Global co-occurrence of methanogenic archaea and methanotrophic bacteria in Microcystis aggregates.

Autor: Li C; Department of Microbiology and Plant Biology, Institute for Energy and the Environment, The University of Oklahoma, Norman, Ok, USA., Hambright KD; Plankton Ecology and Limnology Laboratory, Program in Ecology and Evolutionary Biology, and the Geographical Ecology Group, Department of Biology, The University of Oklahoma, Norman, OK, USA., Bowen HG; Department of Microbiology and Immunology, The University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA., Trammell MA; Biomedical Research Center, The University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA., Grossart HP; Department of Experimental Limnology, Leibniz Institute for Freshwater Ecology and Inland Fisheries, Stechlin, and Institute for Biochemistry and Biology, Potsdam University, Potsdam, Germany., Burford MA; Australian Rivers Institute and School of Environment and Science, Griffith University, Nathan, Qld, Australia., Hamilton DP; Australian Rivers Institute, Griffith University, Nathan, Qld, Australia., Jiang H; State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, China., Latour D; Université Clermont Auvergne CNRS, LMGE, Aubière Cedex, France., Meyer EI; Institute for Evolution and Biodiversity, University of Münster, Münster, Germany., Padisák J; Research Group of Limnology, Centre of Natural Sciences, University of Pannonia, Veszprém, Hungary., Zamor RM; Grand River Dam Authority, Vinita, OK, USA., Krumholz LR; Department of Microbiology and Plant Biology, Institute for Energy and the Environment, The University of Oklahoma, Norman, Ok, USA.
Jazyk: angličtina
Zdroj: Environmental microbiology [Environ Microbiol] 2021 Nov; Vol. 23 (11), pp. 6503-6519. Date of Electronic Publication: 2021 Aug 08.
DOI: 10.1111/1462-2920.15691
Abstrakt: Global warming and eutrophication contribute to the worldwide increase in cyanobacterial blooms, and the level of cyanobacterial biomass is strongly associated with rises in methane emissions from surface lake waters. Hence, methane-metabolizing microorganisms may be important for modulating carbon flow in cyanobacterial blooms. Here, we surveyed methanogenic and methanotrophic communities associated with floating Microcystis aggregates in 10 lakes spanning four continents, through sequencing of 16S rRNA and functional marker genes. Methanogenic archaea (mainly Methanoregula and Methanosaeta) were detectable in 5 of the 10 lakes and constituted the majority (~50%-90%) of the archaeal community in these lakes. Three of the 10 lakes contained relatively more abundant methanotrophs than the other seven lakes, with the methanotrophic genera Methyloparacoccus, Crenothrix, and an uncultured species related to Methylobacter dominating and nearly exclusively found in each of those three lakes. These three are among the five lakes in which methanogens were observed. Operational taxonomic unit (OTU) richness and abundance of methanotrophs were strongly positively correlated with those of methanogens, suggesting that their activities may be coupled. These Microcystis-aggregate-associated methanotrophs may be responsible for a hitherto overlooked sink for methane in surface freshwaters, and their co-occurrence with methanogens sheds light on the methane cycle in cyanobacterial aggregates.
(© 2021 Society for Applied Microbiology and John Wiley & Sons Ltd.)
Databáze: MEDLINE
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