Saline Characteristics and Driving Factors of Bacterial Community Spatial Distribution in Qarhan Saline Soil Layer
[Objective]This study investigates the community structure of soil bacteria in high-salinity extreme environment and their special functions that enable adaption to such saline conditions.By utiliz-ing these specialized functions for microbial remediation of high-salinity ecological environments,this re-search aims to provide new insights into the mechanisms of microbial remediation in the salt desert and sandy land ecological environment in the cold and arid regions of Northwest China.[Method]This manuscript examined the bacterial community structure and the factors influencing them in the high-salinity soil of Qarhan.Utilizing the Omicsmart online analysis platform,the study analyzed the bacterial and archaea communities in the saline soil area around Qarhan Saline Lake by using 16S rRNA se-quences(V3+V4 region).A total of 63 soil profile samples underwent high-throughput sequencing to de-termine species abundance and distribution relative to established thresholds.Furthermore,this study in-vestigated the impact of high-salinity environmental factors on bacteria communities.[Result]The bac-terial community structure of the high-salinity soil in the Qarhan area comprised 33 phyla,108 classes,and 502 genera.At the phylum level,the dominant species were Firmicutes(62.71％),Proteobacteria(16.83％),and Actinobacteria(5.13％).[Conclusion]The community structure and its spatial distri-bution exhibited distinct zonation,stratification,and ring patterns.The primary driving factors for spe-cies richness were salinity,Cl-,Na+,Mg2+,which also showed certain relationship with moisture content and pH value.Changes in salinity and pH value were negatively correlated with variations in species abundance.Furthermore,salinity has a significant impact on both species abundance and community structure within the soil.
Qarhan Saline Lakehypersaline soil environmentbacterial community structureabundancedriving factors
万方数据
维普
