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Coastal Nitrogen Cycling – Biogeochemical Processes and the Impacts of Human Activities and Climate Change. In: Treatise on Estuarine and Coastal Science (Second edition)

  • Maren Voss
  • Noémie Choisnard
  • Marco Bartoli
  • Stefano Bonaglia
  • Annie Bourbonnais
  • Claudia Frey
  • Peter Holtermann
  • Tim Jennerjahn
  • Tim Jickells
  • Keith Weston

Abstract

In coastal zones, intense organic matter cycling occurs due to land proximity, water – sediment interaction, and exchange processes with the open ocean. Nitrogen sources include atmospheric deposition, submarine groundwater discharge, wetlands, rivers/estuaries and the open ocean. All sources are highly impacted by human activities, such as food production. The nitrogen cycle consists of mostly microbial processes, including nitrogen fixation, nitrification, denitrification, anaerobic ammonium oxidation (anammox), and dissimilatory nitrate reduction to ammonium (DNRA), which interact in different ways depending on environmental factors, in particular, the availability of oxygen. At present, human-induced production of reactive nitrogen globally equals the natural one, and a large part of it is introduced into the coastal ocean, where it strongly affects ecology, for example, through eutrophication. In the future, unless anthropogenic nitrogen inputs are reduced, a deterioration of the ecological situation can be expected when rising temperatures and declining oxygen exacerbate the effects of the anthropogenic nitrogen inputs.

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Voss M., Choisnard N., Bartoli M., Bonaglia S., Bourbonnais A., Frey C., Holtermann P., Jennerjahn T., Jickells T. and Weston K. (2024) Coastal Nitrogen Cycling – Biogeochemical Processes and the Impacts of Human Activities and Climate Change. In:. Treatise on Estuarine and Coastal Science (Second edition) (pp. 225-250). 10.1016/B978-0-323-90798-9.00042-1

Details

Forschungsschwerpunkte
Datum 22.04.2024
Volume 3
Seiten 225-250
Buchtitel Treatise on Estuarine and Coastal Science (Second edition)
ISBN 978-0-323-91042-2
Open Access Closed Access
Open Access Status Closed Access
Eprints_link https://cris.leibniz-zmt.de/id/eprint/5258

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