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Low N$_{2}$O and variable CH$_{4}$ fluxes from tropical forest soils of the Congo Basin

Barthel, M.; Bauters, M.; Baumgartner, S.; Drake, T. W.; Bey, N. M.; Bush, G.; Boeckx, P.; Botefa, C. I.; Dériaz, N.; Ekamba, G. L.; Gallarotti, N.; Mbayu, F. M.; Mugula, J. K.; Makelele, I. A.; Mbongo, C. E.; Mohn, J.; Mandea, J. Z.; Mpambi, D. M.; Ntaboba, L. C.; ... mehr

Abstract:

Globally, tropical forests are assumed to be an important source of atmospheric nitrous oxide (N$_{2}$O) and sink for methane (CH$_{4}$). Yet, although the Congo Basin comprises the second largest tropical forest and is considered the most pristine large basin left on Earth, in situ N$_{2}$O and CH$_{4}$ 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 CH$_{4}$ uptake (in kg CH$_{4}$-C ha$^{-1}$ yr$^{-1}$) for montane (−4.28) and lowland forests (−3.52) and a massive CH$_{4}$ release from swamp forests (non-inundated 2.68; inundated 341). All investigated forest types were a N$_{2}$O source (except for inundated swamp forest) with 0.93, 1.56, 3.5, and −0.19 kg N$_{2}$O-N ha$^{-1}$ yr$^{-1}$ for montane, lowland, non-inundated swamp, and inundated swamp forests, respectively.


Verlagsausgabe §
DOI: 10.5445/IR/1000142649
Veröffentlicht am 03.02.2022
Originalveröffentlichung
DOI: 10.1038/s41467-022-27978-6
Scopus
Zitationen: 14
Web of Science
Zitationen: 14
Dimensions
Zitationen: 17
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung – Atmosphärische Umweltforschung (IMK-IFU)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2022
Sprache Englisch
Identifikator ISSN: 2041-1723
KITopen-ID: 1000142649
HGF-Programm 12.11.22 (POF IV, LK 01) Managed ecosystems as sources and sinks of GHGs
Erschienen in Nature Communications
Verlag Nature Research
Band 13
Heft 1
Seiten Art.-Nr.: 330
Nachgewiesen in Dimensions
Scopus
Web of Science
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