Skip to main content
U.S. flag

An official website of the United States government

Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Https

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Search Results

684 results.

Alternate formats: Download search results as RIS  |  CSV | TSV | Excel  |  RSS feed based on this search  |  JSON version of this page of results

Page 19, results 451 - 475

Show results on a map

Publication Extents

Not all publications have extents, not all extents are completely accurate
Unusual behavior by Bison, Bison bison, toward Elk, Cervus elaphus, and wolves, Canis lupus
L.D. Mech, R.T. McIntyre, D.W. Smith
2004, Canadian Field-Naturalist (118) 115-118
Incidents are described of Bison (Bison bison) in Yellowstone National Park mauling and possibly killing a young Elk (Cervus elaphus) calf, chasing wolves (Canis lupus) off Elk they had just killed or were killing, and keeping the wolves away for extended periods. During one of the latter cases, the Bison...
Estimating survival and recruitment in a freshwater mussel population using mark-recapture techniques
R.F. Villella, D. R. Smith, D. P. Lemarie
2004, American Midland Naturalist (151) 114-133
We used a mark-recapture method and model averaging to estimate apparent survival, recruitment and rate of population growth in a native freshwater mussel population at a site on the Cacapon River, which is a tributary to the Potomac River. Over 2200 Elliptio complanata, E. fisheriana and Lampsilis cariosa were uniquely...
Unusual behavior by bison, Bison bison, toward elk, Cervus elaphus, and wolves, Canis lupus
L.D. Mech, R.T. McIntyre, D.W. Smith
2004, Canadian Field-Naturalist (118) 115-118
Incidents are described of bison (Bison bison) in Yellowstone National Park mauling and possibly killing a young elk (Cervus elaphus) calf, chasing wolves (Canis lupus) off elk they had just killed or were killing, and keeping the wolves away for extended periods. During one of the latter cases, the bison...
Mineralogy at Meridiani Planum from the Mini-TES experiment on the opportunity rover
P. R. Christensen, M.B. Wyatt, T.D. Glotch, A.D. Rogers, S. Anwar, R. E. Arvidson, J. L. Bandfield, D.L. Blaney, C. Budney, W. M. Calvin, A. Fallacaro, R.L. Fergason, N. Gorelick, T.G. Graff, V.E. Hamilton, A. G. Hayes, J. R. Johnson, A.T. Knudson, H.Y. McSween Jr., G.L. Mehall, L.K. Mehall, J.E. Moersch, R.V. Morris, M. D. Smith, S. W. Squyres, S. W. Ruff, M.J. Wolff
2004, Science (306) 1733-1739
The Miniature Thermal Emission Spectrometer (Mini-TES) on Opportunity investigated the mineral abundances and compositions of outcrops, rocks, and soils at Meridiani Planum. Coarse crystalline hematite and olivine-rich basaltic sands were observed as predicted from orbital TES spectroscopy. Outcrops of aqueous origin are composed of 15 to 35% by volume magnesium...
Effects of surface applications of biosolids on soil, crops, ground water, and streambed sediment near Deer Trail, Colorado, 1999-2003
Tracy J.B. Yager, David B. Smith, James G. Crock
2004, Scientific Investigations Report 2004-5289
The U.S. Geological Survey, in cooperation with Metro Wastewater Reclamation District and North Kiowa Bijou Groundwater Management District, studied natural geochemical effects and the effects of biosolids applications to the Metro Wastewater Reclamation District properties near Deer Trail, Colorado, during 1999 through 2003 because of public concern about potential contamination...
Helicopter electromagnetic and magnetic survey data and maps, Seco Creek area, Medina and Uvalde counties, Texas
Bruce D. Smith, David V. Smith, Patricia L. Hill, Victor F. Labson
2003, Open-File Report 2003-226
A helicopter electromagnetic and magnetic (HEM) survey was completed of a 209 square kilometer (81 square miles) area of the central Edwards aquifer. This open-file report is a release of the airborne geophysical data and a summary of the hydrologic application. The survey area was centered on the Valdina Farms...
Biosolids, soils, ground-water, and streambed-sediment data for a biosolids-application area near Deer Trail, Colorado, 1999
Michael R. Stevens, Tracy J.B. Yager, D. B. Smith, J.G. Crock
2003, Open-File Report 2002-51
In January 1999, the U.S. Geological Survey began an expanded monitoring program near Deer Trail, Colorado, in cooperation with the Metro Wastewater Reclamation District and the North Kiowa Bijou Groundwater Management District. Monitoring components were biosolids, soils, crops, ground water, and streambed sediments. The monitoring program addresses concerns from the...
Flooding in Illinois, April-June 2002
Charles Avery, D.F. Smith
2003, Open-File Report 2002-487
Widespread flooding occurred throughout most of Illinois in spring 2002 as a result of multiple intense rainstorms that moved through the State during an extended 2-month period from the third week in April through the month of May in central and southern Illinois, the first week in June in northern...
Application of adaptive cluster sampling to low-density populations of freshwater mussels
D. R. Smith, R.F. Villella, D. P. Lemarie
2003, Environmental and Ecological Statistics (10) 7-15
Freshwater mussels appear to be promising candidates for adaptive cluster sampling because they are benthic macroinvertebrates that cluster spatially and are frequently found at low densities. We applied adaptive cluster sampling to estimate density of freshwater mussels at 24 sites along the Cacapon River, WV, where a preliminary timed search...
Discovery of Olivine in the Nili Fossae Region of Mars
T.M. Hoefen, R. N. Clark, J. L. Bandfield, M. D. Smith, J.C. Pearl, P. R. Christensen
2003, Science (302) 627-630
We have detected a 30,000-square-kilometer area rich in olivine in the Nili Fossae region of Mars. Nili Fossae has been interpreted as a complex of grabens and fractures related to the formation of the Isidis impact basin. We propose that post-impact faulting of this area has exposed subsurface layers rich...
Recurring middle Pleistocene outburst floods in east-central Alaska
D.G. Froese, D.G. Smith, J.A. Westgate, T. A. Ager, S.J. Preece, A. Sandhu, R.J. Enkin, F. Weber
2003, Quaternary Research (60) 50-62
Recurring glacial outburst floods from the Yukon-Tanana Upland are inferred from sediments exposed along the Yukon River near the mouth of Charley River in east-central Alaska. Deposits range from imbricate gravel and granules indicating flow locally extending up the Yukon valley, to more distal sediments consisting of at least 10...
The distribution of uranium over Europe: Geological and environmental significance
J.A. Plant, S. Reeder, R. Salminen, D. B. Smith, T. Tarvainen, B. de Vivo, M.G. Petterson
2003, Transactions of the Institution of Mining and Metallurgy, Section B: Applied Earth Science (112) 221-238
The variation of baseline levels of uranium in soil and stream sediments over Europe is described, based on new data prepared by the Forum of European Geological Surveys (FOREGS). The samples have been collected and analysed according to the protocols established for the International Union of Geological Sciences/International Association of...
Geochemical response to variable streamflow conditions in contaminated and uncontaminated streams
Sonia A. Nagorski, Johnnie N. Moore, Temple E. McKinnon, David B. Smith
2003, Water Resources Research (39) 1-1-1-14
Seasonal variations in stream inorganic geochemistry are not well documented or understood. We sampled two mining-impacted and two relatively pristine streams in western Montana over a 12-month period, collecting samples every 4 weeks, with supplemental sampling (at least weekly) during spring runoff. We analyzed all samples for dissolved (operationally defined...
Influence of eastern hemlock (Tsuga canadensis L.) on fish community structure and function in headwater streams of the Delaware River basin
R. M. Ross, R. M. Bennett, C.D. Snyder, J.A. Young, D. R. Smith, D. P. Lemarie
2003, Ecology of Freshwater Fish (12) 60-65
Hemlock (Tsuga canadensis) forest of the eastern U.S. are in decline due to invasion by the exotic insect hemlock woolly adelgid (Adelges tsugae). Aquatic biodiversity in hemlock ecosystems has not been documented; thus the true impact of the infestation cannot be assessed. We compared ichthyofaunal assemblages and trophic structure of...
Interaction of sea water and lava during submarine eruptions at mid-ocean ridges
M.R. Perfit, J.R. Cann, D.J. Fornari, J. Engels, D.K. Smith, W.I. Ridley, M.H. Edwards
2003, Nature (426) 62-65
Lava erupts into cold sea water on the ocean floor at mid-ocean ridges (at depths of 2,500 m and greater), and the resulting flows make up the upper part of the global oceanic crust. Interactions between heated sea water and molten basaltic lava could exert significant control on the dynamics...
Large carnivores response to recreational big game hunting along the Yellowstone National Park and Absaroka-Beartooth Wilderness boundary
T.E. Ruth, D.W. Smith, M.A. Haroldson, P.C. Buotte, C.C. Schwartz, H.B. Quigley, S. Cherry, D. Tyres, K. Frey
2003, Wildlife Society Bulletin (31) 1150-1161
The Greater Yellowstone Ecosystem contains the rare combination of an intact guild of native large carnivores, their prey, and differing land management policies (National Park versus National Forest; no hunting versus hunting). Concurrent field studies on large carnivores allowed us to investigate activities of humans and carnivores on Yellowstone National...
Control of predacious flatworms Macrostomum sp. in culturing juvenile freshwater mussels
L.L. Zimmerman, R. J. Neves, D.G. Smith
2003, North American Journal of Aquaculture (65) 28-32
Flatworms of the genus Macrostomum are voracious predators on newly metamorphosed juvenile freshwater mussels (Unionidae), which require a fish host to transform mussel larvae into free-living juveniles. Toxicity tests were performed with formalin (paracide-F, 37% formaldehyde) to determine the appropriate levels of treatment for eradicating these flatworms from host fish...
Effects of water temperature and substrate type on spore production and release in eastern Tubifex tubifex worms infected with Myxobolus cerebralis
V. S. Blazer, T.B. Waldrop, W. B. Schill, Christine L. Densmore, D. Smith
2003, Journal of Parasitology (89) 21-26
Eastern Tubifex tubifex worms were exposed to Myxobolus cerebralis spores at 9, 13, 17, and 20 C in 1-L jars that contained sand, mud, or leaf litter as substrata. Beginning 60 days after exposure, water from each jar was filtered daily and examined for the presence of waterborne triactinomyxon spores...
Morphology and composition of the surface of Mars: Mars Odyssey THEMIS results
P. R. Christensen, J. L. Bandfield, J.F. Bell III, N. Gorelick, V.E. Hamilton, A. Ivanov, B. M. Jakosky, H. H. Kieffer, M. D. Lane, M. C. Malin, T. McConnochie, A. S. McEwen, H.Y. McSween Jr., G.L. Mehall, J.E. Moersch, K.H. Nealson, J. W. Rice Jr., M.I. Richardson, S. W. Ruff, M. D. Smith, T.N. Titus, M.B. Wyatt
2003, Science (300) 2056-2061
The Thermal Emission Imaging System (THEMIS) on Mars Odyssey has produced infrared to visible wavelength images of the martian surface that show lithologically distinct layers with variable thickness, implying temporal changes in the processes or environments during or after their formation. Kilometer-scale exposures of bedrock are observed; elsewhere airfall dust...
Three-dimensional imaging of buried objects in very lossy earth by inversion of VETEM data
T.J. Cui, A.A. Aydiner, W.C. Chew, D.L. Wright, D.V. Smith
2003, IEEE Transactions on Geoscience and Remote Sensing (41) 2197-2210
The very early time electromagnetic system (VETEM) is an efficient tool for the detection of buried objects in very lossy earth, which allows a deeper penetration depth compared to the ground-penetrating radar. In this paper, the inversion of VETEM data is investigated using three-dimensional (3-D) inverse scattering techniques, where multiple...