Publications
These publications showcase the significant science conducted in our Science Centers.
Filter Total Items: 16727
Early growth of roseate terns chicks as an index of parental quality Early growth of roseate terns chicks as an index of parental quality
No abstract available.
Authors
I.C.T. Nisbet, J. A. Spendelow, Jeff S. Hatfield, G. Gough, James M. Zingo
Estimates of managed waterfowl habitat on private lands in the Mississippi alluvial valley Estimates of managed waterfowl habitat on private lands in the Mississippi alluvial valley
No abstract available.
Authors
W.B. Uihlein, K. J. Reinecke, R.M. Kaminski
Monitoring Canadian bird populations with winter counts Monitoring Canadian bird populations with winter counts
Two winter bird surveys in Canada have range-wide population monitoring potential: Christmas Bird Counts (CBCs) and Project FeederWatch (PFW). CBC trends are shown to be correlated to Breeding Bird Survey (BBS) trends, whether or not part of the winter range lies outside the CBC coverage area. Some species are poorly covered by this survey (e.g. seabirds, nocturnal species, and...
Authors
Erica H. Dunn, J.R. Sauer
Riverine resources: water needs and environmental effects analyses in the Alabama- Coosa- Tallapoosa and Apalachicola- Chattahoochee- Flint River basins Riverine resources: water needs and environmental effects analyses in the Alabama- Coosa- Tallapoosa and Apalachicola- Chattahoochee- Flint River basins
No abstract available.
Authors
Mary C. Freeman, J.M. Nestler, P.N. Johnson
Maps showing the surficial geology of the Culebra shelf, Puerto Rico Maps showing the surficial geology of the Culebra shelf, Puerto Rico
This study presents the surficial and shallow subbottom geology of the insular shelf around Culebra, Puerto Rico. In view of the need for sand and gravel for construction purposes in the area, we inferred the thickness of unlithified, surficial sediment deposits from high-resolution acoustic-reflection profiles and described seafloor sediment samples collected with a Shipek grab.
Authors
M. A. Hampton, M.E. Torresan, Juan L. Trias, D. W. Folger, F. L. Wong
Coupled physical-biological models for the study of harmful algal blooms Coupled physical-biological models for the study of harmful algal blooms
No abstract available.
Authors
Peter J.S. Franks, Richard P. Signell
Cometabolic biodegradation of trichloroethylene in microcosms Cometabolic biodegradation of trichloroethylene in microcosms
Laboratory microcosms were used to determine the concentrations of oxygen (O2) and methane (CH4) that optimize trichloroethylene (TCE) biodegradation in sediment and ground-water samples from a TCE-contaminated aquifer at Picatinny Arsenal, Morris County, New Jersey. The mechanism for degradation is the cometabolic activity of methanotrophic bacteria. The laboratory data will be used to...
Authors
Allen C. Kane, Timothy P. Wilson, Jeffrey M. Fischer
Effects of simulated ground-water pumping and recharge on ground-water flow in Cape Cod, Martha's Vineyard, and Nantucket Island basins, Massachusetts Effects of simulated ground-water pumping and recharge on ground-water flow in Cape Cod, Martha's Vineyard, and Nantucket Island basins, Massachusetts
Three-dimensional transient ground-water-flow models that simulate both freshwater and saltwater flow were developed for the flow cells of the Cape Cod Basin to determine the effects of long-term pumping and recharge, seasonal fluctuations in pumping and recharge, and prolonged reductions of natural recharge, on the position of the freshwater-saltwater interface, water-table and pond...
Authors
John P. Masterson, Paul M. Barlow
Nitrate in ground water and stream base flow in the lower Susquehanna River Basin, Pennsylvania and Maryland Nitrate in ground water and stream base flow in the lower Susquehanna River Basin, Pennsylvania and Maryland
High concentrations of nitrate in both ground and surface water have been identified as a significant water-quality issue in the Lower Susquehanna River Basin. This report uses data collected by the National Water Quality Assessment (NAWQA) Program in the basin and compares nitrate concentrations found in ground water and surface water on both a spatial and temporal basis and relates...
Authors
Bruce D. Lindsey, Connie A. Loper, Robert A. Hainly
Identification of potential water-bearing zones by the use of borehole geophysics in the vicinity of Keystone Sanitation Superfund Site, Adams County, Pennsylvania, and Carroll County, Maryland Identification of potential water-bearing zones by the use of borehole geophysics in the vicinity of Keystone Sanitation Superfund Site, Adams County, Pennsylvania, and Carroll County, Maryland
Between April 23, 1996, and June 21, 1996, the U.S. Environmental Protection Agency contracted Haliburton-NUS, Inc., to drill four clusters of three monitoring wells near the Keystone Sanitation Superfund Site. The purpose of the wells is to allow monitoring and sampling of shallow, intermediate, and deep waterbearing zones for the purpose of determining the horizontal and vertical...
Authors
Randall W. Conger
Population dynamics of white-winged scoters Population dynamics of white-winged scoters
A significant (P 0.01) decline between 1961 and 1993 in ratio of harvested young per adult in the Atlantic Flyway (age ration) of white-winged scoters (Melanitta fusca) led us to examine annual survival rates and harvest of this species. Compared to waterfowl with similar life histories, black scoters (M. nigra) and surf scoters (M. perspicillata), the decline in age ratios of white...
Authors
David G. Krementz, P.W. Brown, F.P. Kehoe, C.S. Houston
Ground-water flow in the unconfined aquifer of the northern Barnegat Bay Watershed, New Jersey Ground-water flow in the unconfined aquifer of the northern Barnegat Bay Watershed, New Jersey
No abstract available.
Authors
Robert S. Nicholson, Martha K. Watt