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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
Local tsunamis and earthquake source parameters Local tsunamis and earthquake source parameters
This chapter establishes the relationship among earthquake source parameters and the generation, propagation, and run-up of local tsunamis. In general terms, displacement of the seafloor during the earthquake rupture is modeled using the elastic dislocation theory for which the displacement field is dependent on the slip distribution, fault geometry, and the elastic response and...
Authors
Eric L. Geist
Management of a large carnivore: Black bear Management of a large carnivore: Black bear
No abstract available.
Authors
Joseph D. Clark, Michael R. Pelton
Managing ecotourism visitation in protected areas Managing ecotourism visitation in protected areas
Ecotourism management seeks to integrate and balance several potentially conflicting objectives: protection of natural and cultural resources, provision of recreation opportunities and generation of economic benefits. In the absence of effective planning and management, ecotourism can lead to significant negative impacts on vegetation, soil, water, wildlife, historic resources, cultures...
Authors
J. L. Marion, T. A. Farrell
Monitoring long-term trends in Wisconsin frog and toad populations Monitoring long-term trends in Wisconsin frog and toad populations
No abstract available.
Authors
M.J. Mossman, L.M. Hartman, R. Hay, J.R. Sauer, B.J. Dhuey
Occurrence and distribution of semivolatile organic compounds in stream bed sediments, United States, 1992-95 Occurrence and distribution of semivolatile organic compounds in stream bed sediments, United States, 1992-95
Bed-sediment samples from streams were collected from 443 sites in 19 major river basins during 1992-95 and analyzed for semivolatile organic compounds (SVOCs) to assess the occurrence and distribution of selected Hydrophobic contaminants. Forty SVOCs were detected in more than 5 percent of samples. Of these 40 SVOCs, 27 were polycyclic aromatic hydrocarbons (PAHs), 5 were azaarenes, 5...
Authors
Thomas J. Lopes, Edward T. Furlong, Jeffrey W. Pritt
Opinions and other actions of the International commission involving fishes: Appendix B Opinions and other actions of the International commission involving fishes: Appendix B
No abstract available.
Authors
W. N. Eschmeyer, W. F. Weibrecht, William F. Smith-Vaniz
Organochlorine contaminants and Tree Swallows along the Fox River and Green Bay, Wisconsin, USA Organochlorine contaminants and Tree Swallows along the Fox River and Green Bay, Wisconsin, USA
Green Bay, Wisconsin is contaminated with polychlorinated biphenyls (PCBs) however, whether these contaminants affect reproduction in insectivorous birds is unknown. Tree Swallows, Tachycineta bicolor, are secondary cavity nesters that will nest in boxes and tolerate handling. Because Tree Swallows are aquatic insectivores, residues in their tissues are primarily indicative of...
Authors
Christine M. Custer, T. W. Custer, P. David Allen, K. L. Stromborg, M. J. Melancon
Pacific halibut in Glacier Bay National Park, Alaska Pacific halibut in Glacier Bay National Park, Alaska
The Pacific halibut is a large (up to 3 meters long) predatory fish in the flatfish family. Glacier Bay National Park is the site of extensive and controversial commercial halibut fisheries that began before the park was established in 1925. These fisheries continue despite prohibitive regulations, including the Wilderness Act and National Park Service regulations. Today, more than 70...
Authors
Philip N. Hooge, Spencer J. Taggart
Population trends for common prairie pothole carnivores Population trends for common prairie pothole carnivores
Since settlement of the prairie pothole region of the northern Great Plains by Europeans in the late 1800’s, carnivore populations have changed considerably—mostly due to habitat alteration and humaninflicted mortality. At least 19 species of carnivorous mammals once occurred in the prairie pothole region (Jones et al. 1983). Presently, only eight are common throughout the region—coyote...
Authors
Raymond J. Greenwood, Marsha A. Sovada
Postfire ecosystem recovery and management: The October 1993 large fire episode in California, Postfire ecosystem recovery and management: The October 1993 large fire episode in California,
No abstract available at this time
Authors
Jon E. Keeley
Present and future of scientific bird ringing Present and future of scientific bird ringing
In 1999 scientific bird ringing will celebrate its first century of existence. Started mainly to investigate bird movements, bird ringing has become a much more flexible method to study different aspects of bird biology. Bird ringing can only be properly organised if an effective international co-operation exists. In Europe, this co-ordination is ensured by EURING, made of 35 national...
Authors
F. Spina, J. Tautin
Radiotelemetry to determine exposure and effects of organophosphorus insecticides on sage grouse Radiotelemetry to determine exposure and effects of organophosphorus insecticides on sage grouse
No abstract available.
Authors
L. J. Blus, J.W. Connelly