Forest and Rangeland Ecosystem Science Center


Filter Total Items: 268
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.

Date published: May 31, 2019

Conservation Research Across Scales in a National Program

In 2000, the USGS Amphibian Research and Monitoring Initiative - or ARMI - was established, under the direction of the President and Congress, in response to worldwide declines in amphibian populations.

Date published: May 17, 2019

Mercury Exposure in Aquatic Invertebrates and Songbirds in the Greater Willamette River Basin

The Willamette River basin in western Oregon is a system with legacy mercury contamination from both mining and reservoirs

Date published: May 17, 2019

An Integrated Framework for Ecological Drought Across Riverscapes of North America

Climate change is increasing extreme droughts events, posing a threat to freshwater ecosystems, particularly with human demands for diminishing water supplies. 

Date published: April 19, 2019

How Spotted and Barred Owls Share the Forest

Over the past century barred owls have been expanding their range westward, encroaching into the old-forest habitat of their sister species, the federally threatened northern spotted owl. Population declines of spotted owls were originally attributed to habitat loss.

Date published: April 12, 2019

Effects of Red-cockaded Woodpecker Bottleneck and Current Management on Genetic Diversity

The red-cockaded woodpecker is a federally listed species that declined in the southeastern United States from approximately 1.6 million cooperative breeding groups historically to less than 3,500 groups by 1978 due to loss and degradation of habitat and fire suppression.

Date published: April 12, 2019

New Riverscape Model of Upstream Fish Migration

Survival and reproductive success of salmon and other diadromous fish depends on a return from the sea and upstream migration tens to thousands of miles through complex riverscapes to their birthplace.

Date published: April 5, 2019

When Are Eagles Likely to Collide with Aircraft?

Since the ban of DDT, bald eagle populations have rebounded to near-historic levels and aircraft strikes have increased since 1998. Wildlife-aircraft strikes are expensive and the large body size of the bald eagle increases the likelihood of aircraft damage and human injury when a collision occurs.

Date published: April 5, 2019

Disentangling Invasive Species and Habitat Effects in a Long-term Amphibian Study

In the Willamette Valley, Oregon, the invasive American bullfrog and a variety of non-native sport fish are implicated in declines of native amphibians. Few long-term community studies of invasive-native interactions exist, and such studies are often complicated by confounding habitat modifications.

Date published: April 5, 2019

A Users’ Guide for modeling Sockeye Salmon at Washington’s Lake Ozette

The sockeye salmon population of the Lake Ozette watershed in northwestern Washington has been federally listed as threatened since 1999. Although the population has grown, numbers remain insufficient to allow harvest.