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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 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: 6197
Fire Effects on the Point Reyes Mountain Beaver (Aplodontia rufa phaea) Fire Effects on the Point Reyes Mountain Beaver (Aplodontia rufa phaea)
No abstract available at this time
Authors
Gary M. Fellers, David Pratt, Jennifer L. Griffin
Food selection among Atlantic Coast seaducks in relation to historic food habits Food selection among Atlantic Coast seaducks in relation to historic food habits
Food selection among Atlantic Coast seaducks during 1999-2005 was determined from hunter-killed ducks and compared to data from historic food habits file (1885-1985) for major migrational and wintering areas in the Atlantic Flyway. Food selection was determined by analyses of the gullet (esophagus and proventriculus) and gizzard of 860 ducks and summarized by aggregate percent for each...
Authors
Matthew C. Perry, P.C. Osenton, A. M. Wells-Berlin, D.M. Kidwell
Forest management under uncertainty for multiple bird population objectives Forest management under uncertainty for multiple bird population objectives
We advocate adaptive programs of decision making and monitoring for the management of forest birds when responses by populations to management, and particularly management trade-offs among populations, are uncertain. Models are necessary components of adaptive management. Under this approach, uncertainty about the behavior of a managed system is explicitly captured in a set of...
Authors
C. T. Moore, W.T. Plummer, M.J. Conroy
General constraints on sampling wildlife on FIA plots General constraints on sampling wildlife on FIA plots
This paper reviews the constraints to sampling wildlife populations at FIA points. Wildlife sampling programs must have well-defined goals and provide information adequate to meet those goals. Investigators should choose a State variable based on information needs and the spatial sampling scale. We discuss estimation-based methods for three State variables: species richness, abundance...
Authors
L.L. Bailey, J.R. Sauer, J.D. Nichols, P.H. Geissler
Geomorphic change and vegetation development on the Muddy River Mudflow Deposit Geomorphic change and vegetation development on the Muddy River Mudflow Deposit
Geomorphic disturbances are widely recognized as important processes that influence plant-community development and landscape-scale vegetation patterns [e.g., Veblen and Ashton (1978), Garwood et al. (1979), Swanson et al. (1988), and Malanson (1993)]. In volcanically active areas such as the Pacific Northwest, mudflows are locally important geomorphic disturbance events governing short-...
Authors
Peter M. Frenzen, Keith S. Hadley, Jon J. Major, Marc H. Weber, Jerry F. Franklin, J. H. Hardison, Sharon Stanton
Ground-nesting marine bird distribution and potential for human disturbance in Glacier Bay National Park Ground-nesting marine bird distribution and potential for human disturbance in Glacier Bay National Park
No abstract available.
Authors
Mayumi L. Arimitsu, Marc D. Romano, John F. Piatt
Habitats used by black and surf scoters in eastern North America as determined by satellite radio telemetry Habitats used by black and surf scoters in eastern North America as determined by satellite radio telemetry
Satellite radio telemetry was used to determine the movements and habitats of black scoters (Melanitta nigra) and surf scoters (Melanitta perspicillata) in eastern North America. A total of 21 surf scoters were instrumented during five years (2001-05) and 32 black scoters were instrumented during three years (2002-04) with implanted PTT 100 satellite transmitters (39 g) with external...
Authors
Matthew C. Perry, D.M. Kidwell, A. M. Wells-Berlin, E.J.R. Lohnes, Glenn H. Olsen, P.C. Osenton
Head stabilization in whooping cranes Head stabilization in whooping cranes
The whooping crane (Grus americana) is the tallest bird in North America, yet not much is known about its visual ecology. How these birds overcome their unusual height to identify, locate, track, and capture prey items is not well understood. There have been many studies on head and eye stabilization in large wading birds (herons and egrets), but the pattern of head movement and...
Authors
M.R. Kinloch, T.W. Cronin, Glenn H. Olsen
Health management for the reintroduction of eastern migratory whooping cranes (Grus americana) Health management for the reintroduction of eastern migratory whooping cranes (Grus americana)
No abstract available.
Authors
B. Hartup, J. Langenberg, Glenn H. Olsen, M. Spalding, K. Miller
Hierarchical models and Bayesian analysis of bird survey information Hierarchical models and Bayesian analysis of bird survey information
Summary of bird survey information is a critical component of conservation activities, but often our summaries rely on statistical methods that do not accommodate the limitations of the information. Prioritization of species requires ranking and analysis of species by magnitude of population trend, but often magnitude of trend is a misleading measure of actual decline when trend is...
Authors
J.R. Sauer, W.A. Link, J. Andrew Royle
High elevation ecosystem responses to atmospheric deposition of nitrogen in the Colorado Rocky Mountains, USA High elevation ecosystem responses to atmospheric deposition of nitrogen in the Colorado Rocky Mountains, USA
No abstract available.
Authors
Jill Baron, K. R. Nydick, H.M. Rueth, B. M. LaFrancois, A.P. Wolfe