National large-scale urban true orthophoto mapping and its standard initiative
G. Zhou, W. Xie, S. Benjamin, R.G. Fegeas, J. Simmers, H. Cluff, Y. Lei, J. Foust
2006, Conference Paper, ACM International Conference Proceeding Series
[No abstract available]...
Biogeochemical transport in the Loxahatchee River estuary, Florida: The role of submarine groundwater discharge
P.W. Swarzenski, W. H. Orem, B. F. McPherson, M. Baskaran, Y. Wan
2006, Marine Chemistry (101) 248-265
The distributions of dissolved organic carbon (DOC), Ba, U, and a suite of naturally occurring radionuclides in the U/Th decay series (222Rn, 223,224,226,228Ra) were studied during high- and low-discharge conditions in the Loxahatchee River estuary, Florida to examine the role of submarine groundwater discharge in estuarine transport. The fresh water...
Sizing up oil on Alaska's North Slope
K. J. Bird, D.W. Houseknecht
2006, Geotimes (51) 24-27
[No abstract available]...
The heartbeat of the volcano: The discovery of episodic activity at Prometheus on Io
Ashley G. Davies, Lionel Wilson, Dennis Matson, Giovanni Leone, Laszlo P. Keszthelyi, Windy L. Jaeger
2006, Icarus (184) 460-477
The temporal signature of thermal emission from a volcano is a valuable clue to the processes taking place both at and beneath the surface. The Galileo Near Infrared Mapping Spectrometer (NIMS) observed the volcano Prometheus, on the jovian moon Io, on multiple occasions between 1996 and 2002. The 5 micron (μm) brightness of this volcano shows...
Lesser scaup winter foraging and nutrient reserve acquisition in east-central Florida
G. Herring, J.A. Collazo
2006, Journal of Wildlife Management (70) 1682-1689
Lesser scaup (Aythya affinis) populations have been declining since the late 1970s. One of the explanations to account for this decline, the spring-condition hypothesis (SCH), is based on the premise that scaup are limited by their ability to acquire or maintain nutrient reserves during migration to the breeding grounds, leading...
Characterization of microsatellite loci isolated in trumpeter swan (Cygnus buccinator)
J. St John, F.A. Ransler, T.W. Quinn, S.J. Oyler-McCance
2006, Molecular Ecology Notes (6) 1083-1085
Primers for 16 microsatellite loci were developed for the trumpeter swan (Cygnus buccinator), a species recovering from a recent population bottleneck. In a screen of 158 individuals, the 16 loci were found to have levels of variability ranging from two to seven alleles. No loci were found to be linked,...
Predicting minimum habitat characteristics for the Indiana bat in the Champlain Valley
K.S. Watrous, T.M. Donovan, R.M. Mickey, S.R. Darling, A.C. Hicks, S. L. Von Oettingen
2006, Journal of Wildlife Management (70) 1228-1237
Predicting potential habitat across a landscape for rare species is extremely challenging. However, partitioned Mahalanobis D2 methods avoid pitfalls commonly encountered when surveying rare species by using data collected only at known species locations. Minimum habitat requirements are then determined by examining a principal components analysis to find consistent habitat...
Effects of watershed land use on nitrogen concentrations and δ15 nitrogen in groundwater
Marci L. Cole, Kevin D. Kroeger, J.W. McClelland, I. Valiela
2006, Biogeochemistry (77) 199-215
Eutrophication is a major agent of change affecting freshwater, estuarine, and marine systems. It is largely driven by transportation of nitrogen from natural and anthropogenic sources. Research is needed to quantify this nitrogen delivery and to link the delivery to specific land-derived sources. In this study we measured...
Shallow-water pockmark formation in temperate estuaries: A consideration of origins in the western gulf of Maine with special focus on Belfast Bay
J.N. Rogers, J. T. Kelley, D. F. Belknap, A. Gontz, W. A. Barnhardt
2006, Marine Geology (225) 45-62
A systematic mapping program incorporating more than 5000 km of side scan sonar and seismic reflection tracklines in the western Gulf of Maine has identified more than 70 biogenic natural gas deposits, occupying 311 km 2 in nearshore muddy embayments. Many of these embayments also contain pockmark fields, with some...
Estimating snow leopard population abundance using photography and capture-recapture techniques
R.M. Jackson, J.D. Roe, R. Wangchuk, D.O. Hunter
2006, Wildlife Society Bulletin (34) 772-781
Conservation and management of snow leopards (Uncia uncia) has largely relied on anecdotal evidence and presence-absence data due to their cryptic nature and the difficult terrain they inhabit. These methods generally lack the scientific rigor necessary to accurately estimate population size and monitor trends. We evaluated the use of photography...
Santa Barbara Basin study extends global climate record
C. Nicholson, J. Kennett, C. Sorlien, S. Hopkins, R. Behl, William Normark, R. Sliter, T. Hill, D. Pak, A. Schimmelmann, K. Cannariato
2006, Eos, Transactions, American Geophysical Union (87) 205-207
[No abstract available]...
The effect of calcium on aqueous uranium(VI) speciation and adsorption to ferrihydrite and quartz
P.M. Fox, J.A. Davis, J.M. Zachara
2006, Geochimica et Cosmochimica Acta (70) 1379-1387
Recent studies of uranium(VI) geochemistry have focused on the potentially important role of the aqueous species, CaUO2(CO3)32− and Ca2UO2(CO3)30(aq), on inhibition of microbial reduction and uranium(VI) aqueous speciation in contaminated groundwater. However, to our knowledge, there have been no direct studies of the effects...
Mississippi delta mudflow activity and 2005 gulf hurricanes
J.P. Walsh, D.R. Corbett, D. Mallinson, M. Goni, M. Dail, C. Loewy, K. Marciniak, K. Ryan, C. Smith, A. Stevens, B. Summers, T. Test
2006, Eos, Transactions, American Geophysical Union (87) 477-479
[No abstract available]...
A reexamination of age-related variation in body weight and morphometry of Maryland nutria
M. H. Sherfy, T.A. Mollett, K.R. McGowan, S.L. Daugherty
2006, Journal of Wildlife Management (70) 1132-1141
Age-related variation in morphometry has been documented for many species. Knowledge of growth patterns can be useful for modeling energetics, detecting physiological influences on populations, and predicting age. These benefits have shown value in understanding population dynamics of invasive species, particularly in developing efficient control and eradication programs. However, development...
Geology and geochemistry of jasperoids from the Gold Bar district, Nevada
O. Yigit, A. H. Hofstra, M.W. Hitzman, E.P. Nelson
2006, Mineralium Deposita (41) 527-547
Gold Bar is one of several Carlin-type gold mining districts located in the Battle Mountain-Eureka trend, Nevada. It is composed of one main deposit, Gold Bar; five satellite deposits; and four resources that contain 1.6 Moz (50 t) of gold. All of the deposits and resources occur at the intersection...
Cassini/VIMS hyperspectral observations of the HUYGENS landing site on Titan
S. Rodriguez, Stéphane Le Mouélic, Christophe Sotin, H. Clenet, R. N. Clark, B. Buratti, R. H. Brown, T. B. McCord, P. D. Nicholson, K. H. Baines
2006, Planetary and Space Science (54) 1510-1523
Titan is one of the primary scientific objectives of the NASA-ESA-ASI Cassini-Huygens mission. Scattering by haze particles in Titan's atmosphere and numerous methane absorptions dramatically veil Titan's surface in the visible range, though it can be studied more easily in some narrow infrared windows. The Visual and Infrared Mapping Spectrometer...
Factors influencing soil invertebrate communities in riparian grasslands of the central platte river floodplain
C.A. Davis, J. E. Austin, D. A. Buhl
2006, Wetlands (26) 438-454
In the Platte River Valley of central Nebraska, USA, riparian grasslands (also known as wet meadows) have been severely impacted by a reduction in river flows, causing lower ground-water levels and altered seasonal hydroperiods. The potential impacts of these hydrologic changes, as well as the environmental factors that influence wet...
Earthquake ground-motion prediction equations for eastern North America
G. M. Atkinson, D.M. Boore
2006, Bulletin of the Seismological Society of America (96) 2181-2205
New earthquake ground-motion relations for hard-rock and soil sites in eastern North America (ENA), including estimates of their aleatory uncertainty (variability) have been developed based on a stochastic finite-fault model. The model incorporates new information obtained from ENA seismographic data gathered over the past 10 years, including three-component broadband data...
Biogeochemical characterization of an undisturbed highly acidic, metal-rich bryophyte habitat, east-central Alaska, U.S.A.
L. P. Gough, R. G. Eppinger, Paul H. Briggs, S. Giles
2006, Arctic, Antarctic, and Alpine Research (38) 522-529
We report on the geochemistry of soil and bryophyte-laden sediment and on the biogeochemistry of willows growing in an undisturbed volcanogenic massive sulfide deposit in the Alaska Range ecoregion of east-central Alaska. We also describe an unusual bryophyte assemblage found growing in the acidic metal-rich waters that drain the area....
Seed germination of cirsium arvense and Lepidium latifolium: Implications for management of montane wetlands
M.K. Laubhan, T.L. Shaffer
2006, Wetlands (26) 69-78
Cirsium arvense and Lepidium latifolium are species that can aggressively invade wetland margins and potentially reduce biodiversity and alter ecosystem function. Although expansion of these species primarily occurs via rhizomatous growth, seeds are thought to be important in initial establishment. We conducted this study to investigate differences in seed germination...
Seasonal migration and environmental conditions of Pacific halibut Hippoglossus stenolepis, elucidated from pop-up archival transmitting (PAT) tags
Timothy Loher, Andrew C. Seitz
2006, Marine Ecology Progress Series (317) 259-271
Pop-up archival transmitting (PAT) tags were used to study the fall migration of halibut in the Gulf of Alaska (GOA). We tagged 6 Pacific halibut Hippoglossus stenolepis on summer feeding grounds in the eastern GOA and another 6 in the western GOA from June 13 to August 6, 2002. The...
Determination of coalbed methane potential and gas adsorption capacity in Western Kentucky coals
S.M. Mardon, K.G. Takacs, J.C. Hower, C.F. Eble, Maria Mastalerz
2006, Conference Paper, 23rd Annual International Pittsburgh Coal Conference, PCC - Coal-Energy, Environment and Sustainable Development
The Illinois Basin has not been developed for Coalbed Methane (CBM) production. It is imperative to determine both gas content and other parameters for the Kentucky portion of the Illinois Basin if exploration is to progress and production is to occur in this area. This research is part of a...
Coal geochemistry in the service of archaeology
C.A. Palmer, R. B. Finkelman
2006, International Journal of Coal Geology (66) 151-152
[No abstract available]...
Multiple edifice-collapse events in the Eastern Mexican Volcanic Belt: The role of sloping substrate and implications for hazard assessment
Gerardo Carrasco-Nunez, Rodolfo Diaz-Castellon, Lee Siebert, B. Hubbard, M.F. Sheridan, Sergio R. Rodriguez
2006, Journal of Volcanology and Geothermal Research (158) 151-176
The Citlalte??petl-Cofre de Perote volcanic chain forms an important physiographic barrier that separates the Central Altiplano (2500??masl) from the Gulf Coastal Plain (GCP) (1300??masl). The abrupt eastward drop in relief between these provinces gives rise to unstable conditions and consequent gravitational collapse of large volcanic edifices built at the edge...
Fast simulated annealing inversion of surface waves on pavement using phase-velocity spectra
N. Ryden, C.B. Park
2006, Geophysics (71)
The conventional inversion of surface waves depends on modal identification of measured dispersion curves, which can be ambiguous. It is possible to avoid mode-number identification and extraction by inverting the complete phase-velocity spectrum obtained from a multichannel record. We use the fast simulated annealing (FSA) global search algorithm to minimize...
