Population dynamics of neotropical migratory birds using agriculture-forest mosaics in Campeche, Mexico
M.H. Wilson, M. Berlanga, D. Dawson, P. Wood, J. Sauer, C.S. Robbins
Marcia H. Wilson, Steven A. Sader, editor(s)
1995, Book chapter, Conservation of Neotropical Migratory Birds in Mexico: Symposium-Workshop.
In many areas of the tropics, forests are being converted to agriculture and other uses at a rapid rate. Previous research has documented that forest-breeding migratory birds are distributed across a wide variety of habitat types during midwinter. However, to evaluate the relative importance of different habitat types to wintering...
Sample size and allocation of effort in point count sampling of birds in bottomland hardwood forests
W.P. Smith, D.J. Twedt, R.J. Cooper, D.A. Wiedenfeld, P.B. Hamel, R.P. Ford
C. John Ralph, John R. Sauer, Sam Droege, editor(s)
1995, Book chapter, Monitoring bird populations by point counts
To examine sample size requirements and optimum allocation of effort in point count sampling of bottomland hardwood forests, we computed minimum sample sizes from variation recorded during 82 point counts (May 7-May 16, 1992) from three localities containing three habitat types across three regions of the Mississippi Alluvial Valley (MAV)....
Population trends from the North American Breeding Bird Survey
B.G. Peterjohn, J.R. Sauer, C.S. Robbins
Thomas E. Martin, Deborah M. Finch, editor(s)
1995, Book chapter, Ecology and Management of Neotropical Migratory Birds: A Synthesis and Review of Critical Issues
INTRODUCTION: Most Neotropical migrant birds are difficult to count accurately and are moderately common over large breeding distributions. Consequently, little historical information exists on their large-scale population changes, and most of this information is anecdotal. Surveys begun in this century such as Breeding Bird Censuses and Christmas Bird Counts...
The use of multi-state capture-recapture models to address questions in evolutionary ecology
J.D. Nichols, W. L. Kendall
P.M. North, J.D. Nichols, editor(s)
1995, Book chapter, Statistics and ornithology. Proceedings of the 4th EURING technical meeting, 19-24 September, 1994
On the use of secondary capture-recapture samples to estimate temporary emigration and breeding proportions
W. L. Kendall, J.D. Nichols
P.M. North, J.D. Nichols, editor(s)
1995, Book chapter, Statistics and ornithology. Proceedings of the 4th EURING technical meeting, 19-24 September, 1994
The use of the Cormack- Jolly-Seber model under a standard sampling scheme of one sample per time period, when the Jolly-Seber assumption that all emigration is permanent does not hold, leads to the confounding of temporary emigration probabilities with capture probabilities. This biases the estimates of capture probability when...
The ecology of cormorants: some research needs and recommendations
R.M. Erwin
David N. Nettleship, David C. Duffy, editor(s)
1995, Book chapter, The double-crested cormorant: Biology, conservation, and management
Concerns about Double-crested Cormorants (Phalacrocorax auritus) have arisen because of their rapid population increase across North America and their economic impact on several aquaculture and commercial fish industries. In spite of the concern for cormorants, little published research is available that addresses either basic population biology questions or management issues....
Ecotoxicological damage from zinc smelting at Palmerton, Pennsylvania
W. Nelson Beyer, Gerald L. Storm
David J. Hoffman, Barnett A. Rattner, G. Allen Burton Jr., John Cairns Jr., editor(s)
1995, Book chapter, Handbook of ecotoxicology
The two zinc smelters at Palmerton, PA emitted huge amounts of contaminants ( 260,000 t of Zn, 3,300 t of Cd, 6,800 t of Pb) to the air and severely damaged the forest on Blue Mountain. The high Zn concentrations in soil killed tree seedlings by inhibiting root elongation. The...
Population modeling and its role in toxicological studies
John R. Sauer, Grey W. Pendleton
David J. Hoffman, Barnett A. Rattner, G. Allen Burton Jr., John Cairns Jr., editor(s)
1995, Book chapter, Handbook of ecotoxicology
A model could be defined as any abstraction from reality that is used to provide some insight into the real system. In this discussion, we will use a more specific definition that a model is a set of rules or assumptions, expressed as mathematical equations, that describe how animals survive...
Statistical aspects of point count sampling
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...
Handbook of ecotoxicology
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...
Coastal ecosystem decision‐support GIS: Functions and methodology
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...
Evolution of a trench-slope basin within the Cascadia subduction margin: The Neogene Humboldt Basin, California
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...
Seismic Sources and Recurrence Rates as Adopted by USGS Staff for the Production of the 1982 and 1990 Probabilistic Ground Motion Maps for Alaska and the Conterminous United States
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...
Water-quality characteristics of five tributaries to the Chesapeake Bay at the Fall Line, Virginia, July 1988 through June 1993
Donna L. Belval, Jean P. Campbell, Scott W. Phillips, Clifton F. Bell
1995, Water-Resources Investigations Report 95-4258
Development in the Chesapeake Bay region has adversely affected the water quality of the Bay. The general degradation in the Bay has resulted in the decline of commercial fishing industries and has reduced the area of aquatic vegetation that provides food and habitat for fish and shellfish. In order to...
Documented and potential extreme peak discharges and relation between potential extreme peak discharges and probable maximum flood peak discharges in Texas
William H. Asquith, Raymond M. Slade Jr.
1995, Water-Resources Investigations Report 95-4249
The U.S. Geological Survey, in cooperation with the Texas Department of Transportation, conducted a study of extreme flood potential for Texas. Potential extreme peak discharges, derived from the relation between documented extreme peak discharges and their contributing drainage areas, can provide valuable information concerning the maximum expected peak discharge that...
Listings of model values for the simulation of ground-water flow in the Cimarron River alluvium and terrace deposits from Freedom to Guthrie, Oklahoma
G. P. Adams
1995, Open-File Report 95-735
This report contains MODFLOW input and output listings for the simulation of ground-water flow in alluvium and terrace deposits associated with the Cimarron River from Freedom to Guthrie, Oklahoma. These values are to be used in conjuction with the report, 'Geohydrology of alluvium and terrace deposits of the Cimarron River...
Physical and hydrologic properties of outcrop samples from a nonwelded to welded tuff transition, Yucca Mountain, Nevada
C.A. Rautman, L. E. Flint, A. L. Flint, J.D. Istok
1995, Water-Resources Investigations Report 95-4061
Quantitative material-property data are needed to describe lateral and vertical spatial variability of physical and hydrologic properties and to model ground-water flow and radionuclide transport at the potential Yucca Mountain nuclear-waste repository site in Nevada. As part of ongoing site characterization studies of Yucca Mountain directed toward this understanding of...
Estimates of ground-water recharge rates for two small basins in central Nevada
R.W. Lichty, P. W. McKinley
1995, Water-Resources Investigations Report 94-4104
Estimates of ground-water recharge rates developed from hydrologic modeling studies are presented for 3-Springs and East Stewart basins. two small basins (analog sites) located in central Nevada. The analog-site studies were conducted to aid in the estimation of recharge to the paleohydrologic regime associated with ground water in the vicinity...
Conceptualization and simulation of runoff generation from rainfall for three basins in Thurston County, Washington
S.N. Berris
1995, Water-Resources Investigations Report 94-4038
A method to conceptualize and simulate the generation of runoff from rainfall was applied to three small drainage basins in north-central Thurston County, Washington. Because the study basins face continued urban development, this method was developed to provide a technique for assessing the effects of alternative urban-development plans on runoff...
Distribution and sources of nitrate, and presence of fluoride and pesticides, in parts of the Pasco Basin, Washington, 1986-88
J.C. Ebbert, S.E. Cox, B. W. Drost, K.M. Schurr
1995, Water-Resources Investigations Report 93-4197
Ground water was sampled in a 900-square-mile agricultural area in the Pasco Basin, which includes parts of eastern Benton County and western Franklin County, Washington, to determine distributions of nitrate and fluoride. Additional data were obtained to determine if fertilizers, irrigation water, septic systems, and naturally occurring nitrate are sources...
Water budgets, water quality, and analysis of nutrient loading of the Winter Park Chain of Lakes, central Florida, 1989-92, with a section on littoral vegetation
G. G. Phelps, E. R. German, Brian Beckage, W. Scott Gain
1995, Water-Resources Investigations Report 95-4108
The Winter Park chain of lakes (Lakes Maitland, Virginia, Osceola, and Mizell) has a combined area of about 900 acres, an immediate drainage area of about 3,100 acres, and mean depths ranging from 11 to 15 feet. The lakes are an important recreational resource for the surrounding communities, but there...
Digital maps of low- to moderate-temperature geothermal springs and wells in the Pacific Northwest: A contribution to the Interior Columbia Basin Ecosystem Management Project
Pamela D. Derkey, Bruce R. Johnson
1995, Open-File Report 95-689
No abstract available....
Simulation of ground-water flow in alluvial basins in south-central Arizona and parts of adjacent states
T. W. Anderson, G. W. Freethey
1995, Professional Paper 1406-D
Numerical modeling was used to examine the character of aquifer systems in alluvial basins in south-central Arizona. The report documents the modeling approach, design and calibration procedures, and results of simulations made by using specific and general models. Transferability of geohydrologic information among basins was tested and generally proved successful....
Precipitation depth-duration and frequency characteristics for Antelope Valley, Mojave Desert, California
J. C. Blodgett
1995, Water-Resources Investigations Report 95-4056
Methods to evaluate changes in the volume of storm runoff from drainage basins that are likely to be urbanized are needed by land-use planning agencies to establish criteria for the design of flood-control systems. To document the changes in runoff volume of basins that may be urbanized, nine small basins...
Hydrology and simulation of ground-water flow in the Aguadilla to Rio Camuy area, Puerto Rico
Patrick Tucci, M.I. Martinez
1995, Water-Resources Investigations Report 95-4028
The aquifers of the Aguadilla to Rio Camuy area, in the northwestern part of Puerto Rico, are the least developed of those on the north coast, and relatively little information is available concerning the ground-water system. The present study, which was part of a comprehensive appraisal of the ground-water resources...
