Fungal composition associated with host tree identity mediates nutrient addition effects on wood microbial respiration
Hu, Zhenhong (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Fernández-Martínez, Marcos (Centre de Recerca Ecològica i d'Aplicacions Forestals)
He, Qinsi (Northwest A&F University. College of Soil and Water Conservation Science and Engineering)
Xu, Zhiyuan (Northwest A&F University. College of Soil and Water Conservation Science and Engineering)
Jiang, Lin (Georgia Institute of Technology. School of Biological Sciences)
Zhou, Guiyao (Instituto de Recursos Naturales y Agrobiología de Sevilla)
Chen, Ji (Chinese Academy of Sciences. Institute of Earth Environment)
Nie, Ming (Fudan University. School of Life Sciences)
Yu, Qiang (Northwest A&F University. College of Soil and Water Conservation Science and Engineering)
Feng, Hao (Northwest A&F University. College of Soil and Water Conservation Science and Engineering)
Huang, Zhiqun (Fujian Normal University. School of Geographical Science)
Michaletz, Sean T. (University of British Columbia. Department of Botany and Biodiversity Research Centre)

Data:	2024
Resum:	Fungi are key decomposers of deadwood, but the impact of anthropogenic changes in nutrients and temperature on fungal community and its consequences for wood microbial respiration are not well understood. Here, we examined how nitrogen and phosphorus additions (field experiment) and warming (laboratory experiment) together influence fungal composition and microbial respiration from decomposing wood of angiosperms and gymnosperms in a subtropical forest. Nutrient additions significantly increased wood microbial respiration via fungal composition, but effects varied with nutrient types and taxonomic groups. Specifically, phosphorus addition significantly increased wood microbial respiration (65%) through decreased acid phosphatase activity and increased abundance of fast-decaying fungi (e. g. , white rot), while nitrogen addition marginally increased it (30%). Phosphorus addition caused a greater increase in microbial respiration in gymnosperms than in angiosperms (83. 3% vs. 46. 9%), which was associated with an increase in Basidiomycota:Ascomycota operational taxonomic unit abundance in gymnosperms but a decrease in angiosperms. The temperature dependencies of microbial respiration were remarkably constant across nutrient levels, consistent with metabolic scaling theory hypotheses. This is because there was no significant interaction between temperature and wood phosphorus availability or fungal composition, or the interaction among the three factors. Our results highlight the key role of tree identity in regulating nutrient response of wood microbial respiration through controlling fungal composition. Given that the range of angiosperm species may expand under climate warming and forest management, our data suggest that expansion will decrease nutrient effects on forest carbon cycling in forests previously dominated by gymnosperm species.
Ajuts:	European Commission 101076740 Agència de Gestió d'Ajuts Universitaris i de Recerca 2022/BP-00059
Nota:	Altres ajuts: Ayudas de Excelencia RYC-MAX 2023
Drets:	Aquest material està protegit per drets d'autor i/o drets afins. Podeu utilitzar aquest material en funció del que permet la legislació de drets d'autor i drets afins d'aplicació al vostre cas. Per a d'altres usos heu d'obtenir permís del(s) titular(s) de drets.
Llengua:	Anglès
Document:	Article ; recerca ; Versió acceptada per publicar
Matèria:	Carbon cycle ; Metabolic scaling theory ; Nutrient limitation ; Phosphorus and nitrogen ; Temperature sensitivity ; Tree species ; Wood decomposition
Publicat a:	Ecology, (June 2024) , art. e4375, ISSN 1939-9170

DOI: 10.1002/ecy.4375

Postprint. Material suplementari

Postprint. Article

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