Soil organic matter properties drive microbial enzyme activities and greenhouse gas fluxes along an elevational gradient

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dc.contributor.authorHan, Xingguo
dc.contributor.authorDomenech-Pascual, Anna
dc.contributor.authorCasas-Ruiz, Joan Pere
dc.contributor.authorDonhauser, Jonathan
dc.contributor.authorJordaan, Karen
dc.contributor.authorRamond, Jean-Baptiste
dc.contributor.authorPrieme, Anders
dc.contributor.authorRomani, Anna M.
dc.contributor.authorFrossard, Aline
dc.date.accessioned2025-01-20T16:10:51Z
dc.date.available2025-01-20T16:10:51Z
dc.date.issued2024
dc.description.abstractMountain ecosystems, contributing substantially to the global carbon (C) and nitrogen (N) biogeochemical cycles, are heavily impacted by global changes. Although soil respiration and microbial activities have been extensively studied at different elevation, little is known on the relationships between environmental drivers, microbial functions, and greenhouse gas fluxes (GHGs; carbon dioxide [CO2], methane [CH4] and nitrous oxide [N2O]) in soils of different elevation. Here, we measured how in situ GHG fluxes were linked to soil properties, soil organic matter (SOM) quantity and composition (the proportion of humic-like vs. protein-like OM), microbial biomass, enzyme activities and functional gene abundances in natural soils spanning an elevational gradient of similar to 2400 m in Switzerland. Soil CO2 fluxes did not significantly vary from low (lowland zone) to higher (montane and subalpine zones) elevation forests, but decreased significantly (P<0.001) from the treeline to the mountain summit. Multivariate analyses revealed that CO2 fluxes were controlled by C-acquiring enzymatic activities which were mainly controlled by air mean annual temperature (MAT) and SOM quantity and composition. CH4 fluxes were characterized by uptake of atmospheric CH4, but no trend was observed along the elevation. N2O fluxes were also dominated by uptake of atmospheric N2O. The flux rates remained stable with increasing elevation below the treeline, but decreased significantly (P<0.001) from the treeline to the summit. N2O fluxes were driven by specific nitrifying and denitrifying microbial genes (ammonia-oxidizing amoA and N2O-producing norB), which were again controlled by SOM quantity and composition. Our study indicates the treeline as a demarcation point changing the patterns of CO2 and N2O fluxes along the elevation, highlighting the importance of SOM quantity and composition in controlling microbial enzyme activities and GHG fluxes.
dc.fuente.origenWOS
dc.identifier.doi10.1016/j.geoderma.2024.116993
dc.identifier.eissn1872-6259
dc.identifier.issn0016-7061
dc.identifier.urihttps://doi.org/10.1016/j.geoderma.2024.116993
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/90234
dc.identifier.wosidWOS:001292127100001
dc.language.isoen
dc.revistaGeoderma
dc.rightsacceso restringido
dc.subjectGreenhouse gas fluxes
dc.subjectMountainous soils
dc.subjectElevational gradient
dc.subjectSOM quantity and composition
dc.subjectMicrobial enzyme activities and gene functions
dc.subject.ods14 Life Below Water
dc.subject.ods13 Climate Action
dc.subject.ods02 Zero Hunger
dc.subject.odspa14 Vida submarina
dc.subject.odspa13 Acción por el clima
dc.subject.odspa02 Hambre cero
dc.titleSoil organic matter properties drive microbial enzyme activities and greenhouse gas fluxes along an elevational gradient
dc.typeartículo
dc.volumen449
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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