This site is dedicated to providing updates on the increased tree mortality seen across the Bay Area in recent months. Please continue to check back for new resources.
- Answers to Frequently Asked Questions
- Example photos below, with many more on the Photos & Videos page
- Maps, information on related science and fire prevention, and more in links further down this page
- View Grant Opportunities
- Submit reports of dead trees via Mortalitree
Maps
East Bay Regional Park District map of the extent of dieback areas in the East Bay (April 2021) Download: Mapped Dieback Areas [PDF]
Scientific Information
Fungi
- Investigation of recent manzanita and knobcone pine dieback and mortality on Mount Diablo by Tedmund J. Swiecki and Elizabth Bernhardt, Phytosphere Research, October 2022
- Investigating the fungi responsible for the recent large-scale dieback of Blue Gum Eucalyptus (Eucalyptus globolus) in the San Francisco Bay Area by Matteo Garbelotto, U.C. Berkeley, September 2021 (These findings do not necessarily represent the views of the funders or the California Oak Mortality Task Force)
- Botryosphaeriaceae and Diaporthaceae in California Forest Environments by Chris Lee, CAL FIRE, August 2021
- An investigation into the causes of recent widespread Acacia spp. mortality in the San Francisco Bay Area by Matteo Garbelotto, UC Berkeley.
- UC IPM Pest Notes: Botryosphaeria Canker, by AJ Downer, Vega Dee, and T Michailides, 2022. UC ANR Publication 74177.
Fire Prevention
See CalFire’s Ready for Wildfire website for helpful information
Tree Care
Watering Mature Landscape Trees (YouTube video)
Contact us
Questions and comments can be sent to bayareatreemortality@gmail.com.
 | Aerial view of dead and dying eucalyptus on East Bay Regional Park District lands. December 2020. Credit: EBRPD |
 | Dead blackwood Acacias along Mountain Blvd in Oakland. November 2020. Credit: US FS PSW |
 | Diseased manzanita (Arctostaphylos), gray pine (Pinus sabiniana) and knobcone pine (Pinus attenuata) at Mt Diablo, Contra Costa County in March 2021. Credit: Chris Lee, CALFIRE |
