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 | THE EFFECT OF PHYSIOGRAPHIC REGIONS ON BENTHIC RIFFLE COMMUNITIES IN THE KOKOSING RIVER (OHIO) | Virtual Platform

THE EFFECT OF PHYSIOGRAPHIC REGIONS ON BENTHIC RIFFLE COMMUNITIES IN THE KOKOSING RIVER (OHIO)

Geology, physiographic history, and land use are among the most important factors influencing benthic community structure and distribution in lotic systems. During the Pleistocene Epoch, large sheets of ice altered much of the surface of Ohio by depositing large quantities of till across much of the state’s landscape while other areas were not impacted. The objective here was to examine whether glacial history impacted the quality of riffle habitats and associated benthic communities in a river in central Ohio. The Kokosing River transitions through several physiographic regions including the Till Plains, the Glaciated Allegheny Plateau, and the Unglaciated Allegheny Plateau. Periphyton, macroinvertebrates, fish, and selected physicochemical parameters were collected in riffle habitats at nine sites, traversing two of these regions (Till Plains and Glaciated Allegheny Plateau). Analyses indicated that specific conductance and pH were both higher in the Till Plains and could be a result of increased groundwater contributions from limestone aquifers prevalent in this region. Current analyses will document changes in the benthic community and further investigation next year will expand comparisons across a third physiographic region, the Unglaciated Allegheny Plateau.

Biological effects
Food webs
Landscape

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Presenters/Authors

Kourtney Craft (), Ohio Northern University , k-craft@onu.edu;