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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: 1357

Return to the wild: Translocation as a tool in conservation of the desert tortoise (Gopherus agassizii) Return to the wild: Translocation as a tool in conservation of the desert tortoise (Gopherus agassizii)

Translocation could be used as a tool in conservation of the threatened Mojave Desert Tortoise (Gopherus agassizii) by moving individuals from harm's way and into areas where they could contribute to conservation of the species. Numerous factors may affect the success of translocations, including the conditions experienced by tortoises in holding facilities while awaiting translocation...
Authors
K.J. Field, C.R. Tracy, P.A. Medica, R.W. Marlow, P.S. Corn

Use of seasonal freshwater wetlands by fishes in a temperate river floodplain Use of seasonal freshwater wetlands by fishes in a temperate river floodplain

This study examined the use of freshwater wetland restoration and enhancement projects (i.e. non-estuarine wetlands subject to seasonal drying) by fish populations. To quantify fish use of freshwater emergent wetlands and assess the effect of wetland enhancement (i.e. addition of water control structures), two enhanced and two unenhanced emergent wetlands were compared, as well as two...
Authors
Julie A. Henning, Robert E. Gresswell, Ian A. Fleming

Empirical evaluation of decision support systems: Needs, definitions, potential methods, and an example pertaining to waterfowl management Empirical evaluation of decision support systems: Needs, definitions, potential methods, and an example pertaining to waterfowl management

Decision support systems are often not empirically evaluated, especially the underlying modelling components. This can be attributed to such systems necessarily being designed to handle complex and poorly structured problems and decision making. Nonetheless, evaluation is critical and should be focused on empirical testing whenever possible. Verification and validation, in combination...
Authors
R.S. Sojda

Alpine treeline of western North America: Linking organism-to-landscape dynamics Alpine treeline of western North America: Linking organism-to-landscape dynamics

Although the ecological dynamics of the alpine treeline ecotone are influenced by climate, it is an imperfect indicator of climate change. Mechanistic processes that shape the ecotone—seed rain, seed germination, seedling establishment and subsequent tree growth form, or, conversely tree dieback—depend on microsite patterns. Growth forms affect wind and snow, and so develop positive and...
Authors
George P. Malanson, David R. Butler, Daniel B. Fagre, Stephen J Walsh, Diana F. Tomback, Lori D. Daniels, Lynn M. Resler, William K. Smith, Daniel J. Weiss, David L. Peterson, Andrew G. Bunn, Christopher A. Hiemstra, Daniel Liptzin, Patrick S. Bourgeron, Zehao Shen, Constance I. Millar

Geographic distribution: Elaphe vulpina (Western Foxsnake) Geographic distribution: Elaphe vulpina (Western Foxsnake)

A geographic description of the distribution of Elaphe vulpina (Western Foxsnake) in northern Michigan.
Authors
K.D. Bowen, E.A. Beever

Adapting to the reality of climate change at Glacier National Park, Montana, USA Adapting to the reality of climate change at Glacier National Park, Montana, USA

The glaciers of Glacier National Park (GNP) are disappearing rapidly and likely will be gone by 2030. These alpine glaciers have been continuously present for approximately 7,000 years so their loss from GNP in another 25 years underscores the significance of current climate change. There are presently only 27 glaciers remaining of the 150 estimated to have existed when GNP was created...
Authors
Daniel B. Fagre

Preface Preface

No abstract available.
Authors
Tony Prato, Daniel B. Fagre

Where the buffalo roam: The role of history and genetics in the conservation of bison on U.S. federal lands Where the buffalo roam: The role of history and genetics in the conservation of bison on U.S. federal lands

As an emblem of the Great Plains, American Indians, and wildlife conservation, the American bison (Bison bison) is one of the most visible and well-known of wildlife species in North America (fig. 1, above). Species of the genus Bison originally entered the continent via the Bering land bridge from northern Eurasia in the Illinoian glacial period of the Pleistocene epoch (125,000–500,000...
Authors
Natalie D. Halbert, Peter J. Gogan, Ron Hiebert, James N. Derr

Effects of supplemental feeding on gastrointestinal parasite infection in Rocky Mountain Elk (Cervus elaphus): Preliminary observations Effects of supplemental feeding on gastrointestinal parasite infection in Rocky Mountain Elk (Cervus elaphus): Preliminary observations

The effects of management practices on the spread and impact of parasites and infectious diseases in wildlife and domestic animals are of increasing concern worldwide, particularly in cases where management of wild species can influence disease spill-over into domestic animals. In the Greater Yellowstone Ecosystem, USA, winter supplemental feeding of Rocky Mountain elk (Cervus elaphus)...
Authors
Alicia M. Hines, Vanessa O. Ezenwa, Paul C. Cross, Jared D. Rogerson

Sustaining Rocky Mountain landscapes: Science, policy and management for the Crown of the Continent ecosystem Sustaining Rocky Mountain landscapes: Science, policy and management for the Crown of the Continent ecosystem

Prato and Fagre offer the first systematic, multi-disciplinary assessment of the challenges involved in managing the Crown of the Continent Ecosystem ( CCE), an area of the Rocky Mountains that includes northwestern Montana, southwestern Alberta, and southeastern British Columbia. The spectacular landscapes, extensive recreational options, and broad employment opportunities of the CCE...
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