Enhanced benthic nitrous oxide and ammonium production after natural oxygenation of long‐term anoxic sediments

SND-ID: 2022-12

Creator/Principal investigator(s)

Astrid Hylén - University of Gothenburg, Department of Marine Sciences orcid

Stefano Bonaglia - University of Gothenburg, Department of Marine Sciences orcid

Elizabeth Robertson - University of Gothenburg, Department of Marine Sciences orcid

Ugo Marzocchi - Aarhus University, Department of Biology orcid

Mikhail Kononets - University of Gothenburg, Department of Marine Sciences orcid

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Description

In this study, we describe the long-term impact of a natural oxygenation event on the fate of fixed nitrogen in the sediment. We investigated whether the newly oxygenated sediments were sites of efficient removal of fixed nitrogen through denitrification and anammox, which environmental factors affected the division between nitrate reduction processes, and whether nitrate from the water column or sedimentary nitrification was fuelling nitrate reduction processes in the sediment. We conducted three yearly samplings in 2016, 2017, and 2018, where we performed in situ measurements of nitrate reduction process rates and sediment–water fluxes of nutrients, oxygen and dissolved inorganic carbon . We additionally collected sediment samples and measured sediment microprofiles of oxygen, nitrous oxide and hydrogen sulphide to gain further insights into the spatial distribution of the processes in surface sediments.

Language

English

Research principal, contributors, and funding

Research principal

University of Gothenburg

Funding 1

  • Funding agency: Swedish Research Council rorId
  • Funding agency's reference number: 2015-03717
  • Project name on the application: Effect of a natural Baltic oxygenation-deoxygenation cycle on benthic recycling of P, N, Si and C - An in situ observation and modelling study

Funding 2

  • Funding agency: Grundfos Foundation rorId
Protection and ethical review

Data contains personal data

No

Method and time period

Time period(s) investigated

2016-04-10 – 2018-04-30

Geographic coverage

Geographic spread

Geographic location: Baltic Sea

Geographic description: Eastern Gotland Basin, Baltic Sea

Publications

Hylén, A., S. Bonaglia, E. Robertson, U. Marzocchi, M. Y. Kononets, and P. O. J. Hall. 2022. Enhanced benthic nitrous oxide and ammonium production after natural oxygenation of long‐term anoxic sediments. Limnol. Oceanogr. 1–15. doi:10.1002/lno.12001
DOI: https://doi.org/10.1002/lno.12001

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Dataset
Processes and pools in the benthic nitrogen cycle after natural oxygenation of long-term anoxic sediment

Description

The data set contains 5 files with the following data:

- Station information; locations, sediment surface and bottom water conditions
- Sediment properties; carbon and nitrogen in the sediment solid phase, porosity, pore water concentrations of NOx and NH4.
- Microsensor measurements of O2, N2O and H2S
- Sediment-water fluxes of oxygen, dissolved inorganic carbon, NH4 and NOx
- Nitrate reduction rates in the sediment

Full descriptions of the data can be found in the corresponding readme files

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Version 1

Citation

Astrid Hylén, Stefano Bonaglia, Elizabeth Robertson, Ugo Marzocchi, Mikhail Kononets, Per Hall. University of Gothenburg, Department of Marine Sciences (2022). Processes and pools in the benthic nitrogen cycle after natural oxygenation of long-term anoxic sediment. Swedish National Data Service. Version 1. https://doi.org/10.5878/7hr7-s215

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Data format / data structure

Numeric

Text

Creator/Principal investigator(s)

Astrid Hylén - University of Gothenburg, Department of Marine Sciences orcid

Stefano Bonaglia - University of Gothenburg, Department of Marine Sciences orcid

Elizabeth Robertson - University of Gothenburg, Department of Marine Sciences orcid

Ugo Marzocchi - Aarhus University, Department of Biology orcid

Mikhail Kononets - University of Gothenburg, Department of Marine Sciences orcid

... Show more..

License

Creative Commons  Attribution 4.0 International (CC BY 4.0)
Published: 2022-04-05