期刊
SOIL BIOLOGY & BIOCHEMISTRY
卷 130, 期 -, 页码 113-121出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.soilbio.2018.12.008
关键词
Plant diversity; Bacterial and fungal communities; Sampling effect; High-throughput sequencing; Subtropical forests
类别
资金
- National Natural Science Foundation of China [31570447, 41601272]
- Hunan Provincial Natural Science Foundation of China [2017JJ3372]
- Science and Technology Plan Project of Hunan Province [2017SK2243]
- Huitong Forest Ecological Station - State Forestry Administration of the People's Republic of China
Plant interactions and feedbacks with soil microorganisms play an important role in sustaining the functions and stability of terrestrial ecosystems, yet the effects of tree species diversity on soil microbial community in forest ecosystems are still not well understood. Here, we examined the effects of tree species richness (1-12 species) and the presence of certain influential tree species (sampling effect) on soil bacterial and fungal communities in Chinese subtropical forests, using high-throughput Illumine sequencing for microbial identification. We observed that beta rather than alpha diversities of tree species and soil microorganisms were strong coupled. Multivariate regression and redundancy analyses revealed that the effects of tree species identity dominated over tree species richness on the diversity and composition of bacterial and fungal communities in both organic and top mineral soil horizons. Soil pH, nutrients and topography were always identified as significant predictors in the best multivariate models. Tree species have stronger effect on fungi than bacteria in organic soil, and on ectomycorrhizal fungi than saprotrophic fungi in mineral topsoil. Concluding, tree species identity, along with abiotic soil and topographical conditions, were more important factors determining the soil microbial communities in subtropical forests than tree diversity per se.
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