Phytoplankton fuels Delta food web
Alan D. Jassby, James E. Cloern, A. B. Muller-Solger
2003, California Agriculture (57) 104-109
Populations of certain fishes and invertebrates in the Sacramento-San Joaquin Delta have declined in abundance in recent decades and there is evidence that food supply is partly responsible. While many sources of organic matter in the Delta could be supporting fish populations indirectly through...
Tidal and vertical variability of floc characteristics
Neil K. Ganju, David H. Schoellhamer
D. H. Schoellhamer, L.P. Sanford, editor(s)
2003, Conference Paper, Proceedings of the 7th International Conference on Nearshore and Estuarine Cohesive Sediment Transport Processes
No abstract available....
Climate effects of pacific decadal oscillation on streamflow of the Feather River, California
Kathryn M. Koczot, Michael D. Dettinger
2003, Conference Paper
The timing of maximum monthly-mean streamflow for the Feather River in northern California has come earlier in the year in recent decades (since the 1950s), as have timings in most rivers throughout California and the western United States. Much of the timing shift in the Feather River basin appears to...
Management implications of the ecology of free-roaming horses in semiarid ecosystems of the western United States
Erik Beever
2003, Wildlife Society Bulletin (31) 887-895
Compared to other ungulates of North America, free-roaming horses (Equus caballus) possess a unique evolutionary history that has given rise to a distinct suite of behavioral, morphological, and physiological traits. Because of their unique combination of cecal digestion, an elongate head with flexible lips, and non-uniform use of the...
Glacier National Park Biosphere Reserve: It's suitability for the Mountain Research Initiative.
D.B. Fagre
2003, Conference Paper
Characterizing grazing disturbance in semiarid ecosystems across broad spatial scales using multiple indices.
Erik A. Beever, Robin J. Tausch, Peter F. Brussard
2003, Ecological Applications (13) 119-136
Although management and conservation strategies continue to move toward broader spatial scales and consideration of many taxonomic groups simultaneously, researchers have struggled to characterize responses to disturbance at these scales. Most studies of disturbance by feral grazers investigate effects on only one or two ecosystem elements across small spatial scales,...
Spread of hybridization between native westslope cutthroat trout, Oncorhynchus clarki lewisi, and nonnative rainbow trout, Oncorhynchus mykiss
Nathaniel P. Hitt, Christopher A. Frissell, Clint C. Muhlfeld, Fred W. Allendorf
2003, Canadian Journal of Fisheries and Aquatic Sciences (60) 1440-1451
We examined spatial and temporal patterns of hybridization between native westslope cutthroat trout, Oncorhynchus clarki lewisi, and nonnative rainbow trout, O. mykiss, in streams of the Flathead River system in Montana, U.S.A. We detected hybridization in 24 of 42 sites sampled from 1998 to 2001. We found new Oncorhynchus mykiss introgression in seven of...
Large carnivores, moose, and humans: A changing paradigm of predator management in the 21st century
Charles C. Schwartz, J. E. Swenson, Sterling D. Miller
2003, Alces (39) 41-63
We compare and contrast the evolution of human attitudes toward large carnivores between Europe and North America. In general, persecution of large carnivores began much earlier in Europe than North America. Likewise, conservation programs directed at restoration and recovery appeared in European history well before they did in North America....
Modeling a complex conceptual theory of population change in the Shiras moose: History and recasting as a structural equation model
Bruce H. Pugesek
Bruce H. Pugesek, Adrian Tomer, Alexander von Eye, editor(s)
2003, Book chapter, Structural Equation Modeling: Applications in Ecological and Evolutionary Biology Research
No abstract available....
Ecological implications of bovine tuberculosis in African Buffalo herds
Alex Caron, Paul C. Cross, Johan T. du Toit
2003, Ecological Applications (13) 1338-1345
Following the recent invasion of bovine tuberculosis (BTB) into the Kruger National Park, South Africa, we conducted a study on the maintenance host, African buffalo, to investigate associations between BTB prevalence and calf:cow ratio, age structure, body condition, and endoparasite load. Statistical analyses compared herds of zero, medium (1–40%), and...
Amphibian breeding and climate change: The importance of snow in the mountains
P. Stephen Corn
2003, Conservation Biology (17) 622-625
The breeding phenologies of ectotherms are inextricably linked to weather, and amphibians in some temperate locations may have been breeding earlier in recent years in response to warmer spring temperatures (Beebee 1995: Forchhammer et al. 1998; Gibbs & Breisch 2001). Directional change in the timing of breeding resulting from climate...
Lessons from the fires of 2000: Post-fire heterogeneity in ponderosa pine forests
Natasha B. Kotliar, Sandra L. Haire, Carl H. Key
Phillip N. Omni, Linda A. Joyce, editor(s)
2003, Conference Paper, Fire, Fuel Treatments, and Ecological Restoration: Conference Proceedings: RMRS-P-29
We evaluate burn-severity patterns for six burns that occurred in the southern Rocky Mountains and the Colorado Plateau in 2000. We compare the results of two data sources: Burned Area Rehabilitations Teams (BAER) and a spatial burnseverity model derived from satellite imagery (the Normalized Burn Ratio; NBR). BAER maps tended...
Guidelines for the implementation and publication of structural equation models
Bruce H. Pugesek, Adrian Tomer
Bruce H. Pugesek, Adrian Tomer, Alexander von Eye, editor(s)
2003, Book chapter, Structural Equation Modeling: Applications in Ecological and Evolutionary Biology
No abstract available...
Climate variability and change in high elevation regions: Past, present & future
Henry F. Diaz, Martin Grosjean, Lisa J. Graumlich
2003, Climatic Change (59) 1-4
This special issue of Climatic Change contains a series of research and review articles, arising from papers that were presented and discussed at a workshop held in Davos, Switzerland on 25–28 June 2001. The workshop was titled ‘Climate Change at High Elevation Sites: Emerging Impacts’, and was convened to reprise...
Winter diel habitat use and movement by subadult bull trout in the upper Flathead River, Montana
Clint C. Muhlfeld, Steve Glutting, Rick Hunt, Durae Daniels, Brian Marotz
2003, North American Journal of Fisheries Management (23) 163-171
We evaluated the diel habitat use and movement of subadult bull trout Salvelinus confluentus by use of radiotelemetry during winter in the upper Flathead River, Montana. Of the 13 monitored bull trout, 12 (92%) made at least one diel movement to other habitat locations during their respective day–night tracking surveys and moved...
Quaternary geology and ecology of the Greater Yellowstone area
Kenneth L. Pierce, Don G. Despain, Cathy Whitlock, Kenneth P. Cannon, Grant A. Meyer, Lisa Morgan, Joseph M. Licciardi
2003, Book chapter, Quaternary Geology of the United States, INQUA 2003 Field Guide Volume
This field guide focuses on the glacial geology, ecology, paleoecology, caldera unrest, and archeology in Yellowstone and Grand Teton national parks and vicinity (Fig. 1). Some previous field guides of Yellowstone are Locke et al. (1995) for the Yellowstone valley, Fournier et al. (1994) for hydrothermal and volcanic geology of...
Modeling means in latent variable models of natural selection
Bruce H. Pugesek
Bruce H. Pugesek, Adrian Tomer, Alexander von Eye, editor(s)
2003, Book chapter, Structural equation modeling: Applications in ecological and evolutionary biology research
No abstract available....
Flowpath delineation and ground water age, Allequash Basin, Wisconsin
Christine D. Pint, Randall J. Hunt, Mary P. Anderson
2003, Ground Water (41) 895-902
An analysis of ground water flowpaths to a lake and creek in northern Wisconsin shows the flow system in a geologically simple basin dominated by lakes can be surprisingly complex. Differences in source area, i.e., lakes or terrestrial, combined with the presence of intervening lakes, which may or may not...
Concepts of structural equation modeling in biological research
Bruce H. Pugesek
Bruce H. Pugesek, Adrian Tomer, Alexander von Eye, editor(s)
2003, Book chapter, Structural equation modeling: Applications in ecological and evolutionary biology research
No abstract available....
Endangered toads in the Rockies
Paul Stephen Corn
Leslie Taylor, Kathy Martin, David Hik, Anne Ryall, editor(s)
2003, Conference Paper
The western toad species complex, endemic to western North America, includes two montane species that have undergone extensive declines. These are the Yosemite toad, Bufo canorus, in the Sierra Nevada, and the southern Rocky Mountain populations of the boreal toad, B. borea. Most declines in the Rockies appear to have...
Creation of the Teton landscape: A geologic chronicle of Jackson Hole and The Teton Range
John Calvin Reed, David Love, Kenneth Pierce
2003, Book
Geology is the science of the Earth-the study of the forces, processes, and past life that not only shape our land but influence our daily lives and our Nation's welfare. This booklet, prepared by two members of the U.S. Geological Survey, discusses how geologic phenomena are responsible for the magnificent...
Variability of isotope and major ion chemistry in the Allequash Basin, Wisconsin
John F. Walker, Randall J. Hunt, Thomas D. Bullen, David P. Krabbenhoft, Carol Kendall
2003, Ground Water (41) 883-894
As part of ongoing research conducted at one of the U.S. Geological Survey's Water, Energy, and Biogeochem-ical Budgets sites, work was undertaken to describe the spatial and temporal variability of stream and ground water isotopic composition and cation chemistry in the Trout Lake watershed, to relate the variability to the...
Nonylphenol ethoxylates and other additives in aircraft deicers, antiicers, and waters receiving airport runoff
Steven R. Corsi, Daniel H. Zitomer, Jennifer A. Field, Devon A. Cancilla
2003, Environmental Science & Technology (37) 4031-4037
Samples of nine different formulations of aircraft deicer and antiicer fluids (ADAF) were screened for the presence of selected surfactants. Nonylphenol ethoxylates (NPnEO) were identified in three ADAF formulations, octylphenol ethoxylates were identified in two formulations, and six formulations contained alcohol ethoxylates. A preliminary field study was conducted at General...
U.S. Geological Survey suspended-sediment surrogate research, Part III: Acoustic and pressure-differential technologies
John R. Gray, Eduardo Patiño, Matthew C. Larsen
2003, Conference Paper, Proceedings of the Virginia Water Research Symposium 2003: Water Resource Management for the Commonwealth
No abstract available....
U.S. Geological Survey suspended-sediment surrogate research, Part II: Optic technologies
John R. Gray, Daniel J. Gooding, Theodore S. Melis, David J. Topping, Patrick P. Rasmussen
2003, Conference Paper, Proceedings of the Virginia Water Research Symposium 2003: Water Resource Management for the Commonwealth
No abstract available....
