Publications
These publications showcase the significant science conducted in our Science Centers.
Filter Total Items: 16727
Modeling migratory energetics of Connecticut River American shad (Alosa sapidissima): implications for the conservation of an iteroparous anadromous fish Modeling migratory energetics of Connecticut River American shad (Alosa sapidissima): implications for the conservation of an iteroparous anadromous fish
We present a simulation model in which individual adult migrant American shad (Alosa sapidissima) ascend the Connecticut River and spawn, and survivors return to the marine environment. Our approach synthesizes bioenergetics, reproductive biology, and behavior to estimate the effects of migratory distance and delays incurred at dams on spawning success and survival. We quantified both...
Authors
Theodore Castro-Santos, Benjamin H. Letcher
Methods for development of planning-level estimates of stormflow at unmonitored stream sites in the conterminous United States Methods for development of planning-level estimates of stormflow at unmonitored stream sites in the conterminous United States
This report documents methods for data compilation and analysis of statistics for stormflows that meet data-quality objectives for order-of-magnitude planning-level water-quality estimates at unmonitored sites in the conterminous United States. Statistics for prestorm streamflow, precipitation, and runoff coefficients are used to model stormflows for use with the Stochastic Empirical...
Authors
Gregory E. Granato
The impact of hydrate saturation on the mechanical, electrical, and thermal properties of hydrate-bearing sand, silts, and clay The impact of hydrate saturation on the mechanical, electrical, and thermal properties of hydrate-bearing sand, silts, and clay
Proper understanding of the physical properties of hydrate-bearing sediments is required for interpretation of borehole logs and exploration geophysical data, the analysis of borehole and submarine slope stability, and the formulation of reservoir simulation and production models. Yet current knowledge of geophysical and geotechnical properties of hydrate-bearing sediments is still...
Authors
J. Carlos Santamarina, Carolyn D. Ruppel
Historic and paleo-submarine landslide deposits imaged beneath Port Valdez, Alaska: Implications for tsunami generation in a glacial fiord Historic and paleo-submarine landslide deposits imaged beneath Port Valdez, Alaska: Implications for tsunami generation in a glacial fiord
During the 1964 M9.2 great Alaskan earthquake, submarine-slope failures resulted in the generation of highly destructive tsunamis at Port Valdez, Alaska. A high-resolution, mini-sparker reflection profiler was used to image debris lobes, which we attribute to slope failures that occurred both during and prior to the 1964 megathrust event. In these reflection profiles, debris lobe...
Authors
H. F. Ryan, H. J. Lee, Peter J. Haeussler, C. R. Alexander, Robert E. Kayen
Relative gas volume ratios for free gas and gas hydrate accumulations Relative gas volume ratios for free gas and gas hydrate accumulations
No abstract available.
Authors
Ray Boswell, Timothy S Collett, Brian Anderson, Carolyn Ruppel
Evidence of weak contaminant-related oxidative stress in glaucous gulls (Larus hyperboreus) from the Canadian arctic Evidence of weak contaminant-related oxidative stress in glaucous gulls (Larus hyperboreus) from the Canadian arctic
Environmental contaminants are transported over great distances to Arctic ecosystems, where they can accumulate in wildlife. Whether contaminant concentrations in wildlife are sufficient to produce adverse effects remains poorly understood. Exposure to contaminants elevates oxidative stress with possible fitness consequences. The glaucous gull (Larus hyperboreus), an Arctic top predator...
Authors
Mark Wayland, David J. Hoffman, Mark L. Mallory, Ray T. Alisauskas, Katherine R. Stebbins
Fish guidance and passage at barriers Fish guidance and passage at barriers
Habitat fragmentation resulting from human activities is a major factor contributing to reductions in biodiversity and species abundance worldwide. When movements are restricted, subpopulations become isolated, leading to reduced breeding opportunities, inbreeding depression, and interruption of key life stages. This problem is particularly ubiquitous in riverine ecosystems, where dams...
Authors
Theodore R. Castro-Santos, Alexander Haro
The biostratigraphic importance of conchostracans in the continental Triassic of the northern hemisphere The biostratigraphic importance of conchostracans in the continental Triassic of the northern hemisphere
Conchostracans or clam shrimp (order Conchostraca Sars) are arthropods with a carapace consisting of two chitinous lateral valves. Triassic conchostracans range in size from 2 to 12.5 mm long and are common in deposits that formed in fresh water lakes, isolated ponds and brackish areas. Their dessication- and freeze-resistant eggs can be dispersed by wind over long distances. Therefore...
Authors
H. W. Kozur, Robert E. Weems
Physiological ecology of amphibians and reptiles: Natural history and life history attributes framing chemical exposure in the field Physiological ecology of amphibians and reptiles: Natural history and life history attributes framing chemical exposure in the field
No abstract available.
Authors
Greg Linder, B. Palmer, Edward E. Little, Christopher L. Rowe, Paula F. P. Henry
Coastal vulnerability assessment of the Northern Gulf of Mexico to sea-level rise and coastal change Coastal vulnerability assessment of the Northern Gulf of Mexico to sea-level rise and coastal change
A coastal vulnerability index (CVI) was used to map the relative vulnerability of the coast to future sea-level rise along the Northern Gulf of Mexico from Galveston, TX, to Panama City, FL. The CVI ranks the following in terms of their physical contribution to sea-level rise-related coastal change: geomorphology, regional coastal slope, rate of relative sea-level rise, historical...
Authors
E.A. Pendleton, J.A. Barras, S.J. Williams, D.C. Twichell
On the road again for a bird survey that counts On the road again for a bird survey that counts
No abstract available.
Authors
Dave Ziolkowski, Keith Pardieck, John R. Sauer
Petrography, mineralogy, and geochemistry of deep gravelly sands in the Eyreville B core, Chesapeake Bay impact structure Petrography, mineralogy, and geochemistry of deep gravelly sands in the Eyreville B core, Chesapeake Bay impact structure
The ICDP–USGS Eyreville drill cores in the Chesapeake Bay impact structure reached a total depth of 1766 m and comprise (from the bottom upwards) basement-derived schists and granites/pegmatites, impact breccias, mostly poorly lithified gravelly sand and crystalline blocks, a granitic slab, sedimentary breccias, and postimpact sediments. The gravelly sand and crystalline block section...
Authors
Katerina Bartosova, Susanne Gier, J. Wright Horton, Christian Koeberl, Dieter Mader, Henning Dypvik