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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: 6197
Lepidochelys kempii - Kemp's Ridley Lepidochelys kempii - Kemp's Ridley
No abstract available.
Authors
J.R. Schmid, William J. Barichivich
Impacts of landslide dams on mountain morphology Impacts of landslide dams on mountain morphology
Landslide dams can influence mountain-valley morphology significantly in the vicinity of the dam sites, as well as upstream and downstream. The effects are: (1) impoundment of lakes that result in changes in stream gradients, (2) deposition of lacustrine and deltaic sediments in these impoundments that causes changes in surficial morphology and geologic materials upstream from the dams,...
Authors
Robert L. Schuster
Ecological consequences of changing hydrological conditions in wetland forests of coastal Louisiana Ecological consequences of changing hydrological conditions in wetland forests of coastal Louisiana
Large-scale and localized alterations of processes affecting deltaic coastal wetlands have caused the complete loss of some coastal wetland forests and reduced the productivity and vigor of many areas in coastal Louisiana. This loss and degradation threatens ecosystem functions and the services they provide. This paper summarizes ecological relationships controlled by hydrological...
Authors
Richard F. Keim, J. L. Chambers, M.S. Hughes, J. Andrew Nyman, Craig A. Miller, Blake J. Amos, W.H. Conner, Jon Day, Stephen Faulkner, Emile S. Gardiner, Sammy L. King, K.W. McLeod, Gary P. Shaffer
Scientific action in the aftermath of Hurricanes Katrina and Rita Scientific action in the aftermath of Hurricanes Katrina and Rita
No abstract available.
Authors
Gaye S. Farris
Mass spectrometric in the analysis of inorganic substances Mass spectrometric in the analysis of inorganic substances
Mass spectrometry is an analytical technique used to measure the composition of a substance by isolating specific analyte components according to their individual atomic or molecular mass‐to‐charge ratios. Inorganic mass spectrometry is specifically used to determine the elemental and isotopic composition of the material being analyzed. The techniques are capable of the measurement of a...
Authors
Howard E. Taylor
Whales and whaling in the North Pacific Ocean and Bering Sea: Oceanographic insights and ecosystem impacts chapter 19 Whales and whaling in the North Pacific Ocean and Bering Sea: Oceanographic insights and ecosystem impacts chapter 19
No abstract available.
Authors
A. Springer, Gus B. Van Vliet, J. Pratt, E.M. Danner
The impact of invasive plants on tidal-marsh vertebrate species: common reed (Phragmites australis) and smooth cordgrass (Spartina alterniflora) as case studies The impact of invasive plants on tidal-marsh vertebrate species: common reed (Phragmites australis) and smooth cordgrass (Spartina alterniflora) as case studies
Large areas of tidal marsh in the contiguous US and the Maritime Provinces of Canada are threatened by invasive plant species. Our understanding of the impact these invasions have on tidal-marsh vertebrates is sparse. In this paper, we focus on two successful invasive plant taxa that have spread outside their native range --common reed (Phragmites australis) and smooth cordgrass...
Authors
Glenn R. Guntenspergen, J. Cully Nordby
Biomonitoring in North American rivers: A comparison of methods used for benthic macroinvertebrates in Canada and the United States Biomonitoring in North American rivers: A comparison of methods used for benthic macroinvertebrates in Canada and the United States
No abstract available.
Authors
James L. Carter, Vincent H. Resh, David M. Rosenberg, Trefor B. Reynoldson
Biomechanics and fisheries conservation Biomechanics and fisheries conservation
No abstract available.
Authors
Theodore R. Castro-Santos, Alexander Haro
An overview of the global variability in radiated energy and apparent stress An overview of the global variability in radiated energy and apparent stress
a global study of radiated seismic energies ER and apparent stresses τ a reveals systematic patterns. earthquakes with the highest apparent stress occur in regions of intense deformation and rupture strong lithosphere. in oceanic settings, these are strike-slip earthquakes (τ a up to 27 Mpa) occurring intraplate or at evolving ends of transform faults. at subduction zones and...
Authors
George Choy, Arthur F. McGarr, Stephen H. Kirby, John Boatwright
Multimodeling: new approaches for linking ecological models Multimodeling: new approaches for linking ecological models
The Everglades region of South Florida presents one of the major natural system management challenges facing the United States. With its assortment of alligators, crocodiles, manatees, panthers, large mixed flocks of wading birds, highly diverse subtropical flora, and sea of sawgrass, the ecosystem is unique in this country (Davis and Ogden 1994). The region is also perhaps the largest...
Authors
Louis J. Gross, Donald L. DeAngelis
Scouting craton’s edge in Paleo-Pacific Gondwana Scouting craton’s edge in Paleo-Pacific Gondwana
The geology of the ice-covered interior of the East Antarctic shield is completely unknown; inferences about its composition and history are based on extrapolating scant outcrops from the coast inland. Although the shield is clearly composite in nature, a large part of its interior has been represented by a single Precambrian block, termed the Mawson block, that includes the Archean
Authors
Carol A. Finn, John W. Goodge, Detlef Damaske, C. Mark Fanning