Latest survey tallies more than 100 milion dead trees
California’s long-term drought has claimed another 36 million trees, the U.S. Forest Service said this week, announcing the results of a new aerial survey. Since 2010, more than 100 million trees have died across 7.7 million acres, the agency said.
The die-off intensified in 2016, after four years of drought, with mortality increasing 100 percent. Millions of additional trees are weakened and expected to die in the coming months and years. Forest Service leaders once again emphasized that their ability to address safety issues linked with dead trees has been severely hampered by climate change and limited resources.
Agriculture Secretary Tom Vilsack said a broken budget for the Forest Service sees an increasing amount of resources going to firefighting while less is invested in restoration and forest health.
“These dead and dying trees continue to elevate the risk of wildfire, complicate our efforts to respond safely and effectively to fires when they do occur, and pose a host of threats to life and property across California,” said Vilsack. “USDA has made restoration work and the removal of excess fuels a top priority, but until Congress passes a permanent fix to the fire budget, we can’t break this cycle of diverting funds away from restoration work to fight the immediate threat of the large unpredictable fires caused by the fuel buildups themselves.”
The majority of the 102 million dead trees are located in ten counties in the southern and central Sierra Nevada region. The Forest Service also identified increasing mortality in the northern part of the state, including Siskiyou, Modoc, Plumas and Lassen counties.
Five consecutive years of severe drought in California, a dramatic rise in bark beetle infestation and warmer temperatures are leading to these historic levels of tree die-off. As a result, in October 2015 California Governor Jerry Brown declared a state of emergency on the unprecedented tree die-off and formed a Tree Mortality Task Force to help mobilize additional resources for the safe removal of dead and dying trees.
This year, California had a record setting wildfire season, with the Blue Cut fire alone scorching over 30,000 acres and triggering the evacuation of 80,000 people. In the southeastern United States wildfires have burned more than 120,000 acres this fall. The southeast region of the Forest Service is operating at the highest preparedness level, PL 5, reflecting the high level of physical resources and funding devoted to the region. Extreme drought conditions persist, and many areas have not seen rain for as many as 95 days.
Longer, hotter fire seasons where extreme fire behavior has become the new norm, as well as increased development in forested areas, is dramatically driving up the cost of fighting fires and squeezing funding for the very efforts that would protect watersheds and restore forests to make them more resilient to fire. Last year fire management alone consumed 56 percent of the Forest Service’s budget and is anticipated to rise to 67 percent in by 2025.
As the situation in the southeast demonstrates, the problem of shrinking budget capacity is felt across the U.S., not only in the western states. The health of our forests and landscapes are at risk across the nation, and the tree mortality crisis could be better addressed if not for the increasing percentage of the Forest Service budget going to fight wildfire. “We must fund wildfire suppression like other natural disasters in the country,” says Vilsack.
Forest Service scientists expect to see continued elevated levels of tree mortality during 2017 in dense forest stands, stands impacted by root diseases or other stress agents and in areas with higher levels of bark beetle activity. Photos and video of the surveys are available on the Forest Service multimedia webpage.
Learn more about tree mortality and the work to restore forests in California at the Forest Service’s web page Our Changing Forests.