干旱区生态环境知识资源中心(Arid): Structural and functional responses of bacterial and fungal communities to multiple heavy metal exposure in arid loess

Arid

DOI	10.1016/j.scitotenv.2020.138081
	Structural and functional responses of bacterial and fungal communities to multiple heavy metal exposure in arid loess
	Zeng, Xiao-Ying; Li, Shi-Weng; Leng, Yan; Kang, Xiao-Hu
通讯作者	Li, SW
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
ISSN	0048-9697
EISSN	1879-1026
出版年	2020
卷号	723
英文摘要	Concentration gradients of multiple heavy metals (HMs) in the arid loess region near a smelter were determined. In order to understand the response of soil microbes to multiple HM gradients, bacterial and fungal community structures and functions were analyzed using high-throughput RNA gene sequencing and the PICRUSt method. RDA/PCA analyses revealed that soil pH, HMs, and electrical conductivity (EC) jointly affected the bacterial communities in the soils. The soil microbial community structures responded differently to HMs, EC, and pH. High HMs increased the abundances of the bacterial phyla Actinobacteria, Bacteroidetes, Deinococcus-Thermus, and Chloroflexi, and the genera Blastococcus, Rubrobacter, Quadrisphaera, and Tunicatimonas, whereas they decreased the abundances of the phyla Proteobacteria and Acidobacteria and the genera Streptomyces and Nocardioides. High EC and low pH decreased the abundance of most of the dominant bacterial phyla but increased the abundances of Firmicutes, Deinococcus-Thermus, and Nitrospirae. Furthermore, high HMs and EC reduced the numbers of soil-specific bacterial and fungal groups and drove the succession of certain groups that were highly resistant to increased HMs and EC. In addition, many bacterial and fungal groups exhibited different response patterns to each HM, implying that, in multiple HM-contaminated soils, HMs jointly shaped the microbial communities. PICRUSt analysis suggested that high HMs significantly decreased the total gene abundance and most KEGG modules in the soils. High EC and low pH significantly enhanced the abundances of several two-component system-, electron transfer-, and methanogenesis-related modules. We conclude that excessive multiple HMs and EC principally repressed the microbial activity and severely drove the gradient succession of bacterial and fungal communities in the arid loess region. (C) 2020 Elsevier B.V. All rights reserved.
英文关键词	Loess Bacterial community Fungal community Heavy metals Bacterial community function
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000535897200017
WOS关键词	LONG-TERM ; MICROBIAL COMMUNITY ; SOIL ; DIVERSITY ; POLLUTION ; ECOSYSTEMS ; MERCURY ; SYSTEMS ; BAIYIN ; RISK
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/2XILL650/324549
作者单位	[Zeng, Xiao-Ying; Li, Shi-Weng; Leng, Yan; Kang, Xiao-Hu] Lanzhou Jiaotong Univ, Sch Chem & Biol Engn, Sch Environm & Municipal Engn, Key Lab Extreme Environm Microbial Resources & En, Lanzhou 730070, Peoples R China
推荐引用方式 GB/T 7714	Zeng, Xiao-Ying,Li, Shi-Weng,Leng, Yan,et al. Structural and functional responses of bacterial and fungal communities to multiple heavy metal exposure in arid loess[J],2020,723.
APA	Zeng, Xiao-Ying,Li, Shi-Weng,Leng, Yan,&Kang, Xiao-Hu.(2020).Structural and functional responses of bacterial and fungal communities to multiple heavy metal exposure in arid loess.SCIENCE OF THE TOTAL ENVIRONMENT,723.
MLA	Zeng, Xiao-Ying,et al."Structural and functional responses of bacterial and fungal communities to multiple heavy metal exposure in arid loess".SCIENCE OF THE TOTAL ENVIRONMENT 723(2020).