Ordovician "sphinctozoan" sponges from Prince of Wales Island, southeastern Alaska
J.K. Rigby, Susan M. Karl, R. B. Blodgett, J.F. Baichtal
2005, Journal of Paleontology (79) 862-870
A faunule of silicified hypercalcified "sphinctozoan" sponges has been recovered from a clast of Upper Ordovician limestone out of the Early Devonian Karheen Formation on Prince of Wales Island in southeastern Alaska. Included in the faunule are abundant examples of the new genus Girtyocoeliana, represented by Girtyocoeliana epiporata (Rigby and...
Breeding ecology of Spectacled Eiders Somateria fischeri in Northern Alaska
J. Bart, S.L. Earnst
2005, Wildfowl (55) 83-98
Spectacled Eiders Somateria fischeri were studied on the Colville River delta during 1994-1999, prior to oil field development, to document aspects of breeding biology that are poorly known, especially for northern-nesting populations. Both sexes arrived June 6-12; many males remained for only about 10 days. Density on the 178-km2 study...
Comparison of Bacteroides-Prevotella 16S rRNA genetic markers for fecal samples from different animal species
L.R. Fogarty, M.A. Voytek
2005, Applied and Environmental Microbiology (71) 5999-6007
To effectively manage surface and ground waters it is necessary to improve our ability to detect and identify sources of fecal contamination. We evaluated the use of the anaerobic bacterial group Bacteroides-Prevotella as a potential fecal indicator. Terminal restriction length polymorphism (T-RFLP) of the 16S rRNA genes from this group...
Can superior natural amenities create high-quality employment opportunities? The case of nonconsumptive river recreation in central Idaho
J.R. McKean, D.M. Johnson, Richard L. Johnson, R.G. Taylor
2005, Society and Natural Resources (18) 749-758
Central Idaho has superior environmental amenities, as evidenced by exceptionally high-value tourism, such as guided whitewater rafting. The focus of our study concerns the attainment of high-quality jobs in a high-quality natural environment. We estimate cumulative wage rate effects unique to nonconsumptive river recreation in central Idaho for comparison with...
Exploring individual quality: Basal metabolic rate and reproductive performance in storm-petrels
A.L. Blackmer, R.A. Mauck, Joshua T. Ackerman, C.E. Huntington, G.A. Nevitt, J. B. Williams
2005, Behavioral Ecology (16) 906-913
Despite evidence that some individuals achieve both superior reproductive performance and high survivorship, the factors underlying variation in individual quality are not well understood. The compensation and increased-intake hypotheses predict that basal metabolic rate (BMR) influences reproductive performance; if so, variation in BMR may be related to differences in individual...
Petroleum geochemistry of oil and gas from Barbados: Implications for distribution of Cretaceous source rocks and regional petroleum prospectivity
R.J. Hill, Christopher J. Schenk
2005, Marine and Petroleum Geology (22) 917-943
Petroleum produced from the Barbados accretionary prism (at Woodbourne Field on Barbados) is interpreted as generated from Cretaceous marine shale deposited under normal salinity and dysoxic conditions rather than from a Tertiary source rock as previously proposed. Barbados oils correlate with some oils from eastern Venezuela and Trinidad that are...
Performance of juvenile steelhead trout (Oncorhynchus mykiss) produced from untreated and cryopreserved milt
Michael C. Hayes, Stephen P. Rubin, Jay E. Hensleigh, Reginald R. Reisenbichler, Lisa A. Wetzel
2005, Aquaculture (249) 291-302
Despite the expanding use of milt cryopreservation in aquaculture, the performance of fish produced from this technique has not been fully explored beyond initial rearing stages. We compared the performance of juvenile steelhead Oncorhynchus mykiss produced from untreated (UM) and cryopreserved milt (CM) and reared for 4–9 months. For the...
The South China sea margins: Implications for rifting contrasts
D.E. Hayes, S.S. Nissen
2005, Earth and Planetary Science Letters (237) 601-616
Implications regarding spatially complex continental rifting, crustal extension, and the subsequent evolution to seafloor spreading are re-examined for the northern and southern-rifted margins of the South China Sea. Previous seismic studies have shown dramatic differences in the present-day crustal thicknesses as the manifestations of the strain experienced during the rifting...
Prevalence of agglutinating antibodies to Toxoplasma gondii and Sarcocystis neurona in beavers (Castor canadensis) from Massachusetts
C.N. Jordan, T. Kaur, K. Koenen, S. DeStefano, A.M. Zajac, D. S. Lindsay
2005, Journal of Parasitology (91) 1228-1229
The present study examined the seroprevalence of Toxoplasma gondii and Sarcocystls neurona in a population of beavers (Castor canadensis) from Massachusetts. Sixty-two blood samples were collected during the field seasons over 3 consecutive years from different animals. Blood was collected onto filter paper and shipped to the Department of Biomedical...
THEMIS VIS and IR observations of a high-altitude Martian dust devil
Glen Cushing, Timothy N. Titus, Phillip R. Christensen
2005, Geophysical Research Letters (32) 1-3
The Mars Odyssey Thermal Emission Imaging System (THEMIS) imaged a Martian dust devil in both visible and thermal-infrared wavelengths on January 30, 2004. We believe this is the first documented infrared observation of an extraterrestrial dust devil, and the highest to be directly observed at more than 16 kilometers above...
Chronic toxicity of un-ionized ammonia to early life-stages of endangered Colorado pikeminnow (Ptychocheilus lucius) and razorback sucker (Xyrauchen texanus) compared to the surrogate fathead minnow (Pimephales promelas)
J.F. Fairchild, A.L. Allert, L.C. Sappington, B. Waddell
2005, Archives of Environmental Contamination and Toxicology (49) 378-384
Ammonia-contaminated groundwater enters the Upper Colorado River from beneath the abandoned Moab Uranium Mill Tailings Pile near Moab, Utah. This reach of the Upper Colorado River was designated as critical habitat for four endangered fish species because it is one of the few existing areas with known spawning and rearing...
Detrital zircon provenance evidence for large-scale extrusion along the Altyn Tagh fault
Y. Yue, S.A. Graham, B.D. Ritts, J. L. Wooden
2005, Tectonophysics (406) 165-178
The question of whether or not the Altyn Tagh fault is a large-scale extrusion boundary is critical for understanding the role of lateral extrusion in accommodating the Indo-Asian convergence and in building the Tibetan Plateau. Oligocene conglomerate clasts in the eastern Xorkol basin are low-grade slate, phyllite, sandstone, dacite and...
Predecessors of the giant 1960 Chile earthquake
M. Cisternas, B.F. Atwater, F. Torrejon, Y. Sawai, G. Machuca, M. Lagos, A. Eipert, C. Youlton, I. Salgado, T. Kamataki, M. Shishikura, C.P. Rajendran, J.K. Malik, Y. Rizal, M. Husni
2005, Nature (437) 404-407
It is commonly thought that the longer the time since last earthquake, the larger the next earthquake's slip will be. But this logical predictor of earthquake size, unsuccessful for large earthquakes on a strike-slip fault, fails also with the giant 1960 Chile earthquake of magnitude 9.5 (ref. 3). Although the...
Evaluating and understanding fish health risks and their consequences in propagated and free-ranging fish populations
C.M. Moffitt, A.H. Haukenes, C.J. Williams
2005, American Fisheries Society Symposium (2005) 529-537
Fishery managers and resource conservationists are increasingly interested in understanding the fish health and disease risks of free-ranging fishes and whether propagated fishes or features and practices used at fish culture facilities pose a health risk to free-ranging populations. Disease agents are present in most both captive and all free-ranging...
Use of relational databases to evaluate regional petroleum accumulation, groundwater flow, and CO2 sequestration in Kansas
T.R. Carr, D. F. Merriam, J.D. Bartley
2005, American Association of Petroleum Geologists Bulletin (89) 1607-1627
Large-scale relational databases and geographic information system tools are used to integrate temperature, pressure, and water geo-chemistry data from numerous wells to better understand regional-scale geothermal and hydrogeological regimes of the lower Paleozoic aquifer systems in the mid-continent and to evaluate their potential for geologic CO2 sequestration. The lower Paleozoic...
Nitrogen and carbon flow from rock to water: Regulation through soil biogeochemical processes, Mokelumne River watershed, California, and Grand Valley, Colorado
J.M. Holloway, R. L. Smith
2005, Journal of Geophysical Research F: Earth Surface (110)
Soil denitrification is an ecologically important nitrogen removal mechanism that releases to the atmosphere the greenhouse gas N2O, an intermediate product from the reduction of NO3- to N 2. In this study we evaluate the relationship between soil carbon and denitrification potential in watersheds with bedrock acting as a nonpoint...
Part 2: A field study of enhanced remediation of Toluene in the vadose zone using a nutrient solution
J.A. Tindall, E.P. Weeks, M. Friedel
2005, Water, Air, & Soil Pollution (168) 359-389
The objective of this study was to test the effectiveness of a nitrate-rich nutrient solution and hydrogen peroxide (H2O2) to enhance in-situ microbial remediation of toluene in the unsaturated zone. Three sand-filled plots were tested in three phases (each phase lasting approximately 2 weeks). During the control phase, toluene...
Temporal and spatial variation in relative abundance and length structure of salmonids in reservoirs: Implications for monitoring
D.T. Rhea, W.A. Hubert, R.S. Gangl, R.A. Whaley
2005, North American Journal of Fisheries Management (25) 1301-1309
Spatial and temporal variations in salmonid catch per unit effort (C/f) may affect monitoring efforts in lakes and reservoirs. This study evaluated the spatial and temporal variation in gill-net C/f and length structure of captured salmonids in nearshore (???7.6-m bottom depth) and offshore (>7.6-m bottom depth) areas of two Wyoming...
Mapping and improving frequency, accuracy, and interpretation of land cover change: Classifying coastal Louisiana with 1990, 1993, 1996, and 1999 Landsat Thematic Mapper image data
G. Nelson, Elijah W. Ramsey III, A. Rangoonwala
2005, Conference Paper, Proceedings of the Third International Workshop on the Analysis of Multi-Temporal Remote Sensing Images 2005
Landsat Thematic Mapper images and collateral data sources were used to classify the land cover of the Mermentau River Basin within the chenier coastal plain and the adjacent uplands of Louisiana, USA. Landcover classes followed that of the National Oceanic and Atmospheric Administration's Coastal Change Analysis Program; however, classification methods...
Genetic diversity, kinship analysis, and broodstock management of captive Atlantic sturgeon for population restoration
A.P. Henderson, A.P. Spidle, T.L. King
2005, American Fisheries Society Symposium (2005) 621-633
Captive Atlantic sturgeon Acipenser oxyrinchus considered for use as broodstock in a restoration program were genotyped using nuclear DNA microsatellites and compared to wild collections from the Hudson River, New York (source of parents of the captive sturgeon) and from Albemarle Sound, North Carolina. Because the potential broodfish were the...
Palaeohydrology of the Southwest Yukon Territory, Canada, based on multiproxy analyses of lake sediment cores from a depth transect
L. Anderson, M.B. Abbott, B. P. Finney, M. E. Edwards
2005, Holocene (15) 1172-1183
Lake-level variations at Marcella Lake, a small, hydrologically closed lake in the southwestern Yukon Territory, document changes in effective moisture since the early Holocene. Former water levels, driven by regional palaeohydrology, were reconstructed by multiproxy analyses of sediment cores from four sites spanning shallow to deep water. Marcella Lake today...
Part 1: Vadose-zone column studies of toluene (enhanced bioremediation) in a shallow unconfined aquifer
J.A. Tindall, M.J. Friedel, R.J. Szmajter, S.M. Cuffin
2005, Water, Air, & Soil Pollution (168) 325-357
The objectives of the laboratory study described in this paper were (1) to determine the effectiveness of four nutrient solutions and a control in stimulating the microbial degradation of toluene in the unsaturated zone as an alternative to bioremediation methodologies such as air sparging, in situ vitrification, or others...
Ocean science: Radiocarbon variability in the western North Atlantic during the last deglaciation
L.F. Robinson, J.F. Adkins, L.D. Keigwin, J. Southon, D. P. Fernandez, S.-L. Wang, D.S. Scheirer
2005, Science (310) 1469-1473
We present a detailed history of glacial to Holocene radiocarbon in the deep western North Atlantic from deep-sea corals and paired benthic-planktonic foraminifera. The deglaciation is marked by switches between radiocarbon-enriched and -depleted waters, leading to large radiocarbon gradients in the water column. These changes played an important role in...
Critical shear stress for erosion of cohesive soils subjected to temperatures typical of wildfires
J. A. Moody, Smith J. Dungan, B.W. Ragan
2005, Journal of Geophysical Research F: Earth Surface (110)
[1] Increased erosion is a well-known response after wildfire. To predict and to model erosion on a landscape scale requires knowledge of the critical shear stress for the initiation of motion of soil particles. As this soil property is temperature-dependent, a quantitative relation between critical shear stress and the temperatures...
Task committee on experimental uncertainty and measurement errors in hydraulic engineering: An update
B. Wahlin, T. Wahl, J. A. Gonzalez-Castro, J. Fulford, M. Robeson
2005, Conference Paper, World Water Congress 2005: Impacts of Global Climate Change - Proceedings of the 2005 World Water and Environmental Resources Congress
As part of their long range goals for disseminating information on measurement techniques, instrumentation, and experimentation in the field of hydraulics, the Technical Committee on Hydraulic Measurements and Experimentation formed the Task Committee on Experimental Uncertainty and Measurement Errors in Hydraulic Engineering in January 2003. The overall mission of this...
