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: 1308
Yellowstone grizzly bear investigations — Annual report of the Interagency Grizzly Bear Study Team 2016 Yellowstone grizzly bear investigations — Annual report of the Interagency Grizzly Bear Study Team 2016
This Annual Report summarizes results of grizzly bear (Ursus arctos) monitoring and research conducted in the Greater Yellowstone Ecosystem (GYE) by the Interagency Grizzly Bear Study Team (IGBST) during 2016. The report also contains a summary of grizzly bear management actions to address conflict situations.
Extending the habitat concept to the airspace Extending the habitat concept to the airspace
Habitat is one of the most familiar and fundamental concepts in the fields of ecology, animal behavior, and wildlife conservation and management. Humans interact with habitats through their senses and experiences and education to such a degree that their perceptions of habitat have become second nature. For this reason, it may be difficult at first to accept the airspace as habitat, an...
Authors
Robert H. Diehl, Anna C. Peterson, Rachel T. Bolus, Douglas H. Johnson
Species account: Lepus townsendii (White-tailed jackrabbit) Species account: Lepus townsendii (White-tailed jackrabbit)
No abstract available.
Authors
Erik A. Beever
Species account: Lepus californicus (Black-tailed jackrabbit) Species account: Lepus californicus (Black-tailed jackrabbit)
No abstract available.
Authors
Erik A. Beever
Species account: Ochotona princeps (American pika) Species account: Ochotona princeps (American pika)
No abstract available.
Authors
Erik A. Beever, Chittaranjan Ray, Andrew T. Smith
Species account: Sylvilagus nuttallii (Mountain cottontail) Species account: Sylvilagus nuttallii (Mountain cottontail)
No abstract available.
Authors
Erik A. Beever, Eveline A. Larrucea
The waterfall paradox: How knickpoints disconnect hillslope and channel processes, isolating salmonid populations in ideal habitats The waterfall paradox: How knickpoints disconnect hillslope and channel processes, isolating salmonid populations in ideal habitats
Waterfalls create barriers to fish migration, yet hundreds of isolated salmonid populations exist above barriers and have persisted for thousands of years in steep mountainous terrain. Ecological theory indicates that small isolated populations in disturbance-prone landscapes are at greatest risk of extirpation because immigration and recolonization are not possible. On the contrary...
Authors
Christine May, Joshua J. Roering, Kyle Snow, Kitty Griswold, Robert E. Gresswell
Space use and habitat selection by resident and transient red wolves (Canis rufus) Space use and habitat selection by resident and transient red wolves (Canis rufus)
Recovery of large carnivores remains a challenge because complex spatial dynamics that facilitate population persistence are poorly understood. In particular, recovery of the critically endangered red wolf (Canis rufus) has been challenging because of its vulnerability to extinction via human-caused mortality and hybridization with coyotes (Canis latrans). Therefore, understanding red...
Authors
Joseph W. Hinton, Christine Proctor, Marcella J. Kelly, Frank T. van Manen, Michael R. Vaughan, Michael J. Chamberlain
Predictors of current and longer-term patterns of abundance of American pikas (Ochotona princeps) across a leading-edge protected area Predictors of current and longer-term patterns of abundance of American pikas (Ochotona princeps) across a leading-edge protected area
American pikas (Ochotona princeps) have been heralded as indicators of montane-mammal response to contemporary climate change. Pikas no longer occupy the driest and lowest-elevation sites in numerous parts of their geographic range. Conversely, pikas have exhibited higher rates of occupancy and persistence in Rocky Mountain and Sierra Nevada montane ‘mainlands’. Research and monitoring...
Authors
Lucas Moyer-Horner, Erik A. Beever, Douglas H. Johnson, Mark Beil, Jami Belt
Survival estimates for reintroduced populations of the Chiricahua Leopard Frog (Lithobates chiricahuensis) Survival estimates for reintroduced populations of the Chiricahua Leopard Frog (Lithobates chiricahuensis)
Global amphibian declines have been attributed to a number of factors including disease, invasive species, habitat degradation, and climate change. Reintroduction is one management action that is commonly used with the goal of recovering imperiled species. The success of reintroductions varies widely, and evaluating their efficacy requires estimates of population viability metrics, such...
Authors
Paige E. Howell, Blake R. Hossack, Erin L. Muths, Brent H. Sigafus, Richard B. Chandler
Topographic and fire weather controls of fire refugia in forested ecosystems of northwestern North America Topographic and fire weather controls of fire refugia in forested ecosystems of northwestern North America
Fire refugia, sometimes referred to as fire islands, shadows, skips, residuals, or fire remnants, are an important element of the burn mosaic, but we lack a quantitative framework that links observations of fire refugia from different environmental contexts. Here, we develop and test a conceptual model for how predictability of fire refugia varies according to topographic complexity and...
Authors
Meg A. Krawchuk, Sandra L. Haire, Jonathan D. Coop, Marc-André Parisien, Ellen Whitman, Geneva W. Chong, Carol Miller
Using structure from motion photogrammetry to examine glide snow avalanches Using structure from motion photogrammetry to examine glide snow avalanches
Structure from Motion (SfM), a photogrammetric technique, has been used extensively and successfully in many fields including geosciences over the past few years to create 3D models and high resolution digital elevation models (DEMs) from aerial or oblique photographs. SfM has recently been used in a limited capacity in snow avalanche research and shows promise as a tool for broader...
Authors
Erich H. Peitzsch, Jordy Hendrikx, Daniel B. Fagre