School of Ecology and Nature Conservation, Beijing Forestry University, Beijing, 100083, China.
Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China.
Environ Microbiol. 2021 May;23(5):2499-2508. doi: 10.1111/1462-2920.15466. Epub 2021 Mar 26.
Inland river basins include critical habitats and provide various ecosystem services in extremely arid lands. However, we know little about the distribution patterns of soil fungal communities in these river basins. We investigated the distribution patterns of soil fungal communities from the riparian oasis zone (ROZ) to the circumjacent desert zone (CDZ) at the lower reaches of the Heihe River. The results indicated that soil fungal communities were mainly dominated by the phyla Ascomycota and Basidiomycota across all samples. The dominant soil fungi taxa were significantly different between ROZ and CDZ habitats at both the phylum and genus levels. Fungal alpha diversity was mainly affected by spatial factors and plant functional traits, and Pearson correlation analysis revealed that fungal alpha diversity was more closely related to plant functional traits than soil properties. Furthermore, fungal community structure was best explained by spatial factors and plant attributes (including plant diversity and plant functional traits). Together, our findings provide new insights into the significance of spatial factors and plant attributes for predicting distributions of fungal communities in arid inland river basins, which will help us better understand the functions and services of these ecosystems.
内陆河流域包括关键生境，并为极度干旱地区提供各种生态系统服务。然而，我们对这些河流域土壤真菌群落的分布模式知之甚少。我们调查了黑河下游河岸绿洲带（ROZ）到周围沙漠带（CDZ）的土壤真菌群落的分布模式。结果表明，土壤真菌群落主要以子囊菌门和担子菌门为主，所有样本均如此。ROZ 和 CDZ 生境之间的优势土壤真菌类群在门和属水平上均存在显著差异。真菌的 alpha 多样性主要受空间因素和植物功能特征的影响，皮尔逊相关分析表明，真菌的 alpha 多样性与植物功能特征的关系比与土壤特性的关系更为密切。此外，真菌群落结构最好由空间因素和植物属性（包括植物多样性和植物功能特征）来解释。总之，我们的研究结果为预测干旱内陆河流域真菌群落的分布提供了新的见解，这将有助于我们更好地理解这些生态系统的功能和服务。
