On Wednesday, February 18, 2026, Dr. Tom Ginn will present a review of the ecological relationships among important aquatic species in the Verde River. For example, he will discuss the importance of variable flow relationships to native fish species. He will also discuss the limiting factors for native fishes, including the negative effects of introduced species. An overview of fishing opportunities in the Verde River and tributaries will also be included. Finally, he will discuss various restoration projects that have been implemented in the Verde River system, including invasive species controls and riparian habitat improvements.
Dr. Ginn is a retired water quality scientist and environmental pollution specialist with a 50-year career working on major pollution sites throughout the U.S. He has served as an expert witness in major environmental lawsuits including wastewater treatment options for San Diego, PCB remediation in the Hudson River, PFAS sources in the Mississippi River, and metals pollution at many mining and smelting sites in the western states. In Sedona, Dr. Ginn is active in the OLLI Program at Yavapai College (Osher Lifelong Learning Institute) where he has taught many workshops and courses on a wide range of environmental issues.
The event will take place at the KSB EcoHub, located at 360 Brewer Road in Sedona, starting at 5:00 p.m. Doors open at 4:30, and the event is free and open to the public.