Cheng Miaomiao, Song Jinge, Li Weikun, Zhao Yiming, Zhang Gaosen, Chen Yong, Gao Haining
College of Life Sciences and Engineering, Hexi University, Key Laboratory of the Hexi Corridor Resources Utilization of Gansu Zhangye China.
School of Life Sciences Lanzhou University Lanzhou China.
Ecol Evol. 2023 Nov 14;13(11):e10685. doi: 10.1002/ece3.10685. eCollection 2023 Nov.
The Qilian Mountains (QLMs) form an important ecological security barrier in western China and a priority area for biodiversity conservation. is a widespread species in the mid-high altitudes of the QLMs and has continuously migrated to higher altitudes in recent years. Understanding the effects of on microbial community characteristics is important for exploring future changes in soil biogeochemical processes in the QLMs. This study found that has profound effects on the community structure and ecological functions of soil microorganisms. The stability and complexity of the root zone microbial co-occurrence network were significantly higher than those of bare soils. There was a distinct altitudinal gradient in the effect of on soil microbial community characteristics. At an elevation of 3204 m, promoted the accumulation of carbon, nitrogen, and phosphorus and increased sucrase activity and soil C/N while significantly improving the community richness index of fungi ( < .05) compared with that of bacteria and the relative abundance of . The alpha diversity of fungi in the root zone soil of was also significantly increased at 3550 m altitude. Furthermore, the community similarity distance matrix of fungi showed an evident separation at 3204 m. However, at an altitude of 3750 m, mainly affected the bacterial community. increased the bacterial community richness. This is in agreement with the findings based on the functional prediction that favors the growth and enrichment of denitrifying communities at 3550 and 3750 m. The results provide a scientific basis for predicting the evolutionary trends of the effects of on soil microbial communities and functions and have important implications for ecological governance in the QLMs.
祁连山是中国西部重要的生态安全屏障和生物多样性保护重点区域。[物种名称]是祁连山中高海拔地区的广布物种，近年来不断向更高海拔迁移。了解[物种名称]对微生物群落特征的影响，对于探究祁连山未来土壤生物地球化学过程的变化具有重要意义。本研究发现，[物种名称]对土壤微生物的群落结构和生态功能具有深远影响。根际微生物共现网络的稳定性和复杂性显著高于裸土。[物种名称]对土壤微生物群落特征的影响存在明显的海拔梯度。在海拔3204米处，[物种名称]促进了碳、氮、磷的积累，提高了蔗糖酶活性和土壤碳氮比，同时与细菌相比显著提高了真菌的群落丰富度指数（P<0.05）以及[物种名称]的相对丰度。在海拔3550米处，[物种名称]根际土壤真菌的α多样性也显著增加。此外，真菌的群落相似性距离矩阵在3204米处呈现明显分离。然而，在海拔3750米处，[物种名称]主要影响细菌群落，增加了细菌群落丰富度。这与基于功能预测的结果一致，即在3550米和3750米处，[物种名称]有利于反硝化群落的生长和富集。研究结果为预测[物种名称]对土壤微生物群落和功能影响的演化趋势提供了科学依据，对祁连山的生态治理具有重要意义。
