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: 1303
Mapped versus actual burned area within wildfire perimeters: Characterizing the unburned Mapped versus actual burned area within wildfire perimeters: Characterizing the unburned
For decades, wildfire studies have utilized fire occurrence as the primary data source for investigating the causes and effects of wildfire on the landscape. Fire occurrence data fall primarily into two categories: ignition points and perimeter polygons which are used to calculate a ‘burned area’ for a fire. However, understanding the relationships between climate and fire or between...
Authors
Carl H Key, James Lutz, Carl H. Key, Jonathan Kane, Jan W Van Wagtendonk
A risk-based approach to evaluating wildlife demographics for management in a changing climate: A case study of the Lewis's Woodpecker A risk-based approach to evaluating wildlife demographics for management in a changing climate: A case study of the Lewis's Woodpecker
Given the projected threat that climate change poses to biodiversity, the need for proactive response efforts is clear. However, integrating uncertain climate change information into conservation planning is challenging, and more explicit guidance is needed. To this end, this article provides a specific example of how a risk-based approach can be used to incorporate a species' response...
Authors
Erin Towler, Victoria A. Saab, Richard S. Sojda, Katherine Dickinson, Cindy L. Bruyere, Karen R. Newlon
Movement patterns, habitat use, and survival of Lahontan cutthroat trout in the Truckee River Movement patterns, habitat use, and survival of Lahontan cutthroat trout in the Truckee River
Habitat fragmentation, hybridization, and competition with nonnative salmonids are viewed as major threats to Lahontan cutthroat trout Oncorhynchus clarkii henshawi. Understanding Lahontan cutthroat trout behavior and survival is a necessary step in the reintroduction and establishment of naturally reproducing populations of Lahontan cutthroat trout. We used weekly radiotelemetry...
Authors
Alexander V. Alexiades, Mary M. Peacock, Robert K. Al-Chokhachy
Yellowstone bison genetics: let us move forward Yellowstone bison genetics: let us move forward
White and Wallen (2012) disagree with the conclusions and suggestions made in our recent assessment of population structure among Yellowstone National Park (YNP) bison based on 46 autosomal microsatellite loci in 661 animals (Halbert et al. 2012). First, they suggest that "the existing genetic substructure (that we observed) was artificially created." Specifically, they suggest that the
Authors
Natalie D. Halbert, Peter J.P. Gogan, Philip W. Hedrick, Jacquelyn M. Wahl, James N. Derr
Density and Genetic Structure of Black Bears in Coastal South Carolina Density and Genetic Structure of Black Bears in Coastal South Carolina
No abstract available.
Authors
J. Michael Drewry, Frank T. van Manen, Deanna M. Ruth
Assessing the impacts of river regulation on native bull trout (Salvelinus confluentus) and westslope cutthroat trout (Oncorhynchus clarkii lewisi) habitats in the upper Flathead River, Montana, USA Assessing the impacts of river regulation on native bull trout (Salvelinus confluentus) and westslope cutthroat trout (Oncorhynchus clarkii lewisi) habitats in the upper Flathead River, Montana, USA
Hungry Horse Dam on the South Fork Flathead River, Montana, USA, has modified the natural flow regimen for power generation, flood risk management and flow augmentation for anadromous fish recovery in the Columbia River. Concern over the detrimental effects of dam operations on native resident fishes prompted research to quantify the impacts of alternative flow management strategies on...
Authors
Clint C. Muhlfeld, Leslie A. Jones, D. Kotter, William J. Miller, Doran Geise, Joel Tohtz, Brian Marotz
Water-quality and geophysical data for three study sites within the Williston Basin and Prairie Pothole Region Water-quality and geophysical data for three study sites within the Williston Basin and Prairie Pothole Region
This report is a data release for water geochemical sample analyses and geophysical surveys for three sites within the Williston Basin and Prairie Pothole Region of Montana and North Dakota. The data collection sites and procedures are described.
Authors
Todd M. Preston, Bruce D. Smith, Joanna N. Thamke, Tara L. Chesley-Preston
RAD sequencing yields a high success rate for westslope cutthroat and rainbow trout species-diagnostic SNP assays RAD sequencing yields a high success rate for westslope cutthroat and rainbow trout species-diagnostic SNP assays
Hybridization with introduced rainbow trout threatens most native westslope cutthroat trout populations. Understanding the genetic effects of hybridization and introgression requires a large set of high-throughput, diagnostic genetic markers to inform conservation and management. Recently, we identified several thousand candidate single-nucleotide polymorphism (SNP) markers based on RAD...
Authors
Stephen J. Amish, Paul A. Hohenlohe, Sally Painter, Robb F. Leary, Clint C. Muhlfeld, Fred W. Allendorf, Gordon Luikart
Examining spring wet slab and glide avalanche occurrence along the Going-to-the-Sun Road corridor, Glacier National Park, Montana, USA Examining spring wet slab and glide avalanche occurrence along the Going-to-the-Sun Road corridor, Glacier National Park, Montana, USA
Wet slab and glide snow avalanches are dangerous and yet can be particularly difficult to predict. Wet slab and glide avalanches are presumably triggered by free water moving through the snowpack and the subsequent interaction with layer or ground interfaces, and typically occur in the spring during warming and subsequent melt periods. In Glacier National Park (GNP), Montana, both types...
Authors
Erich H. Peitzsch, Jordy Hendrikx, Daniel B. Fagre, Blase Reardon
Climate change and infectious disease dynamics Climate change and infectious disease dynamics
No abstract available.
Authors
Raina K. Plowright, Paul C. Cross, Gary Tabor, Emily S. Almberg, Leslie Bienen, Peter J. Hudson
Genetic population substructure in bison at Yellowstone National Park Genetic population substructure in bison at Yellowstone National Park
The Yellowstone National Park bison herd is 1 of only 2 populations known to have continually persisted on their current landscape since pre-Columbian times. Over the last century, the census size of this herd has fluctuated from around 100 individuals to over 3000 animals. Previous studies involving radiotelemetry, tooth wear, and parturition timing provide evidence of at least 2...
Authors
Natalie D. Halbert, Peter J. Gogan, Philip W. Hedrick, Jacquelyn M. Wahl, James N. Derr
Assessing the status and trend of bat populations across broad geographic regions with dynamic distribution models Assessing the status and trend of bat populations across broad geographic regions with dynamic distribution models
Bats face unprecedented threats from habitat loss, climate change, disease, and wind power development, and populations of many species are in decline. A better ability to quantify bat population status and trend is urgently needed in order to develop effective conservation strategies. We used a Bayesian autoregressive approach to develop dynamic distribution models for Myotis lucifugus...
Authors
Thomas J. Rodhouse, Patricia C. Ormsbee, Kathryn M. Irvine, Lee A. Vierling, Joseph M. Szewczak, Kerri T. Vierling