmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
48Alkalinity, totalATµmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
49Aragonite saturation stateOmega ArgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
50Calcite saturation stateOmega CalYang, YanCalculated using seacarb after Nisumaa et al. (2010)
Size:
924 data points

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