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: 1216
Bison conservation initiative: Bison conservation genetics workshop: Report and recommendations
One of the first outcomes of the Department of the Interior (DOI) Bison Conservation Initiative was the Bison Conservation Genetics Workshop held in Nebraska in September 2008. The workshop brought together scientists from government agencies and non-governmental organizations with professional population geneticists to develop guidance for the genetic management of the federal bison herds. The sc
Authors
Peter J. Gogan, Peter Dratch
Noninvasive methods for monitoring bear population trends
The U.S. Geological Survey began a grizzly bear research project in 2009 in the Northern Continental Divide Ecosystem (NCDE) of northwestern Montana. This work uses hair collection and DNA analysis methods similar to those used in the 2004 Northern Divide Grizzly Bear Project. However, instead of producing a snapshot of population size, the objectives of this new work are to estimate population gr
Authors
Katherine Kendall
Hazards affecting grizzly bear survival in the Greater Yellowstone Ecosystem
During the past 2 decades, the grizzly bear (Ursus arctos) population in the Greater Yellowstone Ecosystem (GYE) has increased in numbers and expanded its range. Early efforts to model grizzly bear mortality were principally focused within the United States Fish and Wildlife Service Grizzly Bear Recovery Zone, which currently represents only about 61% of known bear distribution in the GYE. A more
Authors
Charles C. Schwartz, Mark A. Haroldson, Gary C. White
Current status of brown bears in the Manasalu Conservation Area, Nepal
Although brown bears (Ursus arctos) are rare in the Himalayan region, populations have been documented in alpine habitats of Pakistan and India. Brown bears were once known to exist in both Nepal and Bhutan, but current information on their numbers and distributions was lacking. We document the presence of brown bears in the Manasalu Conservation Area (MCA) in Nepal using field surveys and intervi
Authors
Achyut Aryal, S. Sathyakumar, Charles C. Schwartz
Ecological responses to contemporary climate change within species, communities, and ecosystems
No abstract available.
Authors
Jerrold L. Belant, Erik A. Beever, John E. Gross, Joshua J. Lawler
Genetic analysis of individual origins supports isolation of grizzly bears in the Greater Yellowstone Ecosystem
The Greater Yellowstone Ecosystem (GYE) supports the southernmost of the 2 largest remaining grizzly bear (Ursus arctos) populations in the contiguous United States. Since the mid-1980s, this population has increased in numbers and expanded in range. However, concerns for its long-term genetic health remain because of its presumed continued isolation. To test the power of genetic methods for detec
Authors
Mark A. Haroldson, Charles Schwartz, Katherine C. Kendall, Kerry A. Gunther, David S. Moody, Kevin L. Frey, David Paetkau
Brucellosis in cattle, bison, and elk: Management conflicts in a society with diverse values
No abstract available.
Authors
P.C. Cross, Michael R. Ebinger, V. Patrek, Rick Wallen
Linking process to pattern: estimating spatiotemporal dynamics of a wildlife epidemic from cross‐sectional data
Underlying dynamic event processes unfolding in continuous time give rise to spatiotemporal patterns that are sometimes observable at only a few discrete times. Such event processes may be modulated simultaneously over several spatial (e.g., latitude and longitude) and temporal (e.g., age, calendar time, and cohort) dimensions. The ecological challenge is to understand the dynamic latent processes
Authors
Dennis M. Heisey, Erik E. Osnas, Paul C. Cross, Damien O. Joly, Julia A. Langenberg, Michael W. Miller
New software methods in radar ornithology using WSR-88D weather data and potential application to monitoring effects of climate change on bird migration
Radar ornithology has provided tools for studying the movement of birds, especially related to migration. Researchers have presented qualitative evidence suggesting that birds, or at least migration events, can be identified using large broad scale radars such as the WSR-88D used in the NEXRAD weather surveillance system. This is potentially a boon for ornithologists because such data cover a larg
Authors
Reginald Mead, John Paxton, Richard S. Sojda
Functional linear models to test for differences in prairie wetland hydraulic gradients
Functional data analysis provides a framework for analyzing multiple time series measured frequently in time, treating each series as a continuous function of time. Functional linear models are used to test for effects on hydraulic gradient functional responses collected from three types of land use in Northeastern Montana at fourteen locations. Penalized regression-splines are used to estimate th
Authors
Mark C. Greenwood, Richard S. Sojda, Todd M. Preston
A proposed lexicon of terms and concepts for human-bear management in North America
We believe that communication within and among agency personnel in the United States and Canada about the successes and failures of their human–bear (Ursidae) management programs will increase the effectiveness of these programs and of bear research. To communicate more effectively, we suggest agencies clearly define terms and concepts used in human–bear management and use them in a consistent man
Authors
John B. Hopkins, Stephen Herrero, Richard T. Shideler, Kerry A. Gunther, Charles C. Schwartz, Steven T. Kalinowski
Using GIS and Google Earth for the creation of the Going-to-the-Sun Road Avalanche Atlas, Glacier National Park, Montana, USA
Snow avalanche paths are key geomorphologic features in Glacier National Park, Montana, and an important component of mountain ecosystems: they are isolated within a larger ecosystem, they are continuously disturbed, and they contain unique physical characteristics (Malanson and Butler, 1984). Avalanches impact subalpine forest structure and function, as well as overall biodiversity (Bebi et al.,
Authors
Erich H. Peitzsch, Daniel B. Fagre, Mark Dundas