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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: 6158
Greater sage-grouse as an umbrella species for shrubland passerine birds: a multiscale assessment Greater sage-grouse as an umbrella species for shrubland passerine birds: a multiscale assessment
Working groups and government agen-cies are planning and conducting land actions in sagebrush (Artemisia spp.) habitats to benefit Greater Sage-Grouse (Centrocercus urophasianus) populations. Managers have adopted an umbrella concept, creating habitat characteristics specific to sage-grouse requirements, in the belief that other wildlife species dependent on sagebrush will benefit. We...
Authors
Steven E. Hanser, Steven T. Knick
Conceptualizing and communicating ecological river restoration Conceptualizing and communicating ecological river restoration
We present a general conceptual model for communicating aspects of river restoration and management. The model is generic and adaptable to most riverine settings, independent of size. The model has separate categories of natural and social-economic drivers, and management actions are envisioned as modifiers of naturally dynamic systems. The model includes a decision-making structure in...
Authors
Robert B. Jacobson, Jim Berkley
Simulating oil droplet dispersal from the Deepwater Horizon spill with a Lagrangian approach Simulating oil droplet dispersal from the Deepwater Horizon spill with a Lagrangian approach
An analytical multiphase plume model, combined with time-varying flow and hydrographic fields generated by the 3-D South Atlantic Bight and Gulf of Mexico model (SABGOM) hydrodynamic model, were used as input to a Lagrangian transport model (LTRANS), to simulate transport of oil droplets dispersed at depth from the recent Deepwater Horizon MC 252 oil spill. The plume model predicts a
Authors
Elizabeth W. North, E. Eric Adams, Zachary Schlag, Christopher R. Sherwood, Ruoying He, Hoon Hyun, Scott A. Socolofsky
Connecting pattern and process in greater sage-grouse populations and sagebrush landscapes Connecting pattern and process in greater sage-grouse populations and sagebrush landscapes
Abstract. Spatial patterns influence the processes that maintain Greater Sage-Grouse (Centrocercus urophasianus) populations and sagebrush (Artemisia spp.) landscapes on which they depend. We used connectivity analyses to: (1) delineate the dominant pattern of sagebrush landscapes; (2) identify regions of the current range-wide distribution of Greater Sage-Grouse important for...
Authors
Steven T. Knick, Steven E. Hanser
Conservation of greater sage-grouse- a synthesis of current trends and future management Conservation of greater sage-grouse- a synthesis of current trends and future management
Recent analyses of Greater Sage-Grouse (Centrocercus urophasianus) populations indicate substantial declines in many areas but relatively stable populations in other portions of the species? range. Sagebrush (Artemisia spp.) habitats neces-sary to support sage-grouse are being burned by large wildfires, invaded by nonnative plants, and developed for energy resources (gas, oil, and wind)
Authors
John W. Connelly, Steven T. Knick, Clait E. Braun, William L. Baker, Erik A. Beever, Thomas J. Christiansen, Kevin E. Doherty, Edward O. Garton, Christian A. Hagen, Steven E. Hanser, Douglas H. Johnson, Matthias Leu, Richard F. Miller, David E. Naugle, Sara J. Oyler-McCance, David A. Pyke, Kerry P. Reese, Michael A. Schroeder, San J. Stiver, Brett L. Walker, Michael J. Wisdorn
Copper mines may affect lichens of two Southern Arizona national protected areas Copper mines may affect lichens of two Southern Arizona national protected areas
No abstract available.
Authors
James P. Bennett
Isotopic tracing of perchlorate in the environment Isotopic tracing of perchlorate in the environment
Isotopic measurements can be used for tracing the sources and behavior of environmental contaminants. Perchlorate (ClO 4 − ) has been detected widely in groundwater, soils, fertilizers, plants, milk, and human urine since 1997, when improved analytical methods for analyzing ClO 4 −concentration became available for routine use. Perchlorate ingestion poses a risk to human health because...
Authors
Neil C. Sturchio, J.K. Bohlke, Baohua Gu, Paul B. Hatzinger, W. Andrew Jackson
Interactions with other large herbivores: Chapter 9 Interactions with other large herbivores: Chapter 9
No abstract available.
Authors
Jonathan A. Jenks, David M. Leslie
Camera traps in animal ecology and conservation: What's next? Camera traps in animal ecology and conservation: What's next?
No abstract available.
Authors
James D. Nichols, Allan F. O’Connell, K. Ullas Karanth
Adaptive fishway design: A framework and rationale for effective evaluations. Adaptive fishway design: A framework and rationale for effective evaluations.
No abstract available.
Authors
Theodore R. Castro-Santos
Feeding ecology and energetics Feeding ecology and energetics
Successful management of walleye and sauger populations often requires a detailed knowledge of prey resources. As with many fishes, diets of juvenile Sander spp. are often different than those of adult fish and can have important implications for growth and survival. Similarly, spatial and temporal variation in diet composition can contribute to variation in growth and production of...
Authors
Steven R. Chipps, Brian D. S. Graeb