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Toxicity and Enterobacteriaceae Profile in Water in Different Hydrological Events: a Case from South Brazil

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Abstract

Climatic changes have altered the water cycle, leading to more frequent occurrences of natural disasters, such as floods. In such events, quality of life is compromised due to environmental changes and widespread of pathogens. Unfortunately, scientific knowledge on bacteria behavior during different hydrological events is still scarce, and such knowledge is essential for the decision-making process regarding flood prevention and mitigation measures. Therefore, the present study aimed to investigate the changes in the enterobacteriaceae community and toxicity from river water samples collected during hydrological cycles over the rainy and dry seasons and on flood events. Additionally, a principal component analysis was performed to verify the relation between microbial and chemical profiles and the hydrological events. Results showed the presence of 153 enterobacteriaceae from 32 different species and of toxic substances on water samples collected during all hydrological events. During the rainy period, the Escherichia coli concentration increased along the river, and during flood events, the diversity of bacteria increased. However, bacterial diversity was not statistically associated with a specific hydrological event. These events can happen all around the world, and due to climatic changes associated with overpopulated unplanned areas, new flood-prone areas can appear rapidly, favoring the occurrence of waterborne outbreaks.

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Data Availability

The datasets used and/or analyzed during the current study are available from the corresponding author on reasonable request.

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Funding

Authors thank financial support of Brazilian National Council for Scientific and Technological Development (CNPq) process universal 404203/2016-7.

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Contributions

AV, GF, and WM: study idea and writing—original draft. TGF, EAM, and APM: laboratory tests. FMR: statistical analysis. MSM, NRWP, DMA, and DCFB: data discussion. All authors read and approved the manuscript.

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Correspondence to Aline Viancelli.

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The authors declare no competing interests.

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Fig. S1

Chemical characterization of water samples collected during hydrological events. (PNG 261 kb)

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Fonseca, T.G., Motta, E.A., Mass, A.P. et al. Toxicity and Enterobacteriaceae Profile in Water in Different Hydrological Events: a Case from South Brazil. Water Air Soil Pollut 232, 278 (2021). https://doi.org/10.1007/s11270-021-05208-x

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  • DOI: https://doi.org/10.1007/s11270-021-05208-x

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