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.
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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
Cambrian-Ordovician boundary strata in the central Midcontinent of North America Cambrian-Ordovician boundary strata in the central Midcontinent of North America
[No abstract available]
Authors
Anthony C. Runkel, J.F. Miller, R.M. McKay, T.H. Shaw, D.J. Basset
CFIRP: What we learned in the first ten years CFIRP: What we learned in the first ten years
In response to public dissatisfaction with forest management methods, we initiated the College of Forestry Integrated Research Project (CFIRP) to test alternative silvicultural systems in Douglas-fir (Pseudotsuga menziesii stands in western Oregon. We compared costs and biological and human responses among a control and three replicated silvicultural alternatives to clearcutting that...
Authors
C. L. Chambers, W.C. McComb, J. C. Tappeiner, L.D. Kellogg, R.L. Johnson, G. Spycher
Coal geology of the U.S. gulf coastal region Coal geology of the U.S. gulf coastal region
No abstract available.
Authors
Peter D. Warwick, Claire E. Aubourg, S.S. Crowley, S.M. Nichols, Steven M. Podwysocki, John R. SanFilipo, R. E. Thomas, C.J. Watt, Jason C. Willett
Comparative ecology of exotic invaders and ecologically equivalent species of hydrobionths in the Great Lakes of the world: Results of Russia-USA cooperation Comparative ecology of exotic invaders and ecologically equivalent species of hydrobionths in the Great Lakes of the world: Results of Russia-USA cooperation
This paper presents brief fragments of the results of joint Russia-US research conducted through the cooperative project entitled, 'Comparative ecology of exotic invaders and ecologically equivalent species of hydrobionths in the Great Lakes of the world: Lake Baikal and the Laurentian Great Lakes.' The project was executed under the Agreement on Scientific Cooperation between the...
Authors
N.M. Pronin, G.W. Fleischer, S. G. Kohl, V. M. Korsunov, D.R. Baldanova, C.R. Bronte, C. H. Garmayeva, C. H. Hatcher, M.H. Hoff, S.G. Maistrenko, R. Nester, Robert O’Gorman, R.W. Owens, S.V. Pronina, J.H. Selgeby, Yury Sokolnikov, N. T. Todd