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FORT scientists have produced more than 2000 peer reviewed publications that are registered in the USGS Publications Warehouse, along with many others prior to their work at the USGS or in conjunction with other government agencies.

Filter Total Items: 2380

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January 1, 1998

Elk reintroductions Elk reintroductions

Rocky Mountain elk are native to northcentral New Mexico, including the Jemez Mountains, whereas a different subspecies, Merriam’s elk, inhabited southern New Mexico, east-central Arizona, and the Mexican border region (Hall 1981). Merriam’s elk went extinct around 1900 in New Mexico, and native Rocky Mountain elk were extirpated by 1909 (Findley et al. 1975). Although elk were known to...

Authors

Craig D. Allen

Ecosystems Mission Area, Fort Collins Science Center

January 1, 1998

Information-theoretic model selection and model averaging for closed-population capture-recapture studies Information-theoretic model selection and model averaging for closed-population capture-recapture studies

Specification of an appropriate model is critical to valid statistical inference. Given the “true model” for the data is unknown, the goal of model selection is to select a plausible approximating model that balances model bias and sampling variance. Model selection based on information criteria such as AIC or its variant AICc, or criteria like CAIC, has proven useful in a variety of...

Authors

Thomas R. Stanley, Kenneth P. Burnham

Ecosystems Mission Area, Fort Collins Science Center

January 1, 1998

Responses of riparian cottonwoods to alluvial water-table declines Responses of riparian cottonwoods to alluvial water-table declines

No abstract available.

Authors

G.T. Auble, M. L. Scott, P.B. Shafroth, G. C. Lines

Ecosystems Mission Area, Fort Collins Science Center

January 1, 1998

Foreword Foreword

No abstract available.

Authors

Jonathan M. Friedman, Michael L. Scott, Duncan Patten

Ecosystems Mission Area, Fort Collins Science Center

January 1, 1998

Evaluating landscape health: Integrating societal goals and biophysical process Evaluating landscape health: Integrating societal goals and biophysical process

Evaluating landscape change requires the integration of the social and natural sciences. The social sciences contribute to articulating societal values that govern landscape change, while the natural sciences contribute to understanding the biophysical processes that are influenced by human activity and result in ecological change. Building upon Aldo Leopold's criteria for landscape...

Authors

D.J. Rapport, C. Gaudet, J.R. Karr, Jill Baron, C. Bohlen, W. Jackson, Bruce Jones, R.J. Naiman, B. Norton, M. M. Pollock

Ecosystems Mission Area, Fort Collins Science Center

January 1, 1998

The captive environment and reintroduction: the black-footed ferret as a case study with comments on other taxa The captive environment and reintroduction: the black-footed ferret as a case study with comments on other taxa

No abstract available.

Authors

B. J. Miller, D. E. Biggins, Astrid Vargas, M. Hutchins, L. Hanebury, J. L. Godbey, Gerardo Ceballos, S. Anderson, J. L. Oldemeyer, F. L. Knopf

Ecosystems Mission Area, Fort Collins Science Center

January 1, 1998

Viewpoint: Sustainability of piñon-juniper ecosystems - A unifying perspective of soil erosion thresholds Viewpoint: Sustainability of piñon-juniper ecosystems - A unifying perspective of soil erosion thresholds

Many pinon-juniper ecosystem in the western U.S. are subject to accelerated erosion while others are undergoing little or no erosion. Controversy has developed over whether invading or encroaching pinon and juniper species are inherently harmful to rangeland ecosystems. We developed a conceptual model of soil erosion in pinon-jumper ecosystems that is consistent with both sides of the...

Authors

David W. Davenport, D.D. Breshears, B.P. Wilcox, Craig D. Allen

Ecosystems Mission Area, Fort Collins Science Center

December 31, 1997

Experimental methods for restoring boreal toad populations in Rocky Mountain National Park Experimental methods for restoring boreal toad populations in Rocky Mountain National Park

No abstract available.

Authors

Therese L. Johnson, Erin L. Muths, P. Stephen Corn

Ecosystems Mission Area, Fort Collins Science Center

August 1, 1997

619 ecosystem management projects 619 ecosystem management projects

No abstract available.

Authors

Thomas R. Stanley, Joel T. Heinen, James R. Strittholt, Philip M. Fearnside, Gillian Cooper-Driver

Ecosystems Mission Area, Fort Collins Science Center

July 1, 1997

Riparian cottonwood response to watertable declines Riparian cottonwood response to watertable declines

No abstract available.

Authors

M. L. Scott, Patrick Shafroth, G.T. Auble, E. D. Eggleston

Ecosystems Mission Area, Fort Collins Science Center

May 1, 1997

Survey and assessment of amphibian populations in Rocky Mountain National Park Survey and assessment of amphibian populations in Rocky Mountain National Park

We conducted surveys in Rocky Mountain National Park, Colorado for amphibians in 1987-1994. Four species, Ambystoma tigrinum, Bufo boreas, Pseudacris maculata, and Rana sylvatica, were recorded. Pseudacris maculata was the most widely distributed and abundant species in the Park. Two populations of E maculata were estimated to contain 161 and 136 breeding males in 1988. There was no...

Authors

Paul Stephen Corn, Michael L. Jennings, Erin L. Muths

Ecosystems Mission Area, Fort Collins Science Center

May 1, 1997

Flood dependency of cottonwood establishment along the Missouri River, Montana, USA Flood dependency of cottonwood establishment along the Missouri River, Montana, USA

Flow variability plays a central role in structuring the physical environment of riverine ecosystems. However, natural variability in flows along many rivers has been modified by water management activities. We quantified the relationship between flow and establishment of the dominant tree (plains cottonwood, Populus deltoides subsp. monilifera) along one of the least hydrologically...

Authors

Michael L. Scott, Gregor T. Auble, Jonathan M. Friedman

Ecosystems Mission Area, Fort Collins Science Center