The scientists from the Forest and Rangeland Ecosystem Science Center capitalize on their diverse
expertise to answer critically important scientific questions shaped by the equally diverse environments
of the western United States. FRESC scientists collaborate with each other and with partners to provide
rigorous, objective, and timely information and guidance for the management and
conservation of biological systems in the West and worldwide.
In the Spotlight
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New Study: Assessing Cold-Water Refuges in the Pend Oreille River Basin
The Kalispel Tribe in northeastern Washington is located along the Pend Oreille River, home to culturally important, cold-water fish, such as bull trout and cutthroat...
Factsheet: Project to Study Mercury Cycling in the Snake River
A new USGS factsheet describes a project to measure mercury cycling in the Hells Canyon Complex – or HCC – a hydroelectric project on the Snake River bordering Oregon...
New Study: Re-Measuring Post-Fire Sagebrush Growth
From 1998 to 2011, USGS researchers began a series of investigations into how post-fire seeding projects in the Great Basin restore native vegetation and decrease...
New Study: Mercury Bioaccumulation and Ecological Risk in Mount Rainier National Park
A recent inspection of fish from 21 national parks across the western United States suggested that Mount Rainier National Park had the largest range in fish mercury...
A Technique to Differentiate Male and Female Grebes
Physical similarities among some species of male and female birds make it difficult to correctly assign gender, yet discriminant function analysis can help predict the...
Conservation of Native Pacific Trout Diversity in Western North America
Pacific trout in western North America are valued ecologically and culturally, yet recent declines in some trout populations reflect the challenges of balancing current...
conducts research that focuses on amphibian conservation issues, including invasive species, disease, and land-use change. Using comparative surveys, experiments, and decision analytics Mike and his staff investigate factors that affect amphibian abundance and distribution. Mike is the national lead for the USGS Amphibian Research and Monitoring Initiative (ARMI), created in response to worldwide concern about declining amphibian populations.
The Oregon Spotted Frog
once occurred from southwest British Columbia to northeastern California, but habitat loss and alteration, introduced predators, and water quality degradation have led to population declines. Dr. Michael Adams’s laboratory studies occupancy patterns, population demography, and management options to better understand the status of the Oregon spotted frog in Oregon and inform its recovery. Researchers examine relationships between Oregon spotted frog population trends and habitat variables to understand factors contributing to Oregon spotted frog declines. They also construct models that help evaluate management options.