Profiling microbial communities in a watershed undergoing intensive anthropogenic activities

Liao, Hehuan1,2; Yu, Kai3; Duan, Yanhua3; Ning, Zigong1; Li, Binrui3; He, Leiyu1; Liu, Chongxuan1

2019-01-10

10.1016/j.scitotenv.2018.08.103

SCIENCE OF THE TOTAL ENVIRONMENT   影响因子和分区

0048-9697

1879-1026

In lotic ecosystems highly susceptible to anthropogenic activities, the influences of environmental variables on microbial communities and their functions remain poorly understood, despite our rapidly increasing sequencing ability. In this study, we profiled the microbial communities in the hyporheic sediments of a watershed undergoing intensive anthropogenic activities via next-generation sequencing of 16S rRNA V4-V5 hypervariable regions on Illumina MiSeq platform. Tidal impacts on microbial communities were investigated via co-occurrence networks. In addition, the influences of physicochemical variables including salinity, and the concentrations of nutrients, organic matter and heavy metals on the microbial communities were explored via canonical correspondence analyses. The sediment samples were collected from 19 sites covering the whole main river stem of the target watershed (n = 19; Maozhou river watershed, Shenzhen, China). The samples were subdivided in the field for microbiological analyses and measurements of physicochemical variables. The results indicated that core microbiome was associated with archaea methanogens and bacteria members from Proteobacteria, Chloroflexi, Bacteroidetes, Acidobacteria, Synergistetes and Firmicutes, among which, gram-negative and anaerobic bacteria genera contributing to the cycling of carbon, nitrogen and sulfur were predominant. Site-specific microbiomes were revealed that may serve as indicators of local environmental conditions (e.g., members affiliated to Oceanospirillales were abundant at sites with salt intrusion). Distinct microbial co-occurrence networks were identified for non-tidal, inter-tidal and tidal sites. Major environmental factors influencing microbial community composition included the concentrations of nitrate and bicarbonate in river water, pore water concentrations of sulfate, dissolved organic carbon and electrical conductivity, as well as manganese concentrations associated with the solid sediment. Collectively, the results of this study provide fundamental insights into the influence of environmental perturbations on microbial community composition in a lotic system, which may aid in the design of effective remediation and/or restoration strategies in the target watershed and beyond. (C) 2018 Elsevier B.V. All rights reserved.

Anthropogenic activities Hyporheic sediment Microbial community Watershed restoration

SCI ; EI

英语

第一 ; 通讯

Southern University of Science and Technology[G01296001]

Environmental Sciences & Ecology

Environmental Sciences

WOS:000447090400115

ELSEVIER SCIENCE BV

20183205677214

Bacteria ; Heavy metals ; Organic carbon ; Restoration ; Rivers ; RNA ; Sediments ; Stream flow ; Sulfur compounds

Waterways:407.2 ; Surface Water:444.1 ; Biological Materials and Tissue Engineering:461.2 ; Soil Mechanics and Foundations:483 ; Metallurgy and Metallography:531 ; Organic Compounds:804.1

ENVIRONMENT/ECOLOGY

Web of Science

1.Southern Univ Sci & Technol, Sch Environm Sci & Engn, Shenzhen 518055, Guangdong, Peoples R China
2.Nankai Univ, Coll Environm Sci & Engn, Tianjin 300350, Peoples R China
3.China Univ Geosci, Sch Environm Studies, Wuhan 430074, Hubei, Peoples R China

Liao, Hehuan,Yu, Kai,Duan, Yanhua,et al. Profiling microbial communities in a watershed undergoing intensive anthropogenic activities[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2019,647:1137-1147.

Liao, Hehuan.,Yu, Kai.,Duan, Yanhua.,Ning, Zigong.,Li, Binrui.,...&Liu, Chongxuan.(2019).Profiling microbial communities in a watershed undergoing intensive anthropogenic activities.SCIENCE OF THE TOTAL ENVIRONMENT,647,1137-1147.

Liao, Hehuan,et al."Profiling microbial communities in a watershed undergoing intensive anthropogenic activities".SCIENCE OF THE TOTAL ENVIRONMENT 647(2019):1137-1147.