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Posted on: February 17, 2023

USFS: Tree Mortality Worsening

USDA Tree Mortality Image (JPG File)

US Forest Service Report Shows Tree Mortality is Worsening in Lake County

Lake County Leaders Engaged in Regional Advocacy Efforts to Fund Response

Lake County, CA (February 17, 2023) – This month, the United States Department of Agriculture’s (USDA) Forest Service released their 2022 Aerial Detection Survey Summary Report.  These annual surveys offer, “estimates of tree mortality and damage and depict broad mortality trends.”

Many residents will be aware the Lake County Board of Supervisors Proclaimed a “Local Emergency due to Pervasive Tree Mortality,” on May 3, 2022.  In ensuing months, Napa and Mendocino County likewise declared States of Emergency, recognizing what is a growing crisis in much of the State of California.

United States Forest Service (USFS) data depict truly troubling trends.  In 2019, USFS estimated 1,000 Lake County acres were affected by Tree Mortality.  The estimated number of dead trees was 3,000.  Those estimates have exponentially grown in the time since:

  • 2019 – 1,000 Acres, 3,000 dead trees
  • 2021 - 21,000 Acres, 331,000 dead trees
  • 2022 - 31,000 Acres, 590,000 dead trees

Lake County’s District 5 Supervisor, Jessica Pyska, has been a central figure in statewide and federal advocacy to address this emergency: “The US Forest Service’s report shows catastrophic Tree Mortality across most of Northern California,” observes Pyska.  “We have been hard at work on this problem in Lake County since 2021, and declared the first Tree Mortality Emergency back in May.  Since, we have developed coalition surrounding this topic with regional counties, and assisted Napa and Mendocino with their emergency declarations.”  

A 2022 windshield survey identified approximately 4,000 dead and dying trees near Lake County roadways and evacuation routes, alone.  Dr. Michael Jones, the University of California Cooperative Extension’s Forest Advisor for Lake County and a trained entomologist, indicates removal of dead and dying trees is critical to mitigating multi-species bark beetle infestation.  Costs for remediation of the highest priority areas, alone, are expected to exceed $12 million.  County officials and partners are heavily engaged in efforts to secure funding.

“We remain relentless in our project development to treat areas of high concern, and seeking funding from every available source,” continues Pyska.  “This report confirms everything we have been saying and should garner the attention and urgency that is needed.”

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