Petrography, palynology, and paleoecology of the Lower Pennsylvanian Bon Air coal, Franklin County, Cumberland Plateau, southeast Tennessee
S.A. Shaver, C.F. Eble, J.C. Hower, F.L. Saussy
2006, International Journal of Coal Geology (67) 17-46
Stratigraphy, palynology, petrography, and geochemistry of the Bon Air coal from the Armfield, Dotson, Rutledge, and Shakerag mine sites of Franklin County, Tennessee suggest that Bon Air seams at all sites were small (??? 1.0 mile, 1.6 km), spatially distinct paleomires that evolved from planar to domed within the fluviodeltaic...
Gas slug ascent through changes in conduit diameter: Laboratory insights into a volcano-seismic source process in low-viscosity magmas
M.R. James, S.J. Lane, B. A. Chouet
2006, Journal of Geophysical Research B: Solid Earth (111)
Seismic signals generated during the flow and degassing of low-viscosity magmas include long-period (LP) and very-long-period (VLP) events, whose sources are often attributed to dynamic fluid processes within the conduit. We present the results of laboratory experiments designed to investigate whether the passage of a gas slug through regions of...
Associations between accelerated glacier mass wastage and increased summer temperature in coastal regions
M. Dyurgerov, G.J. McCabe
2006, Arctic, Antarctic, and Alpine Research (38) 190-197
Low-elevation glaciers in coastal regions of Alaska, the Canadian Arctic, individual ice caps around the Greenland ice sheet, and the Patagonia Ice Fields have an aggregate glacier area of about 332 ?? 103 km 2 and account for approximately 42% of all the glacier area outside the Greenland and Antarctic...
U-Pb SHRIMP dating of uraniferous opals
A.A. Nemchin, L.A. Neymark, S.L. Simons
2006, Chemical Geology (227) 113-132
U-Pb and U-series analyses of four U-rich opal samples using sensitive high-resolution ion microprobe (SHRIMP) demonstrate the potential of this technique for the dating of opals with ages ranging from several tens of thousand years to millions of years. The major advantages of the technique, compared to the conventional thermal...
Morphometric discrimination of early life stage Lampetra tridentata and L richardsoni (Petromyzonidae) from the Columbia river basin
M.H. Meeuwig, J.M. Bayer, R.A. Reiche
2006, Journal of Morphology (267) 623-633
The effectiveness of morphometric and meristic characteristics for taxonomic discrimination of Lampetra tridentata and L. richardsoni (Petromyzonidae) during embryological, prolarval, and early larval stages (i.e., age class 1) were examined. Mean chorion diameter increased with time from fertilization to hatch and was significantly greater for L. tridentata than for L....
Distribution and abundance of elkhorn coral, Acropora palmata, and prevalence of white-band disease at Buck Island Reef National Monument, St. Croix, US Virgin Islands
P.A. Mayor, C.S. Rogers, Z.-M. Hillis-Starr
2006, Coral Reefs (25) 239-242
In the 1970s and 1980s elkhorn coral, Acropora palmata, declined dramatically throughout the Caribbean primarily due to white-band disease (WBD). In 2005, elkhorn coral was proposed for listing as threatened under the US Endangered Species Act. WBD was first documented at Buck Island Reef National Monument (BIRNM). Together with hurricanes...
Parent birds assess nest predation risk and adjust their reproductive strategies
J.J. Fontaine, T. E. Martin
2006, Ecology Letters (9) 428-434
Avian life history theory has long assumed that nest predation plays a minor role in shaping reproductive strategies. Yet, this assumption remains conspicuously untested by broad experiments that alter environmental risk of nest predation, despite the fact that nest predation is a major source of reproductive failure. Here, we examined...
The role of environmental gradients in non-native plant invasion into burnt areas of Yosemite National Park, California
R. Klinger, E.C. Underwood, P.E. Moore
2006, Diversity and Distributions (12) 139-156
Fire is known to facilitate the invasion of many non-native plant species, but how invasion into burnt areas varies along environmental gradients is not well-understood. We used two pre-existing data sets to analyse patterns of invasion by non-native plant species into burnt areas along gradients of topography, soil and vegetation...
Relative importance of magnetic moments in UXO clearance applications
V. Sanchez, Y. Li, M. Nabighian, D. Wright
2006, SEG Technical Program Expanded Abstracts (25) 1381-1385
Surface magnetic anomaly observed in UXO clearance is mainly dipolar and, as a result, the dipole is the only moment used regularly in UXO applications. The dipole moment contains intensity of magnetization information but lacks shape information. Unlike dipole, higher-order moments, such as quadrupole and octupole, encode asymmetry properties of...
Water and solute mass balance of five small, relatively undisturbed watersheds in the U.S.
N.E. Peters, J. B. Shanley, Brent T. Aulenbach, R. M. Webb, K. Campbell, R. Hunt, M. C. Larsen, R.F. Stallard, J. Troester, J.F. Walker
2006, Science of the Total Environment (358) 221-242
Geochemical mass balances were computed for water years 1992-1997 (October 1991 through September 1997) for the five watersheds of the U.S. Geological Survey Water, Energy, and Biogeochemical Budgets (WEBB) Program to determine the primary regional controls on yields of the major dissolved inorganic solutes. The sites, which vary markedly with...
Plant species richness at different scales in native and exotic grasslands in Southeastern Arizona
S.P. McLaughlin, Janice E. Bowers
2006, Western North American Naturalist (66) 209-221
Species richness in Madrean mixed-grass prairies dominated by native or exotic species in southeastern Arizona was characterized at the community and point scales using ten 1-m2 quadrats nested within each of eight 1000-m2 plots. In the 1000-m2 plots average richness was significantly higher in oak savanna (OS, 121.0 species) than...
Extracellular and intracellular uptake of zinc in a photosynthetic biofilm matrix:
J.M. Morris, J.S. Meyer
2006, Bulletin of Environmental Contamination and Toxicology (77) 30-35
No abstract available....
The symposium in context
Dean E. Biggins
2006, Conference Paper, Recovery of the black-footed ferret: Progress and continuing challenges- Proceedings of the Symposium on the Status of the Black-footed Ferret and Its Habitat, Fort Collins, Colorado, January 28-29, 2004 (Scientific Investigations Report 2005-5293)
The black-footed ferret (Mustela nigripes) is a member of the weasel family (Mustelidae) and is closely related to the Siberian polecat (M. eversmannii) of Asian steppes and the European polecat (M. putorius). Compared to its relatives, the black-footed ferret is an extreme specialist, depending on the prairie dogs (Cynomys spp.)...
A method for mapping corn using the US Geological Survey 1992 National Land Cover Dataset
S.K. Maxwell, J.R. Nuckols, M.H. Ward
2006, Computers and Electronics in Agriculture (51) 54-65
Long-term exposure to elevated nitrate levels in community drinking water supplies has been associated with an elevated risk of several cancers including non-Hodgkin's lymphoma, colon cancer, and bladder cancer. To estimate human exposure to nitrate, specific crop type information is needed as fertilizer application rates vary widely by crop type....
The airborne lava-seawater interaction plume at Kilauea Volcano, Hawai'i
M. Edmonds, T.M. Gerlach
2006, Earth and Planetary Science Letters (244) 83-96
Lava flows into the sea at Kīlauea Volcano, Hawaiʻi, and generates an airborne gas and aerosol plume. Water (H2O), hydrogen chloride (HCl), carbon dioxide (CO2), nitrogen dioxide (NO2) and sulphur dioxide (SO2) gases were quantified in the plume in 2004–2005, using Open Path Fourier Transform infra-red Spectroscopy. The molar abundances...
Modeling decadal timescale interactions between surface water and ground water in the central Everglades, Florida, USA
J. W. Harvey, J.T. Newlin, S.L. Krupa
2006, Journal of Hydrology (320) 400-420
Surface-water and ground-water flow are coupled in the central Everglades, although the remoteness of this system has hindered many previous attempts to quantify interactions between surface water and ground water. We modeled flow through a 43,000 ha basin in the central Everglades called Water Conservation Area 2A. The purpose of...
Lithospheric controls on the formation of provinces hosting giant orogenic gold deposits
F.P. Bierlein, D.I. Groves, R.J. Goldfarb, B. Dube
2006, Mineralium Deposita (40) 874-886
Ages of giant gold systems (>500 t gold) cluster within well-defined periods of lithospheric growth at continental margins, and it is the orogen-scale processes during these mainly Late Archaean, Palaeoproterozoic and Phanerozoic times that ultimately determine gold endowment of a province in an orogen. A critical factor for giant orogenic...
Tests of landscape influence: Nest predation and brood parasitism in fragmented ecosystems
J.J. Tewksbury, L. Garner, S. Garner, J.D. Lloyd, V. Saab, T. E. Martin
2006, Ecology (87) 759-768
The effects of landscape fragmentation on nest predation and brood parasitism, the two primary causes of avian reproductive failure, have been difficult to generalize across landscapes, yet few studies have clearly considered the context and spatial scale of fragmentation. Working in two river systems fragmented by agricultural and rural-housing development,...
Monitoring bird populations in small geographic areas
Erica H. Dunn, J. Bart, B.T. Collins, B. Craig, B. Dale, C.M. Downes, C.M. Francis, S. Woodley, P. Zorn
2006, Occasional Paper of the Canadian Wildlife Service 1-59
Numerous methods exist for monitoring bird populations, and there is a large literature describing them. There are few resources, however, that provide comprehensive advice on every step of organizing and carrying out a survey, from the early stages of planning to final use of the data. Even fewer resources are...
Carbon dioxide emissions from vegetation-kill zones around the resurgent dome of Long Valley caldera, eastern California, USA
Deborah Bergfeld, William C. Evans, James F. Howle, Christopher D. Farrar
2006, Journal of Volcanology and Geothermal Research (152) 140-156
A survey of diffuse CO2 efflux, soil temperature and soil-gas chemistry over areas of localized vegetation-kill on and around the resurgent dome of Long Valley caldera California was performed to evaluate the premise that gaseous and thermal anomalies are related to renewed intrusion of magma....
Fault parameter constraints using relocated earthquakes: A validation of first-motion focal-mechanism data
Debi Kilb, J.L. Hardebeck
2006, Bulletin of the Seismological Society of America (96) 1140-1158
We estimate the strike and dip of three California fault segments (Calaveras, Sargent, and a portion of the San Andreas near San Jaun Bautistia) based on principle component analysis of accurately located microearthquakes. We compare these fault orientations with two different first-motion focal mechanism catalogs: the Northern California...
The conservation and population status of the world's waders at the turn of the millennium
David A. Stroud, Andy Baker, D.E. Blanco, Nick C. Davidson, B. Ganter, Robert E. Gill Jr., P.M. Gonzalez, L. Haanstra, R. I. G. Morrison, Theunis Piersma, D. Scott, O. Thorup, R. West, J.L. Wilson, Christoph Zockler
Gerard C. Boere, Colin A. Galbraith, David A. Stroud, editor(s)
2006, Conference Paper, Waterbirds around the world: A global overview of the conservation, management, and research of the world's waterbird flyways
Using information from many sources, but especially data collated for the third edition of Wetlands International’s Waterbird Population Estimates, we review the status of the world’s waders in the late 1990s. There are widespread declines in most regions and biotopes caused principally by loss and degradation of wetland (and other)...
Alternative barging strategies to improve survival of transported juvenile salmonids
G.A. McMichael, J.A. Vucelick, B. Ryan, L. Gilbreath, R.L. McComas, Styles Smith, M. Carper, D. Elliot, T. Murray, L. Applegate, C. McKibben
2006, Report
No abstract available ...
Colony mapping: A new technique for monitoring crevice-nesting seabirds
H.M. Renner, M. Renner, J.H. Reynolds, A.M.A. Harping, I.L. Jones, D.B. Irons, G.V. Byrd
2006, Condor (108) 423-434
Monitoring populations of auklets and other crevice-nesting seabirds remains problematic, although numerous methods have been attempted since the mid-1960s. Anecdotal evidence suggests several large auklet colonies have recently decreased in both abundance and extent, concurrently with vegetation encroachment and succession. Quantifying changes in the geographical extent of auklet colonies may...
State summaries: Illinois
Z. Lasemi, Donald G. Mikulic
2006, Mining Engineering (58) 86-90
According to the United States Geological Survey (USGS), Illinois ranked third in the amount of crushed stone produced from underground mining operations. In 2004, Illinois produced more than 76.5 Mt of crushed stone and 38.7 Mt of sand-and-gravel. Preliminary data for 2005 showed an increase in the production of crushed...
