Publications
These publications showcase the significant science conducted in our Science Centers.
Filter Total Items: 16733
Extinction rate estimates for plant populations in revisitation studies: Importance of detectability Extinction rate estimates for plant populations in revisitation studies: Importance of detectability
Many researchers have obtained extinction-rate estimates for plant populations by comparing historical and current records of occurrence. A population that is no longer found is assumed to have gone extinct. Extinction can then be related to characteristics of these populations, such as habitat type, size, or species, to test ideas about what factors may affect extinction. Such studies...
Authors
M. Kery
Gold concentrations in abiotic materials, plants, and animals: A synoptic review Gold concentrations in abiotic materials, plants, and animals: A synoptic review
Gold (Au) is ubiquitous in the environment and mined commercially at numerous locations worldwide. It is also an allergen that induces dermatitis in sensitive individuals. Gold concentrations were comparatively elevated in samples collected near gold mining and processing facilities, although no data were found for birds and non-human mammals. Maximum gold concentrations reported in...
Authors
R. Eisler
Mute swans and their Chesapeake Bay habitats: proceedings of a symposium Mute swans and their Chesapeake Bay habitats: proceedings of a symposium
The symposium 'Mute Swans and their Chesapeake Bay Habitats,' held on June 7, 2001, provided a forum for biologists and managers to share research findings and management ideas concerning the exotic and invasive mute swan (Cygnus olar). This species has been increasing in population size and is considered by many to be a problem in regard to natural food resources in the Bay that are...
Evaluation of borehole geophysical logs at the Sharon Steel Farrell Works Superfund site, Mercer County, Pennsylvania Evaluation of borehole geophysical logs at the Sharon Steel Farrell Works Superfund site, Mercer County, Pennsylvania
On April 14?15, 2003, geophysical logging was conducted in five open-borehole wells in and adjacent to the Sharon Steel Farrell Works Superfund Site, Mercer County, Pa. Geophysical-logging tools used included caliper, natural gamma, single-point resistance, fluid temperature, and heatpulse flowmeter. The logs were used to determine casing depth, locate subsurface fractures, identify...
Authors
Steven D. McAuley
VEMAP Phase 2 bioclimatic database. I. Gridded historical (20th century) climate for modeling ecosystem dynamics across the conterminous USA VEMAP Phase 2 bioclimatic database. I. Gridded historical (20th century) climate for modeling ecosystem dynamics across the conterminous USA
Analysis and simulation of biospheric responses to historical forcing require surface climate data that capture those aspects of climate that control ecological processes, including key spatial gradients and modes of temporal variability. We developed a multivariate, gridded historical climate dataset for the conterminous USA as a common input database for the Vegetation/Ecosystem...
Authors
T.G.F. Kittel, N.A. Rosenbloom, J. Andrew Royle, Christopher Daly, W.P. Gibson, H.H. Fisher, P. Thornton, D.N. Yates, S. Aulenbach, C. Kaufman, R. McKeown, D. Bachelet, D. S. Schimel, R. Neilson, J. Lenihan, R. Drapek, D.S. Ojima, W.J. Parton, J. M. Melillo, D. W. Kicklighter, H. Tian, A. D. McGuire, M.T. Sykes, B. Smith, S. Cowling, T. Hickler, I. C. Prentice, S. Running, K.A. Hibbard, W.M. Post, A.W. King, T. Smith, B. Rizzo, F.I. Woodward
Spatially quantitative seafloor habitat mapping: Example from the northern South Carolina inner continental shelf Spatially quantitative seafloor habitat mapping: Example from the northern South Carolina inner continental shelf
Naturally occurring hard bottom areas provide the geological substrate that can support diverse assemblages of sessile benthic organisms, which in turn, attract many reef-dwelling fish species. Alternatively, defining the location and extent of bottom sand bodies is relevant for potential nourishment projects as well as to ensure that transient sediment does not affect reef habitats...
Authors
G.Y. Ojeda, P. T. Gayes, R. F. Van Dolah, W. C. Schwab
Floodtide pulses after low tides in shallow subembayments adjacent to deep channels Floodtide pulses after low tides in shallow subembayments adjacent to deep channels
In shallow waters surface gravity waves (tides) propagate with a speed proportional to the square root of water depth (c=g(h+η)). As the ratio of free surface displacement to mean depth (η/h) approaches unity the wave will travel noticeably faster at high tide than at low tide, creating asymmetries in the tidal form. This physical process is explained analytically by the increased...
Authors
J.C. Warner, D. H. Schoellhamer, C.A. Ruhl, J.R. Burau
Accuracy of a pulse-coherent acoustic Doppler profiler in a wave-dominated flow Accuracy of a pulse-coherent acoustic Doppler profiler in a wave-dominated flow
The accuracy of velocities measured by a pulse-coherent acoustic Doppler profiler (PCADP) in the bottom boundary layer of a wave-dominated inner-shelf environment is evaluated. The downward-looking PCADP measured velocities in eight 10-cm cells at 1 Hz. Velocities measured by the PCADP are compared to those measured by an acoustic Doppler velocimeter for wave orbital velocities up to 95...
Authors
J.R. Lacy, C. R. Sherwood
Organochlorine pesticides and thiamine in eggs of largemouth bass and American alligators and their relationship with early life-stage mortality Organochlorine pesticides and thiamine in eggs of largemouth bass and American alligators and their relationship with early life-stage mortality
Thiamine deficiency has been linked to early mortality syndrome in salmonids in the Great Lakes. This study was conducted to compare thiamine concentrations in American alligators (Alligator mississippiensis) and Florida largemouth bass (Micropterus salmoides floridanus) eggs from sites with high embryo mortality and high exposure to organochlorine pesticides (OCPs) (Lakes Apopka and...
Authors
M. S. Sepulveda, J.J. Wiebe, D. C. Honeyfield, H.R. Rauschenberger, J. P. Hinterkopf, W.E. Johnson, T. S. Gross
Influence of northwest Pacific productivity on North Pacific Intermediate Water oxygen concentrations during the Bølling-Ållerød interval (14.7-12.9 ka) Influence of northwest Pacific productivity on North Pacific Intermediate Water oxygen concentrations during the Bølling-Ållerød interval (14.7-12.9 ka)
Elevated productivity in the northwest Pacific is suggested as a new possible control driving past intervals of low-O2 intermediate water along the western continental margin of North America. According to this mechanism, O2 consumption would occur near the site of formation of North Pacific Intermediate Water (NPIW), due to increased respiration of organic carbon in response to a high
Authors
John Crusius, Thomas F. Pedersen, Stephanie Kienast, Lloyd D. Keigwin, Laurent Labeyrie
Stress interaction between subduction earthquakes and forearc strike-slip faults: Modeling and application to the northern Caribbean plate boundary Stress interaction between subduction earthquakes and forearc strike-slip faults: Modeling and application to the northern Caribbean plate boundary
Strike-slip faults in the forearc region of a subduction zone often present significant seismic hazard because of their proximity to population centers. We explore the interaction between thrust events on the subduction interface and strike-slip faults within the forearc region using three-dimensional models of static Coulomb stress change. Model results reveal that subduction...
Authors
Uri S. ten Brink, J. Lin
Isolation and characterization of mycobacteria from striped bass Morone saxatilis from the Chesapeake Bay Isolation and characterization of mycobacteria from striped bass Morone saxatilis from the Chesapeake Bay
Mycobacteriosis in striped bass Morone saxatilis of Chesapeake Bay, USA, was first diagnosed in 1997 based on the presence of granulomatous inflammation and acid-fast bacteria in skin and spleen. To confirm histopathology, bacteriological detection and identification of mycobacteria were begun using splenic tissue from fish with and without skin ulcerations. On the basis of initial...
Authors
M. W. Rhodes, H. Kator, I. Kaattari, D. Gauthier, W. Vogelbein, C. A. Ottinger