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Prevalence of Enterobacteriaceae and contaminants survey in sediments of the Atoyac River
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|Authors:||Aburto-Medina, Arturo; Ortiz, Irmene; Hernández, Ernesto|
|Author Affiliations:||Primary: |
Instituto Tecnológico y de Estudios Superiores de Monterrey, Puebla, Mexico
Universidad Autónoma Metropolitana-Cuajimalpa, Mexico
Universidad Nacional Autónoma de México, Mexico
|Volume Title:||Tecnología y Ciencias del Agua|
|Source:||Tecnología y Ciencias del Agua, 8(3), p.27-36. Publisher: Instituto Mexicano de Tecnologia del Agua, Jiutepec, Mexico. ISSN: 2007-2422|
|Note:||In English with Spanish summary. 42 refs.; illus., incl. 5 tables, sketch map|
|Summary:||We identified the bacterial community in sediments from the Atoyac River within Puebla, Mexico by a 16S rRNA gene clone library. The Enterobacteriaceae, specifically Shigella, Escherichia fergusonii and E. coli species dominate the bacterial community which is consistent with the values obtained for total coliforms. Genes encoding Shiga toxins (stx1 and stx2) were not found. Higher alkanes (C11-C16), esters, organic acids, phenols and phthalates, classified as potential endocrine disruptors were recovered from the sediments, while the presence of coprostanol indicated fecal pollution. Element concentrations were also determined in sediments and they decreased in the following sequence: Ca>Fe>K>Ti>Sr>Ba>Mn>Zr>Zn>Cu>Rb, while As, Mo and Pb were below the detection limit. All element values but Cu are below those permitted by the United States Environmental Protection Agency (USEPA). This study highlights the dominance of Enterobacteriaceae and the low bacterial diversity with the ability to degrade hydrocarbons or persistent organic pollutants (POPs) in sediments of the Atoyac River in an area prior to the water storage in the Avila Camacho (Valsequillo) dam whose waters are used for irrigation in lands above for several crops.|
|Subjects:||Agricultural waste; Aliphatic hydrocarbons; Alkanes; Chemical composition; Chemical oxygen demand; Coliform bacteria; Concentration; Detection; Detection limit; DNA; Ecology; Effluents; Escherichia; Esters; Genetics; Heavy metals; Hydrocarbons; Irrigation; Land use; Microorganisms; Nucleic acids; Organic compounds; Pathogens; Pollutants; Pollution; RNA; Sediments; Toxic materials; Waste disposal; Water pollution; Water quality; Water resources; Mexico; Puebla Mexico; Atoyac River basin; Bacteria; Enterobacteriaceae; Valsequillo Dam|
|Coordinates:||N190000 N190200 W0981300 W0981500|
|Copyright Information:||GeoRef, Copyright 2021 American Geosciences Institute.|
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