Fungi and bacteria trade-off mediates drought-induced reduction in wood decomposition
Jia, Shuxian (East China Normal University. School of Ecological and Environmental Sciences)
Yuan, Tengfeng (East China Normal University. School of Ecological and Environmental Sciences)
Fu, Yuling (East China Normal University. School of Ecological and Environmental Sciences)
Peñuelas, Josep (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Zhou, Guiyao (Instituto de Recursos Naturales y Agrobiología de Sevilla - CSIC)
Zhou, Lingyan (Shanghai Engineering Research Center of Sustainable Plant Innovation)
Liu, Dingqin (East China Normal University. School of Ecological and Environmental Sciences)
He, Yanghui (Northeast Forestry University. Center for Ecological Research)
Liu, Ruiqiang (Northeast Forestry University. Center for Ecological Research)
Wang, Xinxin (East China Normal University. School of Ecological and Environmental Sciences)
Song, Bingqian (East China Normal University. School of Ecological and Environmental Sciences)
Jiang, Zheng (East China Normal University. School of Ecological and Environmental Sciences)
Zhou, Xuhui (East China Normal University. School of Ecological and Environmental Sciences)

Data:	2024
Resum:	Climate change has significantly increased the frequency and intensity of drought events in recent decades, which may affect the decomposition of organic matter such as deadwood. Previous studies have examined the impacts of microclimate and wood traits on deadwood decomposition, but how wood microbes regulate effects of drought intensity on deadwood decomposition remains unclear. In this study, a field drought experiment was conducted with three throughfall exclusion levels (i. e. , control, −35% and −70% rainfall treatments) in a subtropical forest to probe relative importance of microclimate, wood traits, and microbial biomass on wood decomposition. Our results showed that the −35% and −70% rainfall treatments significantly decreased wood CO2 efflux by 28. 27% and 47. 49%, respectively. Drought-induced decreases in wood CO2 efflux were mainly mediated by wood microbial biomass, particularly wood fungi biomass. The structural equation modelling indicated a shift in the dominant wood microbial communities in regulating wood CO2 efflux from bacteria to fungi as drought intensities increased. Our findings highlight the crucial role of wood microbial community with the trade-off between fungi and bacteria on deadwood decomposition under drought, which should be taken into account to decode forest carbon cycle − climate feedback in the future research.
Drets:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades.
Llengua:	Anglès
Document:	Article ; recerca ; Versió acceptada per publicar
Matèria:	Wood CO2 efflux ; Drought intensity ; Microbe ; Microclimate
Publicat a:	Catena, Vol. 243 (August 2024) , art. 108169, ISSN 1872-6887

DOI: 10.1016/j.catena.2024.108169

Disponible a partir de: 2026-08-31 Postprint

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