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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: 6158
Bed texture and turbidity as indicators of fish biotic integrity in the Etowah River system Bed texture and turbidity as indicators of fish biotic integrity in the Etowah River system
No abstract available.
Authors
D.M. Walters, Mary C. Freeman, D.S. Leigh, B. J. Freeman, M.J. Paul, C. M. Pringle
Biodiversity losses: The downward spiral Biodiversity losses: The downward spiral
The dramatic decline of whitebark pine (Pinus albicaulis) populations in the northwestern United States and southwestern Canada from the combined effects of fire exclusion, mountain pine beetles (Dendroctonus ponderosae), and white pine blister rust (Cronartium ribicola), and the projected decline of whitebark pine populations rangewide (Chapters 10 and 11) do not simply add up to local
Authors
Diana F. Tomback, Katherine C. Kendall
Biological diversity of created forested wetlands in comparison to reference forested wetlands in the Bay watershed Biological diversity of created forested wetlands in comparison to reference forested wetlands in the Bay watershed
Amphibians, reptiles, birds, and mammals were surveyed at six created forested wetlands in central Maryland and at six adjacent reference forested wetlands during 1993-1996 to determine comparative biological diversity of these habitats. Amphibians and reptiles were caught in pitfall and funnel traps associated with 15.4m (50 ft) drift fences. Birds were surveyed with a complete count...
Authors
Matthew C. Perry, P.C. Osenton, C.S. Stoll
Biological evaluation of the behavioral guidance structure at Lower Granite dam on the Snake River, Washington in 1998 Biological evaluation of the behavioral guidance structure at Lower Granite dam on the Snake River, Washington in 1998
Abstract not available
Authors
N.S. Adams, G. E. Johnson, D.W. Rondorf, S.M. Anglea, T. Wik
Chemical weathering of the Panola Granite: Solute and regolith elemental fluxes and the weathering rate of biotite Chemical weathering of the Panola Granite: Solute and regolith elemental fluxes and the weathering rate of biotite
Present-day elemental and mineral weathering rates based on solute fluxes are compared quantitatively to past long-term rates determined from solid-state elemental fractionation in a saprolitic granite regolith at Panola, Georgia, USA. Saturated fluid flow across a low-permeability kaolin duripan controls the rate of steady-state unsaturated flow in the underlying saprolite. Water and Cl...
Authors
Art F. White, Alex E. Blum, Marjorie S. Schulz, Thomas G. Huntington, Norman E. Peters, David A. Stonestrom
Coastal sage scrub case study Coastal sage scrub case study
In ecological applications of large-scale spatial data to management decisions concerning land planning and conservation, errors and biases may creep into the analysis and decision making at several steps (see Chaps. 1, 2, and 3), including:• Uncertainty in positions of spatial locations of relevant ecological and physiographic features of the landscape.• Uncertainty of the type and...
Authors
T. J. Case, Robert N. Fisher
Construction and destruction of crinoidal mudmounds on Mississippian Antler forebulge, east of Eureka, Nevada Construction and destruction of crinoidal mudmounds on Mississippian Antler forebulge, east of Eureka, Nevada
No abstract available.
Authors
Charles Sandberg, Forrest G. Poole, Jared R. Morrow
Contributions of atmospheric nitrogen deposition to U.S. estuaries: Summary and conclusions: Chapter 8 Contributions of atmospheric nitrogen deposition to U.S. estuaries: Summary and conclusions: Chapter 8
A NOAA project was initiated in 1998, with support from the U.S. EPA, to develop state-of-the-art estimates of atmospheric N deposition to estuarine watersheds and water surfaces and its delivery to the estuaries. Work groups were formed to address N deposition rates, indirect (from the watershed) yields from atmospheric and other anthropogenic sources, and direct deposition on the...
Authors
Paul E. Stacey, Holly Greening, James N. Kremer, David Peterson, David A. Tomasko
Deposition of sedimentary organic matter in black shale facies indicated by the geochemistry and petrography of high-resolution samples, blake nose, western North Atlantic Deposition of sedimentary organic matter in black shale facies indicated by the geochemistry and petrography of high-resolution samples, blake nose, western North Atlantic
A transect of three holes drilled across the Blake Nose, western North Atlantic Ocean, retrieved cores of black shale facies related to the Albian Oceanic Anoxic Events (OAE) lb and ld. Sedimentary organic matter (SOM) recovered from Ocean Drilling Program Hole 1049A from the eastern end of the transect showed that before black shale facies deposition organic matter preservation was a...
Authors
C.E. Barker, M. Pawlewicz, E.A. Cobabe
Determining the ecological footprint of recreation activities to support management decision Determining the ecological footprint of recreation activities to support management decision
This paper reviews recreation impacts, impact monitoring methods, and impact management strategies and actions for managing visitation in mountain environments.
Authors
J. L. Marion
Development of a bird banding recapture database Development of a bird banding recapture database
Recaptures (and resightings) constitute the vast majority of post-release data from banded or otherwise marked nongame birds. A powerful suite of contemporary analytical models is available for using recapture data to estimate population size, survival rates and other parameters, and many banders collect recapture data for their project specific needs. However, despite widely recognized...
Authors
J. Tautin, P.F. Doherty, L. Metras