Forest and Rangeland Ecosystem Science Center (FRESC)


Filter Total Items: 129
Date published: February 9, 2018

Survival and Movement of Stream Amphibians in Response to Timber Harvest

USGS scientists Nathan Chelgren and Michael Adams analyzed demographic rates – such as survival, movement, and growth – of aquatic life stages of coastal tailed frogs and coastal giant salamanders in a before-after timber harvest study in the Coast Range of western Oregon.

Date published: February 5, 2018

Survival and Movement of Stream Amphibians in Response to Timber Harvest

The effects of timber harvest on headwater stream amphibians have been studied extensively, but with conflicting or ambiguous results.

Date published: February 2, 2018

Food Web Model Informs River Restoration on the Barkley Bear Segment, Methow River

USGS, U.S. Forest Service, and Bureau of Reclamation scientists tested a biological-based food web model, the Aquatic Trophic Productivity (ATP) model, to inform the design a restoration project to improve conditions for declining numbers of juvenile Chinook salmon and steelhead in the Methow River, north-central Washington.

Date published: February 2, 2018

Origins of Lead in Populations of Wild Raptors

Many wildlife species are threatened by poisoning from anthropogenically derived lead, and routes of lead exposure are unclear.

Date published: February 2, 2018

DOI Remote Sensing Activities 2017 Includes FRESC Research on Lidar to Study Forest Habitat

The Department of the Interior has released a report of the DOI Remote Sensing Activities for 2017, which includes a summary of research that uses Lidar to study forest canopy. 

Date published: January 29, 2018

Food Web Model Informs River Restoration on the Barkley Bear Segment, Methow River

In planning restoration actions in rivers and streams, managers have typically used physical-based models.

Date published: January 5, 2018

Effects of Drought on Golden Eagles: Spatial Patterns in Occupancy and Reproduction

USGS scientists and collaborators investigated spatial patterns in occupancy and breeding success of golden eagles in the Altamont Pass Wind Resource Area, California and surrounding landscapes from 2014 – 2016, an exceptional drought period.

Date published: December 12, 2017

Saving Salamanders: Vital to Ecosystem Health

Amphibians—the big-eyed, swimming-crawling-jumping-climbing group of water and land animals that includes frogs, toads, salamanders and worm-like caecilians—are the world’s most endangered vertebrates. 

Date published: November 3, 2017

Analytical Framework for Assessing Landbird Population Characteristics Described in New Report

Scientists from USGS, NPS, and the Institute for Bird Populations developed a new framework for analyzing landbird population monitoring data from the NPS North Coast and Cascades Inventory and Monitoring Network (NCCN). 

Date published: October 27, 2017

California Condor Behavior Unresponsive to Lead Exposure

Scavenging birds are at risk of lead poisoning from consuming carcasses of animals killed with lead ammunition. Methods to identify lead exposure typically require capturing an animal to collect a blood sample; however, USGS and U.S. Fish and Wildlife Service researchers sought to design a less costly, noninvasive behavioral test to identify lead exposure in California condors.

Date published: July 21, 2017

New Study: Water, Grazing, and a Threatened Amphibian – Oregon Spotted Frog

A new study in the Klamath Marsh National Wildlife Refuge in south-central Oregon examines how Oregon spotted frogs use habitat in grazed areas, and will evaluate seasonal water quality and sediment conditions in response to grazing.

Date published: March 21, 2017

Livestock grazing effects on sage-grouse: study identifies options to sustain ranching and help wildlife

Effects of livestock grazing on greater sage-grouse populations can be positive or negative depending on the amount of grazing and when grazing occurs, according to research published today in Ecological Applications. The research was conducted by scientists from the United States Geological Survey, Colorado State University and Utah State University.