Publications
These publications showcase the significant science conducted in our Science Centers.
Filter Total Items: 16733
Combining landsat thematic mapper imagery with terrain variables to map eastern hemlock (Tsuga canadensis) in Shenandoah National Park Combining landsat thematic mapper imagery with terrain variables to map eastern hemlock (Tsuga canadensis) in Shenandoah National Park
No abstract available at this time
Authors
D.D. Morton, J.A. Young, N.M. Thomsen
Ecology of stream fish: Insights gained from an individual-based approach to juvenile Atlantic salmon Ecology of stream fish: Insights gained from an individual-based approach to juvenile Atlantic salmon
Using data from an ongoing study of juvenile Atlantic salmon growth and survival in tributaries of the Connecticut River, USA, we compare standard population-level approaches to those focusing on individuals. We highlight the potential benefits of resampling individually tagged stream fish as compared to standard approaches. Specifically we focus on growth, survival, movements and...
Authors
J. Juanes, B.H. Letcher, G. Gries
Contaminant distribution and accumulation in the surface sediments of Long Island Sound Contaminant distribution and accumulation in the surface sediments of Long Island Sound
The distribution of contaminants in surface sediments has been measured and mapped as part of a U.S. Geological Survey study of the sediment quality and dynamics of Long Island Sound. Surface samples from 219 stations were analyzed for trace (Ag, Ba, Cd, Cr, Cu, Hg, Ni, Pb, V, Zn and Zr) and major (Al, Fe, Mn, Ca, and Ti) elements, grain size, and Clostridium perfringens spores...
Authors
E.L. Mecray, Marilyn R. Buchholtz ten Brink
Geochemical investigations by the U.S. Geological Survey on uranium mining, milling, and environmental restoration Geochemical investigations by the U.S. Geological Survey on uranium mining, milling, and environmental restoration
Recent research by the U.S. Geological Survey has characterized contaminant sources and identified important geochemical processes that influence transport of radionuclides from uranium mining and milling wastes. 1) Selective extraction studies indicated that alkaline earth sulfates and hydrous ferric oxides are important hosts of 226Ra in uranium mill tailings. The action of sulfate...
Authors
Edward R. Landa, Charles A. Cravotta, David L. Naftz, Philip L. Verplanck, D. Kirk Nordstrom, Robert A. Zielinski
Developments in fish passage engineering and biology Developments in fish passage engineering and biology
No abstract available at this time
Authors
M. Odeh, A. Haro
Thiamine status of Tennessee and Great Lakes walleye populations: Report on early mortality syndrome workshop Thiamine status of Tennessee and Great Lakes walleye populations: Report on early mortality syndrome workshop
No abstract available at this time
Authors
D. C. Honeyfield, C.S. Vandergoot, P.W. Bettoli, J. P. Hinterkopf, J.L. Zajicek
The northeastern states' waterfowl breeding population survey The northeastern states' waterfowl breeding population survey
Efforts to tailor waterfowl hunting regulations to conditions in the Atlantic Flyway have been hampered by lack of information on local breeding populations. The Atlantic Flyway Council's technical section voted at its 1987 winter meeting (Atlantic Flyway Council Technical Section, Toronto, Canada) to establish a regional waterfowl breeding survey. Consequently, an annual survey was...
Authors
H.W. Heusmann, J.R. Sauer
Comparison of line transects and point counts for monitoring spring migration in forested wetlands Comparison of line transects and point counts for monitoring spring migration in forested wetlands
We compared the efficacy of 400-m line transects and sets of three point counts at detecting avian richness and abundance in bottomland hardwood forests and intensively managed cottonwood (Populus deltoides) plantations within the Mississippi Alluvial Valley. We detected more species and more individuals on line transects than on three point counts during 218 paired surveys conducted...
Authors
R.R. Wilson, D.J. Twedt, A.B. Elliott
Use of contour maps of water depths to predict flora and fauna abundance in moist soil management Use of contour maps of water depths to predict flora and fauna abundance in moist soil management
No abstract available.
Authors
Matthew C. Perry, B. Bauman, G.A. Gough, E.J.R. Lohnes
Relation of waterfowl poisoning to sediment lead concentrations in the Coeur d'Alene River Basin Relation of waterfowl poisoning to sediment lead concentrations in the Coeur d'Alene River Basin
For many years, waterfowl have been poisoned by lead after ingesting contaminated sediment in the Coeur d'Alene River Basin, in Idaho. Results of studies on waterfowl experimentally fed this sediment were combined with results from field studies conducted in the Basin to relate sediment lead concentration to injury to waterfowl. The first step in the model estimated exposure as the...
Authors
W. N. Beyer, D. J. Audet, G. H. Heinz, D. J. Hoffman, D. Day
A radio transmitter attachment technique for soras A radio transmitter attachment technique for soras
We modified a figure-8 leg-loop harness designed for small passerines to attach successfully 1.8-g radio transmitters over the synsacrum of migrant Soras (Porzana carolina). Because of the short caudal region of Soras, addition of a waist loop was critical to securing the transmitter while leg loops were maintained to center the package. Thin gauge (0.6-mm diameter) elastic thread proved...
Authors
G. Michael Haramis, Gregory D. Kearns
Effects of forest management on density, survival, and population growth of wood thrushes Effects of forest management on density, survival, and population growth of wood thrushes
Loss and alteration of breeding habitat have been proposed as causes of declines in several Neotropical migrant bird populations. We conducted a 4-year study to determine the effects of winter prescribed burning and forest thinning on breeding wood thrush (Hylocichla mustelina) populations at the Piedmont National Wildlife Refuge (PNWR) in Georgia. We estimated density, adult and...
Authors
L.A. Powell, J. D. Lang, M.J. Conroy, D.G. Krementz