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: 6049
Applied aspects of locomotion and biomechanics
Locomotion is the act and process of moving from place to place, which is fundamental to the life history of all mobile organisms. While the field of biomechanics encompasses the study of the physical constraints of what animals are capable of, ecological contexts require an integrated view that includes ecology and behavior. This chapter provides an overview of some of the areas where locomotion
Authors
Theodore R. Castro-Santos, Elsa Goerig, Pingguo He, George Lauder
Treading water: Conservation of headwater-stream associated amphibians in northwestern North America
Headwater streams of the Pacific Northwest of North America are home to 52 amphibian species, spanning a diversity of taxa and life histories. Headwater stream-associated amphibians occur both within coldwater-stream channels and throughout adjacent riparian habitat, reflective of the important role of old-growth forests in providing cool, moist microclimates for these sensitive species. Forests o
Authors
Lindsey Thurman, Christopher Cousins, Sky T. C. Button, Tiffany S. Garcia, Alysha Henderson, Deanna H. Olson, Jonah Piovia-Scott
Biosiliceous, organic-rich, and phosphatic facies of Triassic strata of northwest Alaska: Transect across a high-latitude, low-angle continental margin
The Shublik Formation (Middle and Upper Triassic) is a mixed siliciclastic-carbonate-phosphatic unit in northern Alaska. It generated oil found in Prudhoe Bay and other accumulations and is a prospective self-sourced resource play on Alaska’s North Slope. Its distal, deeper-water equivalent—the Otuk Formation—consists largely of radiolarian chert, mudstone, and limestone and contains potential gas
Authors
Julie A. Dumoulin, Katherine J. Whidden, William A. Rouse, Richard O. Lease, Adam Boehlke, Paul O'Sullivan
Wildlife population dynamics
In this chapter we provide an overview of some core concepts, describe exponential growth as the basic foundation for understanding population dynamics, and discuss some of the factors that can affect wildlife population dynamics. We then show how management insights that can be gained from analyzing the dynamics of individual age or stage classes, examine dynamics of multiple populations across a
Authors
L. Scott Mills, Heather E. Johnson
Structured decision making
No abstract available.
Authors
Michael C. Runge, J. Barry Grand, Michael S. Mitchell
Rapid ʻŌhiʻa Death in Hawaiʻi
Ceratocystis lukuohia and Ceratocystis huliohia are two newly recognized fungi that have arrived in Hawai‘i and are causing a serious vascular wilt and canker disease, respectively, of ‘ōhi‘a trees (Metrosideros polymorpha), the most common and important tree species in Hawai‘i. Management of these diseases has presented challenges due to unique etiological aspects and the exceptionally pathogenic
Authors
Philip Cannon, James B. Friday, Thomas Harrington, Lisa Keith, Marc Hughes, Rob Hauff, Flint Hughes, Ryan L. Perroy, David Benitez, Kylle Roy, Robert W. Peck, Sheri L. Smith, Blaine Luiz, Susan Cordell, Christian Giardina, Jennifer Juzwik, Stephanie G. Yelenik, Zachary Cook
Geochemical studies of the Green River Formation in the Piceance Basin, Colorado: II. Chemofacies from hierarchical cluster analysis
Hierarchical cluster analysis (HCA) was applied to a geochemical dataset representing the Eocene Green River Formation in the Piceance Basin of Colorado to identify chemofacies in core and outcrop samples from the basin margin and the basin center. The input dataset consisted of inductively coupled plasma optical emission spectroscopy and mass spectrometry and total organic carbon (TOC) content an
Authors
Tengfei Wu, Jeremy Boak, Justin E. Birdwell
Geologic characterization and depositional history of the Uteland Butte member, Green River Formation, southwestern Uinta Basin, Utah
The 15- to 65-m-thick informal Uteland Butte member of the Eocene Green River Formation represents the first widespread transgression of Lake Uinta in the Uinta Basin, Utah. This study assesses the spatial and temporal variation of Uteland Butte member deposits along a 40-km transect in the southwestern margin of the Uinta Basin using detailed measured sections, organic and inorganic geochemical d
Authors
Ryan D. Gall, Justin E. Birdwell, Riley Brinkerhoff, Michael D. Vanden Berg
Geochemical studies of the Green River Formation in the Piceance Basin, Colorado: I. Major, minor, and trace elements
The Eocene Green River Formation contains the largest oil shale deposits in the world and is a welldocumented example of a lacustrine depositional system. In addition, mineral resources associated with oil shale in the Piceance Basin nahcolite [NaHCO3] and dawsonite [NaAl(CO3)(OH)2)] are of current and potential economic value, respectively. Detailed geochemical analysis across the basin can aid i
Authors
Jeremy Boak, Tengfei Wu, Justin E. Birdwell
Geoelectric constraints on the Precambrian assembly and architecture of southern Laurentia
Using images from an updated and expanded three-dimensional electrical conductivity synthesis model for the contiguous United States (CONUS), we highlight the key continent-scale geoelectric structures that are associated with the Precambrian assembly of southern Laurentia. Conductivity anomalies are associated with the Trans-Hudson orogen, the Penokean suture, the ca. 1.8–1.7 Ga Cheyenne belt and
Authors
Benjamin Scott Murphy, Paul A. Bedrosian, Anna Kelbert
Butler’s Gartersnake, Thamnophis butleri (Cope 1889)
No abstract available.
Authors
Eric Thomas Hileman, Danielle R. Bradke