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: 2021

Upper Colorado River Basin 20th century droughts under 21st century warming: Plausible scenarios for the future

This study builds on a collaboration with a water resource management community of practice in the Upper Colorado River Basin to develop scenarios of future drought and assess impacts on water supply reliability. Water managers are concerned with the impacts of warming on water year streamflow, but uncertainties in projections of climate make the...

Woodhouse, Connie A.; Smith, Rebecca M.; McAfee, Stephanie A.; Pederson, Gregory T.; McCabe, Gregory J.; Miller, W. Paul; Csank, Adam

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Year Published: 2021

High elevation ice patch documents Holocene climate variability in the northern Rocky Mountains

Paleoclimate records from ice cores generally are considered to be the most direct indicators of environmental change, but are rare from mid-latitude, continental regions such as the western United States. High-elevation ice patches are known to be important archaeological archives in alpine regions and potentially could provide records important...

Chellman, Nathan J.; Pederson, Gregory T.; Lee, Craig; McWethy, Dave; Pusman, Kathryn; Stone, Jeffery R.; Brown, Sabrina R.; McConnell, Joseph R.

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Year Published: 2021

It’s complicated…environmental DNA as a predictor of trout and char abundance in streams

The potential to provide inferences about fish abundance from environmental (e)DNA samples has generated great interest. However, the accuracy of these abundance estimates is often low and variable across species and space. A plausible refinement is the use of common aquatic habitat monitoring data to account for attributes that influence eDNA...

Sepulveda, Adam J.; Al-Chokhachy, Robert; Laramie, Matthew; Crapster, Kyle; Knotek, Ladd; Miller, Brian T.; Zale, Alexander V.; Pilliod, David

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Year Published: 2021

Group density, disease, and season shape territory size and overlap of social carnivores

1. The spatial organization of a population can influence the spread of information, behaviour, and pathogens. Territory size and territory overlap, components of spatial organization, provide key information as these metrics may be indicators of habitat quality, resource dispersion, contact rates, and environmental risk (e.g., indirectly...

Brandell, E. E.; Fountain-Jones, Nicholas M.; Gilbertson, Marie L. J.; Cross, Paul; Hudson, P. J.; Smith, Douglas W.; Stahler, Daniel R.; Packer, Craig; Craft, Meggan E.

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Year Published: 2021

Estimating inundation of small waterbodies with sub-pixel analysis of Landsat imagery: Long-term trends in surface water area and evaluation of common drought indices

Small waterbodies are numerically dominant in many landscapes and provide several important ecosystem services, but automated measurement of waterbodies smaller than a standard Landsat pixel (0.09 ha) remains challenging. To further evaluate sub‐Landsat pixel techniques for estimating inundation extent of small waterbodies (basin area: 0.06–1...

Sall, Ibrahima; Jarchow, Christopher J.; Sigafus, Brent H.; Eby, Lisa A; Forzley, Michael James; Hossack, Blake R.

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Year Published: 2020

The elephant in the lab (and field): Contamination in aquatic environmental DNA studies

The rapid evolution of environmental (e)DNA methods has resulted in knowledge gaps in smaller, yet critical details like proper use of negative controls to detect contamination. Detecting contamination is vital for confident use of eDNA results in decision-making. We conducted two literature reviews to summarize (a) the types of quality assurance...

Sepulveda, Adam J.; Hutchins, Patrick R.; Forstchen, Meghan; Mckeefry, Madeline; Swigris, Anna M

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Year Published: 2020

Infectious diseases in Yellowstone’s wolves

No abstract available.

Brandell, Ellen E.; Almberg, Emily S.; Cross, Paul; Dobson, Andrew P; Smith, Douglas W.; Hudson, Peter J.

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Year Published: 2020

An evaluation of noninvasive sampling techniques for Malayan sun bears

Traditional mark–recapture studies to estimate abundance and trends of Malayan sun bear (Helarctos malayanus) populations are impeded by logistics of live-trapping wild individuals. The development of noninvasive sampling techniques for monitoring sun bear populations is therefore crucial for targeted conservation action. Sun bears have short fur...

Tee, Thye Lim; Lai, Wai Ling; Ju Wei, Terence Kok; Shern, Ooi Zhuan; van Manen, Frank T.; Sharp, Stuart P.; Wong, Siew Te; Chew, Jactty; Ratnayeke, Shyamala

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Year Published: 2020

Systematics, evolution, and genetics of bears

Molecular genetics are key to understanding current and historical relationships between isolated populations, including species’ colonizations during glacial–interglacial cycles, to determine viability of local populations, needs for habitat corridors, and other aspects of population management, especially where bears are harvested for sport, etc...

Kitchener, Andrew C; Bellemain, Eva; Ding, Xiang; Kopatz, Alexander; Kutschera, Verena; Salomashkina, Valentina; Ruiz-Garcia, Manuel; Graves, Tabitha; Hou, Yiling; Werdelin, Lars; Janke, Axel

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Year Published: 2020

Evaluating wildlife translocations using genomics: A bighorn sheep case study

Wildlife restoration often involves translocation efforts to reintroduce species and supplement small, fragmented populations. We examined the genomic consequences of bighorn sheep (Ovis canadensis) translocations and population isolation to enhance understanding of evolutionary processes that affect population genetics and inform future...

Flesch, Elizabeth P; Graves, Tabitha; Thomson, Jennifer; Proffitt, Kelly M.; White, P.J.; Stephenson, Thomas R; Garrott, Robert A.

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Year Published: 2020

Brown Bear (Ursus arctos; North America)

This chapter comprises the following sections: names, taxonomy, subspecies and distribution, descriptive notes, habitat, movements and home range, activity patterns, feeding ecology, reproduction and growth, behavior, parasites and diseases, status in the wild, and status in captivity.

Haroldson, Mark A.; Clapham, Melanie; Costello, Cecily M.; Gunther, Kerry A.; Kendall, Kate; Miller, Sterling; Pigeon, Karine; Proctor, Michael F.; Rode, Karyn D.; Servheen, Christopher; Stenhouse, Gordon; van Manen, Frank T.

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Year Published: 2020

Ecological and social dimensions of sloth bear conservation in Sri Lanka

Balancing the needs of humans and wildlife in Sri Lanka presents enormous socioeconomic and conservation challenges. Sloth bears are legally protected, but attacks on humans generate intense fear, which increases the potential for human-caused bear mortality and local extirpation of bears. In this chapter, what is known about the ecology and human...

Ratnayeke, Shyamala; van Manen, Frank T.
Ratnayeke, S., and F. T. van Manen. 2020. Ecological and social dimensions of sloth bear conservation in Sri Lanka. Pages 379–386 in V. Penteriani and M. Melletti, editors. Bears of the World. Cambridge University Press, Cambridge, United Kingdom.