Skip to main content
U.S. flag

An official website of the United States government

Nancy E. Grulke

Nancy E. Grulke
Research Forest Ecologist
Ecological Process and Function
Deschutes National Forest
63095 Deschutes Market Road
Bend, OR 97701
United States
Phone
541-383-5479
Current Research
  • Development of a remote detection system for canopy health attributes and tree species identification using high resolution, multispectral imagery (cooperators: PJ Riggan; H Maffei)
  • Identifying the threshold of physiological drought stress that permits susceptibility to bark beetle in Jeffrey pine (cooperators: SJ Seybold; A Graves)
  • Long term plant community succession in arctic tundra (Arctic National Wildlife Refuge) and subalpine forests (Niwot Ridge, CO)
Research Interest
Understanding environmental tipping points that affect multiple trophic levels, such as:
  • Linkages between air pollution, drought, and increased forest susceptibility to wildfire
  • Linkages between drought, stand density, physiological tree drought stress, and level of bark beetle attack
  • Understanding environmental stressors (drought, elevated O3 exposure) and growth enhancers (CO2 enrichment, N deposition) on plant carbon and water balance.
Featured Publications
Other Publications
Research Highlights

A New Tool for Detecting and Attributing Cause of Tree Decline

Year: 2016
Insects and pathogens generally first kill branches at the top of a tree, whereas drought affects the lower branches first. Unlike satellite imagery, high-resolution imagery collected via small aircraft can detect these differences. This information, gathered over vast areas, helps land managers ide...

Statistical Prediction of Tree Mortality in California

Year: 2016
Large parts of California are currently experiencing dramatic levels of tree loss due to a combination of drought and bark beetles. Forest Service scientists developed forecasts of bark beetle locations and intensity of tree damage 6 months prior to completion of aerial surveys, enabling land manage...

Rapid forest health assessment to aid forest restoration

Year: 2017
Tool pre-loads maps trees in poor health to iPads for field verification and use.

Early tree mortality forecasts help California mitigate fire risk

Year: 2017
Forecasts help protect public health and property.

New tool helps in rapid forest health assessment to aid forest restoration

Year: 2017
Tool pre-loads maps of trees in poor health to iPads for field verification and use.

Remote Sensing Tools Preemptively Detect Drought-Stressed Pines with 80% Accuracy

Year: 2020
Large swaths of dead trees across a landscape pose an extreme fire hazard, as seen in the southern Sierra Nevada range of California. Researchers developed a method that uses remote sensing and spectral sensing to pre-emptively identify drought-stressed trees. Forest managers can use this advance no...
https://www.fs.usda.gov/research/about/people/ngrulke