2023 Early Hearing Detection & Intervention Conference

March 5-7, 2023 • Cincinnati, OH

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5/20/2019 | 3:00 PM - 3:15 PM | BASELINE ANALYSIS OF FRESHWATER LOTIC COMMUNITIES SURROUNDING A DECOMMISSIONED LOW HEAD DAM PRIOR TO REMOVAL | 251 DE

BASELINE ANALYSIS OF FRESHWATER LOTIC COMMUNITIES SURROUNDING A DECOMMISSIONED LOW HEAD DAM PRIOR TO REMOVAL

Low head dams can create a variety of problems for many freshwater lotic communities. We chose to study the Allentown Dam, in Lima, Ohio, which is commissioned for removal in summer of 2019. We designated two study sites, one above the dam and one below, as well as two reference sites, for comparison. Within each site, we sampled for macroinvertebrates, periphyton, and fish. We tested for community differences with ANOVAs, looking at abundance, taxa richness, diversity, density, and other factors. We also sampled for physicochemical data at each site, and compared the data at each specific site using a CCA (Canonical Correspondence Analysis). We observed that the two Allentown Dam sites are not different from each other in both their physicochemical properties and their community compositions. However, the two reference sites were significantly different from each other and the two study sites. Our results point to the idea that the low head dam is not having any localized impact on the loti benthic community, but is likely a barrier to fish movement upstream.

Dams
Fish
Invertebrate

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Presenters/Authors

Robert Verb (), Ohio Northern University, r-verb@onu.edu;