Sediment fluxes rather than oxic methanogenesis explain diffusive CH4 emissions from lakes and reservoirs

Peeters, Frank; Fernández, Jorge Encinas; Hofmann, Hilmar

doi:10.1038/s41598-018-36530-w

Cited by 77 publications

(103 citation statements)

References 43 publications

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“…As a second evaluative approach, as shown in Table 1, the code overlapping function which combines content and stakeholder categories allowing for an analysis of discourse topics and participants thereby identifying key stakeholders and interests. Agriculture (40) Cooperation (165) Tourism (33) Zweckverbände (Administration Units) (31) Dialogue (76) Water management offices (19) Zweckverbände (Administration Units) (11) Challenges (197) Tourism (80) Agriculture (31) Nature protection (29) Administration (25) Conflicts (114) Tourism (41) Nature protection (24) Agriculture (22) Cyanobacteria (48),…”

Section: Resultsmentioning

confidence: 99%

“…Health offices (13), (7) Water management offices (10), (22) Agriculture (10), (55) Zweckverbände (Administration Units) (11) Occurrence (15), (16) Health offices (6) Water management offices (3) Causes (14), (32) Agriculture (8), (23) Water management offices (4), (3) Solutions (13), (32) Agriculture (13) Water management offices (5), (7) Zweckverbände (Administration Units) (5) Health consequences (6) Health offices (5) General consequences (21) Water management offices (5) Zweckverbände (Administration Units) (4)…”

Section: Resultsmentioning

confidence: 99%

“…Agriculture (40) Cooperation (165) Tourism (33) Zweckverbände (Administration Units) (31) Dialogue (76) Water management offices (19) Zweckverbände (Administration Units) (11) Challenges (197) Tourism (80) Agriculture (31) Nature protection (29) Administration (25) Conflicts (114) Tourism (41) Nature protection (24) Agriculture (22) Cyanobacteria (48),…”

Section: Resultsmentioning

confidence: 99%

“…The construction of dams and reservoirs does not only radically change the area directly affected, but the entire runoff system as well as the catchment area [10]. There is change in the flow regime, sediment deposition in the reservoirs, accumulation of nutrients in the (stored) water body, cyanobacteria blooms and methane and carbon dioxide emissions from the water column to name but a few [10,11]. The physical impacts of dams are not the only effects caused by this type of infrastructure-they also have a major impact on the social surrounding and the social networks in situ.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Transferring Water While Transforming Landscape: New Societal Implications, Perceptions and Challenges of Management in the Reservoir System Franconian Lake District

Daus

Koberger

Gnutzmann

et al. 2019

Water

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This study investigates the different stakeholder based discourses and challenges around the Franconian Lake District (FLD), a recently constructed large reservoir system in Germany. The construction and operation of reservoirs represent a massive alteration of their natural and social environments leading to discourses and potential conflicts between a wide scope of heterogeneous interest patterns. Studies have shown that large reservoirs can be an important contributor to water supply, irrigation, energy storage and therefore climate change mitigation on a global scale, which brings these conflicting interests to a broader societal concern. Yet, information about conflicts around existing (German) reservoirs is limited. To assess which issues and conflicts appear on the daily agenda and how they are perceived, communicated and addressed by the stakeholders, a total of 609 articles in the Nürnberger Nachrichten and 22 semi-structured expert interviews were analysed, using qualitative content analysis. The results show that discourses at FLD are predominantly determined by economic factors. Management issues are dominated by discussions about cyanobacteria, which can pose a health risk, thereby impeding recreational use of the lakes and consequently causing economic losses and an image problem for the region. The issue is also strongly interlinked with other aspects of concern and therefore one of the main challenges at the FLD. Due to the construction of the lakes and the evolving strong tourism sector, the formerly agricultural region was subject to a major structural change linking together a very heterogeneous set of interests. The results of this study can help in establishing a management framework to suit all stakeholders and possibly be transferrable to similar projects.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Transferring Water While Transforming Landscape: New Societal Implications, Perceptions and Challenges of Management in the Reservoir System Franconian Lake District

Daus

Koberger

Gnutzmann

et al. 2019

Water

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“…For example, increasing near-surface turbulence and increasing winds can increase the magnitude of CH 4 diffusing across the air-water interface (Bastviken et al, 2004;Poindexter et al, 2016;Poindexter & Variano, 2013;Yang et al, 2013). In addition, elevated epilimnetic autochthonous production can increase CH 4 diffusion by providing labile organic matter to the sediments, which can stimulate pore water methanogenesis (Peeters et al, 2019), as well as providing labile material for oxic CH 4 production and generating anoxic microniches that produce CH 4 in the water column (Bižić et al, 2020;Bogard et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

The Magnitude and Drivers of Methane Ebullition and Diffusion Vary on a Longitudinal Gradient in a Small Freshwater Reservoir

et al. 2020

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Key Points CH4 ebullition rates decreased by 98% and CH4 diffusion decreased by 32% on a longitudinal gradient from reservoir inflow to dam Ebullition was driven by physical variables upstream and phytoplankton downstream; diffusion was most related to phytoplankton Despite large variation in CH4 emissions longitudinally, time series models well captured the dynamics of emissions from a small reservoir

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Methane Paradox

Bižić

Grossart

Ionescu

2020

Encyclopedia of Life Sciences

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In contrast to common textbook knowledge, substantial amounts of the potent greenhouse gas methane are produced and emitted from oxygenated freshwater and marine systems. Since this phenomenon contradicts the belief that biological methane production occurs only under strictly anoxic conditions, it was termed the ‘Methane Paradox’. Several biotic and abiotic mechanisms have been suggested to explain the ‘Methane Paradox’. These include the transport of methane from anoxic environments, the formation of microenvironments able to support the classical anaerobic methanogenesis and novel pathways. Among the latter demethylation of methylphosphonates has been proposed as an important pathway in both marine and freshwater systems. Nevertheless, recent studies point to the ability of a broad spectrum of organisms to produce methane independent of the currently known biochemical pathways. Key Concepts Methane has roughly 30 times the global warming potential of carbon dioxide by mass over a century. Methane is emitted from oxygen‐rich environments and not only from anoxic ones as is often stated. The ‘Methane Paradox’ describes the occurrence of elevated methane concentrations in the upper oxic water column as compared to deeper waters, suggesting local production despite the strict anaerobic nature of all known Archaea ‐based methanogenic pathways. Abiotic factors can contribute to the presence of methane in oxic waters and include transport of methane produced in anoxic environments and nonbiological degradation of methylated compounds. Biotic factors contributing to the presence of methane in oxic waters include local production by microorganisms in anoxic microniches, degradation of methylated compounds and direct, photosynthesis‐related production by phytoplankton like Cyanobacteria , diatoms, green algae and Coccolithofores .

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Sediment fluxes rather than oxic methanogenesis explain diffusive CH4 emissions from lakes and reservoirs

Cited by 77 publications

References 43 publications

Transferring Water While Transforming Landscape: New Societal Implications, Perceptions and Challenges of Management in the Reservoir System Franconian Lake District

Transferring Water While Transforming Landscape: New Societal Implications, Perceptions and Challenges of Management in the Reservoir System Franconian Lake District

The Magnitude and Drivers of Methane Ebullition and Diffusion Vary on a Longitudinal Gradient in a Small Freshwater Reservoir

Methane Paradox

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