US Forest Service Research & Development
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  • US Forest Service Research & Development
  • 1400 Independence Ave., SW
  • Washington, D.C. 20250-0003
  • 800-832-1355
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Greg McPherson

E. Gregory McPherson

Emeritus Scientist
1731 Research Park
United States

Phone: 530-759-1723
Fax: 530-756-1409
Contact E. Gregory McPherson

Current Research

Dr. Greg McPherson is a Research Forester with the USDA Forest Service's Pacific Southwest Research Station located in Davis, CA, Greg grew up under a canopy of American elm trees in Howell, Michigan. Despite attempts to save the trees, all were lost to Dutch elm disease, and having felt the sting of that loss he became a green accountant, developing new methods and tools for quantifying the value of nature's benefits from city trees. He works with a team of scientists to measure and model effects of trees on energy use, urban heat islands, air pollutant uptake, carbon sequestration, and rainfall interception. Their research is helping justify investments in urban forest planning and management. In 2000, Greg received the International Society of Arboriculture's L.C. Chadwick Award for Research. Greg was a co-founder and Chair of the Tree Growth and Longevity Working Group and serves on the California Urban Forest Advisory Council. He attended University of Michigan (BGS), Utah State University (Masters in Landscape Architecture), and SUNY College of Environmental Science and Forestry (Ph.D. Forestry).

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Research Highlights


California ‘Street’ Tree Benefits Valued at $1 Billion

Forest Service researchers use a computerized tree inventory and management program to quantify the number and types of tree species lining Cali ...


Community Tree Guides Help Managers Show that Trees Pay Us Back

The 16th and final Community Tree Guide was published for Central Florida based on research conducted in Orlando. Providing complete coverage of ...


Database captures urban tree sizes, growth rates across U.S.

Sometimes in the cramped environs of U.S. cities every inch counts, especially if attempting to make space for nature. City planners and urban f ...


New Model Predicts Urban Tree Growth

New study developed growth equations for urban tree species throughout the United States


One Million Trees LA Canopy Cover Assessment

The day after Antonio Villaraigosa was elected mayor of the City of Los Angeles he planted a tree and announced his plan to plant one million tr ...


Trees in Los Angeles: Carbon Dioxide Sink or Source

Tree planting is considered to be among the most effective approaches to cooling urban environments and mitigating carbon dioxide emissions. The ...


Last updated on : 04/08/2021