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: 1220
The northern pike, a prized native but disastrous invasive: Chapter 14
As the chapters in this book describe, the northern pike Esox lucius Linneaus, 1758 is a fascinating fish that plays an important ecological role in structuring aquatic communities (chapter 8), has the capacity to aid lake restoration efforts (chapter 11), and contributes substantially to local economies, both as a highlysought after sport fish (chapter 12) and as a commercial fishing resource (ch
Authors
David Rutz, Robert L. Massengill, Adam J. Sepulveda, Kristine J. Dunker
Estimating population extinction thresholds with categorical classification trees for Louisiana black bears
Monitoring vulnerable species is critical for their conservation. Thresholds or tipping points are commonly used to indicate when populations become vulnerable to extinction and to trigger changes in conservation actions. However, quantitative methods to determine such thresholds have not been well explored. The Louisiana black bear (Ursus americanus luteolus) was removed from the list of threaten
Authors
Jared S. Laufenberg, Joseph D. Clark, Richard B. Chandler
Land use diversification and intensification on elk winter range in Greater Yellowstone: A framework and agenda for social-ecological research
Amenity migration describes the movement of peoples to rural landscapes and the transition toward tourism and recreation and away from production-oriented land uses (ranching, timber harvesting). The resulting mosaic of land uses and community structures has important consequences for wildlife and their management. This research note examines amenity-driven changes to social-ecological systems in
Authors
Julia Hobson Haggerty, Kathleen Epstein, Michael Stone, Paul Cross
A social–ecological perspective for riverscape management in the Columbia River Basin
Riverscapes are complex, landscape-scale mosaics of connected river and stream habitats embedded in diverse ecological and socioeconomic settings. Social–ecological interactions among stakeholders often complicate natural-resource conservation and management of riverscapes. The management challenges posed by the conservation and restoration of wild salmonid populations in the Columbia River Basin
Authors
Brian K. Hand, Courtney G. Flint, Chris A. Frissell, Clint C. Muhlfeld, Shawn P. Devlin, Brian P. Kennedy, Robert L. Crabtree, W. Arthur McKee, Gordon Luikart, Jack A. Stanford
Yellowstone grizzly bear investigations — Annual report of the Interagency Grizzly Bear Study Team 2017
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 2017. This report also contains a summary of grizzly bear management actions to address conflict situations. Annual reports of the IGBST summarize annual data collection. Because additional inform
Elk research efforts
Presented the history of the NC elk herd and summarized early research to determine the population dispersal and mortality rates, assess habitat use, and evaluate elk’s impact on the national park to estimate the probability of success in establishing a permanent elk population in the Great Smoky Mountains National Park (GSMNP). Gave an overview of a fiveyear elk population study beginning October
Authors
Joseph D. Clark
Adding value to monitoring efforts with environmental DNA
No abstract available.
Authors
Adam J. Sepulveda, Andrew M. Ray, Anna M. McKee
Evidence that recent warming is reducing upper Colorado River flows
The upper Colorado River basin (UCRB) is one of the primary sources of water for the western United States, and increasing temperatures likely will elevate the risk of reduced water supply in the basin. Although variability in water-year precipitation explains more of the variability in water-year UCRB streamflow than water-year UCRB temperature, since the late 1980s, increases in temperature in t
Authors
Gregory J. McCabe, David M. Wolock, Gregory T. Pederson, Connie A. Woodhouse, Stephanie A. McAfee
Using carbon dioxide in fisheries and aquatic invasive species management
To restore native fish populations, fisheries programs often depend on active removal of aquatic invasive species. Chemical removal can be an effective method of eliminating aquatic invasive species, but chemicals can induce mortality in nontarget organisms and persist in the environment. Carbon dioxide (CO2) is an emerging alternative to traditional chemical control agents because it has been dem
Authors
Hilary B. Treanor, Andrew M. Ray, Megan J. Layhee, Barnaby J. Watten, Jason A. Gross, Robert E. Gresswell, Molly A. H. Webb
Status and conservation of Yellowstone cutthroat trout in the Greater Yellowstone Area
No abstract available.
Authors
Robert K. Al-Chokhachy, Bradley Shepard, Jason Burckhardt, Scott Opitz, Dan Garren, Todd M. Koel, Lee M. Nelson
Application of synthetic scenarios to address water resource concerns: A management-guided case study from the Upper Colorado River Basin
Water managers are increasingly interested in better understanding and planning for projected resource impacts from climate change. In this management-guided study, we use a very large suite of synthetic climate scenarios in a statistical modeling framework to simultaneously evaluate how (1) average temperature and precipitation changes, (2) initial basin conditions, and (3) temporal characteristi
Authors
Stephanie A. McAfee, Gregory T. Pederson, Connie A. Woodhouse, Gregory J. McCabe
Linking spring phenology with mechanistic models of host movement to predict disease transmission risk
Disease models typically focus on temporal dynamics of infection, while often neglecting environmental processes that determine host movement. In many systems, however, temporal disease dynamics may be slow compared to the scale at which environmental conditions alter host space-use and accelerate disease transmission.Using a mechanistic movement modelling approach, we made space-use predictions o
Authors
Jerod Merkle, Paul C. Cross, Brandon M. Scurlock, Eric Cole, Alyson B. Courtemanch, Sarah Dewey, Matthew J. Kauffman