Bayesian time series analysis of segments of the Rocky Mountain trumpeter swan population
Christopher K. Wright, Richard S. Sojda, Daniel Goodman
2002, Waterbirds (25) 319-326
A Bayesian time series analysis technique, the dynamic linear model, was used to analyze counts of Trumpeter Swans (Cygnus buccinator) summering in Idaho, Montana, and Wyoming from 1931 to 2000. For the Yellowstone National Park segment of white birds (sub-adults and adults combined) the estimated probability of a positive growth...
Preliminary geophysical characterization of two oil production sites, Osage County, Oklahoma - Osage Skiatook Petroleum Environmental Research Project
Bruce D. Smith, Robert J. Bisdorf, Robert Horton, James K. Otton, Raymond S. Hutton
2002, Conference Paper, 9th International Petroleum Environmental Conference
Ground electromagnetic and dc resistivity geophysical surveys were used to interpret the subsurface distribution of salinized soil, water, and bedrock at two sites (A and B) and to characterize the larger scale hydrologic setting. Measurements were made on grids of about 1000 square meters using a very shallow penetrating (less...
Transforming the Rockies: Human forces, settlement patterns, and ecosystem effects
William R. Travis, David M. Theobald, Daniel B. Fagre
Jill Baron, editor(s)
2002, Book chapter, Rocky Mountain futures: An ecological perspective
The current ecological condition of the Rocky Mountains can be viewed from two somewhat opposing perspectives. The first is that human occupation has had relatively little effect on the Rockies: large natural, if not pristine, areas remain, and the region's open spaces provide wildlife habitat, majestic scenery, and a sense...
Environmental impacts of petroleum production: Fate of inorganic and organic chemicals in produced water from the Osage-Skiatook Petroleum Environmental Research sites, Osage County, Oklahoma
Yousif K. Kharaka, James J. Thordsen, Evangelos Kakouros, Marvin M. Abbott
2002, Conference Paper, 9th International Petroleum Environmental Conference
About 15 scientists from the U. S. Geological Survey, other Federal agencies and academia are involved in a multidisciplinary investigation to study the transport, fate, and natural attenuation of inorganic salts, trace metals, radionuclides and organic compounds present in produced water, and their impacts on soil, surface and ground water...
Rocky road in the Rockies: Challenges to biodiversity
Diana F. Tomback, Katherine C. Kendall
Jill Baron, editor(s)
2002, Book chapter, Rocky Mountain futures: An ecological perspective
To people worldwide, the Rocky Mountains of the United States and Canada represent a last bastion of nature in its purest and rawest form-unspoiled forests teeming with elk and deer stalked by mountain lions and grizzly bears; bald eagles nesting near lakes and rivers; fat, feisty native trout in rushing...
Produced water and hydrocarbon releases at the Osage-Skiatook petroleum environmental research sites, Osage County, Oklahoma: Introduction and geologic setting
James K. Otton, Robert A. Zielinski
2002, Conference Paper, 9th International Petroleum Environmental Conference
In February 2001, the USGS started studies of the impacts of produced water and hydrocarbon releases at 2 research sites adjacent to Skiatook Lake in southeastern Osage County near Tulsa, Oklahoma. Both sites are in a dissected area of modest relief underlain by interbedded shale, siltstone, and sandstone. Thicker resistant...
Ostracoda and paleoceanography
Thomas M. Cronin, I. Boomer, G. S. Dwyer, J. Rodriguez-Lazaro
Jonathan A. Holmes, Allan R. Chivas, editor(s)
2002, Book chapter, The ostracoda: Applications in Quaternary research
This chapter contains sections titled:IntroductionBrief Summary of Modern Ostracodes in the World's OceansPaleoceanography Over 106-107 Year TimescalesOrbital Scale Climate VariabilityMillennial Scale ClimateCentennial and Decadal Climate TrendsFuture Work...
Magnetic anomaly map of North America
North American Magnetic Anomaly Group, Viki Bankey, Alejandro Cuevas, David L. Daniels, Carol A. Finn, Israel Hernandez, Patricia L. Hill, Robert Kucks, Warner Miles, Mark Pilkington, Carter Roberts, Walter Roest, Victoria Rystrom, Sarah Shearer, Stephen L. Snyder, Ronald E. Sweeney, Julio Velez
2002, Report
This digital Magnetic Anomaly database and map for the North American continent is the result of a joint effort by the Geological Survey of Canada (GSC), U.S. Geological Survey (USGS), and Consejo de Recursos Minerales of Mexico (CRM). The database and map represent a substantial upgrade from the previous compilation...
36 - Implications of crustal strain during conventional, slow, and silent earthquakes
M.J.S. Johnston, A. T. Linde
2002, International Geophysics (81) 589-605
Uniform block-slip motion consistent with simple shear on locked fault segments is the primary feature apparent in geodetic measurements of strain accumulation along plate boundaries (Savage, 1983). However, almost every aspect of fault failure is nonlinear in character. This premise derives from theoretical models (Kostrov, 1966; Richards, 1976; Andrews, 1976;...
The northern Yellowstone elk: density dependence and climatic conditions
Mark L. Taper, Peter J.P. Gogan
2002, Journal of Wildlife Management (66) 106-122
We analyzed a time series of estimates of elk (Cervus elaphus) numbers on the northern Yellowstone winter range from 1964 to 1979 and 1986 to 1995 using a variety of discrete time stochastic population dynamic models. These models included adjustments for density, an increase in the area of winter range...
Techniques for collection and study of ostracoda
Dan L. Danielopol, Emi Ito, Guy Wansard, Takahiro Kamiya, Thomas M. Cronin, Angel Baltanas
Jonathan A. Holmes, Allan R. Chivas, editor(s)
2002, Book chapter, The ostracoda: Applications in Quaternary research
This chapter contains sections titled:IntroductionCollecting Modern OstracodaSample ProcessingAnalysis of Ostracod DataCulturing OstracodsConcluding Comments...
35 - Strength and energetics of active fault zones
James N. Brune, Wayne R. Thatcher
2002, International Geophysics (81) 569-588
The strength of active fault zones, i.e., the shear stress level required to cause fault slip, is fundamental to understanding the physics of earthquakes and to assessing earthquake hazard. Although many researchers have concluded that fault zones are weak (shear stresses 10 MPa or less averaged between 0 and ˜20...
Plasticity in vertical migration by native and exotic estuarine fishes in a dynamic low‐salinity zone
William A. Bennett, Wim J. Kimmerer, Jon R. Burau
2002, Limnology and Oceanography (47) 1496-1507
We investigated the degree of flexibility in retention strategies of young fishes in the low‐salinity zone (LSZ) of the San Francisco Estuary during years of highly variable river flow. We conducted depth‐stratified sampling over three full tidal cycles in each year from 1994 to 1996. In 1994, exotic striped bass...
Palynology of Eocene strata in the Sagavanirktok and Canning Formations on the North Slope of Alaska
Norman O. Frederiksen, Lucy E. Edwards, Thomas A. Ager, Thomas P. Sheehan
2002, Palynology (26) 59-93
This paper describes, illustrates, and interprets Eocene palynomorph assemblages from the North Slope of Alaska, mainly from 31 outcrop samples from seven stratigraphic sections at Franklin Bluffs on the Sagavanirktok River. The top of the Sagwon Member of the Sagavanirktok Formation is shown to be a thin, coaly, apparently nonmarine...
Property-transfer models
R. Haverkamp, John R. Nimmo, P. Reggiani
2002, Book chapter, Methods in soil analysis: Part 4 physical methods
No abstract available....
A model to predict the occurrence of surviving butternut trees in the southern Appalachian region: Chapter 43
Frank T. van Manen, Joseph D. Clark, Scott E. Schlarbaum, Kristine D. Johnson, Glenn Taylor
J. Michael Scott, Patricia J. Heglund, Michael L. Morrison, Jonathan B. Haufler, Martin G. Raphael, William A. Wall, Fred B. Samson, editor(s)
2002, Book chapter, Predicting species occurrences: Issues of scale and accuracy
No abstract available....
Comparative effects of climate on ecosystem nitrogen and soil biogeochemistry in U.S. national parks. FY 2001 Annual Report (Res. Rept. No. 94)
R. Stottlemyer, R. Edmonds, L. Scherbarth, K. Urbanczyk, H. Van Miegroet, J. Zak
2002, Report
In 1998, the USGS Global Change program funded research for a network of Long-Term Reference Ecosystems initially established in national parks and funded by the National Park Service. The network included Noland Divide, Great Smoky Mountains National Park, Tennessee; Pine Canyon, Big Ben National park, Texas; West Twin Creek,...
Does food availability affect energy expenditure rates of nesting seabirds? A supplemental-feeding experiment with Black-Legged Kittiwakes (Rissa tridactyla)
Patrick G.R. Jodice, Daniel D. Roby, Scott A. Hatch, Verena A. Gill, Richard B. Lanctot, G. Henk Visser
2002, Canadian Journal of Zoology (80) 214-222
We used a supplemental-feeding experiment, the doubly labeled water technique, and a model-selection approach based upon the Akaike Information Criterion to examine effects of food availability on energy expenditure rates of Black-legged Kittiwakes (Rissa tridactyla) raising young. Energy expenditure rates of supplementally fed females (n = 14) and males (n...
Invertebrate biomass: associations with lesser prairie-chicken habitat use and sand sagebrush density in southwestern Kansas
B. Jamison, R.J. Robel, J.S. Pontius, R.D. Applegate
2002, Wildlife Society Bulletin (30) 517-526
Invertebrates are important food sources for lesser prairie-chicken (Tympanuchus pallidicinctus) adults and broods. We compared invertebrate biomass in areas used and not used by lesser prairie-chicken adults and broods. We used radiotelemetry to determine use and non-use areas in sand sagebrush (Artemisia filifolia) prairie in southwestern Kansas and sampled invertebrate...
Mercury(II) sorption to two Florida Everglades peat: Evidence for strong and weak binding and competition by dissolved organic matter released from the peat
R. Todd Drexel, Markus Haitzer, Joseph N. Ryan, George R. Aiken, Kathryn L. Nagy
2002, Environmental Science & Technology (36) 4058-4064
The binding of mercury(II) to two peats from Florida Everglades sites with different rates of mercury methylation was measured at pH 6.0 and 0.01 M ionic strength. The mercury(II) sorption isotherms, measured over a total mercury(II) range of 10-7.4 to 10-3.7 M, showed the competition for mercury(II) between the peat...
Simulation of broadband ground motion including nonlinear soil effects for a magnitude 6.5 earthquake on the Seattle fault, Seattle, Washington
S. Hartzell, A. Leeds, A. Frankel, R. A. Williams, J. Odum, W. Stephenson, W. Silva
2002, Bulletin of the Seismological Society of America (92) 831-853
The Seattle fault poses a significant seismic hazard to the city of Seattle, Washington. A hybrid, low-frequency, high-frequency method is used to calculate broadband (0-20 Hz) ground-motion time histories for a M 6.5 earthquake on the Seattle fault. Low frequencies (1 Hz) are calculated by a stochastic method that uses...
Modeling ecosystem and population dynamics on the South Florida hydroscape
D.L. DeAngelis, S. Bellmund, W.M. Mooij, M.P. Nott, E.J. Comiskey, L.J. Gross, W.M. Wolff
J.W. Porter, K.G. Porter, editor(s)
2002, Book chapter, Everglades, Florida Bay and Coral Reefs of the Florida Keys: An Ecosystem Sourcebook
Abstract not supplied at this time...
Peak fire temperatures and effects on annual plants in the Mojave Desert
Matthew L. Brooks
2002, Ecological Applications (12) 1088-1102
Very little is known about the behavior and effects of fire in the Mojave Desert, because fire was historically uncommon. However, fire has become more frequent since the 1970s with increased dominance of the invasive annual grasses Bromus rubens and Schismus spp., and land managers are concerned about...
Meeting ecological and societal needs for freshwater
Jill Baron, N.L. Poff, P. L. Angermeier, Clifford N. Dahm, P.H. Gleick, N.G. Hairston Jr., R.B. Jackson, C.A. Johnston, B. D. Richter, A.D. Steinman
2002, Ecological Applications (12) 1247-1260
Human society has used freshwater from rivers, lakes, groundwater, and wetlands for many different urban, agricultural, and industrial activities, but in doing so has overlooked its value in supporting ecosystems. Freshwater is vital to human life and societal well-being, and thus its utilization for consumption, irrigation, and transport has long...
Episodic thermal perturbations associated with groundwater flow: An example from Kilauea Volcano, Hawaii
S. Hurwitz, S. E. Ingebritsen, M.L. Sorey
2002, Journal of Geophysical Research B: Solid Earth (107) ECV 13-1-ECV 13-10
Temperature measurements in deep drill holes on volcano summits or upper flanks allow a quantitative analysis of groundwater induced heat transport within the edifice. We present a new temperature-depth profile from a deep well on the summit of Kilauea Volcano, Hawaii, and analyze it in conjunction with a temperature profile...
