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Bacterial community composition and functional potential associated with a variety of urban stormwater sources

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Abstract

Pathogens and chemical contaminants in stormwater are major environmental and public health concerns. Characterizing the variability in composition and bioremediation functions of the microbial community from different sources of stormwater will help with efforts to properly manage water after it rains. To improve understanding of the variability and composition of the microbial community in run-off from different sources, we sampled stormwater over time from an outfall and receiving stream, along with run-off from different locations (rooftop, roadway) to identify microbial components associated with these urban waters. Community composition was variable in space and time for water samples from the same source. Even with this variability, we found taxonomic and functional groups differentially distributed in water samples collected during wet or dry weather or collected from different sources. The differentially distributed taxonomic and functional groups represent the unique characteristics of the source, such as when communities are exposed to iron in pipe material from the outfall or hydrocarbons flushed from various surfaces during rain events. Additionally, fecal indicator sequences from Clostridiales and Bacteroidales taxa made up a larger fraction of the microbial community from water collected under dry conditions. Our work characterizes the variability in microbial community composition and functions from a variety of urban water sources, with specific attention to communities from sources where water might be collected or treated with green infrastructure systems (e.g. rain gardens or biofilters). This will aid our understanding of the impact of human activities in urban environments on the surrounding water system.

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Data availability

Raw sequence reads have been submitted to the National Center for Biotechnology Information Sequence Read Archive under BioProject accession number PRJNA599168.

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Funding

This work was funded by the Chemical, Bioengineering, Environmental and Transport Systems Division of the National Science Foundation Grant (Award No. 511915). ANF was also supported by an Integrative Graduate Education and Research Traineeship (IGERT) fellowship from the National Science Foundation, Division of Graduate Education, grant award number 1069213. Part of this research project was conducted using computational resources at the Maryland Advanced Research Computing Center (MARCC).

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All authors contributed to the study conception, design, data analysis, and funding acquisition. Material preparation, data collection, and experimental methodology were conducted by Andrea Fraser. The first draft of the paper was written by Andrea Fraser and all authors edited subsequent versions of the manuscript. All authors read and approved the final manuscript.

Corresponding author

Correspondence to Sarah Pacocha Preheim.

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The authors have no relevant financial or non-financial interests to disclose

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Fraser, A.N., Preheim, S.P. Bacterial community composition and functional potential associated with a variety of urban stormwater sources. Urban Ecosyst 24, 1379–1390 (2021). https://doi.org/10.1007/s11252-021-01121-7

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  • DOI: https://doi.org/10.1007/s11252-021-01121-7

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