Niche evolution and adaptive radiation: Testing the order of trait divergence
D. D. Ackerly, D.W. Schwilk, C.O. Webb
2006, Ecology (87)
In the course of an adaptive radiation, the evolution of niche parameters is of particular interest for understanding modes of speciation and the consequences for coexistence of related species within communities. We pose a general question: In the course of an evolutionary radiation, do traits related to within-community niche differences...
Tamarisk research priorities of land and water managers: results from a USGS partnership meeting
L. Hanson, P.B. Shafroth, F. D’Erchia
2006, Conference Paper, Tamarisk Research Conference: Current Status and Future Directions
No abstract available....
Hydrologic-hydraulic analysis of the Toa Vaca Dam
T.-S. Heriberto, A.C. MillerArthur
2006, Conference Paper, Association of State Dam Safety Officials - Dam Safety 2006, Proceedings from the 2006 Annual Conference
[No abstract available]...
Conceptual ecological model for management of breeding grassland birds in the Mid-Atlantic Region
Bruce G. Peterjohn
2006, Natural Resource Report NPS/NER/NRR--2006/005
The status of grassland birds has become an increasingly important conservation issue. These species exhibit the most consistent population declines of any group of North American birds during the past 40 years. Anecdotal evidence suggests these declines have been occurring for nearly a century (Peterjohn and Sauer 1999). While the...
Geophysical evaluation of the Success Dam foundation, Porterville, California
L. E. Hunter, M.H. Powers, S. Haines, T. Asch, B.L. Burton, D.C. Serafini
2006, Conference Paper, Association of State Dam Safety Officials - Dam Safety 2006, Proceedings from the 2006 Annual Conference
Success Dam is a zonedearth fill embankment located near Porterville, CA. Studies of Success Dam by the recent Dam Safety Assurance Program (DSAP) have demonstrated the potential for seismic instability and large deformation of the dam due to relatively low levels of earthquake shaking. The U.S. Army Corps of Engineers...
Submarine geology of Hana Ridge and Haleakala Volcano's northeast flank, Maui
Barry W. Eakins, Joel E. Robinson
2006, Journal of Volcanology and Geothermal Research (151) 229-250
We present a morphostructural analysis of the submarine portions of Haleakala Volcano and environs, based upon a 4-year program of geophysical surveys and submersible explorations of the underwater flanks of Hawaiian volcanoes that was conducted by numerous academic and governmental research organizations in Japan and the U.S. and funded primarily...
The application of acoustic Doppler current profilers to measure the timing and patterns of coral larval dispersal
Curt D. Storlazzi, E.K. Brown, Michael E. Field
2006, Coral Reefs (25) 369-381
An experiment was conducted along the reefs off west Maui, Hawaii, during the summer of 2003 to monitor the spawning of the reef-building coral Montipora capitata and to determine the role of ocean currents in dispersing the larvae from the natal reef. Instruments documented the environmental forcing during the coral...
Timing of Cenozoic volcanism and Basin and Range extension in northwestern Nevada: New constraints from the northern Pine Forest Range
J.P. Colgan, T.A. Dumitru, M. McWilliams, E. L. Miller
2006, Geological Society of America Bulletin (118) 126-139
Eocene-middle Miocene volcanic rocks in the northern Pine Forest Range, Nevada, are ideally situated for reconstructing the timing and style of volcanism and extensional faulting in the northwesternmost part of the Basin and Range province. A conformable sequence of Cenozoic volcanic and sedimentary strata in the northern Pine Forest Range...
Alternative barging strategies to improve survival of transported juvenile salmonids
G.A. McMichael, J.A. Vucelick, B. Ryan, L. Gilbreath, R.L. McComas, Styles Smith, M. Carper, D. Elliot, T. Murray, L. Applegate, C. McKibben
2006, Report
No abstract available ...
Reducing risk in exploration under cover
Donald A. Singer, Ryoichi Kouda
2006, Conference Paper, Proceedings of 9th International Symposium on Mineral Exploration (ISME IX): Toward new frontiers for resource exploration and sustainable development
No abstract available....
The quest for a safe and effective canine distemper virus vaccine for black-footed ferrets
Jeffrey Wimsatt, Dean E. Biggins, Elizabeth S. Williams, Victor M. Becerra
2006, Conference Paper, Recovery of the black-footed ferret: Progress and continuing challenges- Proceedings of the Symposium on the Status of the Black-footed Ferret and Its Habitat, Fort Collins, Colorado, January 28-29, 2004 (Scientific Investigations Report 2005-5293)
Canine distemper virus (CDV) causes a systemic disease that is highly virulent to mustelids and other carnivore (Order Carnivora) species and is found worldwide. Endemic canine distemper in wild and domestic carnivores in the United States has made reintroduction of endangered black-footed ferrets (Mustela nigripes) difficult in the absence of...
Trends in the nutrient enrichment of U.S. rivers during the late 20th century and their relation to changes in probable stream trophic conditions
R. B. Alexander, R. A. Smith
2006, Conference Paper, Limnology and Oceanography
We estimated trends in concentrations of total phosphorus (TP) and total nitrogen (TN) and the related change in the probabilities of trophic conditions from 1975 to 1994 at 250 nationally representative riverine monitoring locations in the U.S. with drainage areas larger than about 1,000 km2. Statistically significant (p < 0.05)...
High-resolution seismic-reflection imaging 25 years of change in I-70 sinkhole, Russell County, Kansas
R. D. Miller, D.W. Steeples, J.L. Lambrecht, N. Croxton
2006, SEG Technical Program Expanded Abstracts (25) 1411-1415
Time-lapse seismic reflection imaging improved our understanding of the consistent, gradual surface subsidence ongoing at two sinkholes in the Gorham Oilfield discovered beneath a stretch of Interstate Highway 70 through Russell and Ellis Counties in Kansas in 1966. With subsidence occurring at a rate of around 10 cm per year...
Early mortality syndrome in coho salmon (Oncorhynchus kisutch) and Chinook salmon (O. tshawytscha) in the Great Lakes
Diane G. Elliott
D.W. Bruno, D.G. Elliott, B. Nowak, editor(s)
2006, Conference Paper, EAFP 2005 Copenhagen Histopathology Workshop. Reproductive pathology and early life stages pathology: Notes and images.
No abstract available....
Foreword: Understanding through modeling
C. Zheng, E. Poeter, M. Hill, J. Doherty
2006, Conference Paper, Ground Water
[No abstract available]...
Prediction and discovery of new geothermal resources in the Great Basin: Multiple evidence of a large undiscovered resource base
M.F. Coolbaugh, G. L. Raines, R. E. Zehner, L. Shevenell, C.F. Williams
2006, Conference Paper, Transactions - Geothermal Resources Council
Geothermal potential maps by themselves cannot directly be used to estimate undiscovered resources. To address the undiscovered resource base in the Great Basin, a new and relatively quantitative methodology is presented. The methodology involves three steps, the first being the construction of a data-driven probabilistic model of the location of...
The use of artificial impoundments by two amphibian species in the Delaware Water Gap National Recreation Area
J.T. Julian, C.D. Snyder, J.A. Young
2006, Northeastern Naturalist (13) 459-468
We compared breeding activity of Ambystoma maculatum (Spotted Salamander) and Rana sylvatica (Wood Frog) in artificial impoundments to patterns in natural wetlands over a three-year period in the Delaware Water Gap National Recreation Area. Rana sylvatica were 5.6 times more likely to use natural bodies of water for breeding than...
Spatial structure in the diet of imperial eagles Aquila heliaca in Kazakhstan
T.E. Katzner, E. A. Bragin, S.T. Knick, A.T. Smith
2006, Journal of Avian Biology (37) 594-600
We evaluated the relationship between spatial variability in prey and food habits of eastern imperial eagles Aquila heliaca at a 90,000 ha national nature reserve in north-central Kazakhstan. Eagle diet varied greatly within the population and the spatial structure of eagle diet within the population varied according to the scale...
A note on the correlation between geophysical observations and seismicity in the Arava/(Araba) Valley at the southern part of the Dead Sea fault
M. Rybakov, A. Shapira, A. Al-Zoubi, Uri S. ten Brink, R. Hofstetter, N. Kraeva, L. Feldman
2006, Israel Journal of Earth Sciences (55) 173-183
The spatial distribution of the earthquakes in the Arava Valley, a 150-km section of the Dead Sea Transform, is compared for the first time with the local subsurface geological features derived from geophysical and geological data. Gravity data suggested that the Gharandal, Timna, and Elat basins were filled by low-density...
Soil grain analyses at Meridiani Planum, Mars
C.M. Weitz, R. C. Anderson, J.F. Bell III, W. H. Farrand, Kenneth E. Herkenhoff, J. R. Johnson, B.L. Jolliff, R.V. Morris, S. W. Squyres, R.J. Sullivan
2006, Journal of Geophysical Research E: Planets (111)
Grain‐size analyses of the soils at Meridiani Planum have been used to identify rock sources for the grains and provide information about depositional processes under past and current conditions. Basaltic sand, dust, millimeter‐size hematite‐rich spherules interpreted as concretions, spherule fragments, coated partially buried spherules, basalt fragments, sedimentary outcrop fragments, and...
Photodegradation of polyaromatic hydrocarbons in passive air samplers: Field testing different deployment chambers
M.E. Bartkow, K.E. Kennedy, J.N. Huckins, N. Holling, T. Komarova, J.F. Muller
2006, Environmental Pollution (144) 371-376
Semi-permeable membrane devices (SPMDs) were loaded with deuterated anthracene and pyrene as performance reference compounds (PRCs) and deployed at a test site in four different chambers (open and closed box chamber, bowl chamber and cage chamber) for 29 days. The losses of PRCs and the uptake of polyaromatic hydrocarbons (PAHs)...
Addition of simultaneous heat and solute transport and variable fluid viscosity to SEAWAT
D. Thorne, C.D. Langevin, M.C. Sukop
2006, Computers & Geosciences (32) 1758-1768
SEAWAT is a finite-difference computer code designed to simulate coupled variable-density ground water flow and solute transport. This paper describes a new version of SEAWAT that adds the ability to simultaneously model energy and solute transport. This is necessary for simulating the transport of heat and salinity in coastal aquifers...
Environmental threats to tidal-marsh vertebrates of the San Francisco Bay estuary
John Y. Takekawa, I. Woo, Hildie Spautz, N. Nur, Grenier J. Letitia, K. Malamud-Roam, Nordby J. Cully, A.N. Cohen, F. Malamud-Roam, Wainwright-De La Cruz
Greenberg R.Maldonado J.E.Droege S.McDonald M.V., editor(s)
2006, Studies in Avian Biology 176-197
The San Francisco Bay and delta system comprises the largest estuary along the Pacific Coast of the Americas and the largest remaining area for tidal-marsh vertebrates, yet tidal marshes have been dramatically altered since the middle of the 19th century. Although recent efforts to restore ecological functions are notable, numerous...
Evaluating minerals of environmental concern using spectroscopy
G.A. Swayze, R. N. Clark, C.T. Higgins, R.F. Kokaly, K. Eric Livo, T.M. Hoefen, C. Ong, F.A. Kruse
2006, Conference Paper, International Geoscience and Remote Sensing Symposium (IGARSS)
Imaging spectroscopy has been successfully used to aid researchers in characterizing potential environmental impacts posed by acid-rock drainage, ore-processing dust on mangroves, and asbestos in serpentine mineral deposits and urban dust. Many of these applications synergistically combine field spectroscopy with remote sensing data, thus allowing more-precise data calibration, spectral analysis...
Correlated growth and survival of juvenile spectacled eiders: Evidence of habitat limitation?
Paul L. Flint, Julie A. Morse, J. Barry Grand, Christine L. Moran
2006, The Condor (108) 901-911
We studied the growth and survival of Spectacled Eider (Somateria fischeri) ducklings to 30 days of age along the lower Kashunuk River on the Yukon-Kuskokwim Delta from 1995 to 2000. We replicated this study at a second site, Kigigak Island, in 1999 and 2000. Age-adjusted estimates of duckling mass and...
