Methane production and its fate in paddy fields

Murase, Jun; Kimura, Makoto

doi:10.1080/00380768.1994.10413328

Cited by 29 publications

(3 citation statements)

References 15 publications

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“…To our knowledge, only indirect evidence has been published for AOM in mineral soils. Several studies have indicated that AOM may occur in flooded rice paddy soils [Miura et al, 1992;Murase and Kimura, 1994a, 1994b, 1994c, but the experimental designs were not necessarily strictly anoxic and AOM in these soils has yet to be verified with a direct approach. However, AOM has been directly observed in peat soils.…”

Section: Discussionmentioning

confidence: 99%

Anaerobic oxidation of methane in tropical and boreal soils: Ecological significance in terrestrial methane cycling

et al. 2012

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[1] Anaerobic oxidation of methane (AOM) is a considerable sink for the greenhouse gas methane (CH 4 ) in marine systems, but the importance of this process in terrestrial systems is less clear. Lowland boreal soils and wet tropical soils are two hot spots for CH 4 cycling, yet AOM has been essentially uncharacterized in these systems. We investigated AOM in soils from sites in Alaska and Puerto Rico. Isotope tracers were utilized in vitro to enable the simultaneous quantification of CH 4 production and consumption without use of biological inhibitors. Boreal peat soil and tropical mineral soil oxidized small but significant quantities of CH 4 to CO 2 under anoxic conditions (p < 0.001). Potential AOM rates were 21 AE 2 nmol g dw À1 d À1 and 2.9 AE 0.5 nmol g dw À1 d À1 for the boreal and tropical soils, respectively. The addition of terminal electron acceptors (NO 3 À , Fe(III), and SO 4 2À ) inhibited AOM and methanogenesis in both soils. In all incubations, CH 4 production occurred simultaneously with AOM, and CH 4 production rates were always greater than AOM rates. There was a strong correlation between the quantity of CH 4 produced and the amount of CH 4 oxidized under anoxic conditions (Alaska: r = 0.875, p < 0.0001; Puerto Rico: r = 0.817, p < 0.0001). CH 4 oxidation under anoxic conditions was biological and likely mediated by methanogenic archaea. While only a small percentage of the total CH 4 produced in these soils was oxidized under anoxic conditions (0.3% and 0.8% for Alaskan and Puerto Rican Soils), this process is important to understand since it could play a measurable role in controlling net CH 4 flux.

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Section: Discussionmentioning

confidence: 99%

Anaerobic oxidation of methane in tropical and boreal soils: Ecological significance in terrestrial methane cycling

et al. 2012

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“… 2015 ), paddy field sediments (Miura et al . 1992 ; Murase and Kimura 1994 ), lake water (Crowe et al . 2011 ), a terrestrial mud volcano (Chang et al .…”

Section: General Introductionmentioning

confidence: 99%

The hunt for the most-wanted chemolithoautotrophic spookmicrobes

Zandt

Slomp

et al. 2018

FEMS Microbiology Ecology

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Microorganisms are the drivers of biogeochemical methane and nitrogen cycles. Essential roles of chemolithoautotrophic microorganisms in these cycles were predicted long before their identification. Dedicated enrichment procedures, metagenomics surveys and single-cell technologies have enabled the identification of several new groups of most-wanted spookmicrobes, including novel methoxydotrophic methanogens that produce methane from methylated coal compounds and acetoclastic ‘Candidatus Methanothrix paradoxum’, which is active in oxic soils. The resultant energy-rich methane can be oxidized via a suite of electron acceptors. Recently, ‘Candidatus Methanoperedens nitroreducens’ ANME-2d archaea and ‘Candidatus Methylomirabilis oxyfera’ bacteria were enriched on nitrate and nitrite under anoxic conditions with methane as an electron donor. Although ‘Candidatus Methanoperedens nitroreducens’ and other ANME archaea can use iron citrate as an electron acceptor in batch experiments, the quest for anaerobic methane oxidizers that grow via iron reduction continues. In recent years, the nitrogen cycle has been expanded by the discovery of various ammonium-oxidizing prokaryotes, including ammonium-oxidizing archaea, versatile anaerobic ammonium-oxidizing (anammox) bacteria and complete ammonium-oxidizing (comammox) Nitrospira bacteria. Several biogeochemical studies have indicated that ammonium conversion occurs under iron-reducing conditions, but thus far no microorganism has been identified. Ultimately, iron-reducing and sulfate-dependent ammonium-oxidizing microorganisms await discovery.

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“…AOM is possible in freshwater sediments, and can oxidize dissolved methane before bubbles form. Previously, sulfate-coupled AOM has been reported in eutrophic lakes (Eller et al, 2005), shallow thermokarst lakes (Wik et al, 2020;Winkel et al, 2019), rice paddies (Murase and Kimura, 1994), and peatlands (Smemo and Yavitt, 2007). This process is viable at Upper Mystic Lake, as bottom waters are sulfidic.…”

Section: Controls On Molecular and Isotopologue Variations In Upper M...mentioning

confidence: 92%

The biogeochemistry of methane isotopologues in marine and lacustrine sediments

Lalk¹

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Methane is a globally significant greenhouse gas, energy resource, and it is a product and reactant of microbial metabolisms. Multiple sources and sinks of methane can be challenging to distinguish from each other, thus complicating the understanding of methane budgets and the effects of microbes on mediating Earth’s carbon cycle. The relative abundances of methane isotopologues (e.g., 12CH4, 13CH4, 12CH3D, and 13CH3D) record process-based information about the formation conditions, transport, and fate of methane, and in select environments can serve as a temperature proxy. This geochemical tool is herein applied to methane from marine and lacustrine sediments to test assumptions about prevailing mechanisms of its formation and consumption in these settings. This thesis describes 1) three studies about biogeochemical insights gained by quantifying the relative abundance of clumped methane isotopologue, 13CH3D, in samples from marine and lacustrine sediments, and 2) one foray into method development to improve the quantification of methane in these environments. Chapter 2 presents a global survey of marine gas hydrates where isotope-based temperatures are used to assess whether linkages between methane sources and seepage-associated seafloor features match putative geologic models. Chapter 3 describes two kilometer-scale profiles of methane isotopologues from marine sediments, where the relationship between expected sediment temperature and isotope-based temperature is used to evaluate the temperature limit of microbial processing and abiotic re-equilibration mechanisms. Chapter 4 reports the largest set of methane isotopologue data from ebullition in a single lake basin, which is used to gauge the relative importance of aerobic and anaerobic methane oxidation in the study site and recommend a general sampling strategy to constrain methane source signatures in similar lake settings. Chapter 5 explains the development of a method to quantify the in situ concentration of methane based on ratios of dissolved gases, and its comparison to four other methane quantification methods for surface sediments from marine cold seeps. The findings from this research contribute to ongoing efforts to understand the sedimentary carbon cycle and microbial activity in remote environments.

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Methane production and its fate in paddy fields

Cited by 29 publications

References 15 publications

Anaerobic oxidation of methane in tropical and boreal soils: Ecological significance in terrestrial methane cycling

Anaerobic oxidation of methane in tropical and boreal soils: Ecological significance in terrestrial methane cycling

The hunt for the most-wanted chemolithoautotrophic spookmicrobes

The biogeochemistry of methane isotopologues in marine and lacustrine sediments

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