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.
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Overview and history of the Beach Vitex Task Force: An interagency partnership in action
Beach vitex (Vitex rotundifolia L. f.), a woody vine from Korea, was introduced into the United States as a dune stabilization plant in the mid-1980s. By the mid- to late-1990s, Beach vitex was observed spreading from landscape plantings along the South Carolina coast, crowding out native dune species. In 2003, in response to concerns about possible impacts of the plant on native dune species, as
Authors
Randy G. Westbrooks, Elizabeth N. Brabson
Overview and status of the witchweed (striga asiatica) eradication program in the Carolinas
Witchweed [(Striga asiatica (L.) O. Kuntze)] is a parasitic weed from Asia and Africa that attaches to the roots of grasses and grass crops such as corn and sorghum. Witchweed was first detected in the western hemisphere in a corn field in Columbus County, North Carolina, in July, 1956. Since that time, a federal/state cooperative program has eliminated over 99% of the 432,000+ acres that have bee
Authors
Richard D. Iverson, Randy G. Westbrooks, Robert E. Eplee, Alan V. Tasker
Overview of prohibited and permitted plant regulatory listing systems
Pest risk analysis is a process that evaluates the risks involved with a proposed species to help determine whether it should be permitted or denied entry into a country, and how the risks could be managed if it is imported. The prohibited listing approach was developed in the late 1800s and early 1900s in response to outbreaks of plant and animals pests such as foot and mouth disease of livestock
Authors
Randy G. Westbrooks, Alan V. Tasker
Paleocene coal deposits of the Wilcox group, central Texas
Coal deposits in the Wilcox Group of central Texas have been regarded as the richest coal resources in the Gulf Coastal Plain. Although minable coal beds appear to be less numerous and generally higher in sulfur content (1 percent average, as-received basis; table 1) than Wilcox coal deposits in the Northeast Texas and Louisiana Sabine assessment areas (0.5 and 0.6 percent sulfur, respectively; ta
Authors
Robert W. Hook, Peter D. Warwick, John R. SanFilipo, Adam C. Schultz, Douglas J. Nichols, Sharon M. Swanson
Paleocene coal deposits of the Wilcox Group, Northeast Texas
The surface exposure of the Paleocene Wilcox Group in northeast Texas varies in width from 9 to 27 mi along an arcuate outcrop that extends southwest approximately 156 mi from the Texas-Arkansas State line to 32° latitude. Parts of Bowie, Camp, Cass, Franklin, Henderson, Hopkins, Morris, Navarro, Rains, Titus, Van Zandt, and Wood Counties are included in this outcrop belt (Figure 1). This area for
Authors
Robert W. Hook, Peter D. Warwick, John R. SanFilipo, Douglas J. Nichols, Sharon M. Swanson
Paleogene coal deposits of the Wilcox group and the Indio formation of south Texas
Coal deposits of the undivided Wilcox Group and its southern equivalent Indio Formation (Paleogene) of south Texas are among the coal resources that are not evaluated quantitatively in the current Gulf Coastal Plain coal re-source assessment. South Texas Wilcox and Indio coals have not been extensively mined, nor have they been mined commercially for at least the past 60 years. These coals constit
Authors
Robert W. Hook, Peter D. Warwick, John R. SanFilipo, Douglas J. Nichols
Physical and biological factors influencing environmental sources of fecal indicator bacteria in surface water
This paper describes the environmental populations of faecal indicator bacteria, and the processes by which these populations become nonpoint sources and influence nearshore water quality. The different possible sources of these indicator bacteria are presented. These include groundwater, springs and seeps, aquatic sediments, beach sand, birds, Cladophora and plant wrack. Also discussed are the en
Authors
Richard L. Whitman, Meredith B. Nevers, Katarzyna Przybyla-Kelly, Muruleedhara N. Byappanahalli
Re-establishing marshes can return carbon sink functions to a current carbon source in the Sacramento-San Joaquin Delta of California, USA
The Sacramento-San Joaquin Delta in California was an historic, vast inland freshwater wetland, where organic soils almost 20 meters deep formed over the last several millennia as the land surface elevation of marshes kept pace with sea level rise. A system of levees and pumps were installed in the late 1800s and early 1900s to drain the land for agricultural use. Since then, land surface has subs
Authors
Robin L. Miller, Roger Fujii
Real-time seismic monitoring of structures: Data handling and case studies
Within the last decade, advances in the acquisition, processing and transmission of data from real-time seismic monitoring systems has contributed to the growth in the number structures instrumented with such systems. An equally important factor for such growth can be attributed to the demands by stakeholders to find rapid answers to important questions related to the functionality (or “state of h
Authors
Mehmet Çelebi
Regulatory considerations for global transfer of cryopreserved fish gametes
No abstract available.
Authors
Jill A. Jenkins
Response of western mountain ecosystems to climatic variability and change: A collaborative research approach
No abstract available.
Authors
David L. Peterson, Craig D. Allen, Jill S. Baron, Daniel B. Fagre, Donald McKenzie, Nathan L. Stephenson, Andrew G. Fountain, Jeffrey A. Hicke, George P. Malanson, Dennis S. Ojima, Christina L. Tague, Phillip J. van Mantgem