摘要
Plant diversity significantly impacts ecosystem processes and functions,yet its influence on the community assembly of leaf fungi remains poorly understood.In this study,we investigated leaf epiphytic and endophytic fungal communities in a Chinese subtropical tree species richness experiment,ranging from 1 to 16 species,using amplicon sequencing to target the internal transcribed spacer 1 region of the rDNA.We found that the community assembly of epiphytic and endophytic fungi was predominantly governed by stochastic processes,with a higher contribution of dispersal limitation on epiphytic than on endophytic fungal communities but a higher contribution of selection on endophytic than on epiphytic fungal communities.The plant-epiphytic fungus interaction network was more complex(e.g.,more highly connected and strongly nested but less specialized and modularized)than the plant-endophytic fungus interaction network.Additionally,tree species richness was positively correlated with the network complexity and diversity of epiphytic(α-,β-andγ-diversity)and endophytic(β-andγ-diversity)fungi,but was not associated with the contribution of the stochastic and deterministic processes on the community assembly of epiphytic and endophytic fungi.This study highlights that tree species diversity enhances the diversity and network complexity,rather than alters the ecological processes in community assembly of leaf-associated fungi.
基金
supported by the Strategic Priority Research Program of the Chinese Academy of Sciences (XDB31030000)
the National Natural Science Foundation of China (31971496,32170120)
the support of Zhejiang Qianjiangyuan Forest Biodiversity National Observation and Research Station
the International Research Training Group Tree Dìjointly funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation, 319936945/GRK2324)
the University of Chinese Academy of Science(UCAS).
