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

Autor: Xingguo Han, Anna Doménech-Pascual, Joan Pere Casas-Ruiz, Jonathan Donhauser, Karen Jordaan, Jean-Baptiste Ramond, Anders Priemé, Anna M. Romaní, Aline Frossard
Jazyk: angličtina
Rok vydání: 2024
Předmět:
Zdroj: Geoderma, Vol 449, Iss , Pp 116993- (2024)
Druh dokumentu: article
ISSN: 1872-6259
DOI: 10.1016/j.geoderma.2024.116993
Popis: Mountain 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 ∼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
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