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: 1316
Past warm periods provide vital benchmarks for understanding the future of the Greater Yellowstone Ecosystem Past warm periods provide vital benchmarks for understanding the future of the Greater Yellowstone Ecosystem
No abstract available.
Authors
Cathy Whitlock, Steven W. Hostetler
Perspectives and challenges for the use of radar in biological conservation Perspectives and challenges for the use of radar in biological conservation
Radar is at the forefront for the study of broad‐scale aerial movements of birds, bats and insects and related issues in biological conservation. Radar techniques are especially useful for investigating species which fly at high altitudes, in darkness, or which are too small for applying electronic tags. Here, we present an overview of radar applications in biological conservation and...
Authors
Ommo Huppop, Michal Ciach, Robert H. Diehl, Don Reynolds, Phillip Stepanian, Myles Menz
Congruent population genetic structure but differing depths of divergence for three alpine stoneflies with similar ecology and geographic distributions Congruent population genetic structure but differing depths of divergence for three alpine stoneflies with similar ecology and geographic distributions
Comparative population genetic studies provide a powerful means for assessing the degree to which evolutionary histories may be congruent among taxa while also highlighting the potential for cryptic diversity within existing species.In the Rocky Mountains, three confamilial stoneflies (Zapada glacier , Lednia tumana , and Lednia tetonica ; Plecoptera, Nemouridae) occupy cold alpine...
Authors
Scott Hotaling, J. Joseph Giersch, Debra S. Finn, Lusha M. Tronstad, Steve Jordan, Larry Serpa, Ronald Call, Clint C. Muhlfeld, David W. Weisrock
Development of new information to inform fish passage decisions at the Yale and Merwin hydro projects on the Lewis River, Washington—Final report, 2018 Development of new information to inform fish passage decisions at the Yale and Merwin hydro projects on the Lewis River, Washington—Final report, 2018
The reintroduction of extirpated salmonids to historically occupied areas is becoming increasingly common as a conservation and recovery strategy. Often, reintroductions are implemented after the factors that originally led to species extirpation have been reduced, eliminated, or mitigated. For anadromous Oncorhynchus spp. (Pacific salmon) and O. mykiss (steelhead), addressing barriers...
Authors
Robert K. Al-Chokhachy, Christopher L. Clark, Mark H. Sorel, David A. Beauchamp
Impacts of nonnative Brown Trout on Yellowstone Cutthroat Trout in a tributary stream Impacts of nonnative Brown Trout on Yellowstone Cutthroat Trout in a tributary stream
Nonnative trout are a considerable threat to native salmonids, yet our understanding of the mechanisms behind interspecific interactions remains limited. We evaluated the impacts of nonnative Brown Trout Salmo salar on a population of Yellowstone Cutthroat Trout Oncorhynchus clarkii bouvieri in Montana. We contrasted diets, growth, and survival of Yellowstone Cutthroat Trout occurring in...
Authors
Robert K. Al-Chokhachy, Adam J. Sepulveda
No flood effect on recruitment of a small Louisiana black bear population No flood effect on recruitment of a small Louisiana black bear population
A flood event in 2011 had minor impacts on apparent survival and movement probabilities of a small, isolated population of Louisiana black bears (Ursus americanus luteolus) in the Upper Atchafalaya River Basin, Louisiana, USA. However, the potential effects of the flood on recruitment of juveniles into the population, then listed as threatened under the United States Endangered Species...
Authors
Joseph D. Clark, Kaitlin C. O’Connell-Goode, Carrie L. Lowe, Sean M. Murphy, Sutton C. Maehr, Maria M. Davidson, Jared S. Laufenberg
Extreme value-based methods for modeling elk yearly movements Extreme value-based methods for modeling elk yearly movements
Species range shifts and the spread of diseases are both likely to be driven by extreme movements, but are difficult to statistically model due to their rarity. We propose a statistical approach for characterizing movement kernels that incorporate landscape covariates as well as the potential for heavy-tailed distributions. We used a spliced distribution for distance travelled paired...
Authors
Dhanushi A. Wijeyakulasuriya, Ephraim M. Hanks, Benjamin A. Shaby, Paul C. Cross
Keeping the crown of the continent connected: An interagency US2 connectivity workshop report Keeping the crown of the continent connected: An interagency US2 connectivity workshop report
At over 2.5 million acres, Glacier National Park and the Bob Marshall Wilderness complex form one of the largest protected areas in the continental United States. Straddling the Continental Divide, these two areas form a vital linkage between vast areas of public land to the south towards Yellowstone, and contiguous protected areas north of the US-Canada border. However, US Highway 2...
Authors
John S. Waller, Tabitha A. Graves
Change in dominance determines herbivore effects on plant biodiversity Change in dominance determines herbivore effects on plant biodiversity
Herbivores alter plant biodiversity (species richness) in many of the world’s ecosystems, but the magnitude and the direction of herbivore effects on biodiversity vary widely within and among ecosystems. One current theory predicts that herbivores enhance plant biodiversity at high productivity but have the opposite effect at low productivity. Yet, empirical support for the importance of...
Authors
Sally E. Koerner, Melinda D. Smith, Deron E. Burkepile, Niall P. Hanan, Meghan L. Avolio, Scott L. Collins, Alan K. Knapp, Nathan P. Lemoine, Elisabeth J. Forrestel, Stephanie Eby, Dave I. Thompson, Gerardo A. Aguado-Santacruz, John P. Anderson, T. Michael Anderson, Ayana Angassa, Sumanta Bagchi, Elisabeth S. Bakker, Gary Bastin, Lauren E. Baur, Karen H. Beard, Erik A. Beever, Patrick J. Bohlen, Elizabeth H. Boughton, Don Canestro, Ariela Cesa, Enrique Chaneton, Jimin Cheng, Carla M. D’Antonio, Claire Deleglise, Fadiala Dembele, Josh Dorrough, David J. Eldridge, Barbara Fernandez-Going, Silvia Fernandez-Lugo, Lauchlan H. Fraser, Bill Freedman, Gonzalo Garcia-Salgado, Jacob R. Goheen, Liang Guo, Sean Husheer, Moussa Karembe, Johannes M. H. Knops, Tineke Kraaij, Andrew Kulmatiski, Minna-Maarit Kytoviita, Felipe Lezama, Gregory Loucougaray, Alejandro Loydi, Daniel G. Milchunas, Suzanne J. Milton, John W. Morgan, Claire Moxham, Kyle C. Nehring, Han Olff, Todd M. Palmer, Salvador Rebollo, Corinna Riginos, Anita C. Risch, Marta Rueda, Mahesh Sankaran, Takehiro Sasaki, Kathryn A. Schoenecker, Nick L. Schultz, Martin Schutz, Angelika Schwabe, Frances Siebert, Christian Smit, Karen A. Stahlheber, Christian Storm, Dustin J. Strong, Jishuai Su, Yadugiri V. Tiruvaimozhi, Claudia Tyler, James Val, Martijn L. Vandegehuchte, Kari E. Veblen, Lance Vermeire, David Ward, Jianshuang Wu, Truman P. Young, Qiang Yu, Tamara J. Zelikova
Estimating the risk of elk-to-livestock brucellosis transmission in Montana Estimating the risk of elk-to-livestock brucellosis transmission in Montana
Wildlife reservoirs of infectious disease are a major source of human-wildlife conflict because of the risk of potential spillover associated with commingling of wildlife and livestock. In Montana, the presence of brucellosis (Brucella abortus) in free-ranging elk (Cervus canadensis) populations is of significant management concern because of the risk of disease transmission from elk to...
Authors
Nathaniel D. Rayl, Kelly Proffitt, Emily S. Almberg, Jennifer D. Jones, Jerod Merkle, Justin A. Gude, Paul C. Cross
Hidden cost of disease in a free‐ranging ungulate: brucellosis reduces mid‐winter pregnancy in elk Hidden cost of disease in a free‐ranging ungulate: brucellosis reduces mid‐winter pregnancy in elk
Demonstrating disease impacts on the vital rates of free‐ranging mammalian hosts typically requires intensive, long‐term study. Evidence for chronic pathogens affecting reproduction but not survival is rare, but has the potential for wide‐ranging effects. Accurately quantifying disease‐associated reductions in fecundity is important for advancing theory, generating accurate predictive...
Authors
Gavin G. Cotterill, Paul C. Cross, Arthur D. Middleton, Jared D. Rogerson, Brandon Scurlock, Johan T. Du Toit
Effects of climate-related stream factors on patterns of individual summer growth of Cutthroat Trout Effects of climate-related stream factors on patterns of individual summer growth of Cutthroat Trout
Coldwater fishes are sensitive to abiotic and biotic stream factors, which can be influenced by climate. Distributions of inland salmonids in North America have declined significantly, with many of the current strongholds located in small headwater systems that may serve as important refugia as climate change progresses. We investigated the effects of discharge, stream temperature, trout...
Authors
Patrick Uthe, Robert K. Al-Chokhachy, Bradley Shepard, Alexander V. Zale, Jeffrey L. Kershner