Microbial methane emissions from the non-methanogenesis processes: A critical review.

Liu, L-Y; Xie, G-J; Ding, J; Liu, B-F; Xing, D-F; Ren, N-Q; Wang, Q

Microbial methane emissions from the non-methanogenesis processes: A critical review.

Liu, L-Y Xie, G-J Ding, J Liu, B-F Xing, D-F Ren, N-Q Wang, Q

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Publisher:: Elsevier
Publication Type:: Journal Article
Citation:: Science of the Total Environment, 2022, 806, (Pt 4), pp. 1-11
Issue Date:: 2022-02-01

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Field	Value	Language
dc.contributor.author	Liu, L-Y
dc.contributor.author	Xie, G-J
dc.contributor.author	Ding, J
dc.contributor.author	Liu, B-F
dc.contributor.author	Xing, D-F
dc.contributor.author	Ren, N-Q
dc.contributor.author	Wang, Q https://orcid.org/0000-0002-5744-2331
dc.date.accessioned	2022-08-12T02:14:59Z
dc.date.available	2021-10-28
dc.date.available	2022-08-12T02:14:59Z
dc.date.issued	2022-02-01
dc.identifier.citation	Science of the Total Environment, 2022, 806, (Pt 4), pp. 1-11
dc.identifier.issn	0048-9697
dc.identifier.issn	1879-1026
dc.identifier.uri	http://hdl.handle.net/10453/159997
dc.description.abstract	Methane, a potent greenhouse gas of global importance, has traditionally been considered as an end product of microbial methanogenesis of organic matter. Paradoxically, growing evidence has shown that some microbes, such as cyanobacteria, algae, fungi, purple non-sulfur bacteria, and cryptogamic covers, produce methane in oxygen-saturated aquatic and terrestrial ecosystems. The non-methanogenesis process could be an important potential contributor to methane emissions. This systematic review summarizes the knowledge of microorganisms involved in the non-methanogenesis process and the possible mechanisms of methane formation. Cyanobacteria-derived methane production may be attributed to either demethylation of methyl phosphonates or linked to light-driven primary productivity, while algae produce methane by utilizing methylated sulfur compounds as possible carbon precursors. In addition, fungi produce methane by utilizing methionine as a possible carbon precursor, and purple non-sulfur bacteria reduce carbon dioxide to methane by nitrogenase. The microbial methane distribution from the non-methanogenesis processes in aquatic and terrestrial environments and its environmental significance to global methane emissions, possible mechanisms of methane production in each open water, water-to-air methane fluxes, and the impact of climate change on microorganisms are also discussed. Finally, future perspectives are highlighted, such as establishing more in-situ experiments, quantifying methane flux through optimizing empirical models, distinguishing individual methane sources, and investigating nitrogenase-like enzyme systems to improve our understanding of microbial methane emission from the non-methanogenesis process.
dc.format	Print-Electronic
dc.language	eng
dc.publisher	Elsevier
dc.relation	http://purl.org/au-research/grants/arc/DP200100933
dc.relation.ispartof	Science of the Total Environment
dc.relation.isbasedon	10.1016/j.scitotenv.2021.151362
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject.classification	Environmental Sciences
dc.subject.mesh	Carbon Dioxide
dc.subject.mesh	Cyanobacteria
dc.subject.mesh	Ecosystem
dc.subject.mesh	Methane
dc.subject.mesh	Nitrogenase
dc.subject.mesh	Carbon Dioxide
dc.subject.mesh	Cyanobacteria
dc.subject.mesh	Ecosystem
dc.subject.mesh	Methane
dc.subject.mesh	Nitrogenase
dc.subject.mesh	Cyanobacteria
dc.subject.mesh	Carbon Dioxide
dc.subject.mesh	Methane
dc.subject.mesh	Nitrogenase
dc.subject.mesh	Ecosystem
dc.title	Microbial methane emissions from the non-methanogenesis processes: A critical review.
dc.type	Journal Article
utslib.citation.volume	806
utslib.location.activity	Netherlands
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
pubs.organisational-group	/University of Technology Sydney/Strength - CTWW - Centre for Technology in Water and Wastewater Treatment
utslib.copyright.status	closed_access	*
pubs.consider-herdc	false
dc.date.updated	2022-08-12T02:14:58Z
pubs.issue	Pt 4
pubs.publication-status	Published
pubs.volume	806
utslib.citation.issue	Pt 4

Abstract:

Methane, a potent greenhouse gas of global importance, has traditionally been considered as an end product of microbial methanogenesis of organic matter. Paradoxically, growing evidence has shown that some microbes, such as cyanobacteria, algae, fungi, purple non-sulfur bacteria, and cryptogamic covers, produce methane in oxygen-saturated aquatic and terrestrial ecosystems. The non-methanogenesis process could be an important potential contributor to methane emissions. This systematic review summarizes the knowledge of microorganisms involved in the non-methanogenesis process and the possible mechanisms of methane formation. Cyanobacteria-derived methane production may be attributed to either demethylation of methyl phosphonates or linked to light-driven primary productivity, while algae produce methane by utilizing methylated sulfur compounds as possible carbon precursors. In addition, fungi produce methane by utilizing methionine as a possible carbon precursor, and purple non-sulfur bacteria reduce carbon dioxide to methane by nitrogenase. The microbial methane distribution from the non-methanogenesis processes in aquatic and terrestrial environments and its environmental significance to global methane emissions, possible mechanisms of methane production in each open water, water-to-air methane fluxes, and the impact of climate change on microorganisms are also discussed. Finally, future perspectives are highlighted, such as establishing more in-situ experiments, quantifying methane flux through optimizing empirical models, distinguishing individual methane sources, and investigating nitrogenase-like enzyme systems to improve our understanding of microbial methane emission from the non-methanogenesis process.

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http://hdl.handle.net/10453/159997