Montana

Filter Total Items: 124
Female grizzly with cubs
Date Published: December 13, 2017
Status: Active

Interagency Grizzly Bear Study Team

The Interagency Grizzly Bear Study Team (IGBST) is an interdisciplinary group of scientists and biologists responsible for long-term monitoring and research efforts on grizzly bears in the Greater Yellowstone Ecosystem (GYE). The team was formed by the Department of the Interior (DOI) in 1973 as a direct result of controversy...

Wolf close up of eyes
Date Published: November 16, 2017
Status: Active

Impacts of Disease on Wolves in Yellowstone National Park

In 1995 and 1996, wolves were reintroduced into the Northern Rockies where they have since established and spread. Within Yellowstone National Park, one of the core protected release sites, the unmanaged population steadily increased to high densities, producing a large wolf population susceptible to infections such as canine parvovirus (CPV), canine distemper virus (CDV) and sarcoptic mange...

Contacts: Paul Cross, Emily Almberg, Doug Smith, Ellen Brandell & Peter Hudson
Bighorn sheep close up
Date Published: November 16, 2017
Status: Active

Pneumonia in Bighorn Sheep

Bighorn sheep populations are often impacted by outbreaks of pneumonia that are suspected to come from domestic sheep and goats.

Contacts: Paul Cross, Frances Cassirer, Raina Plowright, Peter Hudson, Tom Besser & Keiza Manlove, Andrew Dobson
Cattle Grazing at Sunset in Montana
Date Published: November 16, 2017
Status: Active

Quantitative Disease Ecology

Researchers at the USGS are working on developing new quantitative methods to study disease dynamics in wildlife systems as well as systems at the wildlife-domestic-human interface. Much of our work focuses on how host population structure affects disease invasion, persistence and control in wildlife disease systems. We tackle these issues with a combination of simulation and statistical...

Contacts: Paul Cross
Elk on a feedground in Wyoming.
Date Published: November 16, 2017
Status: Active

Brucellosis

Brucellosis is a nationally and internationally regulated disease of livestock with significant consequences for animal health, public health, and international trade.

Contacts: Paul Cross, Emily Almberg, Kelly Proffitt, Brandon Scurlock, & Eric Maichak, Jared Rogerson & Hank Edwards, Mark Drew & Paul Atwood , Eric Cole, Angela Brennan
Swiftcurrent Glacier 2016 (port)
Date Published: November 8, 2017
Status: Active

Swiftcurrent Glacier 1910 - 2016

In 1910, the year Glacier National Park was established, Swiftcurrent Glacier filled this hanging valley just below the Continental Divide.  In 2016, it is obvious where the glacier has receded from the cliff edge and lateral moraine that once defined its extent.  Swiftcurrent fire lookout can be seen on top of the pyramid-shaped mountain in the 2016 photo.  

Please respect the...

Grinnell Glacier, GNP - 2016 (terminus)
Date Published: November 8, 2017
Status: Active

Grinnell Glacier 1938 - 2016

Notice the man standing on the glacier in the center of the historic photograph.  The figure lends a frame of reference to the photo pair, allowing the viewer to more easily interpret the depth of ice and the loss of volume when compared to the 2016 image. 

Please respect the photographer: When using these photographs, please credit the photographer and source (eg. T.J. Hileman,...

Contacts: Lisa McKeon
Grinnell Glacier, GNP - 2016
Date Published: November 8, 2017
Status: Active

Grinnell Glacier 1911 - 2016

The historic image shows how the upper bench of ice flowed into the main body of Grinnell Glacier.  By the early 1920s, the glacier’s volume had been reduced to the point that the two pieces became disconnected.  The upper bench, considered a separate glacier, was later renamed The Salamander Glacier for its salamander-like profile against the headwall.  The Continental Divide runs along the...

Contacts: Lisa McKeon
Grinnell Glacier, GNP - 2016
Date Published: November 8, 2017
Status: Active

Grinnell Glacier, circa 1888-2016

This historic image is one of the oldest images re-photographed among the collection.  The massive wall of ice that constituted the terminus of Grinnell Glacier has receded beyond view from this point.  Each summer thousands of hikers take the well-worn trail to be rewarded with the sight of the remnant Grinnell Glacier and Upper Grinnell Lake.

Please respect the photographer: When...

Contacts: Lisa McKeon
Glacial fed alpine stream in Glacier National Park.
Date Published: September 13, 2017
Status: Active

Science in Glacier National Park

Glacier National Park (GNP) is considered a stronghold for a large diversity of plant and animal species and harbors some of the last remaining populations of threatened and endangered species such as grizzly bear and bull trout, as well as non threatened keystone species such as bighorn sheep and black bear. The mountain ecosystems of GNP that support these species are dynamic and influenced...

The Little Missouri River, flood plain
Date Published: August 30, 2017

Reconstructing Flow History From Riparian Tree Rings

Aquatic Systems Branch scientists analyze rings of riparian trees relating tree growth and establishment to historical flow. We then use the tree rings to reconstruct the flow in past centuries. Flow reconstructions discover the frequency and magnitude of past droughts and floods—information that is essential for management of rivers and water supplies. We also use downscaled climate...

This image shows the perimeter of Sperry Glacier in Glacier National Park in 1966,1998, 2005, and 2015.
Date Published: May 9, 2017

Time Series of Glacier Retreat

The retreat of glaciers in Glacier National Park, Montana, has received widespread attention by the media, the public, and scientists because it is a clear and poignant indicator of change in the northern Rocky Mountains of the USA.  In 2017 the...