title: Using in situ bacterial communities to monitor contaminants in river sediments.
abstract: Bacterial communities in sediments of human-impacted rivers are exposed to multiple anthropogenic contaminants and eventually lead to biodiversity lost and ecological functions disable. Nanfei River of Anhui province has been contaminated by pollutants from industrial and/or agricultural sources. This study was conducted to investigate the structure of in situ sediment bacterial communities in Nanfei River and to examine the correlation between the different taxonomic components and contaminant concentrations. The bacterial communities were dominated by Proteobacteria, Bacteroidetes and Chloroflexi. Both the profiles of environmental predictors and the composition of microbial communities differed among agriculture, industrial and confluence regions. There were significant associations between bacterial community phylogenies and the measured contaminants in the sediments. Nutrients (TN and TP) and two metals (Cd and Zn) were negatively correlated with the essential "core" of the bacterial interaction network (Betaproteobacteria and Deltaproteobacteria). Metals (Fe, Ni and Zn) and nutrients (TN and TP) had higher impact on bacterial community compositions than PAHs, OPs and PRTs according to the correlation and network analyses. Furthermore, several sensitive candidate genera were identified as potential bioindicators to monitor key contaminants by species contaminant correlation analysis. Overall, in situ bacterial communities could provide a useful tool for monitoring and assessing ecological stressors in freshwater sediments.
authors: State Key Laboratory of Pollution Control & Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, China.
authors: Yuwei
authors: Y
authors: Xie
authors: Laboratory for Nanomineralogy and Environmental Material, School of Resources and Environmental Engineering, Hefei University of Technology, Hefei, 230009, China.
authors: Jizhong
authors: J
authors: Wang
authors: Laboratory for Nanomineralogy and Environmental Material, School of Resources and Environmental Engineering, Hefei University of Technology, Hefei, 230009, China.
authors: Yaketon
authors: Y
authors: Wu
authors: Laboratory for Nanomineralogy and Environmental Material, School of Resources and Environmental Engineering, Hefei University of Technology, Hefei, 230009, China.
authors: Chen
authors: C
authors: Ren
authors: State Key Laboratory of Pollution Control & Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, China.
authors: Chao
authors: C
authors: Song
authors: State Key Laboratory of Pollution Control & Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, China.
authors: Jianghua
authors: J
authors: Yang
authors: State Key Laboratory of Pollution Control & Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, China.
authors: Hongxia
authors: H
authors: Yu
authors: State Key Laboratory of Pollution Control & Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, China; Department of Veterinary Biomedical Sciences and Toxicology Centre, University of Saskatchewan, Saskatoon, Saskatchewan, Canada; School of Biological Sciences, University of Hong Kong, Hong Kong Special Administrative Region; Department of Biology, Hong Kong Baptist University, Kowloon, Hong Kong Special Administrative Region.
authors: John P
authors: JP
authors: Giesy
authors: State Key Laboratory of Pollution Control & Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, China. Electronic address: howard50003250@yahoo.com.
authors: Xiaowei
authors: X
authors: Zhang
mesh_terms: D000383:Agriculture; D044822:Biodiversity; D002681:China / Q000453:epidemiology; D004784:Environmental Monitoring; D005618:Fresh Water / Q000382:microbiology*; D019015:Geologic Sediments / Q000737:chemistry / Q000382:microbiology*; D006801:Humans; D008670:Metals / Q000032:analysis; D019216:Metals, Heavy / Q000032:analysis; D045483:Rivers / Q000737:chemistry / Q000382:microbiology*; D012988:Soil Microbiology; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D008670:Metals; D019216:Metals, Heavy; D014874:Water Pollutants, Chemical
keywords: Metals; Next generation sequencing; Organophosphorous insecticides; PAHs; Pyrethroid insecticides