Abstract
Human activities such as agriculture and mining are leading causes of water pollution worldwide. Individual contaminants are known to negatively affect microbial communities. However, the effect of multifaceted pollution on these communities is less well understood. We investigated, using next-generation sequencing of the 16S rRNA genes, the effects of multisource (i.e., fertilizer industry and mining) chronic pollution on bacterial and archaeal communities in water and sediments from the Olifants River catchment, South Africa. Water samples showed less microbial species diversity than sediments and both habitats displayed different microbial communities. Within each of these habitats, pollution had no effect on alpha diversity but shaped the microbial composition and taxonomy-based predicted functions. Certain prokaryotic taxa and functional groups were indicative of different degrees of pollution. Heterotrophic taxa (e.g., Flavobacterium sp.) and sulphur-oxidizing bacteria (i.e., Thiobacillus sp.) were indicators of pollution in water and sediments, respectively. Ultimately, this information could be used to develop microbial indicators of water quality degradation.
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Funding for this research was provided by the National Research Foundation and SANPARKS, South Africa. We are grateful to the soil chemistry laboratory at the University of Pretoria for performing the chemical analysis, and SANPARKS for facilitating the collection of the samples.
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Communicated by Erko stackebrandt.
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Valverde, A., Cason, E.D., Gómez-Arias, A. et al. Pollution shapes the microbial communities in river water and sediments from the Olifants River catchment, South Africa. Arch Microbiol 203, 295–303 (2021). https://doi.org/10.1007/s00203-020-02035-2
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DOI: https://doi.org/10.1007/s00203-020-02035-2