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Impacts of Channel Morphodynamics on Fish Habitat Utilization
Parna Parsapour-Moghaddam1, Colin P Brennan2, Colin D Rennie2
1Department of Civil Engineering, University of Ottawa, 161 Louis Pasteur, Ottawa, ON, K1N 6N5, Canada. p.parsapour@uottawa.ca.
Environmental Management
|August 3, 2019
Summary
Stream morphology significantly impacts fish habitat. Juvenile yellow perch preferred depositional areas and avoided erosional zones in a cohesive meandering stream, influencing their distribution.
Area of Science:
- * Environmental Science
- * Ecology
- * Hydrology
Background:
- * Hydro-morphodynamic processes in fluvial systems are known to influence fish habitat availability.
- * The specific impacts of morphological changes on fish habitats, particularly in cohesive meandering streams, remain understudied.
- * Understanding these impacts is crucial for effective management of small fluvial systems.
Purpose of the Study:
- * To investigate the effects of morphological development in a cohesive meandering stream on fish habitat quality.
- * To assess habitat utilization by juvenile yellow perch (Perca flavescens) and white sucker (Catostomus commersonii).
- * To explore the relationship between hydro-morphodynamics, sediment transport, and fish distribution.
Main Methods:
- * Development and calibration of a three-dimensional (3D) morphodynamic model simulating hydro-morphodynamics.
- * Incorporation of morphodynamic model outputs into a fish habitat availability assessment.
- * Field validation using acoustic Doppler current profiler (ADCP) surveys, topographic measurements, and fish sampling.
Main Results:
- * The 3D hydro-morphodynamic model was successfully calibrated against field data.
- * Morphological stream development was identified as a significant factor influencing habitat utilization by juvenile yellow perch.
- * Juvenile yellow perch demonstrated a clear preference for depositional areas and avoidance of erosional zones.
Conclusions:
- * The study successfully linked stream morphological changes to fish habitat utilization patterns.
- * Sediment transport processes, specifically deposition and erosion, directly affect fish occurrence and distribution.
- * The proposed methodology offers valuable insights for managing fish habitats in small fluvial systems.
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