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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.
The USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
Browse more than 5,500 book chapters authored by our scientists over the past 100+ year history of the USGS and refine search by topic, location, year, and advanced search.
Filter Total Items: 6196
Evolution of fluvial styles in the Eocene Wasatch Formation, Powder River Basin, Wyoming Evolution of fluvial styles in the Eocene Wasatch Formation, Powder River Basin, Wyoming
Vertical and lateral facies changes in the lower part of the Eocene Wasatch Formation in the Powder River Basin, Wyoming represent an evolution of fluvial systems that varied from meandering to anastomosing. The meandering facies in the lower part of the study interval formed in a series of broad meanderbelts in a northnorthwestflowing system. Upon abandonment this meanderbelt facies...
Authors
Peter D. Warwick, Romeo M. Flores
Evolutionary ecology and the optimality assumption Evolutionary ecology and the optimality assumption
No abstract available
Authors
J.M. Emlen
Feeding ecology of Alcidae in the eastern North Pacific Ocean Feeding ecology of Alcidae in the eastern North Pacific Ocean
No abstract available.
Authors
K. Vermeer, S.G. Sealy, G.A. Sanger
Field methods to evaluate effects of pesticides on wildlife of the northwestern United States Field methods to evaluate effects of pesticides on wildlife of the northwestern United States
Field .methods used to evaluate the impact of organochlorine and organophosphate pesticides on wildlife populations in the Pacific Northwest are reviewed. Five field studies, presented in a CASE HISTORY format, illustrate study designs .and thetypes of information collected. The pesticides investigated included DDT, heptachlor, endr1n, and famphur, and the species studied included the...
Authors
Charles J. Henny
Flood power Flood power
No abstract available.
Genetic management of endangered species at the Patuxent Wildlife Research Center Genetic management of endangered species at the Patuxent Wildlife Research Center
Summary: The Patuxent Wildlife Research Center conducts one of the world's largest and best-known research programs for captive propagation of endangered wildlife. In order to be effective and to ensure the long-term survival of species, researchers at Patuxent attempt to manage captive populations according to the principles of population genetics. This includes the use of estimated...
Authors
R. R. Gabel, G.F. Gee
Habitat sampling, measurement and evaluation Habitat sampling, measurement and evaluation
No abstract available.
Authors
J. A. Mosher, K. Titus, M.R. Fuller