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Low N2O and variable CH4 fluxes from tropical forest soils of the Congo Basin

Author

Listed:
  • Matti Barthel

    (ETH Zurich)

  • Marijn Bauters

    (Ghent University)

  • Simon Baumgartner

    (ETH Zurich
    Université Catholique de Louvain)

  • Travis W. Drake

    (ETH Zurich)

  • Nivens Mokwele Bey

    (Institute Congolais pour la Conservation de la Nature)

  • Glenn Bush

    (Woodwell Climate Research Center)

  • Pascal Boeckx

    (Ghent University)

  • Clement Ikene Botefa

    (Institute Congolais pour la Conservation de la Nature)

  • Nathanaël Dériaz

    (ETH Zurich)

  • Gode Lompoko Ekamba

    (Institute Congolais pour la Conservation de la Nature)

  • Nora Gallarotti

    (ETH Zurich)

  • Faustin M. Mbayu

    (Université de Kisangani)

  • John Kalume Mugula

    (Université Officielle de Bukavu)

  • Isaac Ahanamungu Makelele

    (Ghent University)

  • Christian Ekamba Mbongo

    (Coordination Provinciale de l’environnement)

  • Joachim Mohn

    (Laboratory for Air Pollution/Environmental Technology)

  • Joseph Zambo Mandea

    (Woodwell Climate Research Center)

  • Davin Mata Mpambi

    (Institute Congolais pour la Conservation de la Nature)

  • Landry Cizungu Ntaboba

    (Université Catholique de Bukavu)

  • Montfort Bagalwa Rukeza

    (Observatoire Volcanologique de Goma)

  • Robert G. M. Spencer

    (Florida State Universtity)

  • Laura Summerauer

    (ETH Zurich)

  • Bernard Vanlauwe

    (International Institute of Tropical Agriculture)

  • Kristof Oost

    (Université Catholique de Louvain)

  • Benjamin Wolf

    (Institute of Meteorology and Climate Research (IMK))

  • Johan Six

    (ETH Zurich)

Abstract

Globally, tropical forests are assumed to be an important source of atmospheric nitrous oxide (N2O) and sink for methane (CH4). Yet, although the Congo Basin comprises the second largest tropical forest and is considered the most pristine large basin left on Earth, in situ N2O and CH4 flux measurements are scarce. Here, we provide multi-year data derived from on-ground soil flux (n = 1558) and riverine dissolved gas concentration (n = 332) measurements spanning montane, swamp, and lowland forests. Each forest type core monitoring site was sampled at least for one hydrological year between 2016 - 2020 at a frequency of 7-14 days. We estimate a terrestrial CH4 uptake (in kg CH4-C ha−1 yr−1) for montane (−4.28) and lowland forests (−3.52) and a massive CH4 release from swamp forests (non-inundated 2.68; inundated 341). All investigated forest types were a N2O source (except for inundated swamp forest) with 0.93, 1.56, 3.5, and −0.19 kg N2O-N ha−1 yr−1 for montane, lowland, non-inundated swamp, and inundated swamp forests, respectively.

Suggested Citation

  • Matti Barthel & Marijn Bauters & Simon Baumgartner & Travis W. Drake & Nivens Mokwele Bey & Glenn Bush & Pascal Boeckx & Clement Ikene Botefa & Nathanaël Dériaz & Gode Lompoko Ekamba & Nora Gallarotti, 2022. "Low N2O and variable CH4 fluxes from tropical forest soils of the Congo Basin," Nature Communications, Nature, vol. 13(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:13:y:2022:i:1:d:10.1038_s41467-022-27978-6
    DOI: 10.1038/s41467-022-27978-6
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    Cited by:

    1. Justin D. Gay & Bryce Currey & E. N. J. Brookshire, 2022. "Global distribution and climate sensitivity of the tropical montane forest nitrogen cycle," Nature Communications, Nature, vol. 13(1), pages 1-8, December.

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