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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Eileen H. Helmer

Research Ecologist
USDA FS - RMRS, 240 West Prospect Road
Fort Collins
United States

Phone: 970-498-2644
Fax: 970-498-1212
Contact Eileen H. Helmer

Current Research

  • Tree successional dynamics and diversity across landscapes reforesting after large-scale clearing
  • Remote sensing of tropical forests
  • Interactions among the drivers of tropical forest productivity and species composition

Research Interests

  • USDA Forest Service Forest Inventory and Analysis Program in the Caribbean
  • Forest inventory to study the dynamics and diversity of tropical forest trees across landscapes
  • Characterization of tropical forest types, age, structure and change with satellite imagery
  • Tropical montane cloud forests and humid alpine systems




  • Oregon State University, Ph.D. Forest Ecology, Landscape ecology and remote sensing of tropical forests 1998
  • University of Minnesota, M.S.C.E. Environmental Engineering and Sciences, Water chemistry, aluminum geochemistry in peatland waters 1987
  • University of Illinois, B.S. Ecology, Ethology and Evolution 1984

Professional Experience

  • Ecologist, US Environmental Protection Agency, Region 5
    1990 - 1993
  • Environmental Engineer, U.S. Environmental Protection Agency, Region 5
    1988 - 1989

Professional Organizations

  • American Geophysical Union, Member (2004 - Current)
  • Association for Tropical Biology and Conservation, Member (2000 - Current)
  • Ecological Society of America, Member (1997 - Current)

Featured Publications & Products


Research Highlights


A Synthesis of How Multispectral Satellite Imagery Can Support Inventories of Greenhouse Gas Emissions from Tropical Forest Clearing and Regrowth

Human clearing, logging, and burning of tropical forests accounts for at least 19 percent of annual human-caused emissions of carbon dioxide to ...


Automated monitoring of tropical deforestation made easier

New algorithm permits automated tropical forest monitoring back to the 1970s and allows more frequent observations since the year 2015


Long-Term Seasonality of Greenness in Tropical Forest

Seasonal patterns of forest greenness (termed phenology) help guage forest productivity and health. Mapping changes in these patterns with satel ...


Mapping avian habitat characteristics using cloud-cleared satellite image mosaics

Forest age, vertical structure, disturbance For studies of wintering habitat for the endangered Kirtland's Warbler, scientists from the Forest S ...


Neotropical Cloud Forests to Lose What Most Defines Them: Clouds

In as few as 25 years, climate change could shrink and dry 60-80 percent of Western Hemisphere tropical montane cloud forests.


New Study Leads the Way to Detailed Mapping of Tropical Rain Forest Types

Tropical tree communities mapped for Trinidad and Tobago with satellite imagery


Nitrogen and Phosphorus Content in Forest Floor Litter is Elevated in a Tropical Landscape Recovering from Deforestation

Fallen leaf chemistry provides a window into the various and often complex factors affecting the availability of nutrients to trees. Both nitrog ...


Last updated on : 09/30/2021