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: 990
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Year Published: 2001

Florida panther habitat use response to prescribed fire

The Florida panther (Puma concolor coryi) is one of the most endangered mammals in the world, with only 30-50 adults surviving in and around Florida Panther National Wildlife Refuge and the adjacent Big Cypress National Preserve. Managers at these areas conduct annual prescribed burns in pine (Pinus sp.) as a cost-effective method of...

Dees, Catherine S.; Clark, Joseph D.; van Manen, Frank T.

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Year Published: 2001

Influence of basin and watershed characteristics on the nutrient chemistry of headwater streams in northern Idaho

Hossack, B. R.; Struhs, S.M.; Lohman, K.
Influence of basin and watershed characteristics on the nutrient chemistry of headwater streams in northern Idaho; 2001; Article; Journal; Verhandlungen der Internationalen Vereinigung fur Theoretische und Angewandte Limnologie; Hossack, B. R.; Struhs, S. M.; Lohman, K.

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Year Published: 2001

New approaches for sampling and modeling native and exotic plant species richness

Chong, G.W.; Reich, R.M.; Kalkhan, M.A.; Stohlgren, T.J.
New approaches for sampling and modeling native and exotic plant species richness; 2001; Article; Journal; Western North American Naturalist; Chong, G. W.; Reich, R. M.; Kalkhan, M. A.; Stohlgren, T. J.

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Year Published: 2001

On-line sulfur isotope analysis of organic material by direct combustion: Preliminary results and potential applications

Sulfur isotopes have received little attention in ecology studies because plant and animal materials typically have low sulfur concentrations (< 1 wt.%) necessitating labor-intensive chemical extraction prior to analysis. To address the potential of direct combustion of organic material in an elemental analyzer coupled with a mass spectrometer...

Kester, C.L.; Rye, R.O.; Johnson, C.A.; Schwartz, C.H.; Holmes, C.H.
On-line sulfur isotope analysis of organic material by direct combustion: Preliminary results and potential applications; 2001; Article; Journal; Isotopes in Environmental and Health Studies; Kester, C. L.; Rye, R. O.; Johnson, C. A.; Schwartz, Ch.; Holmes, Ch.

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Year Published: 2001

Pathology of brucellosis in bison from Yellowstone National Park

Between February 1995 and June 1999, specimens from seven aborted bison (Bison bison) fetuses or stillborn calves and their placentas, two additional placentas, three dead neonates, one 2-wk-old calf, and 35 juvenile and adult female bison from Yellowstone National Park (USA) were submitted for bacteriologic and histopathologic examination. One...

Rhyan, Jack C.; Gidlewski, T.; Roffe, T.J.; Aune, K.; Philo, L.M.; Ewalt, D.R.
Pathology of brucellosis in Bison from Yellowstone National Park; 2001; Article; Journal; Journal of Wildlife Diseases; Rhyan, J. C.; Gidlewski, T.; Roffe, T. J.; Aune, K.; Philo, L. M.; Ewalt, D. R.

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Year Published: 2001

Spawning migration of lacustrine-adfluvial bull trout in a natural area

We investigated the spawning migration of lacustrine-adfluvial bull trout Salvelinus confluentus in the North Fork Skokomish River in Olympic National Park (Washington State) during 1996. Day-snorkeling and electrofishing were conducted to determine timing and duration of the migration and the distribution and abundance of bull trout....

Brenkman, Samuel J.; Larson, Gary L.; Gresswell, Robert E.
Spawning migration of lacustrine-adfluvial bull trout in a natural area; 2001; Article; Journal; Transactions of the American Fisheries Society; Brenkman, Samuel J.; Larson, Gary L.; Gresswell, Robert E.

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Year Published: 2001

Whitebark pine decline: Infection, mortality and population trends

No abstract available.

Tomback, Diana F.; Arno, Stephen F.; Keane, Robert E.; Kendall, Katherine C.; Keane, Robert E.
Whitebark pine decline: infection, mortality and population trends; 2001; Article; Report; Whitebark pine communities: ecology and restoration; Kendall, K.C.; Keane, R.E.

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Year Published: 2000

Effects of food limitation and emigration on self-thinning in experimental minnow cohorts

1. The theory of food-regulated self-thinning (FST) for mobile animals predicts population density (N) to be an inverse function of mean body mass (W) scaled to an exponent (b), such that N = k W−b, where k is a constant. FST also predicts energy requirements (or energy flow) to remain constant over time (termed...

Dunham, J.B.; Dickerson, B. R.; Beever, E.; Duncan, R. D.; Vinyard, G.L.

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Year Published: 2000

Effect of hibernation and reproductive status on body mass and condition of coastal brown bears

We investigated the effect of hibernation and reproductive status on changes in body mass and composition of adult female brown bears (Ursus arctos) on the Kenai Peninsula, Alaska. This information is fundamental to understanding nutritional ecology of wild brown bear populations. Six adult females handled in the fall and following spring (paired...

Hilderbrand, Grant V.; Schwartz, C. C.; Robbins, C.T.; Hanley, Thomas A.

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Year Published: 2000

Abiotic and biotic controls of spatial pattern at alpine treeline

At alpine treeline, trees and krummholz forms affect the environment in ways that increase their growth and reproduction. We assess the way in which these positive feedbacks combine in spatial patterns to alter the environment in the neighborhood of existing plants. The research is significant because areas of alpine tundra are susceptible to...

Malanson, George P.; Xiao, Ningchuan; Alftine, K.J.; Bekker, Mathew; Butler, David R.; Brown, Daniel G.; Cairns, David M.; Fagre, Daniel; Walsh, Stephen J.

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Year Published: 2000

Elk, beaver, and the persistence of willows in national parks: comment on Singer et al. (1998).

Singer et al. (1998) propose that the decline in populations of beaver (Castor canadensis) in Yellowstone National Park (YNP) has caused willow to be more vulnerable to browsing by clk (Alces alces). I do not believe that their scenario correctly characterizes the relationship between elk and willow in YNP The authors developed their hypothesis...

Keigley, R.B.