This project seeks to 1) further define the klamath basin strontium isoscape (geographic delineation of naturally occurring strontium isotopes across the klamath basin) and 2) use this information…

This Project Grant award from the U.S. Department of the Interior Fish and Wildlife Service (CFDA 15.664 - Fish and Wildlife Coordination and Assistance) provides $300,000.00 to the University of California, Davis to: 1) further define the Klamath Basin strontium isoscape (geographic delineation of naturally occurring strontium isotopes) and 2) use this information to assess changes in life history diversity, production, and migratory pathways of fall-run Chinook salmon associated with dam removal, using adult otoliths collected annually during 2024-2026. The award leverages data previously collected over the prior 4 years (pre-dam removal) to support a robust study design. The information is critical to adaptively managing the Klamath Basin post-dam removal and has important implications for restoration of key tributaries.

This project seeks to 1) further define the klamath basin strontium isoscape (geographic delineation of naturally occurring strontium isotopes across the klamath basin) and 2) use this information to assess changes in life history diversity, production, and migratory pathways of fall-run chinook salmon associated with DAM removal, using adult otoliths collected annually during 2024-2026. The proposal leverages data already collected over the prior 4 years (pre-DAM removal) on the klamath river providing for a robust study design. The information is critical to adaptively managing the klamath basin, post DAM removal, and has important implications for restoration of key tributaries.