Forest and Rangeland Ecosystem Science Center (FRESC)


Filter Total Items: 131
Date published: July 19, 2019

Timber Harvest Alters Mercury Bioaccumulation and Food Webs in Headwater Streams

Land use change is an important driver of global mercury cycling. Timber harvest is a common land use that can alter associated aquatic ecosystems, yet little is known about how it affects mercury concentrations and associated food web changes. 

Date published: July 19, 2019

Cold Hardiness of Big Sagebrush May be Maladaptive in a Warmer Climate

Physiological responses to temperature extremes are considered strong drivers of plant species’ resilience to climate variability. 

Date published: July 12, 2019

Using Lidar to Map Solar Insolation in Riparian Areas

Stream temperature is affected by solar insolation, which is the amount of solar radiation at a given location over time. 

Date published: July 12, 2019

Effects of Barred Owl Removal on Population Demography of Northern Spotted Owls in Washington and Oregon, 2015–2018

A new USGS report summarizes research accomplishments and results from the first 3.5 years, 2015-2018, of a study in Oregon and Washington to determine if removing barred owls can improve population trends of Northern spotted owls. 

Date published: July 8, 2019

Two Promising Tackifiers may Enhance Moss Growth for Biocrust Restoration

Establishing mosses could be valuable in restoring biological soil crusts following disturbance, yet a good method for delivering and establishing moss propagules is lacking.

Date published: June 27, 2019

Climate and Disturbance Influence Dynamics of Aspen Near its Range Margin

Recent declines in aspen populations have occurred in the western U.S., especially along drought-sensitive margins of its range or where fire exclusion and herbivory have promoted community transition.

Date published: June 27, 2019

Why Sagebrush Re-establishment After Fire is so Difficult

Big sagebrush ecosystems are particularly sensitive to wildfires and life history information on big sagebrush is scarce and vital for restoration success.

Date published: June 27, 2019

Integrating Anthropogenic Factors into Regional-Scale Species Distribution Models

Species distribution models help researchers explore how environmental conditions influence the spatial pattern of species occurrence over large areas.

Date published: June 27, 2019

New Study: Golden Eagles in Yellowstone National Park and Their Role in the Greater Yellowstone Ecosystem

Golden eagles have only been recently studied in Yellowstone National Park and their status is still unknown.

Date published: June 14, 2019

Modeling Management Actions Helps Researchers Pinpoint the Main Culprit of Wood Frog Declines

Amphibian decline is a global conservation crisis driven by multiple interacting stressors, which often act at a local scale with global implications.

Date published: June 10, 2019

New Study: Distribution of the Foothill Yellow-Legged Frog in Oregon

USGS researchers are beginning a new technical assistance study to help identify the current distribution of Foothill Yellow-Legged Frogs in Oregon.

Date published: June 7, 2019

Researchers Compare Mercury in Songbird Feathers, Nails

Although feathers are commonly used to monitor mercury in birds, their reliability has not been assessed for many avian species, including most songbirds.