Northern Rocky Mountain Science Center

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: 987
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Year Published: 2020

Parsing complex terrain controls on mountain glacier response to climate forcing

Glaciers are a key indicator of changing climate in the high mountain landscape. Glacier variations across a mountain range are ultimately driven by regional climate forcing. However, changes also reflect local, topographically driven processes such as snow avalanching, snow wind-drifting, and radiation shading as well as the initial glacier...

Florentine, Caitlyn Elizabeth; Harper, Joel T.; Fagre, Daniel B.

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Year Published: 2020

Millennial-scale climate and human drivers of environmental change and fire activity in a dry, mixed-conifer forest of northwestern Montana

Warm summer temperatures and longer fire seasons are promoting larger, and in some cases, more fires that are severe in low- and mid-elevation, dry mixed-conifer forests of the Northern Rocky Mountains (NRM). Long-term historical fire conditions and human influence on past fire activity are not well understood for these topographically and...

McWethy, David B.; Alt, Mio; Argiriadis, Elana; Battistel, Dario; Everett, Richard G.; Pederson, Gregory T.

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Year Published: 2020

Black bear movement and food conditioning in an exurban landscape

Conflicts between humans and wildlife have become increasingly important challenges for resource managers along the urban‐wildland interface. Food conditioning (i.e., reliance by an animal on anthropogenic foods) of American black bears (Ursus americanus ) is related to conflict behavior (i.e., being bold or aggressive toward humans, consuming...

Braunstein, Jessica; Clark, Joseph D.; Williamson, Ryan H; Stiver, William H

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Year Published: 2020

Climate-induced expansions of invasive species in the Pacific Northwest, North America: A synthesis of observations and projections

Climate change may facilitate the expansion of non-native invasive species (NIS) in aquatic and terrestrial systems. However, empirical evidence remains scarce and poorly synthesized at scales necessary for effective management. We conducted a literature synthesis to assess the state of research on the observed and predicted effects of climate...

Gervais, Jennifer; Kovach, Ryan P.; Sepulveda, Adam J.; Al-Chokhachy, Robert K.; Giersch, J. Joseph; Muhlfeld, Clint C.

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Year Published: 2020

Dynamics, variability, and change in seasonal precipitation reconstructions for North America

Cool and warm season precipitation totals have been reconstructed on a gridded basis for North America using 439 tree-ring chronologies correlated with December-April totals and 547 different chronologies correlated with May-July totals. These discrete seasonal predictor chronologies are not significantly correlated with the alternate season and...

Stahle, David W.; Cook, Edward R; Burnette, Dorian J; Torbenson, Max C.A.; Howard, Ian M; Griffin, Daniel; Villanueva Diaz, Jose; Cook, Benjamin I.; Williams, Park A.; Watson, Emma; Sauchyn, David J.; Pederson, Neil; Woodhouse, Connie A.; Pederson, Gregory T.; Meko, David M.; Coulthard, Bethany; Crawford, Christopher J.

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Year Published: 2020

A call for global action to conserve native trout in the 21st century and beyond

Trout and char (hereafter, trout ) represent some of the more culturally, economically and ecologically important taxa of freshwater fishes worldwide (Kershner, Williams, Gresswell, & Lobón‐Cerviá, 2019a). Native to all continents in the Northern Hemisphere (as well as western Mediterranean Africa), trout belong to seven genera...

Dauwalter, Daniel C.; Duchi, Antonino; Epifanio, John; Gandolfi, A.J.; Gresswell, Robert E.; Juanes, Francis; Kershner, Jeffrey L.; Lobón-Cerviá, Javier; McGinnity, Philip; Meraner, Andreas; Mikheev, Pavel; Morita, Kentaro; Muhlfeld, Clint C.; Pinter, Kurt; Post, John; Unfer, Gunther; Vøllestad, Leif Asbjørn; Williams, Jack E.

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Year Published: 2020

Revealing migration and reproductive habitat of invasive fish under an active population suppression program

Endemic species face a variety of threats including predation from non‐native invaders. In some cases, however, invasive species can be managed by directly suppressing populations, and tracking technologies that allow researchers to identify movement patterns and aggregations representative of the population can facilitate suppression activities....

Gutowsky, Lee F. G.; Romine, Jason G.; Heredia, Nicholas A.; Bigelow, Patricia E.; Parsley, Michael J.; Sandstrom, Philip T.; Suski, Cory D.; Danylchuk, Andy J.; Cooke, Steven J.; Gresswell, Robert E.

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Year Published: 2020

Amphibian chytrid prevalence on boreal toads in SE Alaska and NW British Columbia: Tests of habitat, life stages, and temporal trends

Tracking and understanding variation in pathogens such as Batrachochytrium dendrobatidis ([Bd]), which causes amphibian chytridiomycosis and has caused population declines globally, is a priority for many land managers. However, there has been relatively little sampling of amphibian communities at high latitudes. We used skin swabs collected...

Hossack, Blake R.; Adams, Michael J.; Honeycutt, R Ken; Belt, Jami J; Pyare, S

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Year Published: 2020

A round-robin evaluation of the repeatability and reproducibility of environmental DNA assays for dreissenid mussels

Resource managers may be hesitant to make decisions based on environmental (e)DNA results alone since eDNA is an indirect method of species detection. One way to reduce the uncertainty of eDNA is to identify laboratory‐based protocols that ensure repeatable and reproducible results. We conducted a double‐blind round‐robin analysis of probe‐based...

Sepulveda, Adam J.; Hutchins, Patrick R.; Jackson, Craig; Ostberg, Carl; Laramie, Matthew; Amberg, Jon J.; Counihan, Timothy; Hoegh, Andrew B.; Pilliod, David

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Year Published: 2020

Co-occurence of Chiricahua leopard frogs (Lithobates chiricahuensis) with sunfish (Lepomis)

Invasive species are a major threat to the persistence of native species, particularly in systems where ephemeral aquatic habitats have been replaced by permanent water and predators, such as fish, have been introduced. Within the Altar Valley, Arizona, the invasive American bullfrog, Lithobates catesbeianus (formerly Rana...

Howell, Paige E.; Sigafus, Brent H.; Hossack, Blake R.; Muths, Erin L.

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Year Published: 2020

Parsing the effects of demography, climate, and management on recurrent brucellosis outbreaks in elk

1. Zoonotic pathogens can harm human health and well-being directly or by impacting livestock. Pathogens that spillover from wildlife can also impair conservation efforts if humans perceive wildlife as pests. Brucellosis, caused by the bacterium Brucella abortus, circulates in elk and bison herds of the Greater Yellowstone Ecosystem and poses a...

Cotterill, Gavin G.; Cross, Paul; Merkle, J. A.; Rogerson, JD; Scurlock, BM; Du Toit, Johan T.

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Year Published: 2020

Survival and conflict behavior of American black bears after rehabilitation

Wildlife agencies face difficult situations when orphaned or injured American black bear (Ursus americanus ) cubs (<12 months old) or yearlings (≥12 and <24 months old) are captured. One option is bear rehabilitation, the care and feeding of cubs or yearlings in a semi‐natural environment, followed by release. Unfortunately, the...

Blair, Coy D; Muller, Lisa I; Clark, Joseph D.; Stiver, William H