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Tischer, Jana; Zopfi, Jakob; Lepori, Fabio; Su, Guangyi; Giglio, Elena; Frey, Claudia; Lehmann, Moritz F: Characteristics of the water column of the North Basin of Lake Lugano, Switzerland, at different time points - depth of oxygen depletion, fluxes to the redox transition zone, primary production, nitrate isotope effects [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.977624 (dataset in review)

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Abstract:
We investigated the water column of the meromictic Lake Lugano North Basin, Switzerland, during 12 sampling campaigns between 2015 and 2018. The dataset contains parameters specific to the water column during each sampling campaign: compound fluxes to the redox transition zone and calculated consumption rates as well as N and O isotope effects of nitrate, and depth of oxygen depletion. In addition, we show the gross primary production of carbon during the month of sampling.
Keyword(s):
15N-tracer; anammox; anoxic hypolimnion; Denitrification; dissimilatory nitrate reduction to ammonium; lake; meromixis; nitrate; Nitrate isotopes; nitrate reduction; nitrification; Nitrogen; nitrogen cycle; nitrogen isotopes; oxycline; Sulfur; sulfur cycle; water column
Supplement to:
Tischer, Jana; Lehmann, Moritz F; Su, Guangyi; Lepori, Fabio; Zopfi, Jakob (preprint): Microbial nitrogen removal versus recycling in the redox transition zone of a meromictic lake and its coupling to sulfur. https://doi.org/10.1101/2025.01.03.627289
Tischer, Jana; Zopfi, Jakob; Frey, Claudia; Venetz, Jessica; Giglio, Elena; Burgdorfer, Lukas; Rehmann, Oliver; Wankel, Scott D; Lehmann, Moritz F (preprint): Nitrogen and oxygen isotope effects during enzymatic nitrate reduction in vitro and by natural lake water consortia. https://doi.org/10.1101/2025.03.29.645582
Funding:
Swiss National Science Foundation (SNF), grant/award no. 153055: Seasonal Dynamics of fixed N elimination and its coupling with Sulfur and Carbon Cycling in the Redox Transition Zones of Lake Lugano
Coverage:
Latitude: 46.010472 * Longitude: 9.020806
Date/Time Start: 2015-02-17T10:30:00 * Date/Time End: 2018-04-25T15:00:00
Event(s):
LakeLugano * Latitude: 46.010472 * Longitude: 9.020806 * Date/Time Start: 2015-02-17T10:30:00 * Date/Time End: 2018-04-25T15:00:00 * Location: Switzerland * Method/Device: Multiple investigations (MULT) * Comment: 12 sampling campaigns between 2015 and 2018
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1DATE/TIMEDate/TimeTischer, JanaGeocode – Start timepoint of sampling
2DATE/TIMEDate/TimeTischer, JanaGeocode – End timepoint of sampling
3Nitrate, flux[NO3]- fluxµmol/m2/dayTischer, JanaCalculated after Wenk et al., 2013
4Ammonium, flux[NH4]+ fluxµmol/m2/dayTischer, JanaCalculated after Wenk et al., 2013
5Hydrogen sulfide, fluxH2S fluxµmol/m2/dayTischer, JanaCalculated after Wenk et al., 2013
6Methane, fluxCH4 fluxµmol/m2/dayTischer, JanaCalculated after Wenk et al., 2013
7Nitrate consumption rate[NO3]- con rateµmol/l/dayTischer, JanaCalculated after Wenk et al., 2013Required net in situ consumption rate that would explain the flux to the redox transition zone, assuming a 15 m consumption layer in the Lake Lugano North Basin
8Ammonium consumption rate[NH4]+ con rateµmol/l/dayTischer, JanaCalculated after Wenk et al., 2013Required net in situ consumption rate that would explain the flux to the redox transition zone, assuming a 15 m consumption layer in the Lake Lugano North Basin
9Hydrogen sulfide consumption rateH2S con rateµmol/l/dayTischer, JanaCalculated after Wenk et al., 2013Required net in situ consumption rate that would explain the flux to the redox transition zone, assuming a 15 m consumption layer in the Lake Lugano North Basin
10Methane consumption rateCH4 con rateµmol/l/dayTischer, JanaCalculated after Wenk et al., 2013Required net in situ consumption rate that would explain the flux to the redox transition zone, assuming a 15 m consumption layer in the Lake Lugano North Basin
11Nitrogen isotope effect15ε‰ AIRTischer, JanaGC-IRMS, denitrifier method (Sigman et al. 2001)Positive values indicate normal isotope effects, where the substrate becomes enriched in 15N as compared to the substrate.
12Nitrogen isotope effect, standard error15ε std e±Tischer, JanaGC-IRMS, denitrifier method (Sigman et al. 2001)
13Oxygen isotope effect18ε‰ VSMOWTischer, JanaGC-IRMS, denitrifier method (Sigman et al. 2001)Positive values indicate normal isotope effects, where the substrate becomes enriched in 15N as compared to the substrate.
14Oxygen isotope effect, standard error18ε std e±Tischer, JanaGC-IRMS, denitrifier method (Sigman et al. 2001)
15Δδ18O/Δδ15N ratioΔδ18O/Δδ15NTischer, JanaGC-IRMS, denitrifier method (Sigman et al. 2001)
16Δδ18O/Δδ15N ratio, standard errorΔδ18O/Δδ15N std e±Tischer, JanaGC-IRMS, denitrifier method (Sigman et al. 2001)
17SeasonSeasonTischer, JanaSummer or Winter, determined based on water column stability
18Depth of oxygen depletionDepth O2 depletmTischer, JanaCTD, Idronaut, Ocean Seven 316PlusThese data were collected within the limnological campaign on Lake Lugano funded by the International Commission for the Protection of Italian-Swiss Waters (CIPAIS)
19Gross primary production of carbonGPP Cg/m2Tischer, JanaLight and dark bottle method (Schindler et al. 1972)Per month; These data were collected within the limnological campaign on Lake Lugano funded by the International Commission for the Protection of Italian-Swiss Waters (CIPAIS)
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
180 data points

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