Sediment Properties Drive Spatial Variability of Potential Methane Production and Oxidation in Small Streams Article Swipe

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Pascal Bodmer , Jeremy Wilkinson , Andreas Lorke ·

YOU? · · 2020 · Open Access · · DOI: https://doi.org/10.1029/2019jg005213

Emissions of the potent greenhouse gas methane (CH 4 ) from streams and rivers are a significant component of global freshwater methane emissions. The distribution of CH 4 production and oxidation within stream sections and in vertical sediment profiles is not well understood, and the environmental controls on CH 4 production and emission in such systems create a significant challenge for assessing larger‐scale dynamics. Here we investigate factors driving the spatial variability of sediment potential methane production (PMP) and potential methane oxidation (PMO) in a temperate stream network in Germany. PMP was highly variable, ranging from 5 × 10 −4 to 28.58 μg CH 4 gDW −1 d −1 and PMO ranged from 0.43 μg CH 4 gDW −1 d −1 to 14.41 μg CH 4 gDW −1 d −1 . Important drivers of spatial variability of PMP and PMO in the sediments of the stream main‐stem were related to fine sediment fraction and organic carbon content. At smaller spatial scale, that is, in a sub‐catchment stream section, the drivers were more complex and included sediment nitrogen and organic carbon content, as well as porewater dissolved organic carbon, dissolved organic matter quality, and metal concentrations. As with reservoirs and impounded rivers, fine sediment deposition and organic carbon content were found to be key controls on the spatial variability of CH 4 production and oxidation. These findings enhance our understanding of CH 4 dynamics, improve the potential for identifying CH 4 production hotspots in small streams, and provide a potential means for upscaling emission rates in larger‐scale assessments.

Related Topics

Sediment

Environmental Science

Total Organic Carbon

Greenhouse Gas

Carbon Fibers

Environmental Chemistry

Geotechnical Engineering

Composite Material

Concepts

Methane Sediment STREAMS Environmental science Total organic carbon Dissolved organic carbon Greenhouse gas Spatial variability Organic matter Hydrology (agriculture) Carbon fibers Environmental chemistry Deposition (geology) Nitrogen Chemistry Geology Oceanography Geomorphology Materials science Computer science Mathematics Composite number Statistics Organic chemistry Computer network Geotechnical engineering Composite material

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Type: article
Language: en
Landing Page: https://doi.org/10.1029/2019jg005213
PDF: https://onlinelibrary.wiley.com/doi/pdfdirect/10.1029/2019JG005213
OA Status: hybrid
Cited By: 67
References: 79
Related Works: 10
OpenAlex ID: https://openalex.org/W2998597046

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DOI: https://doi.org/10.1029/2019jg005213

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Title: Sediment Properties Drive Spatial Variability of Potential Methane Production and Oxidation in Small Streams

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Type: article

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Language: en

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Publication year: 2020

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Publication date: 2020-01-01

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Authors: Pascal Bodmer, Jeremy Wilkinson, Andreas Lorke

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Landing page: https://doi.org/10.1029/2019jg005213

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PDF URL: https://onlinelibrary.wiley.com/doi/pdfdirect/10.1029/2019JG005213

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Concepts: Methane, Sediment, STREAMS, Environmental science, Total organic carbon, Dissolved organic carbon, Greenhouse gas, Spatial variability, Organic matter, Hydrology (agriculture), Carbon fibers, Environmental chemistry, Deposition (geology), Nitrogen, Chemistry, Geology, Oceanography, Geomorphology, Materials science, Computer science, Mathematics, Composite number, Statistics, Organic chemistry, Computer network, Geotechnical engineering, Composite material

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Cited by: 67

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Citations by year (recent): 2025: 14, 2024: 17, 2023: 11, 2022: 13, 2021: 6

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