Coastal Nitrogen Cycling – Biogeochemical Processes and the Impacts of Human Activities and Climate Change.

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Voss, Maren, Choisnard, Noémie, Bartoli, Marco, Bonaglia, Stefano, Bourbonnais, Annie, Frey, Claudia, Holtermann, Peter, Jennerjahn, Tim ORCID: https://orcid.org/0000-0003-1022-5126, Jickells, Tim and Weston, Keith (2023) Coastal Nitrogen Cycling – Biogeochemical Processes and the Impacts of Human Activities and Climate Change. Reference Module in Earth Systems and Environmental Sciences . DOI https://doi.org/10.1016/B978-0-323-90798-9.00042-1.

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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.

Document Type: Article
Programme Area: PA3
Research affiliation: Biogeochemistry and Geology > Ecological Biogeochemistry
Refereed: Yes
Open Access Journal?: No
DOI: https://doi.org/10.1016/B978-0-323-90798-9.00042-1
Date Deposited: 11 Oct 2023 14:30
Last Modified: 27 Oct 2023 12:14
URI: http://cris.leibniz-zmt.de/id/eprint/5258

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