Annual primary production: Patterns and mechanisms of change in a nutrient-rich tidal ecosystem
Alan D. Jassby, James E. Cloern, B.E. Cole
2002, Limnology and Oceanography (47) 698-712
Although nutrient supply often underlies long-term changes in aquatic primary production, other regulatory processes can be important. The Sacramento-San Joaquin River Delta, a complex of tidal waterways forming the landward portion of the San Francisco Estuary, has ample nutrient supplies, enabling us to examine alternate regulatory mechanisms over...
Potential effects of global warming on the Sacramento/San Joaquin watershed and the San Francisco estuary
Noah Knowles, Daniel R. Cayan
2002, Geophysical Research Letters (29) 38-1-38-4
California's primary hydrologic system, the San Francisco estuary and its upstream watershed, is vulnerable to the regional hydrologic consequences of projected global climate change. Projected temperature anomalies from a global climate model are used to drive a combined model of watershed hydrology and estuarine dynamics. By 2090, a projected temperature...
Aerial survey methodology for bison population estimation in Yellowstone National Park
Steven C. Hess
2002, Thesis
I developed aerial survey methods for statistically rigorous bison population estimation in Yellowstone National Park to support sound resource management decisions and to understand bison ecology. Survey protocols, data recording procedures, a geographic framework, and seasonal stratifications were based on field observations from February 1998-September 2000. The reliability of this...
Modeling and measuring snow for assessing climate change impacts in Glacier National Park, Montana
Daniel B. Fagre, David J. Selkowitz, Blase Reardon, Karen Holzer, Lisa McKeon
2002, Conference Paper, Proceedings of International Snow Science Workshop
A 12-year program of global change research at Glacier National Park by the U.S. Geological Survey and numerous collaborators has made progress in quantifying the role of snow as a driver of mountain ecosystem processes. Spatially extensive snow surveys during the annual accumulation/ablation cycle covered two mountain watersheds and approximately...
Projecting the demographic consequences of management of Yellowstone Bison: Slaughtered bison sampling winter 2001 - 2002
Peter J. Gogan, K.M. Podruzny, Edward M. Olexa
2002, Report
Abstract not available...
Grizzly bear denning chronology and movements in the Greater Yellowstone Ecosystem
Mark A. Haroldson, Mark A. Ternent, Kerry A. Gunther, Charles C. Schwartz
2002, Ursus (13) 29-38
Den entrance and emergence dates of grizzly bears (Ursus arctos) in the Greater Yellowstone Ecosystem are important to management agencies that wish to minimize impacts of human activities on bears. Current estimates for grizzly bear denning events use data that were collected from 1975–80. We update these estimates by including...
Hydrologic processes and nutrient dynamics in a pristine mountain catchment
F. Richard Hauer, Daniel B. Fagre, Jack A. Stanford
2002, Verhandlungen der Internationalen Vereinigung fur Theoretische und Angewandte Limnologie (28) 1490-1493
Nutrient dynamics in watersheds have been used as an ecosystem-level indicator of overall ecosystem function or response to disturbance (e.g. Borman.N et al. 1974, WEBSTER et al. 1992). The examination of nutrients has been evaluated to determine responses to logging practices or other changes in watershed land use. Nutrient dynamics...
The paradigm of grizzly bear restoration in North America
C. C. Schwartz
David S. Maehr, Reed F. Noss, J.L. Larkin, editor(s)
2002, Book chapter, Large Mammal Restoration in North America: ecological and sociological considerations in the 21st century
Grizzly bear restoration and recovery is a controversial, highly politicized process. By 1959, when the Craigheads began their pioneering work on Yellowstone grizzly bears, the species had been reduced to a remnant of its historic range. Prior to the colonization of North America by Europeans, the grizzly lived in relatively...
Modeling and monitoring ecosystem responses to climate change in 3 North American mountain ranges
Daniel B. Fagre, D. L. Peterson
Ch. Korner, E.M. Spehn, editor(s)
2002, Book chapter, Mountain Biodiversity: A global assessment
No abstract available...
Consumption of fungal sporocarps by Yellowstone grizzly bears
David J. Mattson, Shannon Podruzny, Mark A. Haroldson
2002, Ursus (13) 95-103
Sign of grizzly bears (Ursus arctos horribilis) consuming fungal sporocarps (mushrooms and truffles) was observed on 68 occasions during a study of radiomarked bears in the Yellowstone region, 1977–96. Sporocarps also were detected in 96 grizzly bear feces. Most fungi consumedby Yellowstone's grizzlybearsweremembersofthe Boletaceae(Suillus spp.), Russulaceae (Russula spp. and...
Spawning characteristics of redband trout in a headwater stream in Montana
Clint C. Muhlfeld
2002, North American Journal of Fisheries Management (22) 1314-1320
I investigated the spawning characteristics of redband trout Oncorhynchus mykiss gairdneri (a rainbow trout subspecies) during the spring of 1998 in Basin Creek, a third-order headwater stream located in the Kootenai River drainage in northwestern Montana. I examined the timing of spawning as related to discharge and water temperature and...
History of pronghorn population monitoring, research, and management in Yellowstone National Park
Kim A. Keating
2002, Report
Pronghorn antelope in Yellowstone National Park (YNP) persist in a small population that historically has experienced recurrent, sometimes dramatic declines. They apparently are isolated from other pronghorns, depend partly on private lands for winter range, experience heavy predation of fawns, and concentrate during winter in a relatively small area, thereby...
Effects of management practices on wetland birds: Black tern
Amy L. Zimmerman, Jill A. Dechant, Douglas A. Johnson, Christopher M. Goldade, Brent E. Jamison, Betty R. Euliss
2002, Report, Effects of management practices on wetland birds
Information on the habitat requirements and effects of habitat management on wetland birds were summarized from information in more than 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 the...
Grizzly bear denning and potential conflict areas in the Greater Yellowstone Ecosystem
Shannon Podruzny, Steve Cherry, Charles C. Schwartz, Lisa Landenburger
2002, Ursus (13) 19-28
Increasing winter use of steep, high-elevation terrain by backcountry recreationists has elevated concern about disturbance of denning grizzly bears (Ursus arctos) in the Greater Yellowstone Ecosystem (GYE). To help identify areas where such conflicts might occur, we developed a spatially explicit model to predict potential denning areas in the GYE....
Effects of management practices on wetland birds: Yellow Rail
Christopher M. Goldade, Jill A. Dechant, Douglas H. Johnson, Amy L. Zimmerman, Brent E. Jamison, James O. Church, Betty R. Euliss
2002, Report, Effects of management practices on wetland birds
Information on the habitat requirements and effects of habitat management on wetland birds were summarized from information in more than 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 the...
Tolazoline reversal of xylazine in bison (Bison bison): Mitigation of adverse effects
Thomas J. Roffe, Steven J. Sweeney
Beth Williams, Charlotte Quist, editor(s)
2002, Conference Paper
Tolazoline is a mixed alpha-1 and -2 adrenergic antagonist used to reverse the sedative, analgesic and muscle-relaxing effects of xylazine, a potent alpha adrenergic agonist. Tolazoline has been used in cattle and is superior to yohimbine, another alpha adrenergic antagonist, in this species. In white-tailed deer, tolazoline shortened recovery times...
Effectiveness of Brucella abortus Strain 19 single calfhood vaccination in elk (Cervus elaphus)
Thomas J. Roffe, Lee C. Jones, Kenneth Coffin, Steven J. Sweeney
Beth Williams, Charlotte Quist, editor(s)
2002, Conference Paper
Brucellosis in Greater Yellowstone Area (GYA) bison and elk has been a source of controversy and focus of the Greater Yellowstone Interagency Brucellosis Committee (GYIBC) for years. Brucellosis has been eradicated from cattle in the 3 states of Wyoming, Montana, and Idaho and all three states currently are classified as...
Effects of management practices on wetland birds: Virginia rail
Amy L. Zimmerman, Jill A. Dechant, Brent E. Jamison, Douglas H. Johnson, Christopher M. Goldade, James O. Church, Betty R. Euliss
2002, Report, Effects of management practices on wetland birds
Information on the habitat requirements and effects of habitat management on wetland birds were summarized from information in more than 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 the...
Effects of management practices on wetland birds: American Avocet
Jill A. Dechant, Amy L. Zimmerman, Douglas H. Johnson, Christopher M. Goldade, Brent E. Jamison, Betty R. Euliss
2002, Report, Effects of management practices on wetland birds
Information on the habitat requirements and effects of habitat management on wetland birds were summarized from information in more than 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 the...
Mercury loading and methylmercury production and cycling in high-altitude lakes from the Western United States
David P. Krabbenhoft, Mark L. Olson, John F. DeWild, David W. Clow, Robert G. Striegl, Mark M. Dornblaser, Peter C. Van Metre
2002, Water, Air, and Soil Pollution: Focus (2) 233-249
Studies worldwide have shown that mercury (Hg) is a ubiquitous contaminant, reaching even the most remote environments such as high-altitude lakes via atmospheric pathways. However, very few studies have been conducted to assess Hg contamination levels of these systems. We sampled 90 mid-latitude, high-altitude lakes from seven national parks in...
Physiography of the Monterey Bay National Marine Sanctuary and implications about continental margin development
H.D. Greene, N.M. Maher, C. K. Paull
2002, Marine Geology (181) 55-82
Combined EM-300 multibeam bathymetric data and satellite photography reveal the physiography of the continental margin between 35°50′ and 37°03′N and from the shoreline west of 122°40′ and 122°37′W, which includes Monterey Bay, in a previously unprecedented detail. Patterns in these images clearly reveal the processes that are actively influencing the...
Seafloor geology and natural environment of the Monterey Bay National Marine Sanctuary
Stephen L. Eittreim, Marlene Noble
2002, Marine Geology (181) 1-2
No abstract available....
Long-term cliff retreat and erosion hotspots along the central shores of the Monterey Bay National Marine Sanctuary
Laura J. Moore, Gary B. Griggs
2002, Marine Geology (1-3) 265-283
Quantification of cliff retreat rates for the southern half of Santa Cruz County, CA, USA, located within the Monterey Bay National Marine Sanctuary, using the softcopy/geographic information system (GIS) methodology results in average cliff retreat rates of 7–15 cm/yr between 1953 and 1994. The coastal dunes at the southern end...
Magnesium compounds
D.A. Kramer
2002, Mining Engineering (54) 38-39
Seawater and natural brines accounted for about 60% of US magnesium compounds production in 2001. Dead-burned and caustic-calcined magnesias were recovered from seawater in Florida by Premier Chemicals. They were also recovered from Michigan well brines by Dow Chemical, Martin Marietta Magnesia Specialties and Rohm & Haas. And Premier Chemicals...
Fluorspar
M. Miller
2002, Mining Engineering (54) 28-29
In 2001, one mine in Utah produced a small quantity of fluorspar. The majority of fluorspar consumed in the United States continued to come from imports or material purchased from the US National Defense Stockpile (NDS). In addition, a small amount of synthetic fluorspar (CaF2) was produced from industrial waste...
