干旱区生态环境知识资源中心(Arid): Depth-dependent responses of soil bacterial communities to salinity in an arid region

Arid

DOI	10.1016/j.scitotenv.2024.175129
	Depth-dependent responses of soil bacterial communities to salinity in an arid region
	Dong, Xinping; Zhang, Zhihao; Lu, Yan; Li, Li; Du, Yi; Tariq, Akash; Gao, Yanju; Mu, Zhaobin; Zhu, Yuhe; Wang, Weiqi; Sardans, Jordi; Penuelas, Josep; Zeng, Fanjiang
通讯作者	Lu, Y ; Zeng, FJ
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
ISSN	0048-9697
EISSN	1879-1026
出版年	2024
卷号	949
英文摘要	Soil salinization adversely affects soil fertility and plant growth in arid region worldwide. However, as the drivers of nutrient cycling, the response of microbial communities to soil salinization is poorly understood. This study characterized bacterial communities in different soil layers along a natural salinity gradient in the Karayulgun River Basin, located northwest of the Taklimakan desert in China, using the 16S rRNA Miseq-sequencing technique. The results revealed a significant filtering effect of salinity on the bacterial community in the topsoil. Only the alpha-diversity (Shannon index) in the topsoil (0-10 cm) significantly decreased with increasing salinity levels, and community dissimilarity in the topsoil was enhanced with increasing salinity, while there was no significant relationship in the subsoil. BugBase predictions revealed that aerobic, facultatively anaerobic, gram-positive, and stress-tolerant bacterial phenotypes in the topsoil was negatively related to salinity. The average degree and number of modules of the bacterial co-occurrence network in the topsoil were lower under higher salinity levels, which contrasted with the trends in the subsoil, suggesting an unstable bacterial network in the topsoil caused by higher salinity. The average path length among bacterial species increased in both soil layers under high salinity conditions. Plant diversity and available nitrogen were the main drivers affecting community composition in the topsoil, while available potassium largely shaped community composition in the subsoil. This study provides solid evidence that bacterial communities adapt to salinity through the adjustment of microbial composition based on soil depth. This information will contribute to the sustainable management of drylands and improved predictions and responses to changes in ecosystems caused by climate change.
英文关键词	Desert ecosystem Microbial phenotype Soil salinity Microbial co-occurrence network
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001288666900001
WOS关键词	MICROBIAL COMMUNITIES ; POTASSIUM ; DIVERSITY ; NUTRIENT ; GROWTH
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/405533
推荐引用方式 GB/T 7714	Dong, Xinping,Zhang, Zhihao,Lu, Yan,et al. Depth-dependent responses of soil bacterial communities to salinity in an arid region[J],2024,949.
APA	Dong, Xinping.,Zhang, Zhihao.,Lu, Yan.,Li, Li.,Du, Yi.,...&Zeng, Fanjiang.(2024).Depth-dependent responses of soil bacterial communities to salinity in an arid region.SCIENCE OF THE TOTAL ENVIRONMENT,949.
MLA	Dong, Xinping,et al."Depth-dependent responses of soil bacterial communities to salinity in an arid region".SCIENCE OF THE TOTAL ENVIRONMENT 949(2024).