San Juan Islands Salmonid Limiting Factors & Recommended Actions - Eight Basin report Cascade Creek December 2017, Byron Rot Byron Rot San Juan County Public Works – Environmental Resources
[email protected] June 27, 2019 Technical Team/Co-authors Russel Barsh – KWIAHT Michael Boyd – Western Washington University Spatial Institute Jenny De Groot – Speckled Trout Consulting Kyle Dodd – San Juan County Health and Human Services Jamie Glasgow – Wild Fish Conservancy Judy Meyer – San Juan County Salmon Technical Advisory Group Mike Ramsey – San Juan Islands Conservation District Marcus Reaves – Washington Department of Fish and Wildlife Kimbal Sundberg - San Juan County Salmon Technical Advisory Group Tyson Waldo - Western Washington University Spatial Institute 2 Foreword There is a misconception in the San Juan Islands that our watersheds do not contain salmonids. San Juan Islands streams do contain salmonid fish; mainly cutthroat (resident and presumably anadromous), and in a few watersheds coho and chum (Barsh 2010, Glasgow et al. 2016, DeGroot 2018). There are many accounts of old- timers fishing in our creeks. However, past settlement and agriculture using older ideas for managing water have resulted in the degradation of our natural stream systems, especially with diversions, channelization, and the building of in-channel ponds. Watersheds that used to flow mostly perennially are now seasonal; watersheds that historically had salmonids may no longer contain native fish. In addition, we are in the midst of a human-caused warming climate. For freshwater ecosystems in the Puget Sound region, we will see increased fall-winter flows and decreased summer flows (CIG 2015), making salmonid recovery more difficult in our small watersheds.