C.J. Ralph, Sam Droege, J.R. Sauer
1995, Book chapter, Monitoring Bird Populations by Point Counts
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Publication Extents
Not all publications have extents, not all extents are completely accurateG.W. Pendleton
C. John Ralph, John R. Sauer, Sam Droege, editor(s)
1995, Book chapter, Monitoring bird populations by point counts
Many factors affect the use of point counts for monitoring bird populations, including sampling strategies, variation in detection rates, and independence of sample points. The most commonly used sampling plans are stratified sampling, cluster sampling, and systematic sampling. Each of these might be most useful for different objectives...
R. Michael Erwin
Edward T. LaRoe, Gaye S. Farris, Catherine E. Puckett, Peter D. Doran, Michael J. Mac, editor(s)
1995, Book chapter, Our living resources: A report to the nation on the distribution, abundance, and health of U.S. plants, animals, and ecosystems
Colonial waterbirds, that is, seabirds (gulls, terns, cormorants, pelicans) and wading birds (herons, egrets, ibises), have attracted the attention of scientists, conservationists, and the public since the turn of the century when plume hunters nearly drove many species to extinction. The first national wildlife refuge at Pelican Island, Florida, was...
George F. Gee, Scott G. Hereford
Edward T. LaRoe, Gaye S. Farris, Catherine E. Puckett, Peter D. Doran, Michael J. Mac, editor(s)
1995, Book chapter, Our living resources: A report to the nation on the distribution, abundance, and health of U.S. plants, animals, and ecosystems
Resident sandhill cranes formed a continuous population in Georgia and Florida and widely separated populations along the Gulf Coastal Plain of Texas, Louisiana, Mississippi, and Alabama (Figure). The Mississippi sandhill crane (Grus canadensis pulla) was one of the widely separated populations on the Coastal Plain that bred in pine savannas...
Oliver H. Pattee, Robert Mesta
Edward T. LaRoe, Gaye S. Farris, Catherine E. Puckett, Peter D. Doran, Michael J. Mac, editor(s)
1995, Book chapter, Our living resources: A report to the nation on the distribution, abundance, and health of U.S. plants, animals, and ecosystems
The California condor (Gymnogyps californianus) is a member of the vulture family. With a wingspan of about 3 m (9 ft) and weighing about 9 kg (20 lb), it spends much of its time in soaring flight visually seeking dead animals as food. The California condor has always been rare...
R. J. Barker, J.R. Sauer
C.J. Ralph, J.R. Sauer, Sam Droege, editor(s)
1995, Book chapter, Monitoring Bird Populations by Point Counts.
The dominant feature of point counts is that they do not census birds, but instead provide incomplete counts of individuals present within a survey plot. Considering a simple model for point count sampling, we demon-strate that use of these incomplete counts can bias estimators and testing procedures, leading to...
J. Price, Sam Droege, A. Price
1995, Book
The North American Breeding Bird Survey comprises a network of regularly censussed, road-based survey routes and constitutes the most comprehensive set of data on the relative abundance and population trends of these birds during the summer months. Its value was highlighted in 1989, when the data were used to confirm...
K.J. Chiavetta, editor(s)
1995, Book
Y.-F. Leung, J. L. Marion
1995, Book
David J. Hoffman, Barnett A. Rattner, G. Allen Burton Jr., John Cairns Jr., editor(s)
1995, Book
The Handbook of Ecotoxicology offers 34 chapters with contributions from over 50 selected international experts. The book is divided into four major sections: I. Quantifying and Measuring Ecotoxicological Effects, II. Contaminant Sources and Effects, III. Case Histories and Ecosystem Surveys, and IV. Methods for Making Estimates and Predictability in...
Wei Ji, James B. Johnson
1995, Marine Geodesy (18) 229-241
To solve coastal resource and environmental issues and handle complex spatial data and information effectively and efficiently, a coastal ecosystem decision‐support geographic information system (GIS) is being developed at the Southern Science Center of the U.S. National Biological Service. With three subsystems, natural resource management, environmental impact assessment, and data...
G. B. Rathbun
1995, Mammal Review (25) 79-86
The recommendations and implementation of the IUCN conservation plan for African Insectivora and elephant-shrews (Nicoll & Rathbun, 1990) are reviewed. Of the 33 species and subspecies of elephant-shrews, only six forest-dwelling taxa are threatened. Until additional status data are gathered, assessed, and published no changes in the IUCN threatened categories...
Federal Geographic Data Committee
1995, Report
This proposal of a data framework to organize and enhance the activities of the geospatial data community to meet needs for basic themes of data was developed in response to a request in Executive Order 12906, Coordinating Geographic Data Acquisition and Access: The National Spatial Data Infrastructure (U.S. Executive Office...
Elijah Ramsey III
1995, International Journal of Remote Sensing (16) 2495-2502
Satellite radar was used in a Florida Juncus roemerianus marsh to map tidal flooding, a critical control of coastal vegetation distribution. Radar images taken during a time of near-continuous recordings of ground-based hydrology measurements directly linked marsh flooding to lowered radar returns and indicated a negative covariation between flood frequency and radar...
Patricia A. McCrory
1995, Sedimentology (42) 223-247
The Neogene Humboldt (Eel River) Basin is located along the north-eastern margin of the Pacific Ocean within the Cascadia subduction zone. This sedimentary basin originated near the base of the accretionary prism in post-Eocene time. Subduction processes since that time have elevated strata in the south-eastern portion of the basin...
Dorothy K. Hall, Richard S. Williams Jr., Oddur Sigurdsson
1995, Annals of Glaciology (21) 271-276
The first European Remote Sensing Satellite (ERS-1) synthetic aperture radar (SAR) images offer opportunities for studying glacier surface properties and near-surface features. Analysis of back-scatter values from digital SAR data from 18 January, 7 June, 1 September and 25 October 1993 of Brúarjökull, an outlet glacier on the northeastern margin...
Stanley L. Hanson, David M. Perkins
1995, Open-File Report 95-257
The construction of a probabilistic ground-motion hazard map for a region follows a sequence of analyses beginning with the selection of an earthquake catalog and ending with the mapping of calculated probabilistic ground-motion values (Hanson and others, 1992). An integral part of this process is the creation of sources used...
P. K. Link, J. B. Mahoney, D. J. Bruner, L. D. Batatian, Eric Wilson, F. J. C. Williams
1995, Bulletin 2064-C
The paper version of the Geologic map of outcrop areas of sedimentary units in the eastern part of the Hailey 1x2 Quadrangle and part of the southern part of the Challis 1x2 Quadrangle, south-central Idaho was compiled by Paul Link and others in 1995. The plate was compiled...
R. G. Worl, K. M. Johnson
1995, Bulletin 2064-A
The paper version of Map Showing Geologic Terranes of the Hailey 1x2 Quadrangle and the western part of the Idaho Falls 1x2 Quadrangle, south-central Idaho was compiled by Ron Worl and Kate Johnson in 1995. The plate was compiled on a 1:250,000 scale topographic base map. TechniGraphic System, Inc. of...
Bruce H. Pugesek
1995, Animal Behaviour (49) 641-647
Measures of adult feeding and foraging behaviour in the California gull, Larus californicus, were related to the growth of their offspring. Offspring showed significantly higher growth when average feeding interval, a measure of the time interval between feedings, and feeding latency following foraging decreased. The amount of time parents foraged was...
Ingrid M. Verstraeten, M. J. Ellis
1995, Water-Resources Investigations Report 94-4197
A reconnaissance of ground-water quality was conducted in the Papio-Missouri River Natural Resources District of eastern Nebraska. Sixty-one irrigation, municipal, domestic, and industrial wells completed in the principal aquifers--the unconfined Elkhorn, Missouri, and Platte River Valley alluvial aquifers, the upland area alluvial aquifers, and the Dakota aquifer--were selected for water-quality...
Water Resources Division, U.S. Geological Survey
1995, Fact Sheet 003-95
Larry M. Pope
1995, Fact Sheet 196-95
Since about 1960, atrazine has been used as an effective pre- and postemergent herbicide in the production of corn and grain sorghum. Atrazine is a triazine-class herbicide and was the most frequently detected herbicide in surface water of the lower Kansas River Basin of southeast Nebraska and northeast Kansas (Stamer...
Jon J. Major
1995, Fact Sheet 028-94
Geologists commonly infer the flow conditions and the physical properties of debris flows from the sedimentologic, stratigraphic, and morphologic characteristics of their deposits. However, such inferences commonly lack corroboration by direct observation because the capricious nature of debris flows makes systematic observation and measurement of natural events both difficult and...
C. A. Finn
1995, Open-File Report 95-212