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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.
Filter Total Items: 6196
Geologic, hydrologic, and urban hazards for design in desert environments Geologic, hydrologic, and urban hazards for design in desert environments
No abstract available.
Authors
Robert H. Webb, Stanley A. Leake, Richard A. Malloy
Geologic framework and petroleum systems of Cook Inlet basin, south-central Alaska Geologic framework and petroleum systems of Cook Inlet basin, south-central Alaska
This report provides a comprehensive overview of the stratigraphy, structure, tectonics, and petroleum systems of the Cook Inlet basin, an important oil- and gas-producing region in south-central Alaska.
Authors
D. L. LePain, Richard G. Stanley, K. P. Helmold, D.P. Shellenbaum
Nocturnal activity of nesting shrubland and grassland passerines: Chapter 9 Nocturnal activity of nesting shrubland and grassland passerines: Chapter 9
Nocturnal activity of nesting passerines is largely undocumented in field situations. We used video recordings to quantify sleep patterns of four shrubland and three grassland bird species during the nestling period. All species exhibited “back sleep” (bill tucked under scapular feathers); individuals woke frequently for vigils of their surroundings. Sleep-bout duration varied from 6...
Authors
Christy M. Slay, Kevin S. Ellison, Christine Ribic, Kimberly G. Smith, Carolyn M. Schmitz
40Ar/39Ar evidence for Late Devonian deformation in the Chester shear zone, east central Maine 40Ar/39Ar evidence for Late Devonian deformation in the Chester shear zone, east central Maine
No abstract available.
Authors
Hind Ghanem, Michael J. Kunk, Allan Ludman, David Bish, Robert Wintsch, Joseph Biasi
A river runs through it: conceptual models in fluvial geomorphology A river runs through it: conceptual models in fluvial geomorphology
No abstract available.
Authors
Gordon E. Grant, James E. O'Connor, M. Gordon Wolman
Abundance: Population size and density estimation Abundance: Population size and density estimation
Estimates of population size (total number of individuals) or density (number of individuals per unit area) are some of the most basic requirements for wildlife research and management. This article provides a brief overview of approaches for wildlife population estimation. These include habitat‐based approaches such as quadrat, line intercept, distance, and repeated count methods, as...
Authors
Mark S. Udevitz, William R. Gould
Accumulation of organic carbon-rich strata along the western margin and in the center of the North American western interior seaway during the Cenomanian-Turonian Transgression: Chapter 3 Accumulation of organic carbon-rich strata along the western margin and in the center of the North American western interior seaway during the Cenomanian-Turonian Transgression: Chapter 3
No abstract available.
Authors
W.E. Dean, E.G. Kauffman, M.A. Arthur
American Avocet (Recurvirostra americana) American Avocet (Recurvirostra americana)
This large, striking shorebird with long bluish-gray legs, a long recurved bill, and a black-and-white chevron pattern on its back and wings is one of four Avocet species in the world, the only one with distinct breeding and non-breeding plumages -- its grayish-white head and neck feathers become cinnamon in early spring as birds begin to form pairs and migrate to breeding areas.
Authors
Joshua T. Ackerman, C. Alex Hartman, Mark P. Herzog, John Y. Takekawa, Julie A. Robinson, Lewis W. Oring, Joseph P. Skorupa, Ruth Boettcher
Assessing and measuring wetland hydrology Assessing and measuring wetland hydrology
Virtually all ecological processes that occur in wetlands are influenced by the water that flows to, from, and within these wetlands. This chapter provides the “how-to” information for quantifying the various source and loss terms associated with wetland hydrology. The chapter is organized from a water-budget perspective, with sections associated with each of the water-budget components...
Authors
Donald O. Rosenberry, Masaki Hayashi
Blending local scale information for developing agricultural resilience in Ethiopia Blending local scale information for developing agricultural resilience in Ethiopia
This brief article looks at the intersection of climate, land cover/land use, and population trends in the world's most food insecure country, Ethiopia. As a result of warming in the Indian and Western Pacific oceans, Ethiopia has experienced substantial drying over the past 20 years. We intersect the spatial pattern of this drying with high resolution climatologies, maps of agricultural...
Authors
Christopher C. Funk, Gregory Husak, A.S Mahiny, Gary Eilerts, James Rowland
Capture-recapture methodology Capture-recapture methodology
Capture-recapture methods were initially developed to estimate human population abundance, but since that time have seen widespread use for fish and wildlife populations to estimate and model various parameters of population, metapopulation, and disease dynamics. Repeated sampling of marked animals provides information for estimating abundance and tracking the fate of individuals in the...
Authors
William R. Gould, William L. Kendall