Conference Papers
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The USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
Browse almost 5,000 conference papers authored by our scientists and refine search by topic, location, year, and advanced search.
Filter Total Items: 5519
Creation of a 30-meter land cover database for the conterminous United States—Accomplishments and future goals Creation of a 30-meter land cover database for the conterminous United States—Accomplishments and future goals
No abstract available.
Authors
Terry L. Sohl, James Vogelmann, B.K. Wylie, Charles R. Larson, J. Nicholas Van Driel
Defining models and measuring aggregate quality for gravel deposits of the Front Range Urban Corridor, Colorado Defining models and measuring aggregate quality for gravel deposits of the Front Range Urban Corridor, Colorado
No abstract available.
Authors
David A. Lindsey, William H. Langer
The Hayward Fault: source of the next big quake? The Hayward Fault: source of the next big quake?
No abstract available.
Authors
Sue E. Hirschfeld, Glenn Borchardt, Keith I. Kelson, James J. Lienkaemper, Patrick L. Williams
Constraints on Quaternary unsaturated- and saturated-zone hydrology from geochronological and isotopic studies of calcite and silica, Yucca Mountain, Nevada Constraints on Quaternary unsaturated- and saturated-zone hydrology from geochronological and isotopic studies of calcite and silica, Yucca Mountain, Nevada
No abstracts available.
Authors
James B. Paces, Zell E. Peterman, Leonid A. Neymark, J. F. Whelan, Brian D. Marshall
Atlantic white cedar plantings in St. Tammany Parish, Louisiana, and the Bogue Chitto National Wildlife Refuge, Mississippi Atlantic white cedar plantings in St. Tammany Parish, Louisiana, and the Bogue Chitto National Wildlife Refuge, Mississippi
Populations of Atlantic white cedar (Chamaecyparis thyoides (L.) B.S.P.) growing at the extreme western range of the species are in danger of being lost, and information on the ecology of these populations is limited. Seeds and seedlings ("wildlings") were collected near Vancleave, MS. The wildlings were transplanted to bay-head sites on Bogue Chitto National Wildlife Refuge where canopy...
Authors
John W. McCoy, Bobby D. Keeland, James A. Allen
Diet of the double-crested cormorant in western Lake Erie Diet of the double-crested cormorant in western Lake Erie
Sport and commercial fishing interest groups are concerned about potential impacts double-crested cormorants (Phalacrocorax auritus) may have on fish species. Our objectives for this study were to determine the diet of the cormorant in western Lake Erie and the diet overlap and competition for resources with piscivorous fish, such as walleye (Stizostedion vitreum). The stomach contents...
Authors
Michael T. Bur, Sandra L. Tinnirello, Charles D. Lovell, Jeff T. Tyson
Abundance of plankton species in Lake Michigan and incidence of early mortality syndrome from 1983 to 1992 Abundance of plankton species in Lake Michigan and incidence of early mortality syndrome from 1983 to 1992
No abstract available at this time
Authors
J. P. Hinterkopf, D. C. Honeyfield, J. Markarewicz, T. Lewis
An aerial survey method to estimate sea otter abundance An aerial survey method to estimate sea otter abundance
Sea otters (Enhydra lutris) occur in shallow coastal habitats and can be highly visible on the sea surface. They generally rest in groups and their detection depends on factors that include sea conditions, viewing platform, observer technique and skill, distance, habitat and group size. While visible on the surface, they are difficult to see while diving and may dive in response to an...
Authors
James L. Bodkin, Mark S. Udevitz
An environmental tolerance index for ostracodes as indicators of physical and chemical factors in aquatic habitats An environmental tolerance index for ostracodes as indicators of physical and chemical factors in aquatic habitats
Continental ostracode occurrences reflect salinity, solute composition, temperature, flow conditions, and other environmental properties of the water they inhabit. Their occurrences also reflect the variability of many of these environmental parameters. Environmental tolerance indices (ETIs) offer a new way to express the nature of an ostracode's environment. As defined herein, ETIs...
Authors
B. Brandon Curry
An organized signal in snowmelt runoff over the West An organized signal in snowmelt runoff over the West
No abstract available.
Authors
D. H. Peterson, R. E. Smith, M. D. Dettinger, D.R. Cayan, L. Riddle
Arenig-early Llanvirn age Celtic brachiopod assemblage reaffirmed Arenig-early Llanvirn age Celtic brachiopod assemblage reaffirmed
[No abstract available]
Authors
R. B. Neuman
Calculation and error analysis of a digital elevation model of Hofsjokull, Iceland, from SAR interferometry Calculation and error analysis of a digital elevation model of Hofsjokull, Iceland, from SAR interferometry
Two ascending European Space Agency (ESA) Earth Resources Satellites (ERS)-1/-2 tandem-mode, synthetic aperture radar (SAR) pairs are used to calculate the surface elevation of Hofsjokull, an ice cap in central Iceland. The motion component of the interferometric phase is calculated using the 30 arc-second resolution USGS GTOPO30 global digital elevation product and one of the ERS tandem...
Authors
Jonathan S. Barton, Dorothy K. Hall, Oddur Sigurdsson, Richard S. Williams, Laurence C. Smith, James B. Garvin