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: 1,011
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Year Published: 2003

Mitochondrial phylogeography of moose (Alces alces) in North America

Nucleotide variation was assessed from the mitochondrial control region of North American moose (Alces alces) to test predictions of a model of range expansion by stepping-stone dispersal and to determine whether patterns of genetic variation support the current recognition of 4 subspecies. Haplotypes formed a star phylogeny indicative of a recent...

Hundertmark, Kris J.; Bowyer, R. Terry; Shields, Gerald F.; Schwartz, Charles C.

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Year Published: 2003

A method for determining the onset year of intense browsing

McAuliffe studied the factors limiting seedling establishment of a common Sonoran Desert tree, Cercidium microphyllum, at three sites in bajada habitat in Arizona and Mexico. Distribution patterns of Cercidium seedlings in both habitats were random when seedlings emerged, however, seedling distribution in bajadas quickly became non-random and...

Keigley, R.B.; Frisina, M.R.; Fager, C.

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Year Published: 2003

A quantitative evaluation of two methods for preserving hair samples

Hair samples are an increasingly important DNA source for wildlife studies, yet optimal storage methods and DNA degradation rates have not been rigorously evaluated. We tested amplification success rates over a one-year storage period for DNA extracted from brown bear (Ursus arctos) hair samples preserved using silica desiccation and -20C freezing...

Roon, David A.; Waits, L.P.; Kendall, K.C.
A quantitative evaluation of two methods for preserving hair samples; 2003; Article; Journal; Molecular Ecology Notes; Roon, D. A.; Waits, L. P.; Kendall, K. C.

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Year Published: 2003

Conservation of North American stream amphibians

Abstract has not been submitted

Semlitsch, R.; Corn, P. S.; Bury, R.B.; Hyde, E.J.
Conservation of North American stream amphibians; 2003; Book chapter; BOOK; Amphibian conservation; Corn, P. S.; Bury, R. B.; Hyde, E. J.

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Year Published: 2003

Effects of fire on fish populations: Landscape perspectives on persistance of native fishes and nonnative fish invasions

Our limited understanding of the short and long-term effects of fire on fish contributes to considerable uncertainty in assessments of the risks and benefits of fire management alternatives. A primary concern among the many potential effects of fire is the effects of fire and fire management on persistence of native fish populations. Limited...

Dunham, J.B.; Young, M.; Gresswell, Robert E.; Rieman, B.
Effects of fire on fish populations: Landscape perspectives on persistance of native fishes and nonnative fish invasions; 2003; Article; Journal; Forest Ecology and Management; Dunham, J. B.; Young, M.; Gresswell, Robert E.; Rieman, B.

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Year Published: 2003

Exploration and discovery in Yellowstone Lake: Results from high-resolution sonar imaging, seismic reflection profiling, and submersible studies

Discoveries from multi-beam sonar mapping and seismic reflection surveys of the northern, central, and West Thumb basins of Yellowstone Lake provide new insight into the extent of post-collapse volcanism and active hydrothermal processes occurring in a large lake environment above a large magma chamber. Yellowstone Lake has an irregular bottom...

Morgan, L.A.; Shanks, Wayne C.; Lovalvo, D.A.; Johnson, S.Y.; Stephenson, W.J.; Pierce, K.L.; Harlan, S.S.; Finn, C.A.; Lee, G.; Webring, M.; Schulze, B.; Duhn, J.; Sweeney, R.; Balistrieri, L.

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Year Published: 2003

Feedback-driven response to multidecadal climatic variability at an alpine treeline

The Pacific Decadal Oscillation (PDO) has significant climatological and ecological effects in northwestern North America. Its possible effects and their modification by feedbacks are examined in the forest-tundra ecotone in Glacier National Park, Montana, USA. Tree ring samples were collected to estimate establishment dates in 10 quadrats. Age-...

Alftine, K.J.; Malanson, G.P.; Fagre, D.B.

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Year Published: 2003

Fire and amphibians in North America

Information on amphibian responses to fire and fuel reduction practices is critically needed due to potential declines of species and the prevalence of new, more intensive fire management practices in North American forests. The goals of this review are to summarize the known and potential effects of fire and fuels management on amphibians and...

Pilliod, D. S.; Bury, R.B.; Hyde, E.J.; Pearl, C.A.; Corn, P. S.
Fire and amphibians in North America; 2003; Conference Paper; Forest Ecology and Management; Pilliod, D. S.; Bury, R. B.; Hyde, E. J.; Pearl, C. A.; Corn, P. S.

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Year Published: 2003

Fire and aquatic ecosystems of the western USA: Current knowledge and key questions

Understanding of the effects of wildland fire and fire management on aquatic and riparian ecosystems is an evolving field, with many questions still to be resolved. Limitations of current knowledge, and the certainty that fire management will continue, underscore the need to summarize available information. Integrating fire and fuels management...

Bisson, P.A.; Rieman, B.; Luce, C.; Hessburg, Paul F.; Lee, D.; Kershner, J.; Reeves, G.H.; Gresswell, Robert E.
Fire and aquatic ecosystems of the western USA: Current knowledge and key questions; 2003; Article; Journal; Forest Ecology and Management; Bisson, P. A.; Rieman, B.; Luce, C.; Hessburg, P. F.; Lee, D.; Kershner, J.; Reeves, G. H.; Gresswell, Robert E.

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Year Published: 2003

Genetic variation in black bears in Arkansas and Louisiana using microsatellite DNA markers

In the 1950s and 1960s, translocation projects reintroduced black bears (Ursus americanus) from Minnesota and Manitoba to Arkansas and Louisiana. Today, several geographically disconnected populations exist in Arkansas and Louisiana, but their origins are unclear. Some populations may represent a separate subspecies, U. a. luteolus, which is...

Csiki, Ildiki; Lam, Cynthia; Key, Audie; Coulter, Erica; Clark, Joseph D.; Pace, Richard M.; Smith, Kimberly G.; Rhoads, Douglas D.

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Year Published: 2003

Grizzly bear

The grizzly bear inspires fear, awe, and respect in humans to a degree unmatched by any other North American wild mammal. Like other bear species, it can inflict serious injury and death on humans and sometimes does. Unlike the polar bear (Ursus maritimus) of the sparsely inhabited northern arctic, however, grizzly bears still live in areas...

Feldhamer, G.; Thompson, B.; Chapman, J.; Schwartz, C.C.; Miller, S.D.; Haroldson, M.A.
Grizzly bear; 2003; Book chapter; BOOK; Wild Mammals of North America.; Schwartz, C. C.; Miller, S. D.; Haroldson, M. A.

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Year Published: 2003

Hatching success in salamanders and chorus frogs at two sites in Colorado, USA: Effects of acidic deposition and climate

The snowpack in the vicinity of the Mount Zirkel Wilderness Area is among the most acidic in the western United States. We analyzed water chemistry and examined hatching success in tiger salamanders and chorus frogs at ponds there and at nearby Rabbit Ears Pass (Dumont) to determine whether acid deposition affects amphibians or their breeding...

Muths, E.; Campbell, K.; Corn, P. S.
Hatching success in salamanders and chorus frogs at two sites in Colorado, USA: Effects of acidic deposition and climate; 2003; Article; Journal; Amphibia-Reptilia; Muths, E.; Campbell, D. H.; Corn, P. S.