Publications
These publications showcase the significant science conducted in our Science Centers.
Filter Total Items: 16785
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 deposits are indi
Authors
H. F. Ryan, H. J. Lee, Peter J. Haeussler, C. R. Alexander, Robert E. Kayen
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, was used
Authors
Mark Wayland, David J. Hoffman, Mark L. Mallory, Ray T. Alisauskas, Katherine R. Stebbins
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, water dive
Authors
Theodore R. Castro-Santos, Alexander Haro
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 many concho
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
No abstract available.
Authors
Greg Linder, B. Palmer, Edward E. Little, Christopher L. Rowe, Paula F. P. Henry
Common clay and shale: a look at 2009 activity
An overview of clay and shale production, consumption, and prices in 2009 is presented. The industry has seen 15 to 20 percent declines during the past two years, yet producers still expect sales to decline in 2010.
Authors
R.L. Virta
Standards for documenting and monitoring bird reintroduction projects
It would be much easier to assess the effectiveness of different reintroduction methods, and so improve the success of reintroductions, if there was greater standardization in documentation of the methods and outcomes. We suggest a series of standards for documenting and monitoring the methods and outcomes associated with reintroduction projects for birds. Key suggestions are: documenting the plan
Authors
W.J. Sutherland, D. Armstrong, S.H.M. Butchart, J.M. Earnhardt, J. Ewen, I. Jamieson, C.G. Jones, R. Lee, P. Newbery, J. D. Nichols, K.A. Parker, F. Sarrazin, P.J. Seddon, N. Shah, V. Tatayah
The Sudbury impact layer in the paleoproterozoiciron ranges of northern Michigan, USA
A layer of breccia that contains fragments of impact ejecta has been found at 10 sites in the Paleoproterozoic iron ranges of northern Michigan, in the Lake Superior region of the United States. Radiometric age constraints from events predating and postdating deposition of the breccia are ca. 1875 Ma and 1830 Ma. The major bolide impact that occurred at 1850 Ma at Sudbury, Ontario, 500–700 km east
Authors
W. F. Cannon, K. J. Schulz, J. Wright Horton, David A. King
The three scales of submarine groundwater flow and discharge across passive continental margins
Increased study of submarine groundwater systems in recent years has provided a wealth of new data and techniques, but some ambiguity has been introduced by insufficient distinguishing of the relevant spatial scales of the phenomena studied. Submarine groundwater flow and discharge on passive continental margins can be most productively studied and discussed by distinct consideration of the follow
Authors
John F. Bratton
Extension in Mona Passage, Northeast Caribbean
As shown by the recent Mw 7.0 Haiti earthquake, intra-arc deformation, which accompanies the subduction process, can present seismic and tsunami hazards to nearby islands. Spatially-limited diffuse tectonic deformation within the Northeast Caribbean Plate Boundary Zone likely led to the development of the submerged Mona Passage between Puerto Rico and the Dominican Republic. GPS geodetic data and
Authors
J.D. Chaytor, Uri S. ten Brink
Mineralogy and the release of trace elements from slag from the Hegeler Zinc smelter, Illinois (USA)
Slag from the former Hegeler Zn-smelting facility in Illinois (USA) is mainly composed of spinifex Ca-rich plagioclase, fine-grained dendritic or coarse-grained subhedral to anhedral clinopyroxenes, euhedral to subhedral spinels, spherical blebs of Fe sulfides, silicate glass, and less commonly fayalitic olivine. Mullite and quartz were also identified in one sample as representing remnants of the
Authors
Nadine M. Piatak, Robert R. Seal
Effectiveness of Wildlife Underpasses and Fencing to Reduce Wildlife–Vehicle Collisions
Transportation planners are increasingly incorporating roadway design features to mitigate impacts of highways on wildlife and to increase driver safety. We used camera and track surveys to evaluate wildlife use before and after construction of 3 wildlife underpasses and associated fencing on a new section of United States Highway 64 in Washington County, North Carolina, USA. We recorded 242 occas
Authors
Matthew F. McCollister