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Oxic water column methanogenesis as a major component of aquatic CH4 fluxes

Author

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  • Matthew J Bogard

    (Groupe de Recherche Interuniversitaire en Limnologie, Université du Québec à Montréal)

  • Paul A del Giorgio

    (Groupe de Recherche Interuniversitaire en Limnologie, Université du Québec à Montréal)

  • Lennie Boutet

    (Groupe de Recherche Interuniversitaire en Limnologie, Université du Québec à Montréal)

  • Maria Carolina Garcia Chaves

    (Groupe de Recherche Interuniversitaire en Limnologie, Université du Québec à Montréal)

  • Yves T Prairie

    (Groupe de Recherche Interuniversitaire en Limnologie, Université du Québec à Montréal)

  • Anthony Merante

    (Groupe de Recherche Interuniversitaire en Limnologie, Université du Québec à Montréal)

  • Alison M Derry

    (Groupe de Recherche Interuniversitaire en Limnologie, Université du Québec à Montréal)

Abstract

Methanogenesis has traditionally been assumed to occur only in anoxic environments, yet there is mounting, albeit indirect, evidence of methane (CH4) production in oxic marine and freshwaters. Here we present the first direct, ecosystem-scale demonstration of methanogenesis in oxic lake waters. This methanogenesis appears to be driven by acetoclastic production, and is closely linked to algal dynamics. We show that oxic water methanogenesis is a significant component of the overall CH4 budget in a small, shallow lake, and provide evidence that this pathway may be the main CH4 source in large, deep lakes and open oceans. Our results challenge the current global understanding of aquatic CH4 dynamics, and suggest a hitherto unestablished link between pelagic CH4 emissions and surface-water primary production. This link may be particularly sensitive to widespread and increasing human influences on aquatic ecosystem primary productivity.

Suggested Citation

  • Matthew J Bogard & Paul A del Giorgio & Lennie Boutet & Maria Carolina Garcia Chaves & Yves T Prairie & Anthony Merante & Alison M Derry, 2014. "Oxic water column methanogenesis as a major component of aquatic CH4 fluxes," Nature Communications, Nature, vol. 5(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:5:y:2014:i:1:d:10.1038_ncomms6350
    DOI: 10.1038/ncomms6350
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    Cited by:

    1. Elisabet Perez-Coronel & J. Michael Beman, 2022. "Multiple sources of aerobic methane production in aquatic ecosystems include bacterial photosynthesis," Nature Communications, Nature, vol. 13(1), pages 1-14, December.
    2. Jager, Henriette I. & Griffiths, Natalie A. & Hansen, Carly H. & King, Anthony W. & Matson, Paul G. & Singh, Debjani & Pilla, Rachel M., 2022. "Getting lost tracking the carbon footprint of hydropower," Renewable and Sustainable Energy Reviews, Elsevier, vol. 162(C).
    3. Pavel Serov & Rune Mattingsdal & Monica Winsborrow & Henry Patton & Karin Andreassen, 2023. "Widespread natural methane and oil leakage from sub-marine Arctic reservoirs," Nature Communications, Nature, vol. 14(1), pages 1-12, December.
    4. César Ordóñez & Tonya DelSontro & Timon Langenegger & Daphne Donis & Ena L. Suarez & Daniel F. McGinnis, 2023. "Evaluation of the methane paradox in four adjacent pre-alpine lakes across a trophic gradient," Nature Communications, Nature, vol. 14(1), pages 1-13, December.

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