2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/26/2021 | 8:30 AM - 10:30 AM | THE USE OF PERIPHYTON AND BENTHIC MACROINVERTEBRATES TO ASSESS IMPAIRMENT IN TWO URBAN STREAMS IN SOUTHEAST MICHIGAN (USA) | Virtual Platform
THE USE OF PERIPHYTON AND BENTHIC MACROINVERTEBRATES TO ASSESS IMPAIRMENT IN TWO URBAN STREAMS IN SOUTHEAST MICHIGAN (USA)
Urbanization affects stream ecosystems by disrupting natural processes including hydrogeology, nutrient fluxes, and trophic dynamics. We seek to identify the role of riparian cover on periphyton biomass, and diversity of benthic macroinvertebrates at urban impaired stream sites in the Rouge and Huron rivers. Twelve stream sites were evaluated in recreational parks, near roads, and downstream of control sewer overflows. Measured parameters included riparian cover, chlorophyll-a and pheophytin from the biofilm, conductivity, and flow rate. Benthic macroinvertebrate communities were assessed, and indices including Ephemeroptera, Plecoptera, and Trichoptera (EPT), Hilsenhoff (HBI), Stream Quality (SQI), and diversity metrics were calculated. Preliminary results indicate differences in tolerant macroinvertebrate assemblages between urban streams based on riparian cover, and impairment level (SQI). Conductivity was negatively correlated with pheophytin, suggesting low herbivory and poor organic matter at sites with less riparian cover. Higher macroinvertebrate diversity was correlated with a higher density of riparian cover and lower chlorophyll-a. Park sites, despite being part of the urban streams assessed, were of higher quality and perhaps more resistant to disturbance impacts than other stretches of both streams in more developed areas.
- Urban streams
- Ecological dynamics
- Biological interactions
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Presenters/Authors
Héctor Esparra-Escalera
(), Wayne State University, hector.esparra@wayne.edu;
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Donna Kashian
(), Wayne State University, dkashian@wayne.edu;
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