2023 Early Hearing Detection & Intervention Conference

March 5-7, 2023 • Cincinnati, OH

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6/06/2017 | 9:45 AM - 10:00 AM | BENTHIC MICROBIAL COMMUNITY COMPOSITION AND ACTIVITY IN URBAN STREAMS WITH VARIED PHARMACEUTCIAL CONCENTRATIONS | 305B

BENTHIC MICROBIAL COMMUNITY COMPOSITION AND ACTIVITY IN URBAN STREAMS WITH VARIED PHARMACEUTCIAL CONCENTRATIONS

Urban streams contain a wide variety of anthropogenic contaminants, including industrial chemicals, pesticides, pharmaceuticals, and personal care products. Many of these contaminants interact with aquatic organisms and can significantly affect the ecology and function of freshwater ecosystems. To explore the relationship between anthropogenic contaminants and the function and structure of benthic microbial communities, we measured a suite of 15 pharmaceutical residues (using polar organic chemical integrative samplers) and compared the occurrence of these chemicals to the activity (respiration rates) and composition (assessed via high-throughput amplicon sequencing) of bacterial communities from three streams along a gradient of suburban to urban land use in Baltimore, MD. These sites span a range of nutrient concentrations and inputs of untreated human sewage from leaking infrastructure. We detected seven pharmaceuticals, with the highest concentrations occurring at the most urban site. Sediment bacterial abundance was similar at all sites, but the highest respiration rates and the lowest bacterial diversity were found at the most urban site. Metagenomic sequencing is also being used to assess differences in the relative abundance of key functional genes across the sites.

C04 Microbial Ecology
C08 Urban Ecology
S03 Stressing the 'Eco' in Freshwater Ecotoxicology

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Presenters/Authors

John Kelly (), Loyola University Chicago, Jkelly7@luc.edu;