Etheostoma denoncourti
Overview
A detailed profile for this species is sourced from the IUCN Red List of Threatened Species as assessments become available.
Etheostoma denoncourti faces severe habitat degradation from agricultural runoff and urban development throughout its limited range in Tennessee River tributaries. Dam construction and water diversions have altered natural flow regimes essential for spawning, while sedimentation from land-use changes has degraded the clean gravel substrates this darter requires for reproduction. Climate change compounds these pressures by altering seasonal flow patterns and increasing water temperatures beyond the species' thermal tolerance.
Habitat
This darter inhabits clear, fast-flowing streams and small rivers with rocky or gravel substrates in the Tennessee River drainage system. It requires well-oxygenated waters with minimal siltation and prefers areas with riffles and runs where it can forage among the substrate for aquatic invertebrates.
