Schlangen, Isabell; Löscher, Carolin Regina; Attard, Karl Michael; Sørensen, Lisbeth Fürst; Riemann, Lasse (2025): The effect of sediment resuspension on pelagic nitrogen fixation in a Danish fjord - Core incubations [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.983171
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Published: 2025-11-18 • DOI registered: 2025-12-17
Abstract:
This dataset contains results from incubation experiments investigating the impact of sediment resuspension on nitrogen (N₂) fixation in a microtidal fjord environment. Experiments were conducted seasonally during June, July, August, and September 2023 using water and sediment from Kærby Fed in Odense Fjord, Denmark. The aim was to evaluate whether varying intensities of resuspension affect pelagic N₂ fixation activity. Measured parameters include: (i) N₂ fixation rates, determined using the 15N₂ tracer method following Mohr et al. (2010), (ii) particulate organic carbon (POC) and particulate organic nitrogen (PON) content of the added sediment, analyzed by Elemental Analysis–Isotope Ratio Mass Spectrometry, (iii) concentrations of dissolved inorganic nitrogen (DIN) and phosphorus (DIP) in the overlying water, measured using a spectrophotometer. Incubations involved sediment slurries subjected to different resuspension intensities, simulating a range of bed-shear stress conditions. All treatments were conducted in triplicates, and the dataset includes standard deviations for replicate measurements. The data support assessments of how sediment-driven processes influence microbial nitrogen cycling in coastal zones of the Danish Baltic Sea.
Keyword(s):
Supplement to:
Schlangen, Isabell; Riemann, Lasse; Attard, Karl Michael; Löscher, Carolin Regina (2025): The effect of sediment resuspension on pelagic nitrogen fixation in a Danish Fjord. Estuarine, Coastal and Shelf Science, 327, 109566, https://doi.org/10.1016/j.ecss.2025.109566
Related to:
Schlangen, Isabell; Löscher, Carolin Regina; Attard, Karl Michael; Sørensen, Lisbeth Fürst; Riemann, Lasse (2025): The effect of sediment resuspension on pelagic nitrogen fixation in a Danish fjord - Sediment characteristics [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.983163
References:
Großkopf, Tobias; Mohr, Wiebke; Baustian, Tina; Schunck, Harald; Gill, Diana; Kuypers, Marcel MM; Lavik, Gaute; Schmitz, Ruth A; Wallace, Douglas WR; LaRoche, Julie (2012): Doubling of marine dinitrogen-fixation rates based on direct measurements. Nature, 488, 361-364, https://doi.org/10.1038/nature11338
Mohr, Wiebke; Großkopf, Tobias; Wallace, Douglas WR; LaRoche, Julie (2010): Methodological Underestimation of Oceanic Nitrogen Fixation Rates. PLoS ONE, 5(9), e12583, https://doi.org/10.1371/journal.pone.0012583
Montoya, Joseph P; Voss, Maren; Kähler, Paul; Capone, D G (1996): A Simple, High-Precision, High-Sensitivity Tracer Assay for N2 Fixation. Applied and Environmental Microbiology, 62(3), 986-993, https://doi.org/10.1128/aem.62.3.986-993.1996
Funding:
Independent Research Fund Denmark (DFF), grant/award no. DFF-0217-00089B: Biogeochemical cycling and nitrogen fixation in Danish coastal regions
Coverage:
Latitude: 55.452444 * Longitude: 10.492889
Date/Time Start: 2023-06-19T00:00:00 * Date/Time End: 2023-09-05T00:00:00
Event(s):
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Type of study | Study type | Schlangen, Isabell | |||
| 2 | Location of event | Location | Schlangen, Isabell | |||
| 3 | Latitude of event | Latitude | Schlangen, Isabell | |||
| 4 | Longitude of event | Longitude | Schlangen, Isabell | |||
| 5 | Sampling date/time, experiment | Date/time sampling exp | Schlangen, Isabell | |||
| 6 | Month | Month | Schlangen, Isabell | |||
| 7 | Experimental treatment | Exp treat | Schlangen, Isabell | Incubation of sediment core, in situ | Addition of water or sediment (slurry) | |
| 8 | Number of measurements | n | # | Schlangen, Isabell | ||
| 9 | Treatment: sediment | T:sediment | g | Schlangen, Isabell | Addition of marine sediment | Amount of added sediment (slurry) |
| 10 | Treatment: sediment, standard deviation | T:sediment std dev | ± | Schlangen, Isabell | Calculated | Amount of added sediment (slurry) |
| 11 | Nitrogen fixation rate | N2 fix | nmol/l/day | Schlangen, Isabell | According to Montoya et al. (1996), modified after Mohr et al. (2010) and Großkopf et al. 2012) | |
| 12 | Nitrogen fixation rate, standard deviation | N2 fix std dev | ± | Schlangen, Isabell | Calculated | |
| 13 | Nitrogen, inorganic, dissolved | DIN | µmol/l | Schlangen, Isabell | Spectrophotometer UV/VIS, Thermo Fisher Scientific, Genesys 10 | |
| 14 | Nitrogen, inorganic, dissolved, standard deviation | DIN std dev | ± | Schlangen, Isabell | Calculated | |
| 15 | Phosphorus, inorganic, dissolved | DIP | µmol/l | Schlangen, Isabell | Spectrophotometer UV/VIS, Thermo Fisher Scientific, Genesys 10 | |
| 16 | Phosphorus, inorganic, dissolved, standard deviation | DIP std dev | ± | Schlangen, Isabell | Calculated | |
| 17 | Nitrogen, organic, particulate | PON | µmol/l | Schlangen, Isabell | Elemental Analysis - Isotope Ratio Mass Spectrometry (EA-IRMS), Thermo Fisher Scientific, EA IsoLink CN - ConFlo IV - Delta V Plus | |
| 18 | Nitrogen, organic, particulate, standard deviation | PON std dev | ± | Schlangen, Isabell | Calculated | |
| 19 | Carbon, organic, particulate | POC | µmol/l | Schlangen, Isabell | Elemental Analysis - Isotope Ratio Mass Spectrometry (EA-IRMS), Thermo Fisher Scientific, EA IsoLink CN - ConFlo IV - Delta V Plus | |
| 20 | Carbon, organic, particulate, standard deviation | POC std dev | ± | Schlangen, Isabell | Calculated | |
| 21 | Carbon/Nitrogen ratio | C/N | Schlangen, Isabell | Elemental analyzer, Thermo Scientific, Flash EA 1112; coupled with an isotope ratio mass spectrometer, Thermo Fisher, Finnigan Delta Plus XP | ||
| 22 | Carbon/Nitrogen ratio, standard deviation | C/N std dev | ± | Schlangen, Isabell | Calculated | |
| 23 | Nitrogen, inorganic, dissolved | DIN | µmol/l | Schlangen, Isabell | Spectrophotometer UV/VIS, Thermo Fisher Scientific, Genesys 10 | Overlying water (not incubated) |
| 24 | Nitrogen, inorganic, dissolved, standard deviation | DIN std dev | ± | Schlangen, Isabell | Calculated | Overlying water (not incubated) |
| 25 | Phosphorus, inorganic, dissolved | DIP | µmol/l | Schlangen, Isabell | Spectrophotometer UV/VIS, Thermo Fisher Scientific, Genesys 10 | Overlying water (not incubated) |
| 26 | Phosphorus, inorganic, dissolved, standard deviation | DIP std dev | ± | Schlangen, Isabell | Calculated | Overlying water (not incubated) |
| 27 | Nitrogen, inorganic, dissolved/Phosphorus, inorganic, dissolved ratio | DIN/DIP | Schlangen, Isabell | Calculated | Overlying water (not incubated) |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
248 data points