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    Influence of Wastewater Discharge on the Metabolic Potential of the Microbial Community in River Sediments

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    Type
    Article
    Authors
    Li, Dong
    Sharp, Jonathan O.
    Drewes, Jorg
    KAUST Department
    Biological and Environmental Sciences and Engineering (BESE) Division
    Water Desalination and Reuse Research Center (WDRC)
    Date
    2015-09-24
    Online Publication Date
    2015-09-24
    Print Publication Date
    2016-01
    Permanent link to this record
    http://hdl.handle.net/10754/594272
    
    Metadata
    Show full item record
    Abstract
    To reveal the variation of microbial community functions during water filtration process in river sediments, which has been utilized widely in natural water treatment systems, this study investigates the influence of municipal wastewater discharge to streams on the phylotype and metabolic potential of the microbiome in upstream and particularly various depths of downstream river sediments. Cluster analyses based on both microbial phylogenetic and functional data collectively revealed that shallow upstream sediments grouped with those from deeper subsurface downstream regions. These sediment samples were distinct from those found in shallow downstream sediments. Functional genes associated with carbohydrate, xenobiotic, and certain amino acid metabolisms were overrepresented in upstream and deep downstream samples. In contrast, the more immediate contact with wastewater discharge in shallow downstream samples resulted in an increase in the relative abundance of genes associated with nitrogen, sulfur, purine and pyrimidine metabolisms, as well as restriction–modification systems. More diverse bacterial phyla were associated with upstream and deep downstream sediments, mainly including Actinobacteria, Planctomycetes, and Firmicutes. In contrast, in shallow downstream sediments, genera affiliated with Betaproteobacteria and Gammaproteobacteria were enriched with putative functions that included ammonia and sulfur oxidation, polyphosphate accumulation, and methylotrophic bacteria. Collectively, these results highlight the enhanced capabilities of microbial communities residing in deeper stream sediments for the transformation of water contaminants and thus provide a foundation for better design of natural water treatment systems to further improve the removal of contaminants. © 2015, Springer Science+Business Media New York.
    Citation
    Li D, Sharp JO, Drewes JE (2015) Influence of Wastewater Discharge on the Metabolic Potential of the Microbial Community in River Sediments. Microbial Ecology 71: 78–86. Available: http://dx.doi.org/10.1007/s00248-015-0680-x.
    Publisher
    Springer Nature
    Journal
    Microbial Ecology
    DOI
    10.1007/s00248-015-0680-x
    PubMed ID
    26403720
    ae974a485f413a2113503eed53cd6c53
    10.1007/s00248-015-0680-x
    Scopus Count
    Collections
    Articles; Biological and Environmental Science and Engineering (BESE) Division; Water Desalination and Reuse Research Center (WDRC)

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