Publications
These publications showcase the significant science conducted in our Science Centers.
Filter Total Items: 16746
Approaches for the direct estimation of rate of increase in population size using capture-recapture data Approaches for the direct estimation of rate of increase in population size using capture-recapture data
Recent developments in the modeling of capture-recapture data permit the direct estimation and modeling of population growth rate Pradel (1996). Resulting estimates reflect changes in numbers of birds on study areas, and such changes result from movement as well as survival and reproductive recruitment. One measure of the 'importance' of a demographic vital rate to population growth is...
Authors
J.D. Nichols, T. Scott Sillett, J.E. Hines, Richard T. Holmes
Dendrobates auratus Girard, 1855: green and black dart-poison frog Dendrobates auratus Girard, 1855: green and black dart-poison frog
No abstract available.
Authors
M.J. Lannoo, P. Nanjappa
The effect of varying protein levels on blood chemistry, food consumption, and behavior of captive seaducks The effect of varying protein levels on blood chemistry, food consumption, and behavior of captive seaducks
The Chesapeake Bay is a primary wintering area for scoters and the long-tailed ducks (Clangia hyemalis) that migrate along the Atlantic Flyway. Recently, the Chesapeake Bay had undergone an ecosystem shift and little is known about how this is affecting the seaduck populations. We are determining what are the preferred food sources of the seaducks wintering on the Bay and analyzing the...
Authors
A. M. Wells-Berlin, Matthew C. Perry, Glenn H. Olsen
Biological objectives for bird populations Biological objectives for bird populations
No abstract available.
Authors
J. Bart, M. Koneff, S. Wendt
usSEABED: Atlantic coast offshore surficial sediment data release usSEABED: Atlantic coast offshore surficial sediment data release
No abstract available.
Authors
Jamey M. Reid, Jane A. Reid, Chris J. Jenkins, Mary E. Hastings, S. Jeffress Williams, Larry J. Poppe
A calibration pad facility for gamma-ray spectrometers at the U.S. Geological Survey in Reston, Virginia A calibration pad facility for gamma-ray spectrometers at the U.S. Geological Survey in Reston, Virginia
No abstract available.
Authors
Joseph S. Duval1, Stephen L. Snyder
Water level dynamics in wetlands and nesting success of Black Terns in Maine Water level dynamics in wetlands and nesting success of Black Terns in Maine
The Black Tern (Chlidonias niger) nests in freshwater wetlands that are prone to water level fluctuations, and nest losses to flooding are common. We examined temporal patterns in water levels at six sites with Black Tern colonies in Maine and determined probabilities of flood events and associated nest loss at Douglas Pond, the location of the largest breeding colony. Daily...
Authors
Andrew T. Gilbert, F. A. Servello
Strange bedfellows - A deep-water hermatypic coral reef superimposed on a drowned barrier island; Southern Pulley Ridge, SW Florida platform margin Strange bedfellows - A deep-water hermatypic coral reef superimposed on a drowned barrier island; Southern Pulley Ridge, SW Florida platform margin
The southeastern component of a subtle ridge feature extending over 200 km along the western ramped margin of the south Florida platform, known as Pulley Ridge, is composed largely of a non-reefal, coastal marine deposit. Modern biostromal reef growth caps southern Pulley Ridge (SPR), making it the deepest hermatypic reef known in American waters. Subsurface ridge strata are layered...
Authors
B. D. Jarrett, A. C. Hine, R. B. Halley, D. F. Naar, S. D. Locker, A.C. Neumann, D. Twichell, C. Hu, B.T. Donahue, W.C. Jaap, D. Palandro, K. Ciembronowicz
North American Commission on stratigraphic nomenclature North American Commission on stratigraphic nomenclature
No abstract available.
Authors
R. M. Easton, J.O. Jones, A.C. Lenz, Ismael Ferrusquia-Villafranca, E. A. Mancini, Bruce R. Wardlaw, Lucy E. Edwards, B.R. Pratt
Seismic architecture and lithofacies of turbidites in Lake Mead (Arizona and Nevada, U.S.A.), an analogue for topographically complex basins Seismic architecture and lithofacies of turbidites in Lake Mead (Arizona and Nevada, U.S.A.), an analogue for topographically complex basins
Turbidites, which have accumulated in Lake Mead since completion of the Hoover Dam in 1935, have been mapped using high-resolution seismic and coring techniques. This lake is an exceptional natural laboratory for studying fine-grained turbidite systems in complex topographic settings. The lake comprises four relatively broad basins separated by narrow canyons, and turbidity currents run...
Authors
D.C. Twichell, V.A. Cross, A.D. Hanson, B.J. Buck, J.G. Zybala, M.J. Rudin
Implications of ground water chemistry and flow patterns for earthquake studies Implications of ground water chemistry and flow patterns for earthquake studies
Ground water can facilitate earthquake development and respond physically and chemically to tectonism. Thus, an understanding of ground water circulation in seismically active regions is important for earthquake prediction. To investigate the roles of ground water in the development and prediction of earthquakes, geological and hydrogeological monitoring was conducted in a seismogenic...
Authors
W. Guangcai, Z. Zuochen, W. Min, C.A. Cravotta, L. Chenglong
Surficial geology of the sea floor in west-central Long Island Sound as shown by sidescan-sonar imagery Surficial geology of the sea floor in west-central Long Island Sound as shown by sidescan-sonar imagery
We used sidescan-sonar imagery detailing almost 300 km2 of the sea floor in west-central Long Island Sound in conjunction with bathymetry, sediment samples, bottom video, and seismic data to interpret the area's surficial geology. The distribution of sediments and sedimentary environments interpreted from these data sets represents the Quaternary geology, regional bathymetry, and effects...
Authors
K.Y. McMullen, L.J. Poppe, M. L. DiGiacomo-Cohen, M. S. Moser, E. B. Christman