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Spatial variation of soil CO₂, CH₄ and N₂O fluxes across 1 topographical positions in tropical forests of the Guiana Shield
Courtois, Elodie A. (Universiteit Antwerpen. Departement Biologie)
Stahl, Clément (Universiteit Antwerpen. Departement Biologie)
Van den -Berge, Joke (Universiteit Antwerpen. Departement Biologie)
Bréchet, Laëtitia (Universiteit Antwerpen. Departement Biologie)
Van Langenhove, Leandro (Universiteit Antwerpen. Departement Biologie)
Richter, Andreas (Universität Wien. Institut für Mikrobiologie und Ecosystem Wissenschaf)
Urbina Barreto, Ifigenia (Centre de Recerca Ecològica i Aplicacions Forestals)
Soong, Jennifer L. (Universiteit Antwerpen. Departement Biologie)
Peñuelas, Josep (Centre de Recerca Ecològica i Aplicacions Forestals)
Janssens, Ivan A. (Universiteit Antwerpen. Departement Biologie)

Date: 2018
Abstract: The spatial variation of soil greenhouse gas fluxes (GHG; carbon dioxide—CO₂, methane—CH₄ and nitrous oxide—N₂O) remains poorly understood in highly complex ecosystems such as tropical forests. We used 240 individual flux measurements of these three GHGs from different soil types, at three topographical positions and in two extreme hydric conditions in the tropical forests of the Guiana Shield (French Guiana, South America) to (1) test the effect of topographical positions on GHG fluxes and (2) identify the soil characteristics driving flux variation in these nutrient-poor tropical soils. Surprisingly, none of the three GHG flux rates differed with topographical position. CO₂ effluxes covaried with soil pH, soil water content (SWC), available nitrogen and total phosphorus. The CH4 fluxes were best explained by variation in SWC, with soils acting as a sink under drier conditions and as a source under wetter conditions. Unexpectedly, our study areas were generally sinks for N₂O and N₂O fluxes were partly explained by total phosphorus and available nitrogen concentrations. This first study describing the spatial variation of soil fluxes of the three main GHGs measured simultaneously in forests of the Guiana Shield lays the foundation for specific studies of the processes underlying the observed patterns.
Note: Número d'acord de subvenció EC/FP7/610028
Rights: Tots els drets reservats
Language: Anglès
Document: article ; recerca ; acceptedVersion
Published in: Ecosystems, First online 28 February 2018, ISSN 1432-9840

DOI: 10.1007/s10021-018-0232-6


Available from: 2019-12-30
Post-print

The record appears in these collections:
Research literature > UAB research groups literature > Research Centres and Groups (scientific output) > Experimental sciences > CREAF (Centre de Recerca Ecològica i d'Aplicacions Forestals) > Imbalance-P
Articles > Research articles
Articles > Published articles

 Record created 2018-04-25, last modified 2018-07-28



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