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dc.contributor.authorGuerrero-Cruz, Simon
dc.contributor.authorVaksmaa, Annika
dc.contributor.authorHorn, Marcus A.
dc.contributor.authorNiemann, Helge
dc.contributor.authorPijuan, Maite
dc.contributor.authorHo, Adrian
dc.date.accessioned2021-06-15T09:13:08Z
dc.date.available2021-06-15T09:13:08Z
dc.date.issued2021-05-14
dc.description.abstractMethane is the final product of the anaerobic decomposition of organic matter. The conversion of organic matter to methane (methanogenesis) as a mechanism for energy conservation is exclusively attributed to the archaeal domain. Methane is oxidized by methanotrophic microorganisms using oxygen or alternative terminal electron acceptors. Aerobic methanotrophic bacteria belong to the phyla Proteobacteria and Verrucomicrobia, while anaerobic methane oxidation is also mediated by more recently discovered anaerobic methanotrophs with representatives in both the bacteria and the archaea domains. The anaerobic oxidation of methane is coupled to the reduction of nitrate, nitrite, iron, manganese, sulfate, and organic electron acceptors (e.g., humic substances) as terminal electron acceptors. This review highlights the relevance of methanotrophy in natural and anthropogenically influenced ecosystems, emphasizing the environmental conditions, distribution, function, co-existence, interactions, and the availability of electron acceptors that likely play a key role in regulating their function. A systematic overview of key aspects of ecology, physiology, metabolism, and genomics is crucial to understand the contribution of methanotrophs in the mitigation of methane efflux to the atmosphere. We give significance to the processes under microaerophilic and anaerobic conditions for both aerobic and anaerobic methane oxidizers. In the context of anthropogenically influenced ecosystems, we emphasize the current and potential future applications of methanotrophs from two different angles, namely methane mitigation in wastewater treatment through the application of anaerobic methanotrophs, and the biotechnological applications of aerobic methanotrophs in resource recovery from methane waste streams. Finally, we identify knowledge gaps that may lead to opportunities to harness further the biotechnological benefits of methanotrophs in methane mitigation and for the production of valuable bioproducts enabling a bio-based and circular economy.en_US
dc.identifier.citationGuerrero-Cruz, Vaksmaa, Horn, Niemann H, Pijuan M, Ho. Methanotrophs: Discoveries, Environmental Relevance, and a Perspective on Current and Future Applications. Frontiers in Microbiology. 2021;12:1-28en_US
dc.identifier.cristinIDFRIDAID 1915497
dc.identifier.doi10.3389/fmicb.2021.678057
dc.identifier.issn1664-302X
dc.identifier.urihttps://hdl.handle.net/10037/21400
dc.language.isoengen_US
dc.publisherFrontiers Mediaen_US
dc.relation.journalFrontiers in Microbiology
dc.relation.projectIDEU: 772923en_US
dc.relation.projectIDEC/H2020: 892322en_US
dc.relation.projectIDinfo:eu-repo/grantAgreement/EC/MICROWATER/892322/Norway/Anaerobic methane oxidation processes in wastewater management, as sustainable applications against climate change//en_US
dc.rights.accessRightsopenAccessen_US
dc.rights.holderCopyright 2021 The Author(s)en_US
dc.subjectVDP::Medical disciplines: 700en_US
dc.subjectVDP::Medisinske Fag: 700en_US
dc.titleMethanotrophs: Discoveries, Environmental Relevance, and a Perspective on Current and Future Applicationsen_US
dc.type.versionpublishedVersionen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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