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Science Quality and Integrity
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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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Introduction Introduction
Ecotoxicology is the study of the movement of environmental contaminants through ecosystems and their effects on plants and animals. Examining tissue residues of these contaminants in biota is basic to ecotoxicology, both for understanding the movement of contaminants within organisms and through food chains, and for understanding and quantifying injuries to organisms and their...
Authors
W. Nelson Beyer, James P. Meador
Introduction; Concluding remarks Introduction; Concluding remarks
No abstract available.
Authors
Jari Niemela, Jiirgen Breuste, Thomas Elmqvist, Glenn R. Guntenspergen, Philip James, Nancy McIntyre
Inverse modeling with RZWQM2 to predict water quality Inverse modeling with RZWQM2 to predict water quality
This chapter presents guidelines for autocalibration of the Root Zone Water Quality Model (RZWQM2) by inverse modeling using PEST parameter estimation software (Doherty, 2010). Two sites with diverse climate and management were considered for simulation of N losses by leaching and in drain flow: an almond [Prunus dulcis (Mill.) D.A. Webb] orchard in the San Joaquin Valley, California and...
Authors
Bernard T. Nolan, Robert W. Malone, Liwang Ma, Christopher T. Green, Michael N. Fienen, Dan B. Jaynes
Lead in birds Lead in birds
Lead is a highly toxic heavy metal that acts as a nonspecific poison affecting all body systems and has no known biological requirement. Absorption of low concentrations may result in a wide range of sublethal effects in animals, and higher concentrations may result in mortality (Demayo et al. 1982). Lead has been mined and smelted by humans for centuries, but the use of lead-based...
Authors
J. Christian Franson, Deborah J. Pain
Management case study: Tampa Bay, Florida Management case study: Tampa Bay, Florida
Tampa Bay, Florida, USA, is a shallow, subtropical estuary that experienced severe cultural eutrophication between the 1940s and 1980s, a period when the human population of its watershed quadrupled. In response, citizen action led to the formation of a public- and private-sector partnership (the Tampa Bay Estuary Program), which adopted a number of management objectives to support the...
Authors
Gerold Morrison, Holly Greening, Kimberly K. Yates
Minimizing microbial contamination of sperm samples Minimizing microbial contamination of sperm samples
No abstract available.
Authors
Jill A. Jenkins
Modeling fate and transport of fecal bacteria in surface water Modeling fate and transport of fecal bacteria in surface water
This chapter provides a basic review of deterministic and empirical statistical modelling and their application for predicting microbiological surface water quality.
Authors
Meredith B. Nevers, Alexandria B. Boehm
Modern methods of estimating biodiversity from presence-absence surveys Modern methods of estimating biodiversity from presence-absence surveys
No abstract available.
Authors
Robert M. Dorazio, Nicholas J. Gotelli, Aaron M. Ellison
Molecular insights into the biology of Greater Sage-Grouse Molecular insights into the biology of Greater Sage-Grouse
Recent research on Greater Sage-Grouse (Centrocercus urophasianus) genetics has revealed some important findings. First, multiple paternity in broods is more prevalent than previously thought, and leks do not comprise kin groups. Second, the Greater Sage-Grouse is genetically distinct from the congeneric Gunnison sage-grouse (C. minimus). Third, the Lyon-Mono population in the Mono Basin...
Authors
Sara J. Oyler-McCance, Thomas W. Quinn
Multidisciplinary approaches to climate change questions Multidisciplinary approaches to climate change questions
Multidisciplinary approaches are required to address the complex environmental problems of our time. Solutions to climate change problems are good examples of situations requiring complex syntheses of ideas from a vast set of disciplines including science, engineering, social science, and the humanities. Unfortunately, most ecologists have narrow training, and are not equipped to bring...
Authors
Beth A. Middleton