Plant diversity has stronger linkage with soil fungal diversity than with bacterial diversity across grasslands of northern China

作者：Congwen Wang, Linna Ma, Xiaoan Zuo, Xuehua Ye, Renzhong Wang, Zhenying Huang, Guofang Liu, Johannes H. C. Cornelissen · 发表于：Global Ecology and Biogeography · 年份：2022 · DOI：10.1111/geb.13462 · 被引用次数：123 · 研究领域：Mycorrhizal Fungi and Plant Interactions、Soil Carbon and Nitrogen Dynamics、Lichen and fungal ecology

Abstract Aim The interactions between plants and soil microbes play crucial roles in modulating the function and stability of terrestrial ecosystems. However, the relationships between plant and soil microbial diversity for different taxa have remained been elusive. Location Northern China. Major taxa Plant and soil microbes of grassland ecosystems. Time period 2018 and 2019. Methods We conducted a transect survey across grasslands to measure plant diversity, plant traits, and soil microbial diversity. High throughput sequencing was used to assess soil microbial diversity for bacterial 16S ribosomal RNA (16S) and fungal internal transcribed spacer (ITS) regions on an Illumina MiSeq. The random forest algorithm was used to determine the important spatial and environmental variables in predicting plant and microbial diversity, and structural equation modelling was used to examine the direct and indirect effects of climatic and edaphic variables on plant and microbial diversity. Results Plant diversity was positively correlated with the diversity of soil fungi, particularly for predicted arbuscular mycorrhizal fungi (AMF) and saprotrophic fungi, and they were positively related to soil nutrients and texture. However, the correlation between plant and bacterial diversity varied by phyla and functional guilds, resulting in decoupling between plant and soil bacterial diversity. Community weighted mean leaf C:N ratio indirectly decreased soil fungal diversity through a negative rela...