To the National Map and beyond
J. Kelmelis
2003, Cartography and Geographic Information Science (30) 185-198
Scientific understanding, technology, and social, economic, and environmental conditions have driven a rapidly changing demand for geographic information, both digital and analog. For more than a decade, the U.S. Geological Survey (USGS) has been developing innovative partnerships with other government agencies and private industry to produce and distribute geographic information...
Clay-mineral suites, sources, and inferred dispersal routes: Southern California continental shelf
J.R. Hein, J.S. Dowling, A. Schuetze, H.J. Lee
2003, Marine Environmental Research (56) 79-102
Clay mineralogy is useful in determining the distribution, sources, and dispersal routes of fine-grained sediments. In addition, clay minerals, especially smectite, may control the degree to which contaminants are adsorbed by the sediment. We analyzed 250 shelf sediment samples, 24 river-suspended-sediment samples, and 12 river-bed samples for clay-mineral contents in...
The influence of gender on the relationship between wildlife value orientations, beliefs, and the acceptability of lethal deer control in Cuyahoga Valley National Park
E.M. Dougherty, D.C. Fulton, D.H. Anderson
2003, Society and Natural Resources (16) 603-623
This study examines how wildlife value orientations, attitudes, and gender influence acceptance of lethal actions to control deer in Cuyahoga Valley National Park in Ohio. Data were collected from female and male residents (n = 659) in a nine-county area, the primary service area of the park. Females and males...
Habitat association, size, stomach contents, and reproductive condition of Puerto Rican boas (Epicrates inornatus)
J. W. Wiley
2003, Caribbean Journal of Science (39) 189-194
The Puerto Rican boa occurs in a variety of habitats, including wet montane forest, lowland wet forest, mangrove forest, wet limestone karst, and offshore cays, and from sea level to 480 m. Mean SVL of 49 encountered boas (live and road-killed) was 136.9 ?? 35.1 (range = 38.8-205 cm), with...
Some observations on colocated and closely spaced strong ground-motion records of the 1999 Chi-Chi, Taiwan, earthquake
G.-Q. Wang, D.M. Boore, H. Igel, X.-Y. Zhou
2003, Bulletin of the Seismological Society of America (93) 674-693
The digital accelerograph network installed in Taiwan produced a rich set of records from the 20 September 1999 Chi-Chi, Taiwan earthquake (Mw 7.6). Teledyne Geotech model A-800 and A-900A* digital accelerographs were colocated at 22 stations that recorded this event. Comparisons of the amplitudes, frequency content, and baseline offsets show...
A Visual Basic program to classify sediments based on gravel-sand-silt-clay ratios
L.J. Poppe, A.H. Eliason, M. E. Hastings
2003, Computers & Geosciences (29) 805-809
Nomenclature describing size distributions is important to geologists because grain size is the most basic attribute of sediments. Traditionally, geologists have divided sediments into four size fractions that include gravel, sand, silt, and clay, and classified these sediments based on ratios of the various proportions of the fractions. Definitions of...
Development of a multimetric index for assessing the biological condition of the Ohio River
E.B. Emery, T.P. Simon, F.H. McCormick, P. L. Angermeier, J.E. Deshon, C.O. Yoder, R.E. Sanders, W.D. Pearson, G.D. Hickman, R.J. Reash, J.A. Thomas
2003, Transactions of the American Fisheries Society (132) 791-808
The use of fish communities to assess environmental quality is common for streams, but a standard methodology for large rivers is as yet largely undeveloped. We developed an index to assess the condition of fish assemblages along 1,580 km of the Ohio River. Representative samples of fish assemblages were collected...
Coexistence in a multispecies assemblage of eagles in central Asia
T.E. Katzner, E. A. Bragin, S.T. Knick, A.T. Smith
2003, Condor (105) 538-551
We evaluated factors that permit species coexistence in an exceptional assemblage of similar raptor species at the Naurzum Zapovednik (a national nature reserve) in north-central Kazakhstan. White-tailed Sea-Eagle (Haliaeetus albicilla), Imperial Eagle (Aquila heliaca), Golden Eagle (A. chrysaetos), and Steppe Eagle (A. nipalensis) all breed at the Zapovednik. Steppe Eagle...
Simulating ground water-lake interactions: Approaches and insights
R. J. Hunt, H.M. Haitjema, J. T. Krohelski, D. T. Feinstein
2003, Ground Water (41) 227-237
Approaches for modeling lake-ground water interactions have evolved significantly from early simulations that used fixed lake stages specified as constant head to sophisticated LAK packages for MODFLOW. Although model input can be complex, the LAK package capabilities and output are superior to methods that rely on a fixed lake stage...
Physiological responses of juvenile rainbow trout to fasting and swimming activity: Effects on body composition and condition indices
D.G. Simpkins, W.A. Hubert, Del Rio, D.C. Rule
2003, Transactions of the American Fisheries Society (132) 576-589
The physiological traits that allow fish to survive periods of limited food resources are poorly understood. We assessed changes in proximate body composition, relative organ mass, blood metabolites, and relative weight (Wr) of sedentary and actively swimming (15 cm/s) juvenile rainbow trout (154-182 mm total length) over 147 d of...
Shallow soil CO2 flow along the San Andreas and Calaveras Faults, California
J.L. Lewicki, William C. Evans, G.E. Hilley, M.L. Sorey, J.D. Rogie, S.L. Brantley
2003, Journal of Geophysical Research B: Solid Earth (108)
We evaluate a comprehensive soil CO2 survey along the San Andreas fault (SAF) in Parkfield, and the Calaveras fault (CF) in Hollister, California, in the context of spatial and temporal variability, origin, and transport of CO2 in fractured terrain. CO2 efflux was measured within grids with portable instrumentation and continously...
Slip distribution of the 1952 Tokachi-Oki earthquake (M 8.1) along the Kuril Trench deduced from tsunami waveform inversion
K. Hirata, E. Geist, K. Satake, Y. Tanioka, S. Yamaki
2003, Journal of Geophysical Research B: Solid Earth (108)
We inverted 13 tsunami waveforms recorded in Japan to estimate the slip distribution of the 1952 Tokachi-Oki earthquake (M 8.1), which occurred southeast off Hokkaido along the southern Kuril subduction zone. The previously estimated source area determined from tsunami travel times [Hatori, 1973] did not coincide with the observed aftershock...
Estimating population trends with a linear model
Jonathan Bart, Brian D. Collins, R. I. G. Morrison
2003, The Condor (105) 367-372
We describe a simple and robust method for estimating trends in population size. The method may be used with Breeding Bird Survey data, aerial surveys, point counts, or any other program of repeated surveys at permanent locations. Surveys need not be made at each location during each survey period. The...
Changes in sediment-associated trace element concentrations in the Seine river basin (1994-2001)
Michel Meybeck, A. J. Horowitz, C. Grosbois, Y. Gueguen
Boutron C.Ferrari C., editor(s)
2003, Conference Paper, Journal De Physique. IV : JP
In the 1980's, based on the concentrations of particulate-associated Hg, Cd, Pb, Cu and Zn relative to very low natural background levels, the Seine River Basin was one of the most impacted in the world. Over the past 20 years, there has been a general decline in these elevated concentrations...
Influence of transitional volcanic strata on lateral diversion at Yucca Mountain, Nevada
Lorraine E. Flint, Alan L. Flint, John S. Selker
2003, Water Resources Research (39) 4-1-4-17
Natural hydraulic barriers exist at Yucca Mountain, Nevada, a potential high‐level nuclear waste repository, that have been identified as possible lateral diversions for reducing deep percolation through the waste storage area. Historical development of the conceptual model of lateral diversion has been limited by available field data, but numerical investigations...
MODFLOW 2000 Head Uncertainty, a First-Order Second Moment Method
H.S. Glasgow, M.D. Fortney, J. Lee, A.J. Graettinger, H. W. Reeves
2003, Ground Water (41) 342-350
A computationally efficient method to estimate the variance and covariance in piezometric head results computed through MODFLOW 2000 using a first-order second moment (FOSM) approach is presented. This methodology employs a first-order Taylor series expansion to combine model sensitivity with uncertainty in geologic data. MODFLOW 2000 is used to calculate...
Simplified method for detecting tritium contamination in plants and soil
Brian J. Andraski, Mark W. Sandstrom, R. L. Michel, J.C. Radyk, David A. Stonestrom, M. J. Johnson, C.J. Mayers
2003, Journal of Environmental Quality (32) 988-995
Cost-effective methods are needed to identify the presence and distribution of tritium near radioactive waste disposal and other contaminated sites. The objectives of this study were to (i) develop a simplified sample preparation method for determining tritium contamination in plants and (ii) determine if plant data could be used as...
Inorganic nitrogen transformations in the bed of the Shingobee River, Minnesota: Integrating hydrologic and biological processes using sediment perfusion cores
R.W. Sheibley, J.H. Duff, A. P. Jackman, F.J. Triska
2003, Limnology and Oceanography (48) 1129-1140
Inorganic N transformations were examined in streambed sediments from the Shingobee River using sediment perfusion cores. The experimental design simulated groundwater-stream water mixing within sediment cores, which provided a well-defined one-dimensional representation of in situ hydrologic conditions. Two distinct hydrologic and chemical settings were preserved in the sediment cores: the...
Density of the continental roots: Compositional and thermal contributions
M.K. Kaban, P. Schwintzer, I.M. Artemieva, Walter D. Mooney
2003, Earth and Planetary Science Letters (209) 53-69
The origin and evolution of cratonic roots has been debated for many years. Precambrian cratons are underlain by cold lithospheric roots that are chemically depleted. Thermal and petrologic data indicate that Archean roots are colder and more chemically depleted than Proterozoic roots. This observation has led to the hypothesis that...
Bioreactors for removing methyl bromide following contained fumigations
Laurence G. Miller, Shaun Baesman, Ronald S. Oremland
2003, Environmental Science & Technology (37) 1698-1704
Use of methyl bromide (MeBr) as a quarantine, commodity, or structural fumigant is under scrutiny because its release to the atmosphere contributes to the depletion of stratospheric ozone. A closed-system bioreactor consisting of...
Comparison of approaches for simulating reactive solute transport involving organic degradation reactions by multiple terminal electron acceptors
Gary P. Curtis
2003, Computers & Geosciences (29) 319-329
Reactive solute transport models are useful tools for analyzing complex geochemical behavior resulting from biodegradation of organic compounds by multiple terminal electron acceptors (TEAPs). The usual approach of simulating the reactions of multiple TEAPs by an irreversible Monod rate law was compared with simulations that assumed a partial local equilibrium...
Shallow-velocity models at the Kilauea Volcano, Hawaii, determined from array analyses of tremor wavefields
G. Saccorotti, B. Chouet, P. Dawson
2003, Geophysical Journal International (152) 633-648
The properties of the surface wavefield at Kilauea Volcano are analysed using data from small-aperture arrays of short-period seismometers deployed in and around the Kilauea caldera. Tremor recordings were obtained during two Japan-US cooperative experiments conducted in 1996 and 1997. The seismometers were deployed in three semi-circular arrays with apertures...
Annual variations of biomass and photosynthesis in Zostera marina at its southern end of distribution in the North Pacific
Alejandro Cabello-Pasini, Raquel Muniz-Salazar, David H. Ward
2003, Aquatic Botany (76) 31-47
Density, biomass, morphology, phenology and photosynthetic characteristics of Zostera marina were related to continuous measurements of in situ irradiance, attenuation coefficient and temperature at three coastal lagoons in Baja California, Mexico. In situ irradiance was approximately two-fold lower at San Quintin Bay (SQ) than at Ojo de Liebre Lagoon (OL)...
Body weight and rumen-reticulum capacity in tule elk and mule deer
F.W. Weckerly, V. C. Bleich, C.-L.B. Chetkiewicz, M.A. Ricca
2003, Journal of Mammalogy (84) 659-664
The relationship between body size and rumen-reticulum capacity among conspecific individuals is predicted to be isometric. We examined whether the relationship between body weight and rumen-reticulum capacity was isometric in adult male and female rule elk (Cervus elaphus nannodes) and in adult female mule deer (Odocoileus hemionus). We detected no...
Optical dating of tufa via in situ aeolian sand grains: A case example from the Southern High Plains, USA
J. Rich, S. Stokes, W. Wood, R. Bailey
2003, Conference Paper, Quaternary Science Reviews
Precipitated carbonates (commonly termed tufas or travertines) maybe of considerable utility for palaeoenvironmental reconstruction. Their potential, however, for such reconstruction is commonly limited by difficulties associated with their absolute age control. Attempts to date such deposits via uranium series techniques have been complicated by their chemically open behaviour. Here we...
