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Filter Total Items: 151
Image: Garden Wall Weather Station, MT
Date Published: May 5, 2016
Status: Active

Climate Change in Mountain Ecosystems (CCME)

Climate change is widely acknowledged to be having a profound effect on the biosphere with many and diverse impacts on global resources. Mountain ecosystems in the western U.S. and the Northern Rockies in particular are highly sensitive to climate change. In fact, the higher elevations of the Northern Rockies have experienced three times the global average temperature increase over the past...

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
Black Bear and Cub in Montana
Date Published: April 12, 2016

Joe Clark's Research

This is a summary of the research focus for Dr. Joe Clark.

Contacts: Joseph Clark
Inserting telemetry devise on a fish.
Date Published: April 12, 2016
Status: Active

Evaluating the linkages between regional climate patterns, local climate data, and native Yellowstone cutthroat trout (Oncorhynchus clarkii bouvieri) and non-native brook trout (Salvelinus fontinalis) growth, survival, and life-history expressions.

Beyond large-scale climate models, it is becoming increasingly important to quantify how regional climate patterns link with in situ stream temperatures and hydrologic regimes and concomitantly, fish behavior, growth, and survival. Here, we are using comprehensive mark-recapture techniques to evaluate how changing climatic conditions are likely to influence native westslope cutthroat trout and...

Muddy forest road.
Date Published: April 12, 2016

Improving our understanding of forest-road effects on substrate in headwater streams of the Southwest Crown of the Continent

In 2010, Congress established ten decade-long Collaborative Forest Landscape Restoration Program projects to carry out fuel reduction and ecological restoration treatments on public lands across the country. The Southwest Crown of the Continent was selected as one of the locations under this initiative, given the importance of this region to the economic vitality of local communities and the...

Yellowstone stream temperature sampling.
Date Published: April 12, 2016
Status: Active

Developing stream temperature networks for the Greater Yellowstone to aid in managing aquatic resources under a changing climate

The topographic diversity and extensive area of protected public land within the Greater Yellowstone demonstrate the importance of this region as a natural resource reserve. Understanding the effects of anticipated changes in climate on aquatic resources and means for managing these resources will ultimately require accurate linkages between empirical data and regional climatic patterns. This...

Image of Lahontan cutthroat trout.
Date Published: April 12, 2016

Food web and Pyramid Lake fishery evaluation

Lahontan cutthroat trout (Oncorhynchus clarkii henshawi) is an important cultural and economic resource to the Pyramid Lake Paiute Tribe and a Threatened species under the Endangered Species Act. Here we are integrating the food web information with field estimates of Lahontan cutthroat vital rate and growth information to guide future management and recovery efforts within Pyramid Lake and...

Native westslope cutthroat trout swim in the north fork of the Flathead River in northwestern Montana.
Date Published: April 12, 2016

Forecasting the effects of climate change on the interactions of native and non-native salmonids

Changes in temperature and precipitation patterns under global climate change are expected to expand the range of suitable habitat for non-natives within stream networks, resulting in significant increases in the distribution and abundance of non-natives. However, our understanding of how landscape attributes can affect local thermal and hydrologic patterns suggests that changes in global...

Westslope cutthroat trout and bull trout in the North Fork of the Flathead River, Montana.
Date Published: April 12, 2016
Status: Active

Evaluating the reintroduction potential and limiting factors associated with anadromous fish reintroductions in the Upper Lewis River, WA

Hydropower facilities on the Lewis River, WA eliminated historic runs of anadromous species to the headwaters of the Lewis River. As anadromous reintroductions are considered and implemented, there remains considerable uncertainty in the viability of reintroductions in reservoir and tributary systems where large populations of non-native species persist and where spawning and rearing habitat...

Filter Total Items: 1,762
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Year Published: 2017

Species account: Ochotona princeps (American pika)

No abstract available.

Beever, Erik A.; Ray, Chittaranjan; Smith, Andrew T.

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Year Published: 2017

Species account: Sylvilagus nuttallii (Mountain cottontail)

No abstract available.

Beever, Erik A.; Larrucea, Eveline A.

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Year Published: 2017

Contaminant gradients in trees: Directional tree coring reveals boundaries of soil and soil-gas contamination with potential applications in vapor intrusion assessment

Contaminated sites pose ecological and human-health risks through exposure to contaminated soil and groundwater. Whereas we can readily locate, monitor, and track contaminants in groundwater, it is harder to perform these tasks in the vadose zone. In this study, tree-core samples were collected at a Superfund site to determine if the sample-...

Wilson, Jordan L.; Samaranayake, V.A.; Limmer, Matthew A.; Schumacher, John G.; Burken, Joel G.
Wilson, J.L., Samaranayake, V.A., Limmer, M.A., Schumacher, J.G., Burken, J.G., 2017, Contaminant Gradients in Trees: Directional Tree Coring Reveals Boundaries of Soil and Soil-Gas Contamination with Potential Applications in Vapor Intrusion Assessment: Environmental Science and Technology, Just Accepted Manuscript. DOI: 10.1021/acs.est.7b03466.

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Year Published: 2017

Status and conservation of Yellowstone cutthroat trout in the Greater Yellowstone Area

No abstract available.

Al-Chokhachy, Robert K.; Shepard, Bradley; Burckhardt, Jason; Opitz, Scott; Garren, Dan; Koel, Todd M.; Nelson, Lee M.
Al-Chokhachy, R., B.B. Shepard, J.C. Burckhardt, S. Optiz, D. Garren, T.M. Koel and M.L. Nelson. 2017. Status and Conservation of Yellowstone Cutthroat Trout in the Greater Yellowstone Area. Yellowstone Science 25(1). https://www.nps.gov/articles/status-and-conservation-of-yellowstone-cutthroat-trout-in-the-gye.htm

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Year Published: 2017

Using carbon dioxide in fisheries and aquatic invasive species management

To restore native fish populations, fisheries programs often depend on active removal of aquatic invasive species. Chemical removal can be an effective method of eliminating aquatic invasive species, but chemicals can induce mortality in nontarget organisms and persist in the environment. Carbon dioxide (CO2) is an emerging alternative to...

Treanor, Hilary B.; Ray, Andrew M.; Layhee, Megan J.; Watten, Barnaby J.; Gross, Jason A.; Gresswell, Robert E.; Webb, Molly A. H.
Treanor, H.B., A.M. Ray, M. Layhee, B.J. Watten, J.A. Gross, R.E. Gresswell, and M.A.H. Webb. 2017. Using carbon dioxide in fisheries and aquatic invasive species management. Fisheries 42 (12):621-628.

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Year Published: 2017

Application of synthetic scenarios to address water resource concerns: A management-guided case study from the Upper Colorado River Basin

Water managers are increasingly interested in better understanding and planning for projected resource impacts from climate change. In this management-guided study, we use a very large suite of synthetic climate scenarios in a statistical modeling framework to simultaneously evaluate how (1) average temperature and precipitation changes, (2)...

McAfee, Stephanie A.; Pederson, Gregory T.; Woodhouse, Connie A.; McCabe, Gregory
Stephanie A. McAfee, Gregory T. Pederson, Connie A. Woodhouse, Gregory J. McCabe, Application of synthetic scenarios to address water resource concerns: A management-guided case study from the Upper Colorado River Basin, Climate Services, Volume 8, 2017, Pages 26-35, ISSN 2405-8807, https://doi.org/10.1016/j.cliser.2017.10.003.

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Year Published: 2017

Estimating virus occurrence using Bayesian modeling in multiple drinking water systems of the United States

Drinking water treatment plants rely on purification of contaminated source waters to provide communities with potable water. One group of possible contaminants are enteric viruses. Measurement of viral quantities in environmental water systems are often performed using polymerase chain reaction (PCR) or quantitative PCR (qPCR). However, true...

Varughese, Eunice A.; Brinkman, Nichole E; Anneken, Emily M; Cashdollar, Jennifer S; Fout, G. Shay; Furlong, Edward T.; Kolpin, Dana W.; Glassmeyer, Susan T.; Keely, Scott P
Varughese, E.A., Brinkman, N.E., Anneken, E.M., Cashdollar, J.L., Shay Fout, G., Furlong, E.T., Kolpin, D.W., Glassmeyer, S.T., Keely, S.P. 2018. Estimating virus occurrence using Bayesian modeling in multiple drinking water systems of the United States. Sci. Total Environ. v. 619-620, p. 1330-1339.

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Year Published: 2017

Estimating discharge and nonpoint source nitrate loading to streams from three end‐member pathways using high‐frequency water quality data

The myriad hydrologic and biogeochemical processes taking place in watersheds occurring across space and time are integrated and reflected in the quantity and quality of water in streams and rivers. Collection of high‐frequency water quality data with sensors in surface waters provides new opportunities to disentangle these processes and quantify...

Miller, Matthew P.; Tesoriero, Anthony J.; Hood, Krista; Terziotti, Silvia; Wolock, David M.

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Year Published: 2017

Investigating the influence of nitrate nitrogen on post-smolt Atlantic salmon Salmo salar reproductive physiology in water recirculation aquaculture systems

A major issue affecting land-based, closed containment Atlantic salmon Salmo salar growout production in water recirculation aquaculture systems (RAS) is precocious male maturation, which can negatively impact factors such as feed conversion, fillet yield, and product quality. Along with other water quality parameters, elevated ...

Good, Christopher; Davidson, John; Iwanowicz, Luke R.; Meyer, Michael T.; Dietze, Julie E.; Kolpin, Dana W.; Marancik, David; Birkett, Jill; Williams, Christina; Summerfelt, Steven T.

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Year Published: 2017

Streamflow conditions along Soldier Creek, Northeast Kansas

The availability of adequate water to meet the present (2017) and future needs of humans, fish, and wildlife is a fundamental issue for the Prairie Band Potawatomi Nation in northeast Kansas. Because Soldier Creek flows through the Prairie Band Potawatomi Nation Reservation, it is an important tribal resource. An understanding of historical...

Juracek, Kyle E.
Juracek, K.E., 2017, Streamflow conditions along Soldier Creek, Northeast Kansas: U.S. Geological Survey Fact Sheet 2017–3083, 4 p., https://doi.org/10.3133/fs20173083.

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Year Published: 2017

Tree sampling as a method to assess vapor intrusion potential at a site characterized by VOC-contaminated groundwater and soil

Vapor intrusion (VI) by volatile organic compounds (VOCs) in the built environment presents a threat to human health. Traditional VI assessments are often time-, cost-, and labor-intensive; whereas traditional subsurface methods sample a relatively small volume in the subsurface and are difficult to collect within and near structures. Trees could...

Wilson, Jordan L.; Limmer, Matthew A.; Samaranayake, V.A.; Schumacher, John G.; Burken, Joel G.
Wilson, J.L., Limmer, M.A., Samaranayake, V.A., Schumacher, J.G., Burken, J.G., 2017, Tree Sampling as a Method to Assess Vapor Intrusion Potential at a Site Characterized by VOC-Contaminated Groundwater and Soil: Environmental Science and Technology, v. 51, no. 18, pp. 10369-10378. DOI: 10.1021/acs.est.7b02667.

Filter Total Items: 178
February 23, 2016

Getting set up

Biologists are very careful to keep the grizzly bear under shade and protected from the elements while they collect biological data.  Vital signs are monitored throughout the handling period. 

February 23, 2016

Close up

The kerchief over the grizzly bear’s eyes protects it from dust and debris and reduces visual stimulation. The small tubing in its nose, known as a nasal cannula, delivers oxygen to the animal while it is tranquilized.  

February 23, 2016

Assessing body fat percentage of grizzly bear

Field personnel use bioelectrical impedance to assess body fat percentage of captured bears.  The procedure is similar to how body fat is measured in humans and is based on the resistance of body tissues to the flow of a small, harmless electrical signal.  The electrical current is impeded more by fat tissues compared with tissues that are composed mostly of water, thus

...
February 23, 2016

Measuring the bear's head length

A biologist measures a grizzly bear’s head length.

February 23, 2016

Measuring the bear's body length

Biologists measure a grizzly bear’s body length.

February 23, 2016

Measuring the bear's paw

Biologists measure a grizzly bear’s paw width. 

February 23, 2016

Fitting a radio collar

Biologists with IGBST and the National Park Service fit a grizzly bear with a radio collar.  Once a bear is radio collared, biologists can track its movements with telemetry.

Grizzly released from trap
February 23, 2016

Grizzly released from trap

After the grizzly bear recovers fully from the anesthesia, it is released back into the wilderness.  

February 23, 2016

Telemetry by air

Once a grizzly bear is radio collared, biologists can track its movements with telemetry via airplane.  The IGBST also used the latest telemetry technologies, which allows downloading of GPS data from the radio collar via satellites.

February 23, 2016

Telemetry by foot

Once a grizzly bear is radio collared, biologists can track its movements with telemetry on foot.   

January 29, 2016

Precipitation Runoff Modeling System (PRMS) Summary Modules

Presents descriptions of the USGS Precipitation Runoff Modeling System (PRMS) Summary modules.
 

January 29, 2016

Precipitation Runoff Modeling System (PRMS) Soil Zone Modules

Presents descriptions of the USGS Precipitation Runoff Modeling System (PRMS) Soilzone module.
 

Filter Total Items: 106
Image: USGS Great Lakes Science Center
March 11, 2015

The U.S. Geological Survey awarded a $9.7 million contract to Crittenden Construction out of Alpena, Michigan, on March 5 for the construction and renovation of the USGS Great Lakes Science Center Hammond Bay Biological Station near Millersburg, Michigan. The renovation is a joint effort between the USGS and the Great Lakes Fishery Commission. 

collage of scientists conducting science related to each mission are
February 2, 2015

New and improved science tools can help managers and researchers evaluate current threats and develop management strategies to protect and restore the valuable Great Lakes ecosystem.

USGS
December 16, 2014

The U.S. Geological Survey has released a new report detailing changes of groundwater levels in the High Plains Aquifer. The report presents water-level change data in the aquifer for two separate periods: from 1950 – the time prior to significant groundwater irrigation development – to 2013, and 2011 to 2013.

USGS
November 24, 2014

Climate change could lengthen the growing season, make soil drier and decrease winter snowpack in the Lake Michigan Basin by the turn of the century, among other hydrological effects.

USGS
October 29, 2014

Wichita’s water-use strategy has helped preserve the Equus Beds aquifer during the recent drought of 2011-12, according to a new report released by the U.S. Geological Survey and prepared in cooperation with the city of Wichita.

Image: Flooding in Nebraska
October 1, 2014

Scientists and technicians from the U.S. Geological Survey are conducting flood measurements in four different locations in the Lincoln and Omaha metropolitan areas in response to the high flows produced by the heavy rains over the last 24 hours.

USGS
September 11, 2014

Above normal precipitation in the Heart, Knife and Green River Basins of North Dakota led to record-breaking streamflows at several U.S. Geological Survey streamgages this past August.

USGS
August 4, 2014

The U.S. Geological Survey will celebrate the newest addition to its fleet of large research vessels in a traditional Christening and commissioning ceremony at the Lake Ontario Event and Conference Center in Oswego, New York, on Wednesday, August 6. 

USGS
July 24, 2014

Insecticides similar to nicotine, known as neonicotinoids, were found commonly in streams throughout the Midwest, according to a new USGS study. This is the first broad-scale investigation of neonicotinoid insecticides in the Midwestern United States and one of the first conducted within the United States.

USGS science for a changing world logo
March 11, 2014

Asian carp eggs, including late-stage embryos nearly ready to hatch from the egg, were recently identified in samples collected by U.S. Geological Survey scientists in 2013 from the Upper Mississippi River as far north as Lynxville, Wisc.

Filter Total Items: 119