Analysis of Alaskan burn severity patterns using remotely sensed data
P.A. Duffy, J. Epting, J.M. Graham, T.S. Rupp, A. D. McGuire
2007, International Journal of Wildland Fire (16) 277-284
Wildland fire is the dominant large-scale disturbance mechanism in the Alaskan boreal forest, and it strongly influences forest structure and function. In this research, patterns of burn severity in the Alaskan boreal forest are characterised using 24 fires. First, the relationship between burn severity and area burned is quantified using...
River enhancement in the Upper Mississippi River basin: Approaches based on river uses, alterations, and management agencies
T. K. O’Donnell, D.L. Galat
2007, Restoration Ecology (15) 538-549
The Upper Mississippi River is characterized by a series of locks and dams, shallow impoundments, and thousands of river channelization structures that facilitate commercial navigation between Minneapolis, Minnesota, and Cairo, Illinois. Agriculture and urban development over the past 200 years have degraded water quality and increased the rate of sediment...
Bald Mountain gold mining district, Nevada: A Jurassic reduced intrusion-related gold system
C.J. Nutt, A. H. Hofstra
2007, Economic Geology (102) 1129-1155
The Bald Mountain mining district has produced about 2 million ounces (Moz) of An. Geologic mapping, field relationships, geochemical data, petrographic observations, fluid inclusion characteristics, and Pb, S, O, and H isotope data indicate that An mineralization was associated with a reduced Jurassic intrusion. Gold deposits are localized within and...
Costimulatory receptors in jawed vertebrates: Conserved CD28, odd CTLA4 and multiple BTLAs
D. Bernard, J.D. Hansen, Pasquier L. Du, M.-P. Lefranc, A. Benmansour, P. Boudinot
2007, Developmental and Comparative Immunology (31) 255-271
CD28 family of costimulatory receptors is comprised of molecules with a single V-type extracellular Ig domain, a transmembrane and an intracytoplasmic region with signaling motifs. CD28 and cytotoxic T lymphocyte antigen-4 (CTLA4) homologs have been recently identified in rainbow trout. Other sequences similar to mammalian CD28 family members have now...
Sensitivity of high-frequency Rayleigh-wave data revisited
J. Xia, R. D. Miller, J. Ivanov
2007, Conference Paper, SEG Technical Program Expanded Abstracts
Rayleigh-wave phase velocity of a layered earth model is a function of frequency and four groups of earth properties: P-wave velocity, S-wave velocity (Vs), density, and thickness of layers. Analysis of the Jacobian matrix (or the difference method) provides a measure of dispersion curve sensitivity to earth properties. Vs is...
Foraging patterns of Caspian terns and double-crested cormorants in the Columbia River estuary
Donald E. Lyons, D.D. Roby, K. Collis
2007, Northwest Science (81) 91-103
We examined spatial and temporal foraging patterns of Caspian terns and double-crested cormorants nesting in the Columbia River estuary, to potentially identify circumstances where juvenile salmonids listed under the U.S. Endangered Species Act might be more vulnerable to predation by these avian piscivores. Data were collected during the 1998 and...
Earthquake likelihood model testing
D. Schorlemmer, M.C. Gerstenberger, S. Wiemer, D.D. Jackson, D.A. Rhoades
2007, Seismological Research Letters (78) 17-29
INTRODUCTIONThe Regional Earthquake Likelihood Models (RELM) project aims to produce and evaluate alternate models of earthquake potential (probability per unit volume, magnitude, and time) for California. Based on differing assumptions, these models are produced to test the validity of their assumptions and to explore which models should be incorporated...
Influence of tectonic folding on rockfall susceptibility, American Fork Canyon, Utah, USA
J. A. Coe, E. L. Harp
2007, Natural Hazards and Earth System Sciences (7) 1-14
We examine rockfall susceptibility of folded strata in the Sevier fold-thrust belt exposed in American Fork Canyon in north-central Utah. Large-scale geologic mapping, talus production data, rock-mass-quality measurements, and historical rockfall data indicate that rockfall susceptibility is correlated with limb dip and curvature of the folded, cliff-forming Mississippian limestones. On...
Geophysical data integration and conditional uncertainty analysis on hydraulic conductivity estimation
A. Rahman, F.T.-C. Tsai, C.D. White, D.A. Carlson, C. S. Willson
2007, Conference Paper, Examining the Confluence of Environmental and Water Concerns - Proceedings of the World Environmental and Water Resources Congress 2006
Integration of various geophysical data is essential to better understand aquifer heterogeneity. However, data integration is challenging because there are different levels of support between primary and secondary data needed to be correlated in various ways. This study proposes a geostatistical method to integrate the hydraulic conductivity measurements and electrical...
Use of laboratory studies to develop a dispersal model for Missouri River pallid sturgeon early life intervals
B. Kynard, E. Parker, D. Pugh, T. Parker
2007, Journal of Applied Ichthyology (23) 365-374
Understanding the drift dynamics of pallid sturgeon (Scaphirhynchus albus) early life intervals is critical to evaluating damming effects on sturgeons. However, studying dispersal behavior is difficult in rivers. In stream tanks, we studied the effect of velocity on dispersal and holding ability, estimated swimming height, and used the data to...
The case for infrasound as the long-range map cue in avian navigation
J.T. Hagstrum
2007, Conference Paper, Proceedings of the Annual Meeting - Institute of Navigation
Of the various 'map' and 'compass' components of Kramer's avian navigational model, the long-range map component is the least well understood. In this paper atmospheric infrasounds are proposed as the elusive longrange cues constituting the avian navigational map. Although infrasounds were considered a viable candidate for the avian map in...
Ground-penetrating radar: A tool for monitoring bridge scour
N.L. Anderson, A.M. Ismael, T. Thitimakorn
2007, Environmental & Engineering Geoscience (13) 1-10
Ground-penetrating radar (GPR) data were acquired across shallow streams and/or drainage ditches at 10 bridge sites in Missouri by maneuvering the antennae across the surface of the water and riverbank from the bridge deck, manually or by boat. The acquired two-dimensional and three-dimensional data sets accurately image the channel bottom,...
Modelingevapotranspirationina sub-tropical climate
M.R. Savabi, T.A. Cochrane, E. German, C. Ikiz, N. Cockshutt
2007, Journal of Environmental Hydrology (15) 1-15
Evapotranspiration (ET) loss is estimated at about 80-85% of annual precipitation in South Florida. Accurate prediction of ET is important during and beyond the implementation of the Comprehensive Everglades Restoration Plan (CERP). In the USDA's Everglades Agro-Hydrology Model (EAHM) the soil water intake is linked with the soil water redistribution,...
Surface drifter derived circulation in the northern and middle Adriatic Sea: Response to wind regime and season
L. Ursella, P.-M. Poulain, R. P. Signell
2007, Journal of Geophysical Research C: Oceans (112)
More than 120 satellite-tracked drifters were deployed in the northern and middle Adriatic (NMA) Sea between September 2002 and November 2003, with the purpose of studying the surface circulation at mesoscale to seasonal scale in relation to wind forcing, river runoff, and bottom topography. Pseudo-Eulerian and Lagrangian statistics were calculated...
Prioritizing bottomland hardwood forest sites for protection and augmentation
J. Carter, J. Biagas
2007, Natural Areas Journal (27) 72-82
Bottomland hardwood forest has been greatly diminished by conversion to agriculture. Less than 25% of the pre-Columbian bottomland hardwood forests remain in the southeastern United States. Because of the valuable ecological and hydrological functions performed by these forests, their conservation and restoration has been a high priority. Part of these...
Variation in northern bobwhite demography along two temporal scales
T.H. Folk, Randall R. Holmes, J. Barry Grand
2007, Population Ecology (49) 211-219
Quantification and understanding of demographic variation across intra- and inter-annual temporal scales can benefit from the development of theoretical models of evolution and applied conservation of species. We used long-term survey data for northern bobwhites (Colinus virginianus) collected at the northern and southern extent of its geographic range to develop...
Use of behavioral and physiological indicators to evaluate Scaphirhynchus sturgeon spawning success
A. J. DeLonay, D. M. Papoulias, M. L. Wildhaber, M.L. Annis, J.L. Bryan, S.A. Griffith, S. H. Holan, D. E. Tillitt
2007, Journal of Applied Ichthyology (23) 428-435
Thirty gravid, female shovelnose sturgeon (Scaphirhynchus platorynchus) were captured in the Lower Missouri River in March 2004 to evaluate the effectiveness of physiology, telemetry and remote sensor technology coupled with change point analysis in identifying when and where Scaphirhynchus sturgeon spawn. Captured sturgeons were instrumented with ultrasonic transmitters and with...
Geostatistical three-dimensional modeling of oolite shoals, St. Louis Limestone, southwest Kansas
L. Qi, T.R. Carr, R.H. Goldstein
2007, American Association of Petroleum Geologists Bulletin (91) 69-96
In the Hugoton embayment of southwestern Kansas, reservoirs composed of relatively thin (<4 m; <13.1 ft) oolitic deposits within the St. Louis Limestone have produced more than 300 million bbl of oil. The geometry and distribution of oolitic deposits control the heterogeneity of the reservoirs, resulting in exploration challenges and...
Climate correlates of 20 years of trophic changes in a high-elevation riparian system
T. E. Martin
2007, Ecology (88) 367-380
The consequences of climate change for ecosystem structure and function remain largely unknown. Here, I examine the ability of climate variation to explain long-term changes in bird and plant populations, as well as trophic interactions in a high-elevation riparian system in central Arizona, USA, based on 20 years of study....
Composite analysis for Escherichia coli at coastal beaches
E.E. Bertke
2007, Journal of Great Lakes Research (33) 335-341
At some coastal beaches, concentrations of fecal-indicator bacteria can differ substantially between multiple points at the same beach at the same time. Because of this spatial variability, the recreational water quality at beaches is sometimes determined by stratifying a beach into several areas and collecting a sample from each area...
TerraLook: Providing easy, no-cost access to satellite images for busy people and the technologically disinclined
G.N. Geller, Eugene A. Fosnight, Sambhudas Chaudhuri
2007, Conference Paper, International Geoscience and Remote Sensing Symposium (IGARSS)
Access to satellite images has been largely limited to communities with specialized tools and expertise, even though images could also benefit other communities. This situation has resulted in underutilization of the data. TerraLook, which consists of collections of georeferenced JPEG images and an open source toolkit...
How was the Triassic Songpan-Ganzi basin filled? A provenance study
E. Enkelmann, A. Weislogel, L. Ratschbacher, E. Eide, A. Renno, J. Wooden
2007, Tectonics (26)
The Triassic Songpan-Ganzi complex comprises >200,000 km2 of 5-15 km thick turbiditic sediments. Although surrounded by several magmatic and orogenic belts, the Triassic high- and ultrahigh-pressure Qinling-Tongbai-Hong'an-Dabie (QTHD) orogen, located several hundred kilometers to the east, was proposed as its major source. Middle to Late Triassic samples from the northern...
Improving the accuracy of sediment-associated constituent concentrations in whole storm water samples by wet-sieving
W.R. Selbig, R. Bannerman, G. Bowman
2007, Journal of Environmental Quality (36) 226-232
Sand-sized particles (>63 ??m) in whole storm water samples collected from urban runoff have the potential to produce data with substantial bias and/or poor precision both during sample splitting and laboratory analysis. New techniques were evaluated in an effort to overcome some of the limitations associated with sample splitting and...
Thermal infrared reflectance and emission spectroscopy of quartzofeldspathic glasses
J.M. Byrnes, M.S. Ramsey, P.L. King, R.J. Lee
2007, Geophysical Research Letters (34)
This investigation seeks to better understand the thermal infrared (TIR) spectral characteristics of naturally-occurring amorphous materials through laboratory synthesis and analysis of glasses. Because spectra of glass phases differ markedly from their mineral counterparts, examination of glasses is important to accurately determine the composition of amorphous surface materials using remote...
Digital floodplain mapping and an analysis of errors involved
C.S. Hamblen, D.T. Soong, X. Cai
2007, Conference Paper, Examining the Confluence of Environmental and Water Concerns - Proceedings of the World Environmental and Water Resources Congress 2006
Mapping floodplain boundaries using geographical information system (GIS) and digital elevation models (DEMs) was completed in a recent study. However convenient this method may appear at first, the resulting maps potentially can have unaccounted errors. Mapping the floodplain using GIS is faster than mapping manually, and digital mapping is expected...
