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: 1,016
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Year Published: 2004

Geospatial techniques for developing a sampling frame of watersheds across a region

Current land-management decisions that affect the persistence of native salmonids are often influenced by studies of individual sites that are selected based on judgment and convenience. Although this approach is useful for some purposes, extrapolating results to areas that were not sampled is statistically inappropriate because the sampling...

Gresswell, Robert E.; Bateman, Douglas S.; Lienkaemper, George; Guy, T.J.

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Year Published: 2004

Importance of salmon to wildlife: Implications for integrated management

Salmon (Oncorhynchuss pp.) are an importantr esourcef or terrestriawl ildlife. However, the salmon requirements of wildlife populations and the role wildlife play in nutrient transport across ecosystems are largely ignored in salmon and habitat management. Any activity that reduces the availability of or access to salmon by wildlife may adversely...

Hilderbrand, Grant V.; Farley, Sean D.; Schwartz, Charles C.; Robbins, Charles T.

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Year Published: 2004

Yellowstone grizzly bear investigations: Annual report of the Interagency Grizzly Bear Study Team, 2003

The contents of this Annual Report summarize results of monitoring and research from the 2003 field season. The report also contains a summary of nuisance grizzly bear (Ursus arctos horribilis) management actions. The study team continues to work on issues associated with counts of unduplicated females with cubs-of-the-year (COY). These counts are...

Schwartz, Charles C.; Haroldson, Mark A.

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Year Published: 2004

Natural avalanches and transportation: A case study from Glacier National Park, Montana, USA

In January 2004, two natural avalanches (destructive class 3) derailed a freight train in John F. Stevens Canyon, on the southern boundary of Glacier National Park. The railroad tracks were closed for 29 hours due to cleanup and lingering avalanche hazard, backing up 112km of trains and shutting down Amtrak’s passenger service. The incident marked...

Reardon, B.A.; Fagre, Daniel B.; Steiner, R.W.

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Year Published: 2004

USA: Glacier National Park, Biosphere Reserve and GLORIA Site

The National Park Service of the United States has 388 designated protected areas and parks that include historic and cultural sites as well as ‘natural resource’ parks set aside for their unique and outstanding natural features. Early efforts to create parks were focused on areas of beauty or unusual features but later efforts...

Lee, Cathy; Schaaf, Thomas; Simmonds, Paul; Fagre, Daniel B.

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Year Published: 2004

Forecasting for natural avalanches during spring opening of Going-to-the-Sun Road, Glacier National Park, Montana, USA

The annual spring opening of the Going-to-the-Sun Road in Glacier National Park presents a unique avalanche forecasting challenge. The highway traverses dozens of avalanche paths mid-track in a 23-kilometer section that crosses the Continental Divide. Workers removing seasonal snow and avalanche debris are exposed to paths that can produce...

Reardon, Blase; Lundy, Chris

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Year Published: 2004

Modeling survival: application of the Andersen-Gill model to Yellowstone grizzly bears

 Wildlife ecologists often use the Kaplan-Meier procedure or Cox proportional hazards model to estimate survival rates, distributions, and magnitude of risk factors. The Andersen-Gill formulation (A-G) of the Cox proportional hazards model has seen limited application to mark-resight data but has a number of advantages, including the ability...

Johnson, Christopher J.; Boyce, Mark S.; Schwartz, Charles C.; Haroldson, Mark A.

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Year Published: 2004

What limits the Serengeti zebra population?

The populations of the ecologically dominant ungulates in the Serengeti ecosystem (zebra, wildebeest and buffalo) have shown markedly different trends since the 1960s: the two ruminants both irrupted after the elimination of rinderpest in 1960, while the zebras have remained stable. The ruminants are resource limited (though parts of the buffalo...

Grange, Sophie; Duncan, Patrick; Gaillard, Jean-Michel; Sinclair, Anthony R.E.; Gogan, Peter J.; Packer, Craig; Hofer, Heribert; Marion, East

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Year Published: 2004

Ecological response to global climatic change

Climate change and ecological change go hand in hand. Because we value our ecological environment, any change has the potential to be a problem. Geographers have been drawn to this challenge, and have been successful in addressing it, because the primary ecological response to climate changes in the past — the waxing and waning of the great...

Janelle, Donald G.; Warf, Barney; Hansen, Kathy; Malanson, G.P.; Butler, D.R.; Walsh, S. J.

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Year Published: 2004

Relative spatial distributions and habitat use patterns of sympatric moose and white-tailed deer in Voyageurs National Park, Minnesota

We examined the distribution and home range characteristics of moose (Alces alces) and white-tailed deer (Odocoileus virginianus) at Voyageurs National Park, Minnesota. Pellet count transects revealed low densities of moose and higher densities of white-tailed deer, and provided evidence of partial spatial segregation between moose and white-...

Cobb, M.; Gogan, P.J.P.; Kozie, K.D.; Olexa, E.M.; Lawrence, R.L.; Route, W.T.
Relative spatial distributions and habitat use patterns of sympatric moose and white-tailed deer in Voyageurs National Park, Minnesota; 2006; Article; Journal; Alces; Cobb, M.; Gogan, P. J. P.; Kozie, K. D.; Olexa, E. M.; Lawrence, R. L.; Route, W. T.

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Year Published: 2004

Integrated monitoring of hydrogeomorphic, vegetative, and edaphic conditions in riparian ecosystems of Great Basin National Park, Nevada

In semiarid regions such as the Great Basin, riparian areas function as oases of cooler and more stable microclimates, greater relative humidity, greater structural complexity, and a steady flow of water and nutrients relative to upland areas. These qualities make riparian areaʼs attractive not only to resident and migratory wildlife, but also to...

Beever, Erik A.; Pyke, D.A.
Integrated monitoring of hydrogeomorphic, vegetative, and edaphic conditions in riparian ecosystems of Great Basin National Park, Nevada; 2004; SIR; 2004-5185; Beever, Erik A.; Pyke, D. A.

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Year Published: 2004

Effects of the wildfire on growth of cutthroat trout in Yellowstone Lake

This chapter discusses the effects of wildfire on the growth of cutthroat trout in Yellowstone Lake. Trends in year-to-year variation in growth for individual age groups and 25 mm length groups of cutthroat trout in Yellowstone Lake were examined in an attempt to detect shifts in growth patterns associated with the fires. Approximately 100,000 ha...

Gresswell, R.E.