Global regulation of methane emission from natural lakes

Sanches, Lúcia Fernandes; Guenet, Bertrand; Marinho, Cláudio Cardoso; Barros, Nathan; Esteves, Francisco de Assis

doi:10.1038/s41598-018-36519-5

Cited by 74 publications

(55 citation statements)

References 52 publications

(65 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Although lakes and canals also fix carbon internally via photosynthesis, lake metabolism is generally a net source of CO 2 and CH 4 (Sanches et al, 2019;Huttunen et al, 2003). Environmental factors, such as the external organic and nutrient loads, temperature and precipitation act as important driving factors for CH 4 emissions.…”

Section: Estimation Of Ghg Emissions From Surface Watersmentioning

confidence: 99%

“…Environmental factors, such as the external organic and nutrient loads, temperature and precipitation act as important driving factors for CH 4 emissions. Higher emissions occur where nutrient loading and air temperature and precipitation are high (Sanches et al, 2019;Huttunen et al, 2003). Nutrient loading increases primary production in aquatic systems.…”

Section: Estimation Of Ghg Emissions From Surface Watersmentioning

confidence: 99%

See 1 more Smart Citation

The potential impact of measures taken by water authorities on greenhouse gas emissions

et al. 2020

View full text Add to dashboard Cite

Water authorities responsible for water quantity and water quality management may strongly influence the magnitude of greenhouse gas emissions from the surface waters and the adjacent peat areas within their territories. Climate smart water management (reducing influx of organic matter and improving water quality) is therefore a potentially strong mitigation tool. We hypothesize that climate smart water management has a stronger mitigation potential than reducing emissions from the operational management of a Water Authority. Based on literature data on greenhouse gas emissions from ditches and agricultural peatlands, we present a case study of a Dutch Water Authority -Amstel, Gooi and Vecht (operated by Waternet). We estimate that greenhouse gas emissions from the 195 km 2 large peat area within its territory are 470 kt CO 2 -eq per year. An additional 231 kt CO 2 -eq yr −1 is emitted from the water bodies within the 102 km 2 large water area territory. Both emissions are considerably higher than the estimated climate footprint of the operational management of the water board (∼ 62 kt CO 2 -eq per year in 2017). While Waternet strives to have a net zero emission of greenhouse gases related to its operational management by 2020, we postulate that measures (to be taken before 2030) such as the prevention of organic matter and nutrients entering surface waters, the removal of organic carbon from ditches and higher groundwater levels in agricultural peatlands, may reduce greenhouse gas emissions in ditches and agricultural peat meadows with 26 and 27 kt CO 2 -eq per year, respectively. Measures that are taken to reduce greenhouse gas emissions in water bodies are expected to have a positive impact on water quality as well.

show abstract

Section: Estimation Of Ghg Emissions From Surface Watersmentioning

confidence: 99%

Section: Estimation Of Ghg Emissions From Surface Watersmentioning

confidence: 99%

The potential impact of measures taken by water authorities on greenhouse gas emissions

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Wetlands are likely to become the main net sources of C under the effect of warming climatic conditions in decades [64]. Sanches et al [66] determined the crucial factors related to the emission of CH 4 in lakes, on a large scale, observing emission patterns in different climate zones. The climate zones with the highest average air temperatures showed the highest emission rates.…”

Section: Sensitivity Of Floodplains To Climate Changementioning

confidence: 99%

Methane, Microbes and Models in Amazonian Floodplains: State of the Art and Perspectives

Barros¹,

Bento²,

Ferreira³

et al. 2020

Changing Ecosystems and Their Services

View full text Add to dashboard Cite

Amazon floodplain ecosystems include open water and intermittent flood forest and agricultural systems with different water types. They are a significant natural source of methane (CH 4) in the tropics. When soils are flooded and become anoxic, CH 4 is produced by methanogenesis, while microbially mediated aerobic and anaerobic oxidation of CH 4 serves as the primary biological sink of this greenhouse gas. Measurements of rates and controls on CH 4 production and emission in the Amazon basin mainly come from studies on individual wetlands and floodplain lakes. Similarly, microbial communities in those Amazon floodplain habitats have been studied on individual lakes based on sequence-specific DNA analysis. Existing biogeochemical ecosystem models of CH 4 from the Amazon floodplains focus on soil properties or involve factors such as pH, redox potentials, or substrates. None of these models incorporate appropriate seasonal inundation; neither the microbiota does it as a component. In this sense, our chapter will highlight how the important efforts already contributed to understand the CH 4 emission and its connections with abiotic and biotic factors in Amazon floodplains, as well as emphasize the need of encouraging cooperation and exchange of experience between research teams by using different approaches and scientific methods.

show abstract

“…The other pathway for gas to escape is ebullition, a transport mechanism with high spatiotemporal variability (Bastviken et al, 2004). Ebullition is frequently observed to be dominant in lakes, but is rarely quantified with regard to CH 4 emissions (Sanches, Guenet, Marinho, Barros, & Assis Esteves, 2019). It is especially important in shallow lakes (<20 m deep) as bubbles have lower hydrostatic pressure to overcome (Bastviken et al, 2004;Bastviken, Tranvik, Downing, Crill, & Enrich-Prast, 2011).…”

Section: Methane Flux Modeling Conflicts With Direct Measurementsmentioning

confidence: 99%

Biogeochemical and physical controls on methane fluxes from two ferruginous meromictic lakes

et al. 2019

View full text Add to dashboard Cite

Meromictic lakes with anoxic bottom waters often have active methane cycles whereby methane is generally produced biogenically under anoxic conditions and oxidized in oxic surface waters prior to reaching the atmosphere. Lakes that contain dissolved ferrous iron in their deep waters (i.e., ferruginous) are rare, but valuable, as geochemical analogues of the conditions that dominated the Earth's oceans during the Precambrian when interactions between the iron and methane cycles could have shaped the greenhouse regulation of the planet's climate. Here, we explored controls on the methane fluxes from Brownie Lake and Canyon Lake, two ferruginous meromictic lakes that contain similar concentrations (max. >1 mM) of dissolved methane in their bottom waters. The order Methanobacteriales was the dominant methanogen detected in both lakes. At Brownie Lake, methanogen abundance, an increase in methane concentration with respect to depths closer to the sediment, and isotopic data suggest methanogenesis is an active process in the anoxic water column. At Canyon Lake, methanogenesis occurred primarily in the sediment. The most abundant aerobic methane‐oxidizing bacteria present in both water columns were associated with the Gammaproteobacteria, with little evidence of anaerobic methane oxidizing organisms being present or active. Direct measurements at the surface revealed a methane flux from Brownie Lake that was two orders of magnitude greater than the flux from Canyon Lake. Comparison of measured versus calculated turbulent diffusive fluxes indicates that most of the methane flux at Brownie Lake was non‐diffusive. Although the turbulent diffusive methane flux at Canyon Lake was attenuated by methane oxidizing bacteria, dissolved methane was detected in the epilimnion, suggestive of lateral transport of methane from littoral sediments. These results highlight the importance of direct measurements in estimating the total methane flux from water columns, and that non‐diffusive transport of methane may be important to consider from other ferruginous systems.

show abstract

Global regulation of methane emission from natural lakes

Cited by 74 publications

References 52 publications

The potential impact of measures taken by water authorities on greenhouse gas emissions

The potential impact of measures taken by water authorities on greenhouse gas emissions

Methane, Microbes and Models in Amazonian Floodplains: State of the Art and Perspectives

Biogeochemical and physical controls on methane fluxes from two ferruginous meromictic lakes

Contact Info

Product

Resources

About