Book Chapters
Science Quality and Integrity
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: 6158
The patterns and characteristics of global land cover The patterns and characteristics of global land cover
No abstract available.
Authors
Thomas R. Loveland
The role of helicopters in seabird censusing The role of helicopters in seabird censusing
The advantages and disadvantages of fixed-wing, helicopter, photographic, vidoegraphic, and ground-count methods of surveying and censusing seabirds are described and compared. Critical terminology is distinguished, and use of small helicopters with multiple, trained observers is firmly recommended for work with diurnal, non-burrow-nesting seabirds in the West Indies and elsewhere...
Authors
P. A. Buckley, F. G. Buckley
The role of population monitoring in the management of North American waterfowl The role of population monitoring in the management of North American waterfowl
Despite the effort and expense devoted to large-scale monitoring programs, few existing programs have been designed with specific objectives in mind and few permit strong inferences about the dynamics of monitored systems. The waterfowl population monitoring programs of the U.S. Fish and Wildlife Service, Canadian Wildlife Service and state and provincial agencies provide a nice example...
Authors
J.D. Nichols, B. Kenneth Williams, Fred A. Johnson
The role of vegetation in cowbird parasitism of yellow warblers The role of vegetation in cowbird parasitism of yellow warblers
No abstract available.
Authors
W.H. Howe, F.L. Knopf
The status and conservation on endemic Malagasy chelonians: An historic perspective The status and conservation on endemic Malagasy chelonians: An historic perspective
No abstract available.
Authors
Miguel Pedrono, Augustin Sarovy, L. Smith, Roger Bour
The status of masked bobwhite recovery in the United States and Mexico The status of masked bobwhite recovery in the United States and Mexico
The masked bobwhite (Colinus virginianus ridgwayi) is an endangered species currently numbering 1500 individuals and restricted to 2 locales in southeastern Arizona and northcentral Sonora, Mexico. The subspecies' endangered status is attributed to overgrazing of Sonora savanna grassland that began during the late 1880's and continued well into the 20th century. This overgrazing resulted...
Authors
W.P. Kuvlesky, S.A. Gall, S.J. Dobrott, S. Tolley, F.S. Guthery, S.A. DeStefano, N. King, K.R. Nolte, N.J. Silvy, J. C. Lewis, G. Gee, G. Camou Luders, R. Engel-Wilson
The Tintina Gold Belt - A global perspective The Tintina Gold Belt - A global perspective
The so-called Tintina Gold Belt extends for more than 1000 km along the length of the northern North American Cordillera. Middle to Late Cretaceous Au deposits within the belt have various similar characteristics, among which are a spatial and temporal association with magmatism; Bi-W-Te signatures in deposits hosted by granitod stocks and As-Sb signatures where hosted by sedimentary...
Authors
Richard J. Goldfarb, Craig J. R. Hart, Marti L. Miller, Lance D. Miller, G. Lang Farmer, David I. Groves
Uses of a geographic information system on the Great Dismal Swamp National Wildlife Refuge Uses of a geographic information system on the Great Dismal Swamp National Wildlife Refuge
No abstract available at this time
Authors
R.H. Giles, K. Hasshouna, D.D. Morton, J.L. Waldon
Wilderness campsite conditions under an unregulated camping policy: an eastern example Wilderness campsite conditions under an unregulated camping policy: an eastern example
This study identified and assessed 110 campsites in seven designated wilderness areas in the Jefferson National Forest of Virginia. The campsites were unevenly distributed within each wilderness, concentrating along trail corridors and near popular destination areas. With a few exceptions, most campsites surveyed were in good condition. The findings indicate that management actions...
Authors
Y.-F. Leung, J. L. Marion
Willow Flycatcher (Empidonax traillii) Willow Flycatcher (Empidonax traillii)
No abstract available.
Authors
J.A. Sedgwick
Wolf restoration to the Adirondacks: the advantages and disadvantages of public participation in the decision Wolf restoration to the Adirondacks: the advantages and disadvantages of public participation in the decision
The first time I ever saw a wolf in New York State's Adirondack Mountains was in 1956. It was a brush wolf, or coyote (Canis latrans), not a real wolf, but to an eager young wildlife student this distinction meant little. The presence of this large deer-killing canid let my fresh imagination view the Adirondacks as a real northern wilderness. Since then I have spent the last 40 years...
Authors
L. David Mech