Book Chapters
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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.
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Tidal asymmetry and variability of bed shear stress and sediment bed flux at a site in San Francisco Bay, USA Tidal asymmetry and variability of bed shear stress and sediment bed flux at a site in San Francisco Bay, USA
The relationship between sediment bed flux and bed shear stress during a pair of field experiments in a partially stratified estuary is examined in this paper. Time series of flow velocity, vertical density profiles, and suspended sediment concentration were measured continuously throughout the water column and intensely within 1 meter of the bed. These time series were analyzed to...
Authors
Matthew L. Brennan, David H. Schoellhamer, Jon R. Burau, Stephen G. Monismith
Toward better atlases: improving presence-absence information Toward better atlases: improving presence-absence information
No abstract available.
Authors
Douglas H. Johnson, G.A. Sargeant
Toxicological assessment of aquatic ecosystems: application to watercraft contaminants in shallow water environments Toxicological assessment of aquatic ecosystems: application to watercraft contaminants in shallow water environments
Recreational boating and personal watercraft use have the potential to adversely impact shallow water systems through contaminant release and physical disturbance of bottom sediments. These nearshore areas are often already degraded by surface runoff, municipal and industrial effluents, and other anthropogenic activities. For proper management, information is needed on the level of...
Authors
P. V. Winger
Trace elements and nutrition interactions in fish and wildlife Trace elements and nutrition interactions in fish and wildlife
No abstract available.
Authors
S. J. Hamilton, D. J. Hoffman
Understanding food webs in the Chesapeake Bay Understanding food webs in the Chesapeake Bay
Approaches to predictive modeling and to management of the Chesapeake Bay ecosystem are 'bottom up' (i.e., approaches involve the control of nutrient inputs in attempts to manage plankton productivity) and 'top down' (i.e., approaches involve controls on harvest of fisheries and wildlife in attempts to manage vertebrate populations). Both approaches are limited by a lack of understanding...
Authors
J.R. Keough, G.M. Haramis, Matthew C. Perry
Using spring-water chemistry to assess groundwater contamination and ages of shallow and deep ground water flow systems Using spring-water chemistry to assess groundwater contamination and ages of shallow and deep ground water flow systems
No abstract available.
Authors
B. G. Katz, J.K. Bohlke, D. Hornsby
Visitor impact assessment and monitoring systems: Evolution and current development Visitor impact assessment and monitoring systems: Evolution and current development
Managers of protected areas are increasingly concerned with recreation impacts to the resource and how they should be managed. Impact management programs must be based on information about the severity and extent of impacts and how they are changing over time. This information need has generated considerable interest in the development of visitor impact assessment and monitoring (VIAM)...
Authors
Y.-F. Leung, J. L. Marion, D.N. Cole
West Nile virus in livestock and wildlife West Nile virus in livestock and wildlife
West Nile (WN) virus, the causative agent of West Nile fever, a dengue-like infection in humans, is one of the most widely distributed arthropod-borne viruses extending, until recently, from Africa, the Middle East, Europe, and western Asia. WN virus is a natural avian virus transmitted between birds primarily by ornithophilic mosquitoes, although isolations have been reported from...
Authors
R. G. McLean, S. R. Ubico, D. Bourne, N. Komar
Wildlife disease in the Colorado Delta as an indicator of ecosystem health Wildlife disease in the Colorado Delta as an indicator of ecosystem health
Ecosystem health and management are relatively new paradigms for environmental management (Costanza et al., 1992) and will be continually redefined and reevaluated relative to their purpose and utility in serving human society (Costanza et al., 1992; Sutter, 1993; Grumbine, 1994; Lackey, 1998, 1999). The stimulus for ecosystem management is often associated with sustaining or restoring...
Authors
Tonie E. Rocke, M. Friend
Wildlife habitat modeling in an adaptive framework: The role of alternative models Wildlife habitat modeling in an adaptive framework: The role of alternative models
No abstract available.
Authors
M.J. Conroy, C. T. Moore
Very different crustal response to extreme extension in the southern Basin and Range and Colorado Plateau transition Very different crustal response to extreme extension in the southern Basin and Range and Colorado Plateau transition
Clustered about the southwest edge of the Colorado Plateau lie many highly extended terranes. Among these are metamorphic core complexes, distinguished by low-angle normal faults with sufficient offset to expose middle crustal rocks at higher elevation relative to the surrounding areas. About 150 km to the southwest, strong extension in the Salton Trough manifests itself very differently...
Authors
Tom Parsons, Jill McCarthy, George A. Thompson
Potential consequences of climate variability and change on coastal areas and marine resources Potential consequences of climate variability and change on coastal areas and marine resources
No abstract available.
Authors
John C. Field, Donald F. Boesch, Donald Scavia, Robert Buddemeier, Virginia Burkett, Daniel Cayan, Michael Fogarty, Mark Harwell, Robert Howarth, Curt Mason, L.J. Pietrafesa, Denise Reed, Thomas Royer, Asbury Sallenger, Michael Spranger, James G. Titus