Forest and Rangeland Ecosystem Science Center

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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.

Date published: February 22, 2019

The Key to Successful Reintroduction of a Freshwater Fish

Species reintroduction is a powerful conservation tool when successful, but it is an expensive management strategy and for many species including freshwater fish, reintroduction attempts often fail.

Date published: February 1, 2019

Long-term Studies Reveal Climate Adaptation Patterns of Big Sagebrush

To understand plant genetic diversity and adaptations, scientist often conduct “common garden” experiments growing plants with diverse origins under the same soil and climatic conditions. However, most common garden studies may be too short to detect adaptive differences. Understanding climate adaptation of Wyoming Big Sagebrush could improve restoration strategies and success.

Date published: February 1, 2019

Compounding Climate Effects on Amphibians

In montane ecosystems of the U.S. Pacific Northwest, increasing temperatures are resulting in a transition from snow-dominated to rain-dominated precipitation events, reducing snowpack.

Date published: December 21, 2018

A Spatially Continuous Model of Annual Streamflow Permanence Throughout the Pacific Northwest

An interdisciplinary team comprised of USGS and university scientists has developed the Probability of Streamflow Permanence Model or PROSPER which predicts flow permanence for unregulated and minimally impaired streams in the Pacific Northwest.

Date published: December 14, 2018

Guide to Bees of Southern Idaho

Bees are an important part of natural ecosystems and thriving agricultural systems in southwest Idaho and other areas of the United States. Both introduced and native bees can provide ecosystem services by pollinating native plants and agricultural crops such as fruit trees. 

Date published: December 7, 2018

Estimating Extinction Risk for Multiple Populations When Data for Traditional Population Viability Analyses are Unavailable

Population viability analysis (PVA) bridges the gap between theoretical and applied ecology and is used to make policy decisions on high-profile conservation efforts. However, it’s use is limited to a single or few populations with long-term data.