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Published (Version of record)CC BY V4.0, Open Access
Published (Version of record)CC BY V4.0, Open
Letter/Communication
Eutrophication and urbanization enhance methane emissions from coastal lagoons
Limnology and oceanography letters, Vol.10(1), pp.140-150
02/2025
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Source: InCites
Abstract
Coastal lagoons are important nutrient filters and carbon sinks but may release large amounts of methane (CH4) to the atmosphere. Here, we hypothesize that eutrophication and population density will turn coastal lagoons into stronger methane emitters. We report benthic fluxes from 187 sediment cores incubated from three of the largest European lagoons suffering persistent eutrophication. Methane fluxes were mainly driven by sediment porosity, organic matter, and dissolved inorganic carbon (DIC) fluxes. Methane was always supersaturated (250–49,000%) in lagoon waters leading to large, variable emissions of 0.04–26 mg CH4 m−2 d−1. Combining our new dataset with earlier estimates revealed a global coastal lagoon emission of 7.9 (1.4–34.7) Tg CH4 yr−1 with median values of 5.4 mg CH4 m−2 d−1. Lagoons with very highly populated catchments released much more methane (223 mg CH4 m−2 d−1). Overall, projected increases in eutrophication, organic loading and population densities will enhance methane fluxes from lagoons worldwide.
Details
- Title
- Eutrophication and urbanization enhance methane emissions from coastal lagoons
- Creators
- Stefano Bonaglia - University of GothenburgHenry Lok Shan Cheung - University of GothenburgTobia Politi - University of GothenburgIrma Vybernaite-Lubiene - Klaipėda UniversityTristan McKenzie - University of GothenburgIsaac R. Santos - University of GothenburgMindaugas Zilius - Klaipėda University
- Publication Details
- Limnology and oceanography letters, Vol.10(1), pp.140-150
- Publisher
- John Wiley & Sons, Inc.
- Number of pages
- 11
- Grant note
- Vetenskapsrådet. Grant Number: 2022-04710 Lietuvos Mokslo Taryba. Grant Numbers: P-MIP-22-209, S-MIP-22-47
- Identifiers
- 991013222513102368
- Copyright
- © 2024 The Author(s). Limnology and Oceanography Letters published by Wiley Periodicals LLC on behalf of Association for the Sciences of Limnology and Oceanography. This is an open access article under the terms of the Creative Commons Attribution License.
- Academic Unit
- Faculty of Science and Engineering
- Language
- English
- Resource Type
- Letter/Communication