USDA Forest Service

Pacific Southwest Research Station

Pacific Southwest
Research Station

800 Buchanan Street
Albany, CA 94710-0011
(510) 883-8830
United States Department of Agriculture Forest Service. USDA logo which links to the department's national site. Forest Service logo which links to the agency's national site.


Understanding Forest Ecology: Fire, Water, and Bark Beetles

An estimated 129 million trees have died in California’s national forests since 2010. It’s important to look at how the ecosystem works, and how it's tied together, to help to understand why. Researchers discuss two things that help to influence forests: fire and water. The availability of water influences the size of trees, the density and the types of trees. Fire controls what’s going on in the understory—the future of the forest.

Length: 6:15

Posted: March 23, 2018


  • Malcolm North, PSW Research Ecologist
  • Martin Ritchie, PSW Research Forester
  • Connie Millar, PSW Research Ecologist
Last Modified: Apr 4, 2018 11:54:59 AM