In Pasadena, a Scientist Will Discuss How Barriers Shape the Fate of Arroyo Seco’s Native Trout

The Arroyo Seco Foundation will host a public lecture on the streamflow conditions of the upper Arroyo Seco at 11 am on Saturday, January 17. The presentation will be held indoors at the Hahamongna Native Plant Nursery in Pasadena. 

The illustrated lecture will be presented by Matt Drenner, Ph D, Senior Fisheries Biologist with Stillwater Sciences. Dr. Drenner has extensively studied environmental conditions and habitats in the upper Arroyo Seco region of Greater Pasadena. 

The presentation, “Barrier Removals and Flows to Support Native Steelhead Trout in the Upper Arroyo Seco,” will focus on the impact of human-made streamflow barriers in the region, and their impact on aquatic life.

Brown Mountain Dam, in the upper Arroyo, is the largest of the human made streamflow barriers in the region, and the lecture will focus on its impact, and the impact of other barriers in the Arroyo Seco, on aquatic life, including the native trout that live in the Arroyo Seco stream. 

The presentation is free and will be held indoors at the Hahamongna Native Plant Nursery. Space is limited. Light refreshments will be offered. 

The Arroyo Seco Foundation is a century-old nonprofit organization based in Pasadena, and has collaborated with Stillwater Sciences on research of water conditions in the Arroyo Seco. The Foundation also operates the popular Hahamongna Native Plant Nursery, which is the venue for this presentation. 

Further information about the Arroyo Seco Foundation and the Hahamongna Nursery is available online at www.arroyosecofoundation.org and on their LinkedIn and Instagram pages. 

Hahamongna Nursery is open Saturdays from 9 am till 2 pm and is located within the Arroyo Seco watershed, in the northwest corner of Pasadena’s Hahamongna Watershed Park, at 4550 Oak Grove Drive, Pasadena.