Journal article
Nitrate-driven eutrophication supports high nitrous oxide production and emission in coastal lagoons
Journal of geophysical research. Biogeosciences, Vol.130(4), pp.1-16
03/04/2025
Metrics
118 File views/ downloads
22 Record Views
UN Sustainable Development Goals (SDGs)
This output has contributed to the advancement of the following goals:
Source: InCites
Abstract
Under current circumstances, coastal lagoons are net emitters of nitrous oxide (N2O) to the atmosphere. We hypothesize that widespread nitrogen-driven coastal eutrophication will enhance N2O production and emissions from coastal lagoons. Here, we quantified spatial and temporal patterns of sediment-water and water-air N2O fluxes in three large eutrophic lagoons in Europe. Annual sediment N2O fluxes ranged between -0.3 +/- 0.3 (summer) and 10.6 +/- 2.0 mu mol m(-2) d(-1) (spring). In spring, conspicuous sediment effluxes were mainly supported by high nitrate concentrations (89-202 mu M) and incomplete denitrification. In summer, a small sediment influx was related to nitrate limitation (0-9 mu M), potentially leading to N2O demand for denitrification. The water-air N2O fluxes were comparable with benthic fluxes, indicating that sediment was the main source of N2O to the atmosphere. The hypereutrophic Curonian Lagoon had the largest N2O emission at 4.9 +/- 2.1 mu mol m(-2) d(-1), while the less eutrophic Oder and Vistula lagoons emitted 2.5 +/- 1.0 and 2.0 +/- 0.7 mu mol m(-2) d(-1), respectively. Our observations, combined with earlier measurements in coastal lagoons worldwide, revealed a lagoon median (Q1-Q3) N2O emission of 14.2 (2.7-29.8) Gg yr(-1), which is about 48% higher than previous estimates. Eutrophication driven by large nitrogen inputs is thus a significant driver of coastal N2O emissions globally.
Details
- Title
- Nitrate-driven eutrophication supports high nitrous oxide production and emission in coastal lagoons
- Creators
- Henry L. S. Cheung - University of GothenburgMindaugas Zilius - Klaipėda UniversityTobia Politi - University of GothenburgElise Lorre - Klaipėda UniversityIrma Vybernaite-Lubiene - Klaipėda UniversityIsaac R. Santos - University of GothenburgStefano Bonaglia - University of Gothenburg
- Publication Details
- Journal of geophysical research. Biogeosciences, Vol.130(4), pp.1-16
- Publisher
- Amer Geophysical Union
- Number of pages
- 16
- Grant note
- S-MIP-22-47 / Research Council of Lithuania (LMTLT) Swedish Research Council 2022-04710; 2020-00457 / Vetenskapsradet; Swedish Research Council
- Identifiers
- 991013274175802368
- Copyright
- © 2025. The Author(s). This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
- Academic Unit
- Faculty of Science and Engineering; National Marine Science Centre
- Language
- English
- Resource Type
- Journal article