Zuo Qinglin, Dang Keke, Yin Jing, Yuan Dandan, Lu Jing, Xiang Xingjia
School of Resources and Environmental Engineering, Anhui University, Hefei 230601, China.
Anhui Province Key Laboratory of Wetland Ecosystem Protection and Restoration, Hefei 230601, China.
J Fungi (Basel). 2024 Sep 27;10(10):673. doi: 10.3390/jof10100673.
Elevation gradients strongly influence the diversity pattern of soil microorganisms. To date, many studies have elucidated the response of soil microbes to changes in elevation gradients. However, the effects of these gradients on the assembly mechanisms and network complexity of rhizospheric microbial communities remain underexplored. To bridge this knowledge gap, this study assessed the response of rhizospheric fungal communities of along different elevation gradients in the Huangshan Mountain scenic area with regard to diversity, community composition, and assembly mechanisms using high-throughput amplicon sequencing. The results revealed significant differences in rhizospheric fungal community composition across three elevation gradients. The soil organic matter and pH were the most relevant factors influencing the changes in rhizospheric fungal community composition. The rhizospheric fungal diversity was significantly lower at both low and high elevations compared to the medium elevation. The rhizospheric fungal community assembly showed a more deterministic process at low and high elevations than at the medium elevation, indicating that stronger environmental filtering contributed to reduced fungal diversity at the extremes of the elevation gradient. In addition, rhizospheric pathogens, particularly Dermateaceae, acted as keystone taxa, diminishing the stability of co-occurrence networks at the medium elevation. This study contributes to a more comprehensive understanding of rhizospheric fungal community patterns and their ecological functions along elevation gradients in mountainous regions.
海拔梯度强烈影响土壤微生物的多样性格局。迄今为止，许多研究已经阐明了土壤微生物对海拔梯度变化的响应。然而，这些梯度对根际微生物群落的组装机制和网络复杂性的影响仍未得到充分探索。为了填补这一知识空白，本研究利用高通量扩增子测序技术，评估了黄山风景区不同海拔梯度下根际真菌群落的多样性、群落组成和组装机制。结果显示，三个海拔梯度下根际真菌群落组成存在显著差异。土壤有机质和pH值是影响根际真菌群落组成变化的最相关因素。与中等海拔相比，低海拔和高海拔处的根际真菌多样性显著较低。根际真菌群落组装在低海拔和高海拔处比在中等海拔处表现出更具确定性的过程，这表明更强的环境过滤作用导致了海拔梯度两端真菌多样性的降低。此外，根际病原菌，特别是皮伞科，作为关键类群，降低了中等海拔处共现网络的稳定性。本研究有助于更全面地了解山区根际真菌群落格局及其沿海拔梯度的生态功能。
