2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
6/07/2017 | 9:30 AM - 9:45 AM | HYDROGEOMORPHIC ALTERATIONS IMPACT FISH ASSEMBLAGE STRUCTURE AND FUNCTION IN URBAN STREAMS | 302A
HYDROGEOMORPHIC ALTERATIONS IMPACT FISH ASSEMBLAGE STRUCTURE AND FUNCTION IN URBAN STREAMS
Urban development results in widespread geomorphic and hydrologic alterations of streams. Despite a developing literature regarding urban stream hydrogeomorphology, few studies have addressed the timing and spatial scale of urban-induced stream geomorphic adjustment on fish assemblages. Here, we investigated the relationships between annual changes in fluvial geomorphology and fish assemblages in 12 small streams in the Columbus Metropolitan Area (CMA), Ohio (USA) over 3-5 years. Multiple measures of stream geomorphology changed over time including slope (9% decrease on average), discharge rate (39% decrease), and shear stress (29% decrease), some in concert with one another (e.g., slope and shear stress). Repeated-measures ANOVA showed that a number of fish assemblage metrics were related to hydrogeomorphic variables, but the nature of these relationships often changed over time (e.g., linear to non-linear). Among the strongest relationships observed were associations between substrate size (D50) and species richness, slope and evenness, and width of flood-prone area and shear stress and H’ and % specialists (e.g., invertivores)). These results contribute to mechanisms regulating changes in resident fish communities in urbanizing catchments.
- C14 Hydroecology
- C02 Fish and Other Aquatic Vertebrates
- C08 Urban Ecology & C16 Restoration Ecology
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Presenters/Authors
Leslie O. Rieck
(), The Ohio State University, rieck.6@osu.edu;
ASHA DISCLOSURE:
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S. Mažeika Patricio Sulliván
(), The Ohio State University, sullivan.191@osu.edu;
ASHA DISCLOSURE:
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