Sagebrush ecosystems: current status and trends.
E.A. Beever, J.W. Connelly, S.T. Knick, M.A. Schroeder, S. J. Stiver
2004, Book chapter, Conservation Assessment of greater sage-grouse and sagebrush habitats.
The sagebrush (Artemisia spp.) biome has changed since settlement by Europeans. The current distribution, composition and dynamics, and disturbance regimes of sagebrush ecosystems have been altered by interactions among disturbance, land use, and invasion of exotic plants. In this chapter, we present the dominant factors that have influenced habitats across...
Vital signs monitoring plan for the Klamath Network: Phase I report
Daniel Sarr, Dennis Odion, Robert E. Truitt, Erik A. Beever, Sarah Shafer, Andrew Duff, Sean B. Smith, Windy Bunn, Judy Rocchio, Eli Sarnat, John Alexander, Steve Jessup
2004, Report
This report chronicles the Phase 1 stage of the vital signs monitoring program for the Klamath Network. It consists of two chapters and eleven appendixes. The purposes of Chapter One are to 1) describe the network administrative structure and approach to planning; 2) introduce the Klamath Network parks, their resources,...
Nutritional ecology of ursids: A review of newer methods and management implications
Charles T. Robbins, Charles C. Schwartz, L.A. Felicetti
2004, Ursus (15) 161-171
The capability to understand the nutritional ecology of free-ranging bears has increased dramatically in the last 20 years. Advancements have occurred because (1) managers and biologists recognized the need to link habitat quality, productivity, and variability with bear movements, home ranges, and demographic parameters like reproductive output, survival, and population...
Pattern detection in stream networks: Quantifying spatial variability in fish distribution
Christian E. Torgersen, Robert E. Gresswell, Douglas S. Bateman
2004, Conference Paper
Biological and physical properties of rivers and streams are inherently difficult to sample and visualize at the resolution and extent necessary to detect fine-scale distributional patterns over large areas. Satellite imagery and broad-scale fish survey methods are effective for quantifying spatial variability in biological and physical variables over a range...
Geospatial techniques for developing a sampling frame of watersheds across a region
Robert E. Gresswell, Douglas S. Bateman, George Lienkaemper, T.J. Guy
2004, Conference Paper
Current land-management decisions that affect the persistence of native salmonids are often influenced by studies of individual sites that are selected based on judgment and convenience. Although this approach is useful for some purposes, extrapolating results to areas that were not sampled is statistically inappropriate because the sampling design is...
Yellowstone grizzly bear investigations: Annual report of the Interagency Grizzly Bear Study Team, 2003
Charles C. Schwartz, Mark A. Haroldson, editor(s)
2004, Report
The contents of this Annual Report summarize results of monitoring and research from the 2003 field season. The report also contains a summary of nuisance grizzly bear (Ursus arctos horribilis) management actions. The study team continues to work on issues associated with counts of unduplicated females with cubs-of-the-year (COY). These counts...
Importance of salmon to wildlife: Implications for integrated management
Grant V. Hilderbrand, Sean D. Farley, Charles C. Schwartz, Charles T. Robbins
2004, Ursus (15) 1-9
Salmon (Oncorhynchuss pp.) are an important resource for terrestrial wildlife. However, the salmon requirements of wildlife populations and the role wildlife play in nutrient transport across ecosystems are largely ignored in salmon and habitat management. Any activity that reduces the availability of or access to salmon by wildlife may adversely...
Integrating association data and disease dynamics: an illustration using African Buffalo in Kruger National Park
Paul C. Cross, James O. Lloyd-Smith, Justin A. Bowers, Craig T. Hay, Markus Hofmeyr, Wayne M. Getz
2004, Annales Zoologici Fennici (41) 879-892
Recognition is a prerequisite for non-random association amongst individuals. We explore how non-random association patterns (i.e. who spends time with whom) affect disease dynamics. We estimated the amount of time individuals spent together per month using radio-tracking data from African buffalo and incorporated these data into a dynamic social network...
Natural avalanches and transportation: A case study from Glacier National Park, Montana, USA
B.A. Reardon, Daniel B. Fagre, R.W. Steiner
2004, Conference Paper, Proceedings of The International Snow Science Workshop
In January 2004, two natural avalanches (destructive class 3) derailed a freight train in John F. Stevens Canyon, on the southern boundary of Glacier National Park. The railroad tracks were closed for 29 hours due to cleanup and lingering avalanche hazard, backing up 112km of trains and shutting down Amtrak’s...
USA: Glacier National Park, Biosphere Reserve and GLORIA Site
Daniel B. Fagre
Cathy Lee, Thomas Schaaf, Paul Simmonds, editor(s)
2004, Conference Paper, Global change research in mountain biosphere reserves
The National Park Service of the United States has 388 designated protected areas and parks that include historic and cultural sites as well as ‘natural resource’ parks set aside for their unique and outstanding natural features. Early efforts to create parks were focused on areas of beauty or unusual features...
Forecasting for natural avalanches during spring opening of Going-to-the-Sun Road, Glacier National Park, Montana, USA
Blase Reardon, Chris Lundy
2004, Conference Paper, Proceedings of the 2004 International Snow Science Workshop, Jackson Hole, Wyoming
The annual spring opening of the Going-to-the-Sun Road in Glacier National Park presents a unique avalanche forecasting challenge. The highway traverses dozens of avalanche paths mid-track in a 23-kilometer section that crosses the Continental Divide. Workers removing seasonal snow and avalanche debris are exposed to paths that can produce avalanches...
Modeling survival: application of the Andersen-Gill model to Yellowstone grizzly bears
Christopher J. Johnson, Mark S. Boyce, Charles C. Schwartz, Mark A. Haroldson
2004, Journal of Wildlife Management (68) 966-978
Wildlife ecologists often use the Kaplan-Meier procedure or Cox proportional hazards model to estimate survival rates, distributions, and magnitude of risk factors. The Andersen-Gill formulation (A-G) of the Cox proportional hazards model has seen limited application to mark-resight data but has a number of advantages, including the ability to accommodate...
Effects of management practices on grassland birds: Merlin
Paul M. Konrad
2004, Report, Effects of management practices on grassland birds
Information on the habitat requirements and effects of habitat management on grassland birds were summarized from information in more than 5,500 published and unpublished papers. A range map is provided to indicate the breeding, year-round, and nonbreeding ranges in the United States and southern Canada. Although birds frequently are observed...
What limits the Serengeti zebra population?
Sophie Grange, Patrick Duncan, Jean-Michel Gaillard, Anthony R.E. Sinclair, Peter J. Gogan, Craig Packer, Heribert Hofer, East Marion
2004, Oecologia (140) 523-532
The populations of the ecologically dominant ungulates in the Serengeti ecosystem (zebra, wildebeest and buffalo) have shown markedly different trends since the 1960s: the two ruminants both irrupted after the elimination of rinderpest in 1960, while the zebras have remained stable. The ruminants are resource limited (though parts of the...
Ecological response to global climatic change
G.P. Malanson, D.R. Butler, S. J. Walsh
Donald G. Janelle, Barney Warf, Kathy Hansen, editor(s)
2004, Book chapter, WorldMinds: Geographical Perspectives on 100 Problems, Commemorating the 100th Anniversary of the Association of American Geographers 1904 - 2004
Climate change and ecological change go hand in hand. Because we value our ecological environment, any change has the potential to be a problem. Geographers have been drawn to this challenge, and have been successful in addressing it, because the primary ecological response to climate changes in the past —...
Effects of management practices on grassland birds: Brewer's sparrow
Brett L. Walker
2004, Report, Effects of management practices on grassland birds
Information on the habitat requirements and effects of habitat management on grassland birds were summarized from information in more than 5,500 published and unpublished papers. A range map is provided to indicate the relative densities of the species in North America, based on Breeding Bird Survey (BBS) data. Although birds...
Late Quaternary evolution of channel and lobe complexes of Monterey Fan
Andrea Fildani, William R. Normark
2004, Marine Geology (206) 199-223
The modern Monterey submarine fan, one of the largest deep-water deposits off the western US, is composed of two major turbidite systems: the Neogene Lower Turbidite System (LTS) and the late Quarternary Upper Turbidite System (UTS). The areally extensive LTS is a distal deposit with low-relief, poorly defined channels,...
Holocene reef accretion: southwest Molokai, Hawaii, U.S.A.
Mary S. Engels, Charles H. Fletcher III, Michael E. Field, Curt D. Storlazzi, Eric E. Grossman, John J.B. Rooney, Christopher L. Conger, Craig Glenn
2004, Journal of Sedimentary Research (74) 255-269
Two reef systems off south Molokai, Hale O Lono and Hikauhi (separated by only 10 km), show strong and fundamental differences in modern ecosystem structure and Holocene accretion history that reflect the influence of wave-induced near-bed shear stresses on reef development in Hawaii. Both sites are exposed to similar impacts...
Seagrass communities of the Gulf Coast of Florida: status and ecology
Clinton J. Dawes, Ronald C. Phillips, Gerold Morrison
2004, Book
No abstract available....
The LISST-SL streamlined isokinetic suspended-sediment profiler
John R. Gray, Yogesh C. Agrawal, H. Charles Pottsmith
2004, Conference Paper, Proceedings of the Ninth International Symposium on River sedimentation: October 18-21, 2004 Yichang, China
The new manually deployed Laser In Situ Scattering Transmissometer-StreamLined profiler (LISST-SL) represents a major technological advance for suspended-sediment measurements in rivers. The LISST-SL is being designed to provide real-time data on sediment concentrations and particle-size distributions. A pressure sensor and current meter provide real-time depth and ambient velocity...
Surrogate technologies for continuous suspended-sediment monitoring in the United States
John R. Gray, Jeffrey W. Gartner
2004, Conference Paper, Proceedings of the Ninth International Symposium on River sedimentation: October 18-21, 2004 Yichang, China
No abstract available....
Coordination of international bedload research
John R. Gray, Jonathan B. Laronne
2004, Conference Paper, Proceedings of the Ninth International Symposium on River sedimentation: October 18-21, 2004 Yichang, China
No abstract available....
An invitation to participate in a North American sediment-monitoring network
W. R. Osterkamp, Phil Heilman, J. R. Gray
2004, Eos, Transactions, American Geophysical Union (85) 386-388
No abstract available....
Fluorspar
M. Miller
2004, Mining Engineering (56) 20-22
Supply and demand data for fluorspar are provided. Industry developments and the outlook for 2005 are discussed....
Mineral resource of the month: rare earths
James B. Hedrick
2004, Geotimes (2004)
As if classified as a top-secret project, the rare earths have been shrouded in secrecy. The principal ore mineral of the group, bastnäsite, rarely appears in the leading mineralogy texts. The long names of the rare-earth elements and some unusual arrangements of letters, many Scandinavian in origin, may have intimidated...
