US Forest Service Research & Development
Contact Information
  • US Forest Service Research & Development
  • 1400 Independence Ave., SW
  • Washington, D.C. 20250-0003
  • 800-832-1355
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Andrew Gray

Andrew Gray

Research Ecologist, Team Leader
3200 SW Jefferson Way
United States

Phone: 541-750-7252
Contact Andrew Gray

Current Research

My research focuses on the application of forest inventory data. I am reconstructing changes in carbon through time by linking inventory and satellite data and am improving our ability to predict tree canopy cover using tree measurements. I also am studying the effects of management and environment on regional patterns of species richness, estimating the extent of regional wildlife habitat from inventory plots, and determining rates and patterns of land use change in Washington state.

Research Interests

Forest inventory data application, effects of disturbance and management on forest composition and structure, conditions and trends of Washington's forest resources.

Past Research

My past research has included investigations of long-term vegetation response to canopy gaps in mature conifer forests, applications of adaptive management studies in coastal Oregon, effects of fire and prescribed burning on regeneration and soil moisture in Sierran mixed conifer, and regional distribution and abundance of invasive species.

Why This Research is Important

My work is important because forest inventories provide an unbiased examination of forest conditions and trends across large regions and multiple ownerships. The proper collection, compilation, and analysis of inventory data provides a solid factual bedrock to inform policymakers and managers and supports additional modeling studies that evaluate the potential impacts of future changes in management and environment.


  • Oregon State University, Ph.D. Forest Ecology 1995
  • University of Washington, M.S. Forest Ecology 1990
  • University of Washington, B.S. Environmental Studies 1985

Professional Organizations

  • Ecological Society of America, Member (1990 - Current)

Featured Publications & Products


Research Highlights


Equations Used to Estimate Regional Tree Biomass and Carbon can be Improved

Developing nationally consistent methods for defining, measuring, and calculating biomass components will improve the reliability and applicatio ...


Forest and Agricultural Land Area Declines in Washington State While Residential and Urban Land Use Increases Over Past 30 years

Station scientists and partners assessed changes in land use and housing density across Washington state from 1976 to 2006. They found that the ...


Ground-based Estimates of Fire Severity Reveal Information Undetected by Satellite Imagery Analyses

A new study provides a broad-scale characterization of the extent of relatively low-severity fires and small fires, including prescribed fires, ...


Increasing Development Near Public Forest Lands in Washington and Oregon Has Implications for Public Land Management and Fire Suppression

Areas bordering public forest land in Washington and Oregon are showing substantial increases in development, with the number of structures on p ...


Net Forest Carbon in Oregon Increased Slightly During the Last Decade

Gains in forest carbon through tree growth and afforestation in the Pacific Northwest were offset by fire, insects, cutting, and deforestation.


Scientists analyze trends in tree growth to assess change in Interior Alaska’s spruce forest

Tree-ring analysis adjusted for age-related changes in growth indicate that recent growth of black and white spruce in Interior Alaska is near t ...


Scientists model four-state region to estimate carbon pools and flux over large domains

Variation in climate, disturbance regime, and forest management strongly influence terrestrial carbon sources and sinks.


Wetter, warmer conditions will likely favor biomass accumulation in Douglas-fir

Conversely, continued accumulation of forest biomass in drier regions may be more limited.


Working with Cal Fire to monitor carbon sequestration in California

Forest Service scientists partnered with California’s Department of Forestry and Fire Protection (Cal Fire) to develop a carbon inventory esse ...


Last updated on : 09/25/2020