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Pausch, Franziska; Bischof, Kai; Trimborn, Scarlett (2019): The Southern Ocean diatom Chaetoceros debilis is limited in growth by iron and manganese together [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.905473, Supplement to: Pausch, Franziska; Bischof, Kai; Trimborn, Scarlett; Jesus, Bruno (2019): Iron and manganese co-limit growth of the Southern Ocean diatom Chaetoceros debilis. PLoS ONE, 14(9), e0221959, https://doi.org/10.1371/journal.pone.0221959

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Abstract:
In some parts of the Southern Ocean (SO), even though low surface concentrations of iron (Fe) and manganese (Mn) indicate FeMn co-limitation, we still lack an understanding on how Mn and Fe availability influences SO phytoplankton ecophysiology. Therefore, this study investigated the effects of Fe and Mn limitation alone as well as their combination on growth, photophysiology and particulate organic carbon production of the bloom-forming Antarctic diatom Chaetoceros debilis. Our results clearly show that growth, photochemical efficiency and carbon production of C. debilis were co-limited by Fe and Mn as highest values were only reached when both nutrients were provided. Even though Mn-deficient cells had higher photochemical efficiencies than Fe-limited ones, they, however, displayed similar low growth and POC production rates, indicating that Mn limitation alone drastically impeded the cell's performance. These results demonstrate that similar to low Fe concentrations, low Mn availability inhibits growth and carbon production of C. debilis. As a result from different species-specific trace metal requirements, SO phytoplankton species distribution and productivity may therefore not solely depend on the input of Fe alone, but also critically on Mn acting together as important drivers of SO phytoplankton ecology and biogeochemistry.
Keyword(s):
co-limitation; Diatom; Fe; growth; Mn; Photosynthesis; trace metals
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1 TypeTypePausch, Franziska
2 SpeciesSpeciesPausch, Franziska
3 TreatmentTreatPausch, FranziskaIron/manganese treatment
4 Maximum photochemical quantum yield of photosystem IIFv/FmPausch, Franziska
5 Maximum photochemical quantum yield of photosystem II, standard deviationFv/Fm std dev±Pausch, Franziska
6 Functional absorption cross sections of photosystem II reaction centersSigma PSIInm2Pausch, Franziska
7 Functional absorption cross sections of photosystem II reaction centers, standard deviationSigma PSII std dev±Pausch, Franziska
8 Phytoplankton growth ratePhytopl µ1/dayPausch, Franziska
9 Growth rate, standard deviationµ std dev±Pausch, Franziska
10 Particulate organic carbon production per cellPOC prod/cellpg/#/dayPausch, Franziska
11 Particulate organic carbon, production, standard deviationPOC prod std dev±Pausch, Franziskapg C/cell/day
12 Carbon, organic, particulate, per cellPOC/cellpg/#Pausch, Franziska
13 Particulate organic carbon content per cell, standard deviationPOC cont/cell std dev±Pausch, Franziskapg C/cell
14 Carbon/Nitrogen ratioC/Nmol/molPausch, Franziska
15 Carbon/Nitrogen ratio, standard deviationC/N std dev±Pausch, Franziskamol/mol
16 IrradianceEµmol/m2/sPausch, Franziska
17 Electron transport rate, absoluteaETRe/PSII/sPausch, Franziska
18 Electron transport rate, absolute, standard deviationaETR std dev±Pausch, Franziska
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Size:
234 data points

Data

Download dataset as tab-delimited text — use the following character encoding:

1 
Type		2 
Species		3 
Treat		4 
Fv/Fm		5 
Fv/Fm std dev [±]		6 
Sigma PSII [nm2]		7 
Sigma PSII std dev [±]		8 
Phytopl µ [1/day]		9 
µ std dev [±]		10 
POC prod/cell [pg/#/day]		11 
POC prod std dev [±]		12 
POC/cell [pg/#]		13 
POC cont/cell std dev [±]		14 
C/N [mol/mol]		15 
C/N std dev [±]		16 
E [µmol/m2/s]		17 
aETR [e/PSII/s]		18 
aETR std dev [±]
LaboratoryChaetoceros debilis (phytoplankton)-FeMn0.310.013.370.150.260.016.510.4025.112.217.240.15
LaboratoryChaetoceros debilis (phytoplankton)-Fe0.340.013.290.270.310.037.721.0524.912.217.370.08
LaboratoryChaetoceros debilis (phytoplankton)-Mn0.420.012.560.160.260.018.140.3531.401.937.160.23
LaboratoryChaetoceros debilis (phytoplankton)Control0.470.022.530.100.400.0210.660.7727.381.816.970.18
LaboratoryChaetoceros debilis (phytoplankton)-FeMn951455
LaboratoryChaetoceros debilis (phytoplankton)-FeMn15523012
LaboratoryChaetoceros debilis (phytoplankton)-FeMn24233821
LaboratoryChaetoceros debilis (phytoplankton)-FeMn39051039
LaboratoryChaetoceros debilis (phytoplankton)-FeMn61969477
LaboratoryChaetoceros debilis (phytoplankton)-FeMn868823135
LaboratoryChaetoceros debilis (phytoplankton)-FeMn1229862153
LaboratoryChaetoceros debilis (phytoplankton)-FeMn1549839170
LaboratoryChaetoceros debilis (phytoplankton)-Fe9514812
LaboratoryChaetoceros debilis (phytoplankton)-Fe15522718
LaboratoryChaetoceros debilis (phytoplankton)-Fe24233827
LaboratoryChaetoceros debilis (phytoplankton)-Fe39051344
LaboratoryChaetoceros debilis (phytoplankton)-Fe61973257
LaboratoryChaetoceros debilis (phytoplankton)-Fe86887272
LaboratoryChaetoceros debilis (phytoplankton)-Fe122994687
LaboratoryChaetoceros debilis (phytoplankton)-Fe173190679
LaboratoryChaetoceros debilis (phytoplankton)-Mn951037
LaboratoryChaetoceros debilis (phytoplankton)-Mn15516413
LaboratoryChaetoceros debilis (phytoplankton)-Mn24223720
LaboratoryChaetoceros debilis (phytoplankton)-Mn39035133
LaboratoryChaetoceros debilis (phytoplankton)-Mn61947151
LaboratoryChaetoceros debilis (phytoplankton)-Mn86853167
LaboratoryChaetoceros debilis (phytoplankton)-Mn122952976
LaboratoryChaetoceros debilis (phytoplankton)Control951073
LaboratoryChaetoceros debilis (phytoplankton)Control1551633
LaboratoryChaetoceros debilis (phytoplankton)Control2422384
LaboratoryChaetoceros debilis (phytoplankton)Control3903505
LaboratoryChaetoceros debilis (phytoplankton)Control5954477
LaboratoryChaetoceros debilis (phytoplankton)Control78048229