2023 Early Hearing Detection & Intervention Conference

March 5-7, 2023 • Cincinnati, OH

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5/26/2021 | 8:30 AM - 10:30 AM | HIGH CONSERVATION VALUE OF THE ODONATA ASSEMBLAGE IN THE UPPER OHIO RIVER MAINSTEM: A LARGE, REGULATED RIVER IN NORTH AMERICA | Virtual Platform

HIGH CONSERVATION VALUE OF THE ODONATA ASSEMBLAGE IN THE UPPER OHIO RIVER MAINSTEM: A LARGE, REGULATED RIVER IN NORTH AMERICA

The contemporary Ohio River mainstem is a heavily modified riverine habitat comprised of various reservoir-dam series and shaped channels, rather than a free-flowing system. However, many odonate species in such degraded habitats have been shown to prosper due to key life history attributes. In this study, we characterize the assemblage of odonates in a section of the Ohio River mainstem and also tested hypotheses on distributions in the channel. Samples were acquired as bycatch to benthic fish sampling conducted using electrified benthic trawling. We found seven odonate species, all of which were known to be species of conservation concern in one or more U.S. states. We also concluded that gradients of bank distance and river depth only weakly predicted odonate abundance, suggesting that the Ohio River species regularly use mid- channel habitat that is several meters deep. Life histories of most of the species collected are typical of those living in large lotic, and occasionally lentic, environments. Despite the substantial differences between contemporary and historic conditions of habitats in the Ohio River basin, an odonate assemblage worth conserving continues to be present in the mainstem channel.

Urban
Habitat
Conservation

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Presenters/Authors

Ian Hart (), Chatham University, ian.hart167@gmail.com;