Nitrogen
D.A. Kramer
2006, Mining Engineering (58) 45-46
In 2005, ammonia was produced by 15 companies at 26 plants in 16 states in the United States. Of the total ammonia production capacity, 55% was centered in Louisiana, Oklahoma and Texas because of their large reserves of natural gas. US producers operated at 66% of their rated capacity. In...
State summaries: Indiana
K.R. Shaffer
2006, Mining Engineering (58) 90-92
In 2005, the Indiana industrial minerals industry generated $789 million, a record high for the state and an increase of 2.2% from 2004. Among all states, Indiana ranked 24th. Mineral commodities produced in the state included crushed limestone and dolomite, construction sand and gravel, industrial sand, dimension limestone, dimension sandstone,...
Effect of summer throughfall exclusion, summer drought, and winter snow cover on methane fluxes in a temperate forest soil
W. Borken, E.A. Davidson, K. Savage, E.T. Sundquist, P. Steudler
2006, Soil Biology and Biochemistry (38) 1388-1395
Soil moisture strongly controls the uptake of atmospheric methane by limiting the diffusion of methane into the soil, resulting in a negative correlation between soil moisture and methane uptake rates under most non-drought conditions. However, little is known about the effect of water stress on methane uptake in temperate forests...
Geochemical constraints on the genesis of the Scheelite dome intrusion-related gold deposit, Tombstone gold belt, Yukon, Canada
J.L. Mair, R.J. Goldfarb, C. A. Johnson, C.J.R. Hart, E.E. Marsh
2006, Economic Geology (101) 523-553
The Scheelite dome intrusion-related gold deposit, western Selwyn basin, Yukon, is hosted in hornfelsed metasedimentary strata that lie adjacent to the exposed apices of a monzogranite to quartz monzonite plutonic complex of the mid-Cretaceous Tombstone-Tungsten magmatic belt, Tintina gold province, Alaska and Yukon. A variety of mineralization styles occur throughout...
Inverse modeling for seawater intrusion in coastal aquifers: Insights about parameter sensitivities, variances, correlations and estimation procedures derived from the Henry problem
E. Sanz, C.I. Voss
2006, Advances in Water Resources (29) 439-457
Inverse modeling studies employing data collected from the classic Henry seawater intrusion problem give insight into several important aspects of inverse modeling of seawater intrusion problems and effective measurement strategies for estimation of parameters for seawater intrusion. Despite the simplicity of the Henry problem, it embodies the behavior of a...
Differential response in chick survival to diet in least and crested auklets
Adrian E. Gall, D.D. Roby, D.B. Irons, I.C. Rose
2006, Marine Ecology Progress Series (308) 279-291
Least auklets Aethia pusilla and crested auklets A. cristatella are abundant planktivorous seabirds found throughout the Bering Sea and are inextricably linked to the secondary productivity of this northern marine ecosystem. We assessed the relationship between productivity and diet in least and crested auklets by examining breeding chronology, daily survival...
Sedimentary deposits of the 26 December 2004 tsunami on the northwest coast of Aceh, Indonesia
A. Moore, Y. Nishimura, G. Gelfenbaum, T. Kamataki, R. Triyono
2006, Earth, Planets and Space (58) 253-258
The 2004 Sumatra-Andaman tsunami flooded coastal northern Sumatra to a depth of over 20 m, deposited a discontinuous sheet of sand up to 80 cm thick, and left mud up to 5 km inland. In most places the sand sheet is normally graded, and in some it contains complex internal...
Glacial Lake Musselshell: Late Wisconsin slackwater on the Laurentide ice margin in central Montana, USA
N.K. Davis, W. W. Locke III, K. L. Pierce, R.C. Finkel
2006, Geomorphology (75) 330-345
Cosmogenic surface exposure ages of glacial boulders deposited in ice-marginal Lake Musselshell suggest that the lake existed between 20 and 11.5 ka during the Late Wisconsin glacial stage (MIS 2), rather than during the Late Illinoian stage (MIS 6) as traditionally thought. The altitude of the highest ice-rafted boulders and...
Gemstones
D.W. Olson
2006, Mining Engineering (58) 31-32
During 2005, the estimated value of natural gemstones produced from US deposits was $13.9 million. Production included agates, amber, beryl, coral, garnet, jade, jasper, opal, pearl, quartz, sapphire, shell, topaz, tourmaline, and torquoise among others. For the year, the US gemstone trade with all countries and territories exceeded $26 billion....
State summaries: West Virginia
B.M. Blake, N. Fedorko, G.H. McColloch
2006, Mining Engineering (58) 122-125
West Virginia mines coal, limestone, sandstone, gravel, clay and other nonfuel materials. Limestone production figures for 2005 are not yet available but in 2004, limestone production accounted for 85.7% of noncoal production on a tonnage basis. In 2005, 327 coal mines reported production during the year. Underground mining accounted for...
Wetlands in a dry landscape: [book review of] McKinstry, M.C., M.C. Hubert, and S.H. Anderson, (eds.). 2004. Wetland and riparian areas of the intermountain west: ecology and management. University of Texas Press, Austin, Texas, USA. 335 pp., US$39.95 (hardback), ISBN: 0-292-70248-5
G.T. Auble
2006, Wetlands (26) 284-286
No abstract available....
Application of airborne thermal imagery to surveys of Pacific walrus
D. M. Burn, M.A. Webber, Mark S. Udevitz
2006, Wildlife Society Bulletin (34) 51-58
We conducted tests of airborne thermal imagery of Pacific walrus to determine if this technology can be used to detect walrus groups on sea ice and estimate the number of walruses present in each group. In April 2002 we collected thermal imagery of 37 walrus groups in the Bering Sea...
Comment: "Silver sagebrush community associations in southeastern Alberta, Canada." Rangeland Ecology & Management 58:400-405
Cameron L. Aldridge, Mark S. Boyce
2006, Rangeland Ecology and Management (59) 107-108
No abstract available....
Habitat-based adaptive management at Mount Haggin Wildlife Management Area
R.B. Keigley, C.W. Fager
2006, Alces (42) 49-54
The 22,743-hectare Mount Haggin Wildlife Management Area was purchased in 1976, in part for moose (Alces alces) winter range. Observed moose populations climbed from a low of 7 in 1976 to a high of 56 in 2000. A 4-step management program was initiated in 2000 consisting of definition of management...
Multiple constraints on the age of a Pleistocene lava dam across the Little Colorado River at Grand Falls, Arizona
W. Duffield, N. Riggs, D. Kaufman, D. Champion, C. Fenton, S. Forman, W. McIntosh, R. Hereford, J. Plescia, M. Ort
2006, Geological Society of America Bulletin (118) 421-429
The Grand Falls basalt lava flow in northern Arizona was emplaced in late Pleistocene time. It flowed 10 km from its vent area to the Little Colorado River, where it cascaded into and filled a 65-m-deep canyon to form the Grand Falls lava dam. Lava continued ???25 km downstream and...
Genetic variation among subspecies of Least Tern (Sterna antillarum): Implications for conservation
Joanna B. Whittier, David M. Leslie Jr., Ronald A. Van Den Bussche
2006, Waterbirds (29) 176-184
DNA sequence variation from two nuclear introns and part of the mitochondrial cytochrome-b gene were used to Evaluate population structure among three subspecies of Least Term that nest in the United States (California [Sterna antillarum browni], Interior [S. a. athalassos], Eastern [S. a. antillarum]). Sequence variation was highest for nuclear...
Relationship between quartz trace elements and SEM-Cathodoluminescence textures revealed using WDS mapping techniques
H.A. Lowers, B.G. Rusk
2006, Conference Paper, Microscopy and Microanalysis
[No abstract available]...
Forage preferences in two species of prairie dog (Cynomys parvidens and Cynomus ludovicianus): Implications for hibernation and facultative heterothermy
E.M. Lehmer, E. Biggins, M.F. Antolin
2006, Journal of Zoology (269) 249-259
Several laboratory studies have shown that the ingestion of dietary linoleic (18:2 ??6) acid before winter can promote deep and continuous torpor, whereas excess consumption of ??-linolenic acid (18:3 ??3) can interfere with an animal's ability to reach and maintain low body temperatures during torpor. As mammalian heterotherms obtain linoleic...
Relationship between shrubs and foods in mountain plover habitat in Park County, Colorado
S.C. Schneider, Michael B. Wunder, F.L. Knopf
2006, Southwestern Naturalist (51) 197-202
We explored habitat use in terms of vegetation structure and potential forage availability for mountain plovers (Charadrius montanus) in Park County, Colorado. We quantified the percentage cover of bare ground, percentage cover of shrubs (Chrysothamnus visadiflorus), linear distance to nearest shrub, arthropod biomass, and grasshopper density for 102 plots of...
Assessment of pesticide residues in army cutworm moths (Euxoa auxiliaris) from the Greater Yellowstone Ecosystem and their potential consequences to foraging grizzly bears (Ursus arctos horribilis)
H. L. Robison, Charles C. Schwartz, J. D. Petty, P. F. Brussard
2006, Chemosphere (64) 1704-1712
During summer, a grizzly bear (Ursus arctos horribilis) in the Greater Yellowstone Ecosystem (GYE) (USA) can excavate and consume millions of army cutworm moths (Euxoa auxiliaris) (ACMs) that aggregate in high elevation talus. Grizzly bears in the GYE were listed as threatened by the US Fish and Wildlife Service in...
Recent observations of intraspecific predation and cannibalism among polar bears in the southern Beaufort Sea
Steven C. Amstrup, I. Stirling, T. S. Smith, C. Perham, G.W. Thiemann
2006, Polar Biology (29) 997-1002
Intraspecific killing has been reported among polar bears (Ursus maritimus), brown bears (U. arctos), and black bears (U. americanus). Although cannibalism is one motivation for such killings, the ecological factors mediating such events are poorly understood. Between 24 January and 10 April 2004, we confirmed three instances of intraspecific predation...
Monitoring planktivorous seabird populations: Validating surface counts of crevice-nesting auklets using mark-resight techniques
L.M. Sheffield, Adrian E. Gall, D.D. Roby, D.B. Irons, K.M. Dugger
2006, Canadian Journal of Zoology (84) 846-854
Least Auklets (Aethia pusilla (Pallas, 1811)) are the most abundant species of seabird in the Bering Sea and offer a relatively efficient means of monitoring secondary productivity in the marine environment. Counting auklets on surface plots is the primary method used to track changes in numbers of these crevice-nesters, but...
Establishment of non-native plant species after wildfires: Effects of fuel treatments, abiotic and biotic factors, and post-fire grass seeding treatments
M.E. Hunter, Philip N. Omi, E.J. Martinson, G.W. Chong
2006, International Journal of Wildland Fire (15) 271-281
Establishment and spread of non-native species following wildfires can pose threats to long-term native plant recovery. Factors such as disturbance severity, resource availability, and propagule pressure may influence where non-native species establish in burned areas. In addition, pre- and post-fire management activities may influence the likelihood of non-native species establishment....
Association of the 1886 Charleston, South Carolina, earthquake and seismicity near Summervile with a 12º bend in the East Coast fault system and triple-fault junctions
R. Marple, R. Miller
2006, Southeastern Geology (44) 101-127
Seismic-reflection data were integrated with other geophysical, geologic, and seismicity data to better determine the location and nature of buried faults in the Charleston, South Carolina, region. Our results indicate that the 1886 Charleston, South Carolina, earthquake and seismicity near Summerville are related to local stresses caused by a 12??...
Effects of permafrost melting on CO2 and CH4 exchange of a poorly drained black spruce lowland
K.P. Wickland, Robert G. Striegl, J. C. Neff, T. Sachs
2006, Journal of Geophysical Research G: Biogeosciences (111)
[1] Permafrost melting is occurring in areas of the boreal forest region where large amounts of carbon (C) are stored in organic soils. We measured soil respiration, net CO2 flux, and net CH4 flux during May–September 2003 and March 2004 in a black spruce lowland in interior Alaska to...
