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Production and consumption of methane in freshwater lake ecosystems |
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| Authors: | Borrel Guillaume Jézéquel Didier Biderre-Petit Corinne Morel-Desrosiers Nicole Morel Jean-Pierre Peyret Pierre Fonty Gérard Lehours Anne-Catherine |
| Affiliation: | a Clermont Université, Universite Blaise Pascal, Laboratoire Microorganismes: Génome et Environnement, BP 10448, UMR CNRS 6023, 63000 Clermont-Ferrand, France b Clermont Université, Université d’Auvergne, Laboratoire Microorganismes: Génome et, Environnement, BP 10448, F63000, Clermont-Ferrand, France c Université Paris 7, Laboratoire de Géochimie des Eaux, Institut de Physique du Globe de Paris, UMR CNRS 7154, 35 rue Hélène Brion, 75205 Paris Cedex 13, France d UMR CNRS 7154, Université Paris 7, 75205 Paris Cedex 13, France |
| Abstract: | The atmospheric concentration of methane (CH4), a major greenhouse gas, is mainly controlled by the activities of methane-producing (methanogens) and methane-consuming (methanotrophs) microorganisms. Freshwater lakes are identified as one of the main CH4 sources, as it was estimated that they contribute to 6-16% of natural CH4 emissions. It is therefore critical to better understanding the biogeochemical cycling of CH4 in these ecosystems. In this paper, the effects of environmental factors on methanogenic and methanotrophic rates are reviewed and an inventory of the methanogens and methanotrophs at the genus/species level in freshwater lakes is given. We focus on the anaerobic oxidation of methane, which is a still poorly known process but increasingly reported in freshwater lakes. |
| Keywords: | Freshwater lakes Methane Methanogens Aerobic methanotrophs Anaerobic methanotrophs |
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