Northern Rocky Mountain Science Center

Publications

Below is a list of available NOROCK peer reviewed and published science. If you are in search of a specific publication and cannot find it below or through a search, please contact twojtowicz@usgs.gov.

Filter Total Items: 1,017
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Year Published: 2005

Monitoring temporal change in riparian vegetation of Great Basin National Park

Disturbance in riparian areas of semiarid ecosystems involves complex interactions of pulsed hydrologic flows, herbivory, fire, climatic effects, and anthropogenic influences. We resampled riparian vegetation within ten 10-m × 100-m plots that were initially sampled in 1992 in 4 watersheds of the Snake Range, east central Nevada. Our finding...

Beever, Erik A.; Pyke, David A.; Chambers, Jeanne C.; Landau, Fred; Smith, S.D.
Monitoring temporal change in riparian vegetation of Great Basin National Park; 2005; Article; Journal; Western North American Naturalist; Beever, Erik A.; Pyke, David A.; Chambers, Jeanne C.; Landau, Fred; Smith, S. D.

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Year Published: 2005

Nonlinear dynamics in ecosystem response to climatic change: Case studies and policy implications

Many biological, hydrological, and geological processes are interactively linked in ecosystems. These ecological phenomena normally vary within bounded ranges, but rapid, nonlinear changes to markedly different conditions can be triggered by even small differences if threshold values are exceeded. Intrinsic and extrinsic ecological thresholds can...

Burkett, Virginia R.; Wilcox, Douglas A.; Stottlemyer, Robert; Barrow, Wylie; Fagre, Dan; Baron, Jill; Price, Jeff; Nielsen, Jennifer L.; Allen, Craig D.; Peterson, David L.; Ruggerone, Greg; Doyle, Thomas
Nonlinear dynamics in ecosystem response to climatic change: case studies and policy implications; 2005; Article; Journal; Ecological Complexity; Burkett, Virginia R.; Wilcox, Douglas A.; Stottlemyer, Robert; Barrow, Wylie; Fagre, Dan; Baron, Jill; Price, Jeff; Nielsen, Jennifer L.; Allen, Craig D.; Peterson, David L.; Ruggerone, Greg; Doyle, Thomas

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Year Published: 2005

Population structure of Columbia spotted frogs (Rana luteiventris) is strongly affected by the landscape

Landscape features such as mountains, rivers, and ecological gradients may strongly affect patterns of dispersal and gene flow among populations and thereby shape population dynamics and evolutionary trajectories. The landscape may have a particularly strong effect on patterns of dispersal and gene flow in amphibians because amphibians are thought...

Funk, W.C.; Blouin, M.S.; Corn, P. S.; Maxell, B.A.; Pilliod, D. S.; Amish, S.; Allendorf, F.W.
Population structure of Columbia spotted frogs (Rana luteiventris) is strongly affected by the landscape; 2005; Article; Journal; Molecular Ecology; Funk, W. C.; Blouin, M. S.; Corn, P. S.; Maxell, B. A.; Pilliod, D. S.; Amish, S.; Allendorf, F. W.

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Year Published: 2005

Short-term responses of desert soil and vegetation to removal of feral burros and domestic cattle (California)

Beever, Erik A.; Pyke, David A.
Short-term responses of desert soil and vegetation to removal of feral burros and domestic cattle (California); 2005; Article; Journal; Ecological Restoration; Beever, Erik A.; Pyke, David A.

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Year Published: 2005

Should we expect population thresholds for wildlife disease?

Host population thresholds for invasion or persistence of infectious disease are core concepts of disease ecology, and underlie on-going and controversial disease control policies based on culling and vaccination. Empirical evidence for these thresholds in wildlife populations has been sparse, however, though recent studies have narrowed this gap...

Lloyd-Smith, James O.; Cross, P.C.; Briggs, C.J.; Daugherty, M.; Getz, W.M.; Latto, J.; Sanchez, M.; Smith, A.; Swei, A.
Should we expect population thresholds for wildlife disease?; 2005; Article; Journal; Trends in Ecology and Evolution; Lloyd-Smith, J. O.; Cross, P. C.; Briggs, C. J.; Daugherty, M.; Getz, W. M.; Latto, J.; Sanchez, M.; Smith, A.; Swei, A.

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Year Published: 2005

Spatial and temporal variability in the amount and source of dissolved organic carbon: Implications for ultraviolet exposure in amphibian habitats

The amount, chemical composition, and source of dissolved organic carbon (DOC), together with in situ ultraviolet (UV-B) attenuation, were measured at 1–2 week intervals throughout the summers of 1999, 2000, and 2001 at four sites in Rocky Mountain National Park (Colorado). Eight additional sites, four in Sequoia and Kings Canyon National...

Brooks, P.D.; O'Reilly, C. M.; Diamond, S.A.; Campbell, K.; Knapp, R.; Bradford, D.; Corn, P. S.; Hossack, B.; Tonnessen, K.
Spatial and temporal variability in the amount and source of dissolved organic carbon: Implications for ultraviolet exposure in amphibian habitats; 2005; Article; Journal; Ecosystems; Brooks, P. D.; O'Reilly, C. M.; Diamond, S. A.; Campbell, D. H.; Knapp, R.; Bradford, D.; Corn, P. S.; Hossack, B.; Tonnessen, K.

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Year Published: 2005

Status of amphibians on the Continental Divide:Surveys on a transect from Montana to Colorado, USA

The Rocky Mountain Region of the United States Geological Survey's Amphibian Research and Monitoring Initiative is conducting monitoring of the status of amphibians on a transect that extends along the Continental Divide from Canada to Colorado and comprises four National Parks. Monitoring uses visual encounter surveys to determine site occupancy...

Corn, P. S.; Hossack, B. R.; Muths, E.; Patla, D.A.; Peterson, C.R.; Gallant, Alisa L.
Status of amphibians on the Continental Divide: surveys on a transect from Montana to Colorado, USA; 2005; Article; Journal; Alytes; Corn, P.S.; Hossack, B.R.; Muths, E.; Patla, D.A.; Peterson, C.R.; Gallant, A.L.

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Year Published: 2005

The U.S. Geological Survey's Amphibian Research and Monitoring Initiative

The Amphibian Research and Monitoring Initiative (ARMI) began in 2000 as an attempt by the United States Geological Survey to determine the status and trends of amphibians on federal lands in the United States and its territories. ARMI research focuses on determining causes of declines, if observed, developing new techniques to sample populations...

Corn, P. S.; Muths, E.; Adams, M.J.; Dodd, C.K.
The U.S. Geological Survey's Amphibian Research and Monitoring Initiative; 2005; Article; Journal; Alytes; Corn, P.S.; Muths, E.; Adams, M.J.; Dodd, Jr., C.K.

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Year Published: 2005

Topography and vegetation as predictors of snow water equivalent across the alpine treeline ecotone at Lee Ridge, Glacier National Park, Montana, U.S.A.

We derived and implemented two spatial models of May snow water equivalent (SWE) at Lee Ridge in Glacier National Park, Montana. We used the models to test the hypothesis that vegetation structure is a control on snow redistribution at the alpine treeline ecotone (ATE). The statistical models were derived using stepwise and “best” subsets...

Geddes, C. A.; Brown, Daniel G.; Fagre, Daniel B.

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Year Published: 2005

Yellowstone bison fetal development and phenology of parturition

Knowledge of Yellowstone bison (Bison bison) parturition patterns allows managers to refine risk assessments and manage to reduce the potential for transmission of brucellosis between bison and cattle. We used historical (1941) and contemporary (1989–2002) weights and morphometric measurements of Yellowstone bison fetuses to describe fetal...

Gogan, P.J.P.; Podruzny, K.M.; Olexa, E.M.; Pac, H.I.; Frey, K.L.
Yellowstone bison fetal development and phenology of parturition; 2005; Article; Journal; Journal of Wildlife Management; Gogan, P. J. P.; Podruzny, K. M.; Olexa, E. M.; Pac, H. I.; Frey, K. L.

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Year Published: 2004

Sagebrush ecosystems: current status and trends.

The sagebrush (Artemisia spp.) biome has changed since settlement by Europeans. The current distribution, composition and dynamics, and disturbance regimes of sagebrush ecosystems have been altered by interactions among disturbance, land use, and invasion of exotic plants. In this chapter, we present the dominant factors that have influenced...

Beever, E.A.; Connelly, J.W.; Knick, S.T.; Schroeder, M.A.; Stiver, S. J.

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Year Published: 2004

Nutritional ecology of ursids: A review of newer methods and management implications

The capability to understand the nutritional ecology of free-ranging bears has increased dramatically in the last 20 years. Advancements have occurred because (1) managers and biologists recognized the need to link habitat quality, productivity, and variability with bear movements, home ranges, and demographic parameters like reproductive output,...

Robbins, Charles T.; Schwartz, Charles C.; Felicetti, L.A.