2023 Early Hearing Detection & Intervention Conference

March 5-7, 2023 • Cincinnati, OH

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5/20/2019 | 11:45 AM - 12:00 PM | A PROCESS-BASED FRAMEWORK FOR RESTORING THERMAL HETEROGENEITY IN REGULATED RIVERS | 151 ABC

A PROCESS-BASED FRAMEWORK FOR RESTORING THERMAL HETEROGENEITY IN REGULATED RIVERS

The thermal regimes of streams and rivers, and associated thermal heterogeneity, influence the growth and distribution of aquatic organisms and the functioning of aquatic ecosystems. Climate change and anthropogenic habitat alterations affect riverine thermal regimes. Process-based restoration focuses on physical and ecological processes that maintain and create resilient ecosystems. We develop a process-based framework for restoring thermal heterogeneity in regulated rivers and examine three main premises: (1) thermal heterogeneity is constrained by the thermal regime of the river, (2) ecosystem processes driving thermal heterogeneity depend on the characteristics of thermal regimes, and (3) system-wide modifications of thermal regimes (e.g., dams, urbanization) determine the scope of thermal restoration. In this framework, we evaluate current conditions of the thermal regime, prioritize areas for protection, and focus on restoring processes that create and maintain thermal heterogeneity in riverine landscapes. We explore the utility of this framework with case studies in medium- and large-sized regulated rivers in the Pacific Northwest (USA).

Restoration
Watershed
Water Quality

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Presenters/Authors

Francine Mejia (), U.S. Geological Survey, Forest and Rangeland Ecosystem Science Center, Cascadia Field Station, fmejia@usgs.gov;