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    Phenology is the dominant control of methane emissions in a tropical non-forested wetland

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    Date
    2022-01-10
    Author
    Hefter, Carol
    Gondwe, Mangaliso
    Murray-Hudson, Michael
    Makati, Anastacia
    Lunt, Mark F.
    Palmer, Paul, I.
    Skiba, Ute
    Publisher
    Springer Nature, https://www.springernature.com
    Link
    https://www.nature.com/articles/s41467-021-27786-4#article-info
    Type
    Published Article
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    Abstract
    Tropical wetlands are a significant source of atmospheric methane (CH4), but their importance to the global CH4 budget is uncertain due to a paucity of direct observations. Net wetland emissions result from complex interactions and co-variation between microbial production and oxidation in the soil, and transport to the atmosphere. Here we show that phenology is the overarching control of net CH4 emissions to the atmosphere from a permanent, vegetated tropical swamp in the Okavango Delta, Botswana, and we find that vegetative processes modulate net CH4 emissions at sub-daily to inter-annual timescales. Without considering the role played by papyrus on regulating the efflux of CH4 to the atmosphere, the annual budget for the entire Okavango Delta, would be under- or over-estimated by a factor of two. Our measurements demonstrate the importance of including vegetative processes such as phenological cycles into wetlands emission budgets of CH4.
    URI
    http://hdl.handle.net/10311/2512
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    • Research articles (ORI) [270]

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