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.
Filter Total Items: 6063
Relations between stream temperature discharge, and stream/groundwater interaction along several mountain streams
No abstract available.
Authors
James Constantz, G. Zellweger
Occurrence and distribution of pesticides in streams of the Midwestern United States
No abstract available.
Authors
D. A. Goolsby, William A. Battaglin
Isotope tracers on water and solute sources in catchments
No abstract available.
Authors
Carol Kendall, C. Sklash, Thomas D. Bullen
Transport of reacting solutes in rivers and streams
In this chapter we discuss the major processes affecting solutes in rivers and streams. Here a solute is generally defined as any substance or entity that is transported downstream by the flowing waters. Under this definition, solutes may be pollutants, such as pesticides and hydrocarbons, or naturally occurring substances such as dissolved gases, nutrients, and trace elements. Study of the proces
Authors
Robert L. Runkel, Kenneth E. Bencala
Sea otters in the northern Pacific Ocean
About 250 years ago sea otters (Enhydra lutris) were distributed continuously from central Baja California, north and west along the Pacific Rim to Machatka Peninsula in Russia, and south along the Kuril Island to northern Japan (Kenyon 1969; Fig. 1a). Several hundred thousand sea otters may have occurred in the north Pacific region when commercial hunting began in the 18th century (Riedman and Es
Authors
James L. Bodkin, Ronald J. Jameson, James A. Estes
3500-year B.P. record of climatic change in estuarine deposits of south San Francisco Bay, California
No abstract available.
Authors
Mary McGann
A capture-recapture survival analysis model for radio-tagged animals
In recent years, survival analysis of radio-tagged animals has developed using methods based on the Kaplan-Meier method used in medical and engineering applications (Pollock et al., 1989a,b). An important assumption of this approach is that all tagged animals with a functioning radio can be relocated at each sampling time with probability 1. This assumption may not always be reasonable in practice
Authors
K. H. Pollock, C. M. Bunck, S.R. Winterstein, C.-L. Chen
A landscape-level analysis of marbled murrelet habitat in western Washington
No abstract available at this time
Authors
M.G. Raphael, J.A. Young, B.M. Galleher
Abundance, distribution and population status of Marbled Murrelets in Alaska
Ship-based surveys conducted throughout Alaska during the 1970's and 1980's, and more recent small boat surveys conducted in the northern Gulf of Alaska, suggest that about 280,000 murrelets reside in Alaska during summer. Most Marbled Murrelets are concentrated offshore of large tracts of coastal coniferous forests in southeast Alaska, Prince William Sound, and the Kodiak Archipelago. About 1-3 p
Authors
John F. Piatt, Nancy L. Naslund
Accuracy of migrant landbird habitat maps produced from LANDSAT TM data: Two case studies in southern Belize
The study investigated the utility of Landsat TM data applied to produce geo-referenced habitat maps for two study areas (Toledo and Stann Creek). Locational and non-site-specific map accuracy was evaluated by stratified random sampling and statistical analysis of satellite classification (SCR) versus air photo interpretation results (PIR) for the overall classification and individual classes. The
Authors
J.P. Spruce, S. Sader, C.S. Robbins, B.A. Dowell
Acidic deposition ("acid rain")
Acidic deposition, or "acid rain," describes any form of precipitation, including rain, snow, and fog, with a pH of 5.5 or below (Note: pH values below 7 are acidic; vinegar has a pH of 3). It often results when the acidity of normal precipitation is increased by sulfates and nitrates that are emitted into the atmosphere from burning fossil fuels. This form of airborne contamination is considered
Authors
R. Kent Schreiber