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Filter Total Items: 186
Flattop Mountain SNOTEL site.
Date Published: April 26, 2016
Status: Active

Flattop Mountain SNOTEL Snowpack: Water Year 2018

The Flattop Mountain SNOTEL (SNOw TELemetry) station is one of nearly 600 similar stations operated throughout the western United States by the Natural Resources Conservations Service (NRCS, U.S. Department of Agriculture). These stations measure and record Snow Water Equivalent (SWE), which is the weight of snow water equivalent to inches of water. Most SNOTEL sites also measure temperature...

NOROCK emblem
Date Published: April 19, 2016
Status: Active

Member of the Media?

NOROCK scientists enjoy interactions and engagement with the media.  Please contact Suzanna Soileau to request an interview or learn more about the Center.  

Contacts: Suzanna Soileau
A burnt meadow.
Date Published: April 18, 2016

Remote Sensing and Fire Science

NOROCK science has developed capabilities for the remote sensing and evaluation of burns. Working with diverse institutions and individuals in fire science and information technology, we advance mutual interests of fire science partners by undertaking relevant research, and by disseminating findings through coordination and technology transfer. 

Contacts: Carl Key
Grizzly on a moth site.
Date Published: April 18, 2016
Status: Completed

IGBST Grizzly Bear Food Synthesis Report

How to Cite:  Interagency Grizzly Bear Study Team. 2013. Response of Yellowstone grizzly bears to changes in food resources: a synthesis. Report to the Interagency Grizzly Bear Committee and Yellowstone Ecosystem Subcommittee. Interagency Grizzly Bear Study Team, U.S. Geological Survey, Northern Rocky Mountain Science Center, Bozeman, Montana, USA.

Yellowstone Lake at sunset.
Date Published: April 13, 2016
Status: Active

Yellowstone Lake Acoustic Biotelemetry Project Home Page

Fishery biologists and managers are increasingly consumed with the recovery and restoration of native trout and salmon throughout the western United States. These fish historically inhabited a variety of freshwater habitats, but have declined due to habitat degradation, fragmentation and introduction of nonnative species. Introduced fishes constitute a major threat to the persistence of native...

Contacts: Bob Gresswell
Stream sampling in eastern Montana.
Date Published: April 13, 2016

Predicting Effects of Climate Change on Native Fishes in Northern Great Plains Streams

The Northern Great Plains of North America are a region of profound global importance because organisms that live in these semi-arid prairie environments have developed a unique ability to live through conditions of extreme heat, cold, floods, and drought. Prairie streams are essential components of these ecosystems because they provide critical “green lines” of habitat for both aquatic and...

Contacts: Bob Gresswell
Cows by a stream.
Date Published: April 13, 2016

Estimating Future Streamflow in Eastern Montana Using the Precipitation-Runoff Modeling System and the RegCM3 Regional Climate Model

Streams in the Northern Great Plains provide critical “green lines” of habitat for aquatic and terrestrial wildlife. However, changes in water quantity associated with global climate change may transform some prairie streams from essential refuges to habitats no longer capable of supporting fishes. Although studies have examined climate change effects on larger river basins across the United...

Contacts: Bob Gresswell
tree core sampling.
Date Published: April 13, 2016
Status: Active

Drivers of Drought in the Upper Colorado River Basin

The purpose of this project is to investigate Colorado River basin droughts, and the role of temperature in influencing runoff efficiency. The project uses paleoclimatic data to extend instrumental climate and flow records, along with projected warming to assess the range of possible conditions that may be expected to occur and to determine how warming temperatures may influence river flow and...

Contacts: Greg Pederson, Connie Woodhouse
American pika.
Date Published: April 13, 2016
Status: Active

Extinction dynamics and microrefugia of the American pika as climate changes.

Accurate projections of climate change and associated impacts on wildlife are now essential to conservation planning, but predictive models of range shifts for many species are often coarse, ignore extinction dynamics, and overestimate suitable habitat. Recent studies suggest the American pika (Ochotona princeps) is vulnerable to increasing heat stress in the Great Basin yet appears more...

Contacts: Aaron Johnston
A female grizzly with a cub.  Adult females are considered the most important segment of the grizzly population and consequently
Date Published: April 12, 2016

Grizzly Bear Dispersal

This work has two components. First, we developed a method to use our family tree data to examine dispersal. Next, we would like to apply this method to our updated and more complete family tree to improve our understanding of how grizzly bears disperse.

Contacts: Tabitha Graves
Huckleberries are central to the diets of bears, grouse, and other animals, as well as being a cultural and food resource.
Date Published: April 12, 2016

Predicting changes in Bear Foods

Huckleberries are central to the diets of bears, grouse, and other animals, as well as being a cultural and food resource for humans. Approximately 15% of the diet of bears in the Whitefish range and Glacier National Park is huckleberries, and huckleberries help bears gain weight for hibernation. Changes in climate lead to changes in vegetation phenology, productivity, and quality that may...

Contacts: Tabitha Graves
Grizzly family tree.
Date Published: April 12, 2016

Grizzly Bear Family Tree

Building a family tree of grizzly bears can both satisfy our natural curiosity about bear society and answer many ecologically important questions about the ways bears interact with each other and the landscape.

Contacts: Tabitha Graves
Filter Total Items: 247
An American bullfrog.
June 30, 2016

American bullfrog close-up

An American bullfrom is native to most eastern states, but considered invasive in the moutain west.

Scientists with headlight looking at samples at night time.
June 29, 2016

Night Sampling

USGS Fish Biologist Dave Combs searches through net contents for larval fish during night sampling on the Upper Missouri River.

Scientists standing on a boat capturing samples with a net in the water.
June 29, 2016

Night Sampling Boat

USGS fish biologist Dr. Pat Braaten and student contractor Garrett Cook inspect contents of a larval fish net during night sampling on the Upper Missouri River.

Scientist retrieving a fluorometer
June 29, 2016

Fluorometer Retrieval

Research hydrologist Dr. Susannah Erwin retrieves fluorometer from the Upper Missouri River to download dye trace data.

A hydraulic habitat assessment boat in the river
June 29, 2016

Hydraulic Habitat Assessment Boat

A U.S. Geological Survey hydraulic habitat assessment boat in not enough water.

Close-up view of tweezers picking up an ichthyoplankton sample.
June 28, 2016

Ichthyoplankton Sample

Typical contents of a net deployment showing larval fish, possibly pallid sturgeon.

The ADCP boat on the river
June 28, 2016


A US Geological Survey hydroacoustic survey boat measures velocity profiles on the Upper Missouri River.

Scientists in a boat reviewing data on a computer
June 28, 2016

ADCP Data Review

Research hydrologist Dr. Susannah Erwin and hydrologic technician Brian Anderson inspect ADCP data on the Upper Missouri River.

A boat going out on a river for sampling.
June 28, 2016

Boat Launch for Night Sampling

USGS fish biologists launch at sunset on the Upper Missouri River for a night of sampling for larval pallid sturgeon.

People sitting and standing listening to scientists talking.
June 27, 2016

Pre-Sample Briefing

Pre-deployment briefing for the Upper Missouri River Pallid Sturgeon Drift Study. Fish biologists and physical scientists from Montana Fish Wildlife and Parks, US Geological Survey, U.S. Fish and Wildlife Service, University of Montana, Nebraska Game and Parks Commission, and US Army Corps of Engineers go over the sample design and assignments.

A person's hands with gloves on looking at a drift sampe
June 27, 2016

Processing a Drift Sample

Student Contractor Garrett Cook processes a drift sample collected on June 27 shortly after the free embryos and beads were released. Note the small cluster of pallid sturgeon free embryos and green beads in the lower portion of the sorting tray. These embryos and beads were elements of the Upper Missouri River drift experiment.

People distributing free embryos to boats
June 27, 2016

Distribution of Free Embryos to Boats

Distribution of free embryos to boats in preparation for mass release.

Filter Total Items: 122
USGS science for a changing world logo
May 29, 2009

A new research project will use bear hair to study trends in a threatened grizzly bear population in Montana.
The U.S. Geological Survey (USGS) is beginning a new research project to evaluate the effectiveness of hair sampling to monitor population trends of grizzly bears in the Northern Continental Divide Ecosystem (NCDE) of northwestern Montana.

USGS science for a changing world logo
April 28, 2009

New U.S. Geological Survey research indicates that ammonia from water used in the production of natural gas from underground coal beds in Wyoming is entering the Powder River.
"High concentrations of ammonia are toxic, particularly at some of the higher pH values found in these discharged waters," said USGS scientist Richard Smith.

USGS science for a changing world logo
February 2, 2009

Striking new glacier retreat photographs created by the U.S. Geological Survey (USGS) visually illustrate the effects of climate change on Glacier National Park.
The glacier images reveal dramatic glacial decline over a century and are in line with predictions that all of the glaciers in Glacier National Park will disappear by 2030.

USGS science for a changing world logo
January 15, 2009

With an estimated population of 765, the genetic health of grizzly bears in northwest Montana is good, according to a study recently released in the publication Journal of Wildlife Management.

November 10, 2008

USGS Bakken expert to present findings at Energy Expo in Bismarck

U.S. Geological Survey (USGS) scientist Richard Pollastro, lead researcher on a recent study assessing the undiscovered oil resources in the Bakken Formation, will present at the Great Plains Energy Expo in Bismarck on Tuesday, November 11.

November 6, 2008

The Department of the Interior recently honored a team of USGS scientists and collaborators with the 2008 Environmental Achievement Award for the significant improvements they made to a contaminated aquifer in northeastern Montana.

September 16, 2008

A new study estimates that 765 grizzly bears make their home in the Northern Continental Divide Ecosystem, a 7.8 million acre area in northwest Montana stretching from north of Missoula, Mont., to the Canadian border.

June 29, 2008

A new research project will use bear hair to study trends in a threatened grizzly bear population in Montana.

June 17, 2008

Long-term trends in landscape conditions have significantly reduced sagebrush habitat and populations of greater sage-grouse, according to a new study examining the bird's chances of survival.

April 10, 2008

North Dakota and Montana have an estimated 3.0 to 4.3 billion barrels of undiscovered, technically recoverable oil in an area known as the Bakken Formation.

July 9, 2007

A report published by the U.S. Geological Survey (USGS) contains a regional map and associated database that inventory 61 locations of reported natural asbestos and fibrous amphibole occurrences in the Rocky Mountain area of the United States, including the states of Colorado, Idaho, Montana, New Mexico, and Wyoming.

May 9, 2007

People who felt the magnitude 4.6 earthquake that hit Western Montana on May 8 can report their experiences during the temblor at the U.S. Geological Survey (USGS) Web site, "Did You Feel It?" at http://pasadena.wr.usgs.gov/shake/STORE/X2007ccay/ciim_display.html, or go to the USGS Web site http://earthquake.usgs.gov, and click on "Did You Feel It?"