Limiting Resources Define the Global Pattern of Soil Microbial Carbon Use Efficiency
Cui, Yongxing (Freie Universität Berlin)
Hu, Junxi (Sichuan Agricultural University)
Peng, Shushi (Peking University)
Delgado-Baquerizo, Manuel (Instituto de Recursos Naturales y Agrobiología)
Moorhead, Daryl L. (University of Toledo)
Sinsabaugh, Robert L. (University of New Mexico)
Xu, Xiaofeng (San Diego State University)
Geyer, Kevin M. (Young Harris College)
Fang, Linchuan (Wuhan University of Technology)
Smith, Pere (University of Aberdeen)
Peñuelas, Josep (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Kuzyakov, Yakov (University of Goettingen)
Chen, Ji (Aarhus University)

Data:	2024
Resum:	Microbial carbon (C) use efficiency (CUE) delineates the proportion of organic C used by microorganisms for anabolism and ultimately influences the amount of C sequestered in soils. However, the key factors controlling CUE remain enigmatic, leading to considerable uncertainty in understanding soil C retention and predicting its responses to global change factors. Here, we investigate the global patterns of CUE estimate by stoichiometric modeling in surface soils of natural ecosystems, and examine its associations with temperature, precipitation, plant-derived C and soil nutrient availability. We found that CUE is determined by the most limiting resource among these four basic environmental resources within specific climate zones (i. e. , tropical, temperate, arid, and cold zones). Higher CUE is common in arid and cold zones and corresponds to limitations in temperature, water, and plant-derived C input, while lower CUE is observed in tropical and temperate zones with widespread limitation of nutrients (e. g. , nitrogen or phosphorus) in soil. The contrasting resource limitations among climate zones led to an apparent increase in CUE with increasing latitude. The resource-specific dependence of CUE implies that soils in high latitudes with arid and cold environments may retain less organic C in the future, as warming and increased precipitation can reduce CUE. In contrast, oligotrophic soils in low latitudes may increase organic C retention, as CUE could be increased with concurrent anthropogenic nutrient inputs. The findings underscore the importance of resource limitations for CUE and suggest asymmetric responses of organic C retention in soils across latitudes to global change factors.
Ajuts:	Agencia Estatal de Investigación TED2021-132627B-I00 Agencia Estatal de Investigación PID2022-140808NB-I00
Drets:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Llengua:	Anglès
Document:	Article ; recerca ; Versió publicada
Publicat a:	Advanced science, Vol 11, Issue 35 (Setember 2024) , art. 2308176, ISSN 2198-3844

DOI: 10.1002/advs.202308176
PMID: 39024521

11 p, 14.0 MB

El registre apareix a les col·leccions:
Documents de recerca > Documents dels grups de recerca de la UAB > Centres i grups de recerca (producció científica) > Ciències > CREAF (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Articles > Articles de recerca
Articles > Articles publicats