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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...

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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.

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Year Published: 2017

FEQinput—An editor for the full equations (FEQ) hydraulic modeling system

IntroductionThe Full Equations Model (FEQ) is a computer program that solves the full, dynamic equations of motion for one-dimensional unsteady hydraulic flow in open channels and through control structures. As a result, hydrologists have used FEQ to design and operate flood-control structures, delineate inundation maps, and analyze peak-flow...

Ancalle, David S.; Ancalle, Pablo J.; Domanski, Marian M.
Ancalle, D.S., Ancalle, P.J., and Domanski, M.M., 2017, FEQinput—An editor for the full equations (FEQ) hydraulic modeling system: U.S. Geological Survey Fact Sheet 2017–3072, 4 p., https://doi.org/10.3133/fs20173072.

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Year Published: 2017

Hydrogeology and water quality of sand and gravel aquifers in McHenry County, Illinois, 2009-14, and comparison to conditions in 1979

Baseline conditions for the sand and gravel aquifers (groundwater) in McHenry County, Illinois, were assessed using data from a countywide network of 44 monitoring wells collecting continuous water-level data from 2009–14. In 2010, water-quality data were collected from 41 of the monitoring wells, along with five additional monitoring wells...

Gahala, Amy M.
Gahala, A.M., 2017, Hydrogeology and water quality of sand and gravel aquifers in McHenry County, Illinois, 2009-14, and comparison to conditions in 1979: U.S. Geological Survey Scientific Investigations Report 2017-5112, 91 p., https://doi.org/10.3133/sir20175112.

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Year Published: 2017

Climate change and alpine stream biology: progress, challenges, and opportunities for the future

In alpine regions worldwide, climate change is dramatically altering ecosystems and affecting biodiversity in many ways. For streams, receding alpine glaciers and snowfields, paired with altered precipitation regimes, are driving shifts in hydrology, species distributions, basal resources, and threatening the very existence of some habitats and...

Hotaling, Scott; Finn, Debra S.; Giersch, J. Joseph; Weisrock, David W.; Jacobsen, Dean
Hotaling, Scott & Finn, Deb & Giersch, Joe & Weisrock, David & Jacobsen, Dean. (2017). Climate change and alpine stream biology: progress, challenges, and opportunities for the future. Biological reviews of the Cambridge Philosophical Society. 92. . 10.1111/brv.12319

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Year Published: 2017

Guest editorial: Aquatic science in the Northwest

In recent years, Northwest Science has seen a significant increase in the number of submissions representing aquatic science. Our region is punctuated by aquatic systems. The current issue in particular, presents a number of new aquatic science contributions. Accordingly, Northwest Science invited the authors of this guest editorial to...

Sepulveda, Adam J.; Ray, Andrew M.
Adam J. Sepulveda and Andrew M. Ray. 2017. Guest Editorial: Aquatic Science in the Northwest. 2017. Northwest Science 91(3):230-233.

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Year Published: 2017

Potential paths for male-mediated gene flow to and from an isolated grizzly bear population

For several decades, grizzly bear populations in the Greater Yellowstone Ecosystem (GYE) and the Northern Continental Divide Ecosystem (NCDE) have increased in numbers and range extent. The GYE population remains isolated and although effective population size has increased since the early 1980s, genetic connectivity between these populations...

Peck, Christopher P.; van Manen, Frank T.; Costello, Cecily M.; Haroldson, Mark A.; Landenburger, Lisa; Roberts, Lori L.; Bjornlie, Daniel D.; Mace, Richard D.
Peck, C. P., F. T. van Manen, C. M. Costello, M. A. Haroldson, L. A. Landenburger, L. L. Roberts, D. D. Bjornlie, and R. D. Mace. 2017. Potential paths for male-mediated gene flow to and from an isolated grizzly bear population. Ecosphere 8(10):e01969. 10.1002/ecs2.1969 

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Year Published: 2017

Projected warming portends seasonal shifts of stream temperatures in the Crown of the Continent Ecosystem, USA and Canada

Climate warming is expected to increase stream temperatures in mountainous regions of western North America, yet the degree to which future climate change may influence seasonal patterns of stream temperature is uncertain. In this study, a spatially explicit statistical model framework was integrated with empirical stream temperature data (...

Jones, Leslie A.; Muhlfeld, Clint C.; Marshall, Lucy A.
Jones, Leslie A., Muhlfeld, Clint C., Marshall, Lucy A. 2017. Projected warming portends seasonal shifts of stream temperatures in the Crown of the Continent Ecosystem, USA and Canada. Climatic Change 144(4):641-655

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Year Published: 2017

Spatially explicit population estimates for black bears based on cluster sampling

We estimated abundance and density of the 5 major black bear (Ursus americanus) subpopulations (i.e., Eglin, Apalachicola, Osceola, Ocala-St. Johns, Big Cypress) in Florida, USA with spatially explicit capture-mark-recapture (SCR) by extracting DNA from hair samples collected at barbed-wire hair sampling sites. We employed a clustered sampling...

Humm, J.; McCown, J. Walter; Scheick, B.K.; Clark, Joseph D.
Humm, J., J. W. McCown, B. K. Scheick, and J. D. Clark. 2017. Spatially explicit population estimates for black bears based on cluster sampling. Journal of Wildlife Management 81:1187-1201.

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Year Published: 2017

Statistical design and analysis for plant cover studies with multiple sources of observation errors

Effective wildlife habitat management and conservation requires understanding the factors influencing distribution and abundance of plant species. Field studies, however, have documented observation errors in visually estimated plant cover including measurements which differ from the true value (measurement error) and not observing a species that...

Wright, Wilson J.; Irvine, Kathryn M.; Warren, Jeffrey M .; Barnett, Jenny K.
Wright WJ, Irvine KM, Warren JM, Barnett JK. Statistical design and analysis for plant cover studies with multiple sources of observation errors. Methods Ecol Evol. 2017;00:1–10. https://doi.org/10.1111/2041-210X.12825

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Year Published: 2017

Simulation of daily streamflow for 12 river basins in western Iowa using the Precipitation-Runoff Modeling System

The U.S. Geological Survey, in cooperation with the Iowa Department of Natural Resources, constructed Precipitation-Runoff Modeling System models to estimate daily streamflow for 12 river basins in western Iowa that drain into the Missouri River. The Precipitation-Runoff Modeling System is a deterministic, distributed-parameter, physical-process-...

Christiansen, Daniel E.; Haj, Adel E.; Risley, John C.
Christiansen, D.E., Haj, A.E., and Risely, J.C., 2017, Simulation of daily streamflow for 12 river basins in western Iowa using the Precipitation-Runoff Modeling System: U.S. Geological Survey Scientific Investigations Report 2017–5091, 27 p., https://doi.org/10.3133/sir20175091.

Filter Total Items: 181
February 23, 2016

Getting the bear's weight

One of the first measurements taken is the bear’s weight using a quadpod and electronic scale. 

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.
 

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.

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