Crenothrix are major methane consumers in stratified lakes
Rattachement africain : ch, de, dk, at. Niveau de preuve : code pays fourni par la source.
Le résumé fourni par la source
Abstract Methane-oxidizing bacteria represent a major biological sink for methane and are thus Earth’s natural protection against this potent greenhouse gas. Here we show that in two stratified freshwater lakes a substantial part of upward-diffusing methane was oxidized by filamentous gamma-proteobacteria related to Crenothrix polyspora. These filamentous bacteria have been known as contaminants of drinking water supplies since 1870, but their role in the environmental methane removal has remained unclear. While oxidizing methane, these organisms were assigned an ‘unusual’ methane monooxygenase (MMO), which was only distantly related to ‘classical’ MMO of gamma-proteobacterial methanotrophs. We now correct this assignment and show that Crenothrix encode a typical gamma-proteobacterial PmoA. Stable isotope labeling in combination swith single-cell imaging mass spectrometry revealed methane-dependent growth of the lacustrine Crenothrix with oxygen as well as under oxygen-deficient conditions. Crenothrix genomes encoded pathways for the respiration of oxygen as well as for the reduction of nitrate to N2O. The observed abundance and planktonic growth of Crenothrix suggest that these methanotrophs can act as a relevant biological sink for methane in stratified lakes and should be considered in the context of environmental removal of methane.
Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.
Le contrôle bibliographique ouvert
DOI retrouvé dans Crossref DOI retrouvé, mais le titre doit être comparé manuellement.
- Titre Crossref
- <i>Crenothrix</i> are major methane consumers in stratified lakes
- Date Crossref
- 06/06/2017
- Éditeur
- Oxford University Press (OUP)
- Type
- journal-article
Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude, et il ne compte pas comme une seconde source scientifique indépendante.
Où se fait cette recherche
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ETH Zurich pays non établi dans la noticeUniversité ou école supérieure
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Institute of Biogeochemistry and Pollutant Dynamics Department of Environmental Systems Science pays non établi dans la noticeStructure de recherche
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Swiss Federal Institute of Aquatic Science and Technology Department of Surface Waters—Research and Management pays non établi dans la noticeStructure de recherche
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Max Planck Institute for Marine Microbiology Department of Biogeochemistry pays non établi dans la noticeStructure de recherche
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Aalborg University Department of Chemistry and Bioscience pays non établi dans la noticeUniversité ou école supérieure
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University of Vienna Department of Microbiology and Ecosystem Science pays non établi dans la noticeUniversité ou école supérieure
ETH Zurich, Department of Environmental Systems Science — Institute of Biogeochemistry and Pollutant Dynamics et Department of Surface Waters—Research and Management — Swiss Federal Institute of Aquatic Science and Technology, avec 3 autres affiliations.
Une affiliation ne permet pas de déduire la nationalité d’un auteur.