Publications
These publications showcase the significant science conducted in our Science Centers.
Filter Total Items: 16731
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
Aqueous-phase disappearance of atrazine, metolachlor, and chlorpyrifos in laboratory aquaria and outdoor macrocosms Aqueous-phase disappearance of atrazine, metolachlor, and chlorpyrifos in laboratory aquaria and outdoor macrocosms
Dissipation processes are described for a combination of commonly used pesticides—atrazine (6-chloro-4-ethylamino-6-isopropylamino-s-triazine), metolachlor (2-chloro-N-[2-ethyl-6-methyl-phenyl]-N-[2-methoxy-1-methylethyl] acetamide), and chlorpyrifos (O-O diethyl O-[3,5,6-trichloro-2-pyridinyl] phosphorothioate)—in a laboratory and outdoor pond systems. Dosing rates and timing were...
Authors
L. Mazanti, C. Rice, K. Bialek, D. Sparling, C. Stevenson, W.E. Johnson, P. Kangas, J. Rheinstein
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
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
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
Storms as agents of wetland elevation change: their impact on surface and subsurface sediment processes Storms as agents of wetland elevation change: their impact on surface and subsurface sediment processes
Direct measures of the impact of major storms on wetland sediment elevation are rare. Recently developed techniques have enabled simultaneous, quantitative observations of surface and subsurface processes affecting sediment elevation. An analysis of ten wetland sites revealed the following patterns of sediment elevation change after storm passage: (1) elevation change equivalent to...
Authors
Donald R. Cahoon
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
Population modeling Population modeling
No abstract available.
Authors
John R. Sauer, Grey W. Pendleton
Wildlife toxicology of organophosphorus and carbamate pesticides Wildlife toxicology of organophosphorus and carbamate pesticides
No abstract available.
Authors
Elwood F. Hill
Global GIS database. Digital atlas of planet Earth Global GIS database. Digital atlas of planet Earth
No abstract available.
Authors
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