Seismic hazard in Karachi, Pakistan: Uncertain past, uncertain future
R. Bilham, S. Lodi, S. Hough, S. Bukhary, A.M. Khan, S.F.A. Rafeeqi
2007, Seismological Research Letters (78) 601-613
[No abstract available]...
Clinical biochemistry in healthy manatees (Trichechus manatus latirostris)
J. W. Harvey, K.E. Harr, D. Murphy, M.T. Walsh, E.J. Chittick, R. K. Bonde, M.G. Pate, C. J. Deutsch, H.H. Edwards, E.M. Haubold
2007, Journal of Zoo and Wildlife Medicine (38) 269-279
Florida manatees (Trichechus manatus latirostris) are endangered aquatic mammals living in coastal and riverine waterways of Florida and adjacent states. Serum or plasma biochemical analyses are important tools in evaluating the health of free-ranging and captive manatees. The purpose of this study was to measure diagnostically important analytes in the...
Ecological observations on the colonial ascidian Didemnum sp. in a New England tide pool habitat
P. C. Valentine, M.R. Carman, D.S. Blackwood, E.J. Heffron
2007, Journal of Experimental Marine Biology and Ecology (342) 109-121
The colonial ascidian Didemnum sp. has colonized northwestern Atlantic coastal habitats from southern Long Island, New York, to Eastport, Maine. It is also present in offshore habitats of the Georges Bank fishing grounds. It threatens to alter fisheries habitats and shellfish aquacultures. Observations in a tide pool at Sandwich, MA from...
The lakes and seas of Titan
Rosaly Lopes, Karl L. Mitchell, Stephen D. Wall, Giuseppe Mitri, Michael Janssen, Steven J. Ostro, Randolph L. Kirk, Alexander G. Hayes, Ellen R. Stofan, Jonathan I. Lunine, Ralph D. Lorenz, Charles Wood, Jani Radebaugh, Philipe Paillou, H. Zebker, Flora Paganelli
2007, Eos, Transactions, American Geophysical Union (88)
No abstract available....
Numerical modelling to determine freshwater/saltwater interface configuration in a low-gradient coastal wetland aquifer
E. Swain, M. Wolfert
2007, Conference Paper, IAHS-AISH Publication
A coupled hydrodynamic surface-water/groundwater model with salinity transport is used to examine the aquifer salinity interface in the coastal wetlands of Everglades National Park in Florida, USA. The hydrology differs from many other coastal areas in that inland water levels are often higher than land surface, the flow gradients are...
Hydrogeologic controls imposed by mechanical stratigraphy in layered rocks of the Chateauguay River Basin, a U.S.-Canada transborder aquifer
Roger H. Morin, Rejean Godin, Miroslav Nastev, Alain Rouleau
2007, Journal of Geophysical Research B: Solid Earth (112)
[1] The Châteauguay River Basin delineates a transborder watershed with roughly half of its surface area located in northern New York State and half in southern Québec Province, Canada. As part of a multidisciplinary study designed to characterize the hydrogeologic properties of this basin, geophysical logs were obtained in 12...
Vegetation classification, mapping, and monitoring at Voyageurs National Park, Minnesota: An application of the U.S. National Vegetation Classification
D. Faber-Langendoen, N. Aaseng, K. Hop, M. Lew-Smith, J. Drake
2007, Applied Vegetation Science (10) 361-374
Question: How can the U.S. National Vegetation Classification (USNVC) serve as an effective tool for classifying and mapping vegetation, and inform assessments and monitoring? Location: Voyageurs National Park, northern Minnesota, U.S.A and environs. The park contains 54 243 ha of terrestrial habitat in the sub-boreal region of North America. Methods:...
Willow Flycatcher nonbreeding territory defense behavior in Costa Rica
M. K. Sogge, T. J. Koronkiewicz, Charles van Riper III, S.L. Durst
2007, The Condor (109) 475-480
We studied the intraspecific territorial defense behavior of wintering Willow Flycatchers (Empidonax traillii) in Costa Rica using a randomized playback experiment that exposed male and female birds to recordings of Willow Flycatcher songs and calls, Lesser Ground Cuckoo (Morococcyx erythropygius) vocalizations, and random noise. Flycatchers of both sexes responded most...
Oceanography of Glacier Bay, Alaska: Implications for biological patterns in a glacial fjord estuary
L.L. Etherington, P.N. Hooge, Elizabeth Ross Hooge, D.F. Hill
2007, Estuaries and Coasts (30) 927-944
Alaska, U.S.A, is one of the few remaining locations in the world that has fjords that contain temperate idewater glaciers. Studying such estuarine systems provides vital information on how deglaciation affects oceanographic onditions of fjords and surrounding coastal waters. The oceanographic system of Glacier Bay, Alaska, is of particular interest...
Coastal communities
J.M. Baldizar, N. B. Rybicki
2007, Ecological Restoration (25) 138-139
[No abstract available]...
Seasonal movements and environmental conditions experienced by Pacific halibut in the Bering Sea, examined by pop-up satellite tags
Andrew C. Seitz, Timothy Loher, Jennifer L. Nielsen
2007, Scientific Report of the International Pacific Halibut Commission 84
Currently, Pacific halibut are managed as one population extending from California to the Bering Sea. However, we hypothesize that a spawning subpopulation of Pacific halibut exists in the Bering Sea. In this study, we examined the seasonal migration and depth-specific behavior of Pacific halibut in the Bering Sea, which serve...
Generalization of von Neumann analysis for a model of two discrete half-spaces: The acoustic case
M.M. Haney
2007, Geophysics (72)
Evaluating the performance of finite-difference algorithms typically uses a technique known as von Neumann analysis. For a given algorithm, application of the technique yields both a dispersion relation valid for the discrete time-space grid and a mathematical condition for stability. In practice, a major shortcoming of conventional von Neumann analysis...
Recent nesting of the American Crocodile (Crocodylus acutus) in Everglades National Park, Florida, USA
F.J. Mazzotti, M.S. Cherkiss, M.W. Parry, K.G. Rice
2007, Herpetological Review (38) 285-289
[No abstract available]...
The age and provenance of 'Eschrichtius' cephalus cope (Mammalia: Cetacea)
Robert E. Weems, Lucy E. Edwards
2007, Journal of Vertebrate Paleontology (27) 752-756
No abstract available....
Amphibians and disease: Implications for conservation in the Greater Yellowstone Ecosystem
Paul Stephen Corn
2007, Yellowstone Science (15) 11-16
The decline of amphibian populations is a world-wide phenomenon that has received increasing attention since about 1990. In 2004, the World Conservation Union’s global amphibian assessment concluded that 48% of the world’s 5,743 described amphibian species were in decline, with 32% considered threatened (Stuart et al. 2004). Amphibian declines are...
Responses of pond-breeding amphibians to wildfire: Short-term patterns in occupancy and colonization
B. R. Hossack, P.S. Corn
2007, Ecological Applications (17) 1403-1410
Wildland fires are expected to become more frequent and severe in many ecosystems, potentially posing a threat to many sensitive species. We evaluated the effects of a large, stand-replacement wildfire on three species of pond-breeding amphibians by estimating changes in occupancy of breeding sites during the three years before and...
Early discrimination of Atlantic salmon smolt age: Time course of the relative effectiveness of body size and shape
J.H. Pearlstein, B.H. Letcher, M. Obedzinski
2007, Transactions of the American Fisheries Society (136) 1622-1632
The goal of this study was to test the relative effectiveness of morphological measurements and body size in predicting the smolt age of Atlantic salmon Salmo salar and to determine the time course of body size and shape differences between smolt ages. Analyses were conducted on age-0 to age-2 fish...
Genotyping of Korean isolates of infectious hematopoietic necrosis virus (IHNV) based on the glycoprotein gene
W.-S. Kim, M.-J. Oh, T. Nishizawa, J. W. Park, Gael Kurath, M. Yoshimizu
2007, Archives of Virology (152) 2119-2124
Glycoprotein (G) gene nucleotide sequences of four Korean isolates of infectious hematopoietic necrosis virus (IHNV) were analyzed to evaluate their genetic relatedness to worldwide isolates. All Korean isolates were closely related to Japanese isolates of genogroup JRt rather than to those of North American and European genogroups. It is believed...
Multi-frequency ground-penetrating radar method for revealing complex sedimentary facies
A.J. Delaney, J. Horsman, M.L. Prentice, S.A. Arcone
2007, Conference Paper, Proceedings of the 2007 4th International Workshop on Advanced Ground Penetrating Radar, IWAGPR 2007
We attempted to resolve deltaic facies in Taylor Valley, Antarctica by using pulses centered near 120, 300 and 880 MHz, the latter of which has not yet been tried in this setting, The 120 MHz profiles clearly defined gross material changes, while the 300 MHz profiles added significant resolution to...
Mammoth (Mammuthus sp.) excavation on a college campus in Western Illinois, USA
J.D. Treworgy, J.J. Saunders, D.A. Grimley
2007, Quaternary International (169-170) 24-28
The discovery of the remains of a mammoth, Mammuthus sp., on the Principia College campus in Elsah, Illinois, has allowed for careful excavation by students over several years. The mammoth is relatively well preserved in late Wisconsin Peoria Silt on the top of the bluffs of the Mississippi River. The...
ASAR images a diverse set of deformation patterns at Kilauea volcano, Hawai'i
Michael P. Poland
2007, Conference Paper
Since 2003, 27 independent look angles have been acquired by ENVISAT’s Advanced Synthetic Aperture Radar (ASAR) instrument over the island of Hawai`i, allowing for the formation of thousands of interferograms showing deformation of the ground surface. On Kīlauea volcano, a transition from minor to broad-scale summit inflation was observed by...
Sources and temporal dynamics of arsenic in a New Jersey watershed, USA
J. L. Barringer, J.L. Bonin, M.J. DeLuca, T. Romagna, K. Cenno, M. Alebus, T. Kratzer, B. Hirst
2007, Science of the Total Environment (379) 56-74
We examined potential sources and the temporal dynamics of arsenic (As) in the slightly alkaline waters of the Wallkill River, northwestern New Jersey, where violations of water-quality standards have occurred. The study design included synoptic sampling of stream water and bed sediments in...
Research on the impacts of past and future hurricanes on the endangered Florida manatee
Catherine A. Langtimm, M. Dennis Krohn, Bradley Stith, James P. Reid, C.A. Beck, Susan M. Butler
2007, Circular 1306-6J
U.S. Geological Survey (USGS) research on Florida manatees (Trichechus manatus latirostris) from 1982 through 1998 identified lower apparent survival rates for adult manatees during years when Hurricane Elena (1985), the March "Storm of the Century"(1993), and Hurricane Opal (1995) hit the northern coast of the Gulf of Mexico. Although our...
Topography-based analysis of Hurricane Katrina inundation of New Orleans
Dean Gesch
2007, Circular 1306-3G
The ready availability of high-resolution, high-accuracy elevation data proved valuable for development of topographybased products to determine rough estimates of the inundation of New Orleans, La., from Hurricane Katrina. Because of its high level of spatial detail and vertical accuracy of elevation measurements, light detection and ranging (lidar) remote sensing...
GIS for the Gulf: A reference database for hurricane-affected areas
Dave Greenlee
2007, Circular 1306-4C
A week after Hurricane Katrina made landfall in Louisiana, a collaboration among multiple organizations began building a database called the Geographic Information System for the Gulf, shortened to "GIS for the Gulf," to support the geospatial data needs of people in the hurricane-affected area. Data were gathered from diverse sources...
