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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.
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: 6155
Suspended particle transport and circulation in San Francisco Bay - an overview Suspended particle transport and circulation in San Francisco Bay - an overview
Differences in the relative magnitude and timing of wind stress and river inflow in the northern and southern reaches of San Francisco Bay create different sedimentary conditions. The northern reach is a partially to well mixed estuary receiving most of the total annual fresh-water input (840 m3 sec−1) and suspended sediment input (4 × 106metric tons) into the bay; more than 80% of the...
Authors
T. J. Conomos, D. H. Peterson
The current status of woodcock and woodcock surveys in the United States The current status of woodcock and woodcock surveys in the United States
A comparison of American woodcock (Philohela minor) wing collection survey data for 1975-76 and 1976-77 showed that there was little change in the indices to breeding success and hunter success between years in the Atlantic and Central regions. The 1977 breeding population index was up 15.2 percent from 1976 in the Central region and static in the Atlantic region. There is a long-term...
Authors
J. Tautin
The study of chemical communication in free-ranging mammals The study of chemical communication in free-ranging mammals
No abstract available.
Authors
L.D. Mech, R.P. Peters
Woodcock utilization of commercial timberlands in the northeast Woodcock utilization of commercial timberlands in the northeast
This paper reports the results of studies in Maine (1975-77) and New Brunswick (1974) on the utilization of commercial timber areas by woodcock (Philohela minor). Openings created by logging operations were utilized for singing grounds and nocturnal roosting habitat. Singing male densities of 3.4 birds/1oo ha on were found on New Brunswick elearcuts, 0.24 birds/IOO ha on northern Maine...
Authors
C.P. Nicholson, S. Homer, Ray B. Owen, T.G. Dilworth
Interstitial waters of marine sediments Interstitial waters of marine sediments
No abstract available.
Authors
Frank T. Manheim
The four Jurassic belts of northern California and their significance to the geology of the southern California borderland The four Jurassic belts of northern California and their significance to the geology of the southern California borderland
No abstract available.
Authors
D. L. Jones, M. Clark Blake, C. Rangin
Federal agency requirements example—Department of the Interior Federal agency requirements example—Department of the Interior
No abstract available.
Authors
G. A. Thorley
Thermal effects on fish ecology Thermal effects on fish ecology
Of all the environmental factors that influence aquatic organisms, temperature is the most all-pervasive. There is always an environmental temperature while other factors may or may not be present to exert their effects. Fish are, for all practical purposes, thermal conformers, or obligate poikilotherms. That is, they are able to exert little significant influence on maintaining a...
Authors
Charles C. Coutant
Magnetic measurements of Lake Yogo samples Magnetic measurements of Lake Yogo samples
No abstract available.
Authors
Thor N. V. Karlstrom
Textural variation within Great Salt Lake algal mounds Textural variation within Great Salt Lake algal mounds
This chapter discusses textural variation within the Great Salt Lake algal mounds. Great Salt Lake algal mounds contain: (1) a framework of non-skeletal, algally induced aragonite precipitates; (2) internal sediment; and (3) inorganic cement. These three elements create a variety of laminated, poorly laminated, and unlaminated internal textures. Interior framework precipitates bear...
Authors
Robert B. Halley