Microbial methane oxidation efficiency and robustness during lake overturn

Abstract Many seasonally stratified lakes accumulate substantial amounts of the greenhouse gas methane in the anoxic zone. Methane oxidizing bacteria in the water column act as a converter, oxidizing methane into carbon dioxide and biomass before it reaches the atmosphere. Current observations and e...

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Autores principales:	M. Zimmermann, M. J. Mayr, H. Bürgmann, W. Eugster, T. Steinsberger, B. Wehrli, A. Brand, D. Bouffard
Formato:	article
Lenguaje:	EN
Publicado:	Wiley 2021
Materias:	Oceanography GC1-1581
Acceso en línea:	https://doaj.org/article/c8715eaa7ed046019a54632e34a31da7
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spelling	oai:doaj.org-article:c8715eaa7ed046019a54632e34a31da72021-11-08T07:38:24ZMicrobial methane oxidation efficiency and robustness during lake overturn2378-224210.1002/lol2.10209https://doaj.org/article/c8715eaa7ed046019a54632e34a31da72021-12-01T00:00:00Zhttps://doi.org/10.1002/lol2.10209https://doaj.org/toc/2378-2242Abstract Many seasonally stratified lakes accumulate substantial amounts of the greenhouse gas methane in the anoxic zone. Methane oxidizing bacteria in the water column act as a converter, oxidizing methane into carbon dioxide and biomass before it reaches the atmosphere. Current observations and estimates of this methane oxidation efficiency are diverging, especially for the lake overturn period. Here, we combine a model of turbulent mixing, gas exchange, and microbial growth with a comprehensive data set for autumn mixing to quantify the relevant physical and microbial processes for a 16 m deep, wind‐sheltered Swiss lake. Scenario analysis suggests that the methane converter is efficient and robust under a large range of mixing velocities and only rare events of pronounced surface cooling can trigger substantial outgassing. This case study combines in situ observation and a deterministic physically based model and suggests that the frequency of storms may strongly impact methane emissions for similar temperate lakes.M. ZimmermannM. J. MayrH. BürgmannW. EugsterT. SteinsbergerB. WehrliA. BrandD. BouffardWileyarticleOceanographyGC1-1581ENLimnology and Oceanography Letters, Vol 6, Iss 6, Pp 320-328 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Oceanography GC1-1581
spellingShingle	Oceanography GC1-1581 M. Zimmermann M. J. Mayr H. Bürgmann W. Eugster T. Steinsberger B. Wehrli A. Brand D. Bouffard Microbial methane oxidation efficiency and robustness during lake overturn
description	Abstract Many seasonally stratified lakes accumulate substantial amounts of the greenhouse gas methane in the anoxic zone. Methane oxidizing bacteria in the water column act as a converter, oxidizing methane into carbon dioxide and biomass before it reaches the atmosphere. Current observations and estimates of this methane oxidation efficiency are diverging, especially for the lake overturn period. Here, we combine a model of turbulent mixing, gas exchange, and microbial growth with a comprehensive data set for autumn mixing to quantify the relevant physical and microbial processes for a 16 m deep, wind‐sheltered Swiss lake. Scenario analysis suggests that the methane converter is efficient and robust under a large range of mixing velocities and only rare events of pronounced surface cooling can trigger substantial outgassing. This case study combines in situ observation and a deterministic physically based model and suggests that the frequency of storms may strongly impact methane emissions for similar temperate lakes.
format	article
author	M. Zimmermann M. J. Mayr H. Bürgmann W. Eugster T. Steinsberger B. Wehrli A. Brand D. Bouffard
author_facet	M. Zimmermann M. J. Mayr H. Bürgmann W. Eugster T. Steinsberger B. Wehrli A. Brand D. Bouffard
author_sort	M. Zimmermann
title	Microbial methane oxidation efficiency and robustness during lake overturn
title_short	Microbial methane oxidation efficiency and robustness during lake overturn
title_full	Microbial methane oxidation efficiency and robustness during lake overturn
title_fullStr	Microbial methane oxidation efficiency and robustness during lake overturn
title_full_unstemmed	Microbial methane oxidation efficiency and robustness during lake overturn
title_sort	microbial methane oxidation efficiency and robustness during lake overturn
publisher	Wiley
publishDate	2021
url	https://doaj.org/article/c8715eaa7ed046019a54632e34a31da7
work_keys_str_mv	AT mzimmermann microbialmethaneoxidationefficiencyandrobustnessduringlakeoverturn AT mjmayr microbialmethaneoxidationefficiencyandrobustnessduringlakeoverturn AT hburgmann microbialmethaneoxidationefficiencyandrobustnessduringlakeoverturn AT weugster microbialmethaneoxidationefficiencyandrobustnessduringlakeoverturn AT tsteinsberger microbialmethaneoxidationefficiencyandrobustnessduringlakeoverturn AT bwehrli microbialmethaneoxidationefficiencyandrobustnessduringlakeoverturn AT abrand microbialmethaneoxidationefficiencyandrobustnessduringlakeoverturn AT dbouffard microbialmethaneoxidationefficiencyandrobustnessduringlakeoverturn
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Microbial methane oxidation efficiency and robustness during lake overturn

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