Grizzly bear nutrition and ecology studies in Yellowstone National Park
Charles T. Robbins, Charles C. Schwartz, Kerry A. Gunther, Christopher Servheen
2006, Yellowstone Science (14) 19-26
T HE CHANCE TO SEE a wild grizzly bear is often the first or second reason people give for visiting Yellow - stone National Park. Public interest in bears is closely coupled with a desire to perpetuate this wild symbol of the American West. Grizzly bears have long been described...
Hydrologic landscape units and adaptive management of intermountain wetlands
Stephen G. Custer, R.S. Sojda
2006, Conference Paper, Adaptive Management of Water Resources: American Water Resources Association Summer Specialty Conference.
daptive management is often proposed to assist in the management of national wildlife refuges and allows the exploration of alternatives as well as the addition of ne w knowledge as it becomes available. The hydrological landscape unit can be a good foundation for such efforts. Red Rock Lakes National Wildlife...
Mapping new terrain climate change and America’s West: Anticipating challenges to western mountain ecosystems and resources
CIRMOUNT Committee
2006, Report
Climate variability and sustained change presage far-reaching transformations across America’s West, an expanse dominated by immense mountain ranges and interspersed with important urban centers. These mountains provide the region’s life blood—water that courses through its streams and runs out its faucets, power that fuels its industries and lights its...
Taxonomic and geographic variation in oviposition by tailed frogs (Ascaphus spp)
Nancy E. Karraker, David S. Pilliod, M. J. Adams, Evelyn L. Bull, Paul Stephen Corn, Lowell V. Diller, Marc P. Hayes, Blake R. Hossack, Garth R. Hodgson, Erin J. Hyde, Kirk Lohman, Bradford R. Norman, Lisa M. Ollivier, Christopher A. Pearl, Charles R. Peterson
2006, Northwestern Naturalist (87) 87-97
Tailed frogs (Ascaphus spp.) oviposit in cryptic locations in streams of the Pacific Northwest and Rocky Mountains. This aspect of their life history has restricted our understanding of their reproductive ecology. The recent split of A. montanus in the Rocky Mountains from A. truei was based on molecular differentiation, and...
Assessing vaccination as a control strategy in an ongoing epidemic: Bovine tuberculosis in African buffalo
Paul C. Cross, Wayne M. Getz
2006, Ecological Modelling (196) 494-504
Bovine tuberculosis (BTB) is an exotic disease invading the buffalo population (Syncerus caffer) of the Kruger National Park (KNP), South Africa. We used a sex and age-structured epidemiological model to assess the effectiveness of a vaccination program and define important research directions. The model allows for dispersal between a focal...
High resolution tree-ring based spatial reconstructions of snow avalanche activity in Glacier National Park, Montana, USA
Gregory T. Pederson, Blase Reardon, C.J. Caruso, Daniel B. Fagre
2006, Conference Paper, Proceedings of 2006 International Snow Science Workshop
Effective design of avalanche hazard mitigation measures requires long-term records of natural avalanche frequency and extent. Such records are also vital for determining whether natural avalanche frequency and extent vary over time due to climatic or biophysical changes. Where historic records are lacking, an accepted substitute is a chronology developed...
Modeling the invasion and spread of contagious disease in heterogeneous populations
W.M. Getz, James O. Lloyd-Smith, Paul C. Cross, S. Bar-David, P.L.F. Johnson, T.C. Porco, M.S. Sanchez
Zhilan Feng, Ulf Dieckmann, Simon A. Levin, editor(s)
2006, Book chapter, Disease evolution: Models, concepts, and data analyses
No abstract available....
Coping with climate change
Tony Prato, Daniel B. Fagre
2006, ActionBioscience
What have we learned so far about how climate change is affecting our global environment? Studies show that it adversely affects human and natural systems by • reducing biodiversity • altering hydrological systems • impairing biological and chemical cycles • making it more difficult to restore degraded ecosystems Climate is not the only factor...
Natural glide slab avalanches, Glacier National Park, USA: A unique hazard and forecasting challenge
Blase Reardon, Daniel B. Fagre, Mark Dundas, Chris Lundy
2006, Conference Paper, Proceedings of 2006 International Snow Science Workshop
In a museum of avalanche phenomena, glide cracks and glide avalanches might be housed in the “strange but true” section. These oddities are uncommon in most snow climates and tend to be isolated to specific terrain features such as bedrock slabs. Many glide cracks never result in avalanches, and when...
The northern Yellowstone elk herd; management policy and natural regulation
Dale R. McCullough, Koichi Kaji, Masami Yamanaka
2006, Book chapter, Wildlife in Shiretoko and Yellowstone National Parks: Lessons in Wildlife Conservation from Two World Heritage Sites
No abstract available....
Long-duration drought variability and impacts on ecosystem services: A case study from Glacier National Park, Montana
Gregory T. Pederson, Stephen T. Gray, Daniel B. Fagre, Lisa J. Graumlich
2006, Earth Interactions (10) 1-28
Instrumental climate records suggest that summer precipitation and winter snowpack in Glacier National Park (Glacier NP), Montana, vary significantly over decadal to multidecadal time scales. Because instrumental records for the region are limited to the twentieth century, knowledge of the range of variability associated with these moisture anomalies and their...
Effects of fire on salmonid persistence
Robert E. Gresswell
N. G. Sugihara, Jan W. Van Wagtendonk, K. E. Shaffer, J. Fites-Kaufman, Andrea E. Thode, editor(s)
2006, Book chapter, Fire in California Ecosystems
No abstract available....
Measurements of bed load transport on Pacific Creek, Buffalo Fork and The Snake River in Grand Teton National Park, Wyoming
Susannah O. Erwin, J. C. Schmidt
2006, University of Wyoming National Park Service Research Center Annual Report (30) 37-41
Dams disrupt the flow of both of water and sediment through a watershed. Channel morphology is a function of discharge and sediment load, and perturbations caused by dams often alter channel form, causing significant geomorphic and, potentially, ecological changes (e.g. Petts and Gurnell, 2005). At the first order, dams often...
Observer error structure in bull trout redd counts in Montana streams: Implications for inference on true redd numbers
Clint C. Muhlfeld, Mark L. Taper, David F. Staples, Bradley B. Shepard
2006, Transactions of the American Fisheries Society (135) 643-654
Despite the widespread use of redd counts to monitor trends in salmonid populations, few studies have evaluated the uncertainties in observed counts. We assessed the variability in redd counts for migratory bull trout Salvelinus confluentus among experienced observers in Lion and Goat creeks, which are tributaries to the Swan River,...
Tree rings, drought, and the Pueblo abandonment of south-central New Mexico in the 1670s
James A. Parks, Jeffery S. Dean, Julio L. Betancourt
David E. Doyel, Jeffery S. Dean, editor(s)
2006, Book chapter, Environmental change and human adaptation in the American Southwest
No abstract available....
Overview of selected surrogate technologies for continuous suspended-sediment monitoring
J. R. Gray, J. W. Gartner
2006, Conference Paper, Proceedings of the Eighth Federal Interagency Sedimentation Conference (8thFISC), April2-6, 2006, Reno, NV, USA
Surrogate technologies for inferring selected characteristics of suspended sediments in surface waters are being tested by the U.S. Geological Survey and several partners with the ultimate goal of augmenting or replacing traditional monitoring methods. Optical properties of water such as turbidity and optical backscatter are the most commonly used surrogates...
Sand waves of the Golden Gate
Patrick L. Barnard
2006, Report, 2006 Ecosystem Observations, Monterey Bay National Marine Sanctuary
No abstract available....
Mineral resource of the month: bismuth
James F. Carlin Jr.
2006, Geotimes (2006)
Bismuth compounds are most known for their soothing effects on the stomach, wounds and sores. These properties make the compounds an essential part of many medicinal and cosmetic preparations, which until 1930 accounted for about 90 percent of the bismuth used. The subsequent development of low-melting alloys and chemical catalysts...
Highly Pathogenic Avian Influenza Early Detection Data System (HEDDS)
Robert Worrest, F. Joshua Dein
2006, Report
HEDDS offers a unique opportunity for multiagency cooperation for data sharing and visualization....
Exploration review
D.R. Wilburn
2006, Mining Engineering (58) 37-47
This summary of international mineral exploration activities for the year 2005 draws upon available information from literature, industry and U.S. Geological Survey (USGS) specialists. It provides data on exploration budgets by global region and mineral commodity and identifies significant mineral discoveries and exploration target areas. It also discusses government programs...
Mineral of the month: cement
Hendrik G. van Oss
2006, Geotimes (2006)
Hydraulic cement is a virtually ubiquitous construction material that, when mixed with water, serves as the binder in concrete and most mortars. Only about 13 percent of concrete by weight is cement (the rest being water and aggregates), but the cement contributes all of the concrete’s compressional strength. The term...
Mineral resource of the month: tellurium
Micheal W. George
2006, Geotimes (2006)
Global demand for tellurium has grown significantly in recent years owing to increased use in solar cells in the United States and Europe, thermoelectronics (especially in China) and steelmaking worldwide. Estimated global production, however, has remained relatively unchanged over the same period, while accumulated inventories have been exhausted, leading to...
Mineral resource of the month: lithium
Joyce A. Ober
2006, Geotimes (2006)
Lithium, the lightest metallic element, is silvery, white and soft, and highly reactive. It is used most frequently in chemical compounds or traded as mineral concentrates. Its thermal properties make it an ideal component in thermal shock-resistant ceramics, and its electrochemical properties make it an ideal material for several types...
Mineral resource of the month: diatomite
Alan Founie
2006, Geotimes (2006)
Diatomite is a soft, very fine-grained, siliceous sedimentary rock that is usually very light grey or beige in color. It is very finely porous, very low in density and essentially chemically inert. Rocks containing diatomite are excellent reservoir rocks for hydrocarbons....
Ecosystem element cycling
A. David McGuire
Abdel H. El-Shaarawi, Walter W. Piegorsch, editor(s)
2006, Book chapter, Encyclopedia of Environmetrics
