Publications
These publications showcase the significant science conducted in our Science Centers.
Filter Total Items: 16905
Histories of Puerto Rican parrot nests in the Caribbean National Forest/Luquillo Experimental Forest, 1973-2000 Histories of Puerto Rican parrot nests in the Caribbean National Forest/Luquillo Experimental Forest, 1973-2000
This publication summarizes the histories of all known Puerto Rican parrot nests in the Caribbean National Forest/Luquillo Experimental Forest from 1973 through 2000. Included for each nest, when known, are the identifies of the pair, clutch size, known fertile and infertile eggs, number of eggs that hatched, number of chicks that survived, sources of mortality, fostering (source...
Authors
J.M. Wunderle, N.F.R. Snyder, B. Muiznieks, J. W. Wiley, J.M. Meyers
Effects of contaminants on soil ecosystem structure and function Effects of contaminants on soil ecosystem structure and function
No abstract available.
Authors
R.S. Wentsel, W. N. Beyer, C.A. Edwards, L.A. Kapustka, R.G. Kuperman
Population modeling Population modeling
No abstract available.
Authors
John R. Sauer, Grey W. Pendleton
West Nile Virus vaccination and challenge in sandhill cranes (Grus canadensis) West Nile Virus vaccination and challenge in sandhill cranes (Grus canadensis)
No abstract available.
Authors
Glenn H. Olsen, Kimberli J.G. Miller, D. Docherty, L. Sileo
Estimation of change in populations and communities from monitoring survey data Estimation of change in populations and communities from monitoring survey data
Monitoring surveys provide fundamental information for use in environmental decision making by permitting assessment of both current population (or community) status and change in status, by providing a historical context of the present status, and by documenting response to ongoing management. Conservation of species and communities has historically been based upon monitoring...
Authors
J.R. Sauer, W.A. Link, J.D. Nichols
Gas transfer velocities measured at low wind speed over a lake Gas transfer velocities measured at low wind speed over a lake
The relationship between gas transfer velocity and wind speed was evaluated at low wind speeds by quantifying the rate of evasion of the deliberate tracer, SF6, from a small oligotrophic lake. Several possible relationships between gas transfer velocity and low wind speed were evaluated by using 1-min-averaged wind speeds as a measure of the instantaneous wind speed values. Gas transfer...
Authors
John Crusius, R. Wanninkhof
Water Resources Data, Pennsylvania, Water Year 2002, Volume 2. Susquehanna and Potomac River Basins Water Resources Data, Pennsylvania, Water Year 2002, Volume 2. Susquehanna and Potomac River Basins
Water-resources data for the 2002 water year for Pennsylvania consists of records of discharge and water quality of streams; contents and elevations of lakes and reservoirs; and water levels and water quality of ground-water wells. This report, Volume 2 contains (1) discharge records for 82 continuous-record streamflow-gaging stations, 13 partial-record stations, 24 special study and...
Authors
Randall R. Durlin, William P. Schaffstall
Global GIS database. Digital atlas of planet Earth Global GIS database. Digital atlas of planet Earth
No abstract available.
Authors
Forty-fourth supplement to the American Ornithologists' Union Check-list of North American birds Forty-fourth supplement to the American Ornithologists' Union Check-list of North American birds
This is the third Supplement since publication of the 7th edition of the Check-list of North American Birds (American Ornithologists' Union [AOU] 1998). It summarizes decisions made by the AOU's Committee on Classification and Nomenclature between 1 January 2002 and 31 December 2002.
Authors
Richard C. Banks, C. Cicero, J.L. Dunn, A.W. Kratter, P.C. Rasmussen, J.V. Remsen, J.D. Rising, D.F. Stotz
Windows of opportunity: white-tailed deer and the dynamics of northern hardwood forests of the northeastern US Windows of opportunity: white-tailed deer and the dynamics of northern hardwood forests of the northeastern US
Herbivory, lighting regimes, and site conditions are among the most important determinants of forest regeneration success, but these are affected by a host of other factors such as weather, predation, human exploitation, pathogens, wind and fire. We draw together > 50 years of research on the Huntington Wildlife Forest in the central Adirondack Mountains of New York to explore...
Authors
R.W. Sage, W.F. Porter, H.B. Underwood
Effects of pulsed, high-velocity water flow on larval robust redhorse and V-lip redhorse Effects of pulsed, high-velocity water flow on larval robust redhorse and V-lip redhorse
The pulsed, high-velocity water flow characteristic of water-flow patterns downstream from hydropower-generating dams has been implicated in the declining abundance of both aquatic insects and fishes in dam-regulated rivers. This study examined the effects of 0, 4, and 12 h per day of pulsed, high-velocity water flow on the egg mortality, hatch length, final length, and survival of...
Authors
R.S. Weyers, Cecil A. Jennings, Mary C. Freeman
A Visual Basic program to classify sediments based on gravel-sand-silt-clay ratios A Visual Basic program to classify sediments based on gravel-sand-silt-clay ratios
Nomenclature describing size distributions is important to geologists because grain size is the most basic attribute of sediments. Traditionally, geologists have divided sediments into four size fractions that include gravel, sand, silt, and clay, and classified these sediments based on ratios of the various proportions of the fractions. Definitions of these fractions have long been...
Authors
L. J. Poppe, A.H. Eliason, M. E. Hastings