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: 996
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Year Published: 2001

Summer habitat use by Columbia River redband trout in the Kootenai River drainage, Montana

The reported decline in the abundance, distribution, and genetic diversity of Columbia River redband trout Oncorhynchus mykiss gairdneri (a rainbow trout subspecies) has prompted fisheries managers to investigate their habitat requirements, identify critical habitat, and develop effective conservation and recovery programs. We analyzed the...

Muhlfeld, Clint C.; Bennett, David H.

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Year Published: 2001

Whitebark pine, grizzly bears, and red squirrels

Appropriately enough, much of this book is devoted to discussing management challenges and techniques. However, the impetus for action—the desire to save whitebark pine (Pinus albicaulis) - necessarily arises from the extent to which we cherish it for its beauty and its connections with other things that we value. Whitebark pine is at the hub of a...

Tomback, Diana F.; Arno, Stephen F.; Keane, Robert E.; Mattson, David J.; Kendall, Katherine C.; Reinhart, Daniel P.
Whitebark pine, grizzly bears, and red squirrels; 2001; Book chapter; Book chapter; Whitebark pine communities: ecology and restoration; Mattson, D.J.; Kendall, K.C.; Reinhart, D.P.

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Year Published: 2001

Perspectives from the Aldo Leopold Wilderness Research Institute: Amphibians and wilderness

The decline of amphibian species has emerged as a major global conservation issue in the last decade. Last year, the Department of the Interior (DOI) initiated a major national initiative to detect trends in amphibian populations and research the causes of declines. The program, conducted principally by the U.S. Geological Survey (USGS),...

Corn, Paul Stephen

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Year Published: 2001

Freshwater forcing of abrupt climate change during the last glaciation

Large millennial-scale fluctuations of the southern margin of the North American Laurentide Ice Sheet occurred during the last deglaciation, when the margin was located between about 43° and 49°N. Fluctuations of the ice margin triggered episodic increases in the flux of freshwater to the North Atlantic by rerouting continental runoff from the...

Clark, Peter U.; Marshall, Shawn J.; Clarke, Garry K. C.; Hostetler, Steven W.; Licciardi, Joseph M.; Teller, James T.

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Year Published: 2001

Fall and winter habitat use and movement by Columbia River redband trout in a small stream in Montana

We used radiotelemetry to quantify the movements and habitat use of resident adult Columbia River redband trout Oncorhynchus mykiss gairdneri (hereafter, redband trout) from October to December 1997 in South Fork Callahan Creek, a third‐order tributary to Callahan Creek in the Kootenai River drainage in northwestern Montana. All redband...

Muhlfeld, Clint C.; Bennett, David H.; Marotz, B.

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Year Published: 2001

Effects of winter road grooming on bison in YNP

The effects of winter recreation—specifically snowmobiling—on wildlife in Yellowstone National Park (YNP) have become high-profile management issues. The road grooming needed to support oversnow travel in YNP is also being examined for its effects on bison (Bison bison) ecology. Data were collected from November 1997 through May 1998...

Bjornlie, Daniel D.; Garrott, R.A.

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Year Published: 2001

Negative binomial models for abundance estimation of multiple closed populations

Counts of uniquely identified individuals in a population offer opportunities to estimate abundance. However, for various reasons such counts may be burdened by heterogeneity in the probability of being detected. Theoretical arguments and empirical evidence demonstrate that the negative binomial distribution (NBD) is a useful characterization for...

Boyce, Mark S.; MacKenzie, Darry I.; Manly, Bryan F.J.; Haroldson, Mark A.; Moody, David W.

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Year Published: 2001

Cosmogenic 3He and 10Be chronologies of the late Pinedale northern Yellowstone ice cap, Montana, USA

Cosmogenic 3He and 10Be ages measured on surface boulders from the moraine sequence deposited by the northern outlet glacier of the Yellowstone ice cap indicate that the outlet glacier reached its terminal position at 16.5 ± 0.4 3He ka and 16.2 ± 0.3 10Be ka, respectively. Concordance of these ages supports the scaled...

Licciardi, Joseph M.; Clark, P.U.; Brook, Edward J.; Pierce, Kenneth L.; Kurz, Mark D.; Elmore, David; Sharma, Pankaj

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Year Published: 2001

The introduction of nonnative fish into wilderness lakes: Good intentions, conflicting mandates, and unintended consequences

Because they have the potential to provide the best remaining standards of relatively unmodified landscapes, protected areas in North America (such as wilderness areas and national parks) have tremendous ecological and scientific value (Cole and Landres 1996). Although the montane ecosystems of western North America are particularly well...

Knapp, Roland A.; Corn, Paul Stephen; Schindler, Daniel E.

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Year Published: 2001

A plague of frogs: The horrifying true story

No abstract available

Corn, Paul Stephen

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Year Published: 2001

Florida panther

No abstract available.

Dickson, James G.; Clark, Joseph D.

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Year Published: 2001

Dispersal ecology of lodgepole pine (Pinus contorta Dougl.) in its native environment as related to Swedish forestry

Lodgepole pine (Pinus contorta Dougl.) covers extensive areas of the mountains of western North America. It has evolved into four subspecies, each adapted to slightly different environmental conditions. All are adapted to reproduce following fire. Subspecies latifolia is the most extensive and economically important in North America. Serotiny is...

Despain, Don G.