Skip to main content
U.S. flag

An official website of the United States government

Sarah Jovan, Dr

Sarah Jovan, Dr
 Research Ecologist
Resource Monitoring and Assessment
620 SW Main, Suite 502
Portland, OR 97205-3028
United States
Featured Publications
Other Publications
Research Highlights

Quantifying the Ecological Risk from Nitrogen and Sulfur Deposition Across U.S. forests

Year: 2019
Many species of lichen are very sensitive to air pollution, making them useful bioindicators of environmental health. Preventing pollution levels from exceeding the point at which lichen can no longer survive would help meet USDA Forest Service mission operational goals to protect biodiversity and s...

An Innovative Study Uses Moss to Measure Air Toxin Levels at Schools in Portland, Oregon

Year: 2015
Air pollution has been linked to major health problems including cancer, cardiovascular disease, and adverse birth outcomes. Children can be particularly vulnerable to airborne toxins such as heavy metals. Forest Service scientists are conducting an inventive study that uses moss samples to measure ...

New Method Monitors Species Groups and Estimates Carbon Storage in Moss and Lichen Layers in Boreal and Temperate Forests

Year: 2015
Mat forming ground layers of mosses and lichens are responsible for sequestering one-third of the world’s terrestrial carbon, regulating water tables, cooling soils, and inhibiting microbial decomposition. Without reliable assessment tools, the potential effects of climate and land-use changes on th...

Lichen Indicate Air Quality Near Natural Gas Wells

Year: 2014
Nitrogen in lichen tissues closely correlates with measured nitrogen deposition in forests near natural gas wells in the Bridger Wilderness, WY. The Clean Air Act mandates that federal land managers protect air quality-related values for Federal Class I parks and wilderness. The mandate involves ass...

Lichen Are Indicators of Climate Change in Southern Alaska's Forests

Year: 2014
Lichens respond quickly to climate changes and potentially allow early detection of shifting conditions before other changes in vegetation are apparent. This research identified lichen species and geographic regions in Alaska expected to be the most sensitive to climate change.

Lichen Communities Serve as Canary in the Coal Mine for Air Pollution

Year: 2012
A comparison of lichen communities from 1976 to 2008 suggests continued deterioration of air quality in the Los Angeles Basin despite policy and technological advances