No evidence for substantial aerobic methane emission by terrestrial plants: a <sup>13</sup>C‐labelling approach

Dueck, T.A.; Visser, R.G.F.; Poorter, Hendrik; Persijn, Stefan; Gorissen, A.; Visser, W. de; Schapendonk, A.H.C.M.; Verhagen, A.; Snel, J.; Harren, F.J.M.; Ngai, A.K.Y.; Verstappen, Francel; Bouwmeester, Harro J.; Voesenek, Laurentius A. C. J.; Werf, Adrie van der

doi:10.1111/j.1469-8137.2007.02103.x

Cited by 160 publications

(168 citation statements)

References 22 publications

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“…Several studies have reported opposite results that no measurable CH 4 release from plants was detected (Beerling et al, 2008;Bowling et al, 2009;Dueck et al, 2007;Kirschbaum and Walcroft, 2008;Nisbet et al, 2009;Smeets et al, 2009;Takahashi et al, 2012). One potential explanation for the absence of CH 4 emissions is that the CH 4 produced was consumed by endophytic methanotrophs.…”

Section: Uncertainties and Limitationsmentioning

confidence: 85%

A novel pathway of direct methane production and emission by eukaryotes including plants, animals and fungi: An overview

Liu

Chen

Zhu

et al. 2015

Atmospheric Environment

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Section: Uncertainties and Limitationsmentioning

confidence: 85%

A novel pathway of direct methane production and emission by eukaryotes including plants, animals and fungi: An overview

Liu

Chen

Zhu

et al. 2015

Atmospheric Environment

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“…This pathway was criticized (e.g. Dueck et al, 2007;Nisbet et al, 2009), and although numerous studies have since confirmed aerobic emissions from plants and better resolved its physical drivers (Fraser et al, 2015), global estimates still vary by 2 orders of magnitude meaning any potential implication for the global methane budget remains highly uncertain. Second, plants act as "straws", drawing methane produced by microbes in anoxic soils (Rice et al, 2010;Cicerone and Shetter, 1981).…”

Section: Vegetationmentioning

confidence: 99%

The global methane budget 2000–2012

Saunois

Bousquet

Poulter

et al. 2016

Earth Syst. Sci. Data

945

733

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Abstract. The global methane (CH 4 ) budget is becoming an increasingly important component for managing realistic pathways to mitigate climate change. This relevance, due to a shorter atmospheric lifetime and a stronger warming potential than carbon dioxide, is challenged by the still unexplained changes of atmospheric CH 4 over the past decade. Emissions and concentrations of CH 4 are continuing to increase, making CH 4 the second most important human-induced greenhouse gas after carbon dioxide. Two major difficulties in reducing uncertainties come from the large variety of diffusive CH 4 sources that overlap geographically, and from the destruction of CH 4 by the very short-lived hydroxyl radical (OH). To address these difficulties, we have established a consortium of multi-disciplinary scientists under the umbrella of the Global Carbon Project to synthesize and stimulate research on the methane cycle, and producing regular (∼ biennial) updates of the global methane budget. This consortium includes atmospheric physicists and chemists, biogeochemists of surface and marine emissions, and socio-economists who study anthropogenic emissions. Following Kirschke et al. (2013), we propose here the first version of a living review paper that integrates results of top-down studies (exploiting atmospheric observations within an atmospheric inverse-modelling framework) and bottom-up models, inventories and data-driven approaches (including process-based models for estimating land surface emissions and atmospheric chemistry, and inventories for anthropogenic emissions, data-driven extrapolations). . Top-down inversions consistently infer lower emissions in China (∼ 58 Tg CH 4 yr −1 , range 51-72, −14 %) and higher emissions in Africa (86 Tg CH 4 yr −1 , range 73-108, +19 %) than bottom-up values used as prior estimates. Overall, uncertainties for anthropogenic emissions appear smaller than those from natural sources, and the uncertainties on source categories appear larger for top-down inversions than for bottom-up inventories and models.The most important source of uncertainty on the methane budget is attributable to emissions from wetland and other inland waters. We show that the wetland extent could contribute 30-40 % on the estimated range for wetland emissions. Other priorities for improving the methane budget include the following: (i) the development of process-based models for inland-water emissions, (ii) the intensification of methane observations at local scale (flux measurements) to constrain bottom-up land surface models, and at regional scale (surface networks and satellites) to constrain top-down inversions, (iii) improvements in the estimation of atmospheric loss by OH, and (iv) improvements of the transport models integrated in top-down inversions.

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“…In particular, CH 4 formation and emissions by both dead and living plants 8 has been intensely discussed in recent years 1,13,14 . It has been shown that CH 4 can be produced abiotically from plant material by exposing it to ultraviolet (UV) irradiation [15][16][17][18] .…”

mentioning

confidence: 99%

Abiotic methanogenesis from organosulphur compounds under ambient conditions

et al. 2014

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Methane in the environment is produced by both biotic and abiotic processes. Biomethanation involves the formation of methane by microbes that live in oxygen-free environments. Abiotic methane formation proceeds under conditions at elevated temperature and/or pressure. Here we present a chemical reaction that readily forms methane from organosulphur compounds under highly oxidative conditions at ambient atmospheric pressure and temperature. When using iron(II/III), hydrogen peroxide and ascorbic acid as reagents, S-methyl groups of organosulphur compounds are efficiently converted into methane. In a first step, methyl sulphides are oxidized to the corresponding sulphoxides. In the next step, demethylation of the sulphoxide via homolytic bond cleavage leads to methyl radical formation and finally to methane in high yields. Because sulphoxidation of methyl sulphides is ubiquitous in the environment, this novel chemical route might mimic methane formation in living aerobic organisms.

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No evidence for substantial aerobic methane emission by terrestrial plants: a ¹³C‐labelling approach

Cited by 160 publications

References 22 publications

A novel pathway of direct methane production and emission by eukaryotes including plants, animals and fungi: An overview

A novel pathway of direct methane production and emission by eukaryotes including plants, animals and fungi: An overview

The global methane budget 2000–2012

Abiotic methanogenesis from organosulphur compounds under ambient conditions

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No evidence for substantial aerobic methane emission by terrestrial plants: a 13C‐labelling approach

Cited by 160 publications

References 22 publications

A novel pathway of direct methane production and emission by eukaryotes including plants, animals and fungi: An overview

A novel pathway of direct methane production and emission by eukaryotes including plants, animals and fungi: An overview

The global methane budget 2000–2012

Abiotic methanogenesis from organosulphur compounds under ambient conditions

Contact Info

Product

Resources

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No evidence for substantial aerobic methane emission by terrestrial plants: a ¹³C‐labelling approach