Emerging themes in the ecology and management of North American forests
Terry L. Sharik, William Adair, Fred A. Baker, Michael Battaglia, Emily J. Comfort, Anthony W. D’Amato, Craig Delong, R. Justin DeRose, Mark J. Ducey, Mark Harmon, Louise Levy, Jesse A. Logan, Joseph O'Brien, Brian J. Palik, Scott D. Roberts, Paul C. Rogers, Douglas J. Shinneman, Thomas Spies, Sarah L. Taylor, Christopher Woodall, Andrew Youngblood
2010, International Journal of Forestry Research (2010)
The 7th North American Forest Ecology Workshop, consisting of 149 presentations in 16 oral sessions and a poster session, reflected a broad range of topical areas currently under investigation in forest ecology and management. There was an overarching emphasis on the role of disturbance, both natural and anthropogenic, in the...
Do three massive coral species from the same reef record the same SST signal? A test from the Dry Tortugas, Florida Keys
K. L. DeLong, R.Z. Poore, C. D. Reich, J. A. Flannery, Christopher R. Maupin, T. M. Quinn
2010, Conference Paper
Paleoclimatologists have reconstructed century-long records of sea surface temperature (SST) in the Pacific using the Sr/Ca of massive corals, whereas similar reconstructions in the Atlantic have not proceeded at the same pace. Past research in the Florida Keys has focused on Montastrea spp., an abundant and fast-growing massive coral, thus a...
Importance of benthic production to fish populations in Lake Mead prior to the establishment of quagga mussels
John Umek, Sudeep Chandra, Michael Rosen, Marion Wittmann, Joe Sullivan, Erik Orsak
2010, Lake and Reservoir Management (26) 293-305
Limnologists recently have developed an interest in quantifying benthic resource contributions to higher-level consumers. Much of this research focuses on natural lakes with very little research in reservoirs. In this study, we provide a contemporary snapshot of the food web structure of Lake Mead to evaluate the contribution of benthic...
Perlite
W.P. Bolen
2010, Mining Engineering (62) 67-67
Consumption, imports and domestic production of perlite in the United States continued to be severely affected by the multi-year downturn in construction activity and decreased consumer spending. The estimated amount of processed perlite sold or used from U.S. mines in 2009 fell to 380 kt (418,000 st), the lowest amount...
Earth mineral resource of the month: asbestos
Robert L. Virta
2010, Earth (55) 27-27
The article discusses the characteristics and feature of asbestos. According to the author, asbestos is a generic name for six needle-shaped minerals that possess high tensile strengths, flexibility, and resistance to chemical and thermal degradation. These minerals are actinolite, amosite, anthophyllite, chrysolite, crocilodite and tremolite. Asbestos is used for strengthening...
Mineral resource of the month: germanium
David Guberman
2010, Earth (55) 27-27
The article provides information on germanium, an element with electrical properties between those of a metal and an insulator. Applications of germanium include its use as a component of the glass in fiber-optic cable, in infrared optics devices and as a semiconductor and substrate used in electronic and solar applications....
Large-scale coastal change in the Columbia River littoral cell: an overview
Guy Gelfenbaum, George M. Kaminsky
2010, Marine Geology (273) 1-10
This overview introduces large-scale coastal change in the Columbia River littoral cell (CRLC). Covering 165 km of the southwest Washington and northwest Oregon coasts, the littoral cell is made up of wide low-sloping dissipative beaches, broad coastal dunes and barrier plains, three large estuaries, and is bounded by rocky headlands....
Geologic characteristics and movement of the Meadow Creek landslide, part of the Coal Hill landslide complex, western Kane County, Utah
Francis X. Ashland, Greg N. McDonald
Stephanie M. Carney, David E. Tabet, Cari L. Johnson, editor(s)
2010, Utah Geological Association Publication 39: Geology of South-Central Utah 38-60
The Meadow Creek landslide, part of the Coal Hill landslide complex in western Kane County, Utah, is about 1.7 miles (2.7 km) wide and 1.3 miles (2.1 km) long and contains six smaller historical slides. The upper part of the Meadow Creek landslide is gently sloping and consists of...
Groundwater hydrology--coastal flow
Ward E. Sanford
2010, Nature Geoscience (3) 671-672
How groundwater flow varies when long-term external conditions change is little documented. Geochemical evidence shows that sea-level rise at the end of the last glacial period led to a shift in the flow patterns of coastal groundwater beneath Florida....
Mineral resource of the month: silicon
Water Resources Division, U.S. Geological Survey
2010, Earth (55) 27-27
The article offers information about silicon, a metalloid element which is considered the second-most abundant element in the Earth crust....
Bauxite and alumina
E.L. Bray
2010, Mining Engineering (62) 40-41
The article reports on the global market performance of bauxite and alumina in 2009 and presents an outlook for their 2010 performance. There were only several U.S. states that could produce bauxite and bauxitic clays including Georgia, Arkansas, and Alabama. The prices for imported refractory-grade calcined bauxite ranged between 426...
Mineral resource of the month: salt
Dennis S. Kostick
2010, Earth (55) 27-27
The article presents information on various types of salt. Rock salt is either found from underground halite deposits or near the surface. Other types of salt include solar salt, salt brine, and vacuum pan salt. The different uses of salt are also given including its use as a flavor enhancer,...
Mineral resource of the month: iron ore
John Jorgenson
2010, Earth (55) 29-29
The article provides information on iron ore, including its use in steelmaking....
Mineral resource of the month: fluorspar
Water Resources Division, U.S. Geological Survey
2010, Earth (55) 28-29
The article features the industrial mineral fluorspar, used in the manufacture of fluorochemicals, aluminum and steel. It defines fluorspar as crude or beneficiated material, mined or milled for the non-metallic mineral fluorite or calcium fluoride. Applications of acid-grade fluorspar in the U.S. are presented, including production of hydrofluoric acid for...
Inference of lithologic distributions in an alluvial aquifer using airborne transient electromagnetic surveys
Jesse E. Dickinson, D. R. Pool, R.W. Groom, L.J. Davis
2010, Geophysics (75) WA149-WA161
An airborne transient electromagnetic (TEM) survey was completed in the Upper San Pedro Basin in southeastern Arizona to map resistivity distributions within the alluvial aquifer. This investigation evaluated the utility of 1D vertical resistivity models of the TEM data to infer lithologic distributions in an alluvial aquifer. Comparisons of the...
Strontium
M.A. Angulo
2010, Mining Engineering (62) 77-78
In 2009, U.S. apparent consumption of strontium (contained in celestite and manufactured strontium compounds) increased to 16 kt (17,600 st) from 10.6 kt (11,700 st) in 2008, an increase of 52 percent. This increase was attributed primarily to an increase in imported celestite. Gross weight of imports totaled 25.3 kt...
Exploration review
D.R. Wilburn, M.R. Bourget
2010, Mining Engineering (62) 39-52
This summary of international mineral exploration activities for the year 2009 draws upon information from industry sources, published literature and U.S. Geological Survey (USGS) specialists. The summary provides data on industry exploration budgets by region and mineral commodity, identifies significant mineral discoveries and areas of mineral exploration, discusses government programs...
Lithium
B.W. Jaskula
2010, Mining Engineering (62) 61-62
In 2009, lithium consumption in the United States was estimated to have been about 1.2 kt (1,300 st) of contained lithium, a 40-percent decrease from 2008. The United States was estimated to be the fourth largest consumer of lithium, and remained the leading importer of lithium carbonate and the leading...
Early invasion population structure of quagga mussel and associated benthic invertebrate community composition on soft sediment in a large reservoir
Marion E. Wittmann, Sudeep Chandra, Andrea Caires, Marianne Denton, Michael R. Rosen, Wai Hing Wong, Todd Teitjen, Kent Turner, Peggy Roefer, G. Chris Holdren
2010, Lake and Reservoir Management (26) 316-327
In 2007 an invasive dreissenid mussel species, Dreissena bugensis (quagga mussel), was discovered in Lake Mead reservoir (AZ–NV). Within 2 years, adult populations have spread throughout the lake and are not only colonizing hard substrates, but also establishing in soft sediments at depths ranging from 1 to >100 m. Dreissena...
Correction for the 17O interference in δ(13C) measurements when analyzing CO2 with stable isotope mass spectrometry
Willi A. Brand, Sergey S. Assonov, Tyler B. Coplen
2010, Pure and Applied Chemistry (82) 1719-1733
Measurements of δ(13C) determined on CO2 with an isotope-ratio mass spectrometer (IRMS) must be corrected for the amount of 17O in the CO2. For data consistency, this must be done using identical methods by different laboratories. This report aims at unifying data treatment for CO2 IRMS by proposing (i) a...
Water-resources data for the United States: water year 2010
Water Resources Division, U.S. Geological Survey
2010, Water Data Report 2010
Water resources data are published annually for use by engineers, scientists, managers, educators, and the general public. These archival products supplement direct access to current and historical water data provided by NWISWeb. Beginning with Water Year 2006, annual water data reports are available as individual electronic Site Data Sheets for...
Diel behavior of rearing fall Chinook salmon
Kenneth F. Tiffan, Tobias J. Kock, Joseph J. Skalicky
2010, Northwestern Naturalist (91) 342-345
In fisheries science, habitat use is often inferred when fish are sampled or observed in a particular location. Physical habitat is typically measured where fish are found, and thus deemed important to habitat use. Although less common, a more informative approach is to measure or observe fish behavior within given...
Prevalence of antibodies to type A influenza virus in wild avian species using two serologic assays
Justin D. Brown, M. Page Luttrell, Roy D. Berghaus, Whitney Kistler, Shamus P. Keeler, Andrea Howey, Benjamin Wilcox, Jeffrey S. Hall, Larry Niles, Amanda Dey, Gregory Knutsen, Kristen Fritz, David E. Stallknecht
2010, Journal of Wildlife Diseases (46) 896-911
Serologic testing to detect antibodies to avian influenza (AI) virus has been an underused tool for the study of these viruses in wild bird populations, which traditionally has relied on virus isolation and reverse transcriptase-polymerase chain reaction (RT-PCR). In a preliminary study, a recently developed commercial blocking enzyme-linked immunosorbent assay...
Understanding the potential dispersal of HPAI H5N1 virus by migratory wildfowl
Nicolas Gaidet, Julien Cappelle, John Y. Takekawa, Diann J. Prosser, Samuel A. Iverson, David C. Douglas, William M. Perry, Taej Mundkur, Scott H. Newman
2010, Argos Forum (71) 4-5
We analysed wildfowl movements between 2006-2009, including 228 birds from 19 species, part of a larger international programme (see Figure 1) coordinated by the Food and Agricultural Organisation (FAO) of the United Nations aimed at understanding if there are temporal or spatial relationships between HPAI H5N1 outbreaks and movements of...
Changes in the North American ferroalloys industry structure and trends in the industry during the past 20 years
J.R. Didaleusky, J.D. Jorgenson, L.A. Corathers, M.D. Fenton, P.H. Kuck, J.F. Papp, D.E. Polyak, Kim B. Shedd
2010, Conference Paper, Proceedings of the twelfth international ferroalloys congress: sustainable future: June 6 - 9, 2010, Helsinki, Finland
This analysis of changes in the North American (Canada, Mexico, and the United States) ferroalloys industry between 1987 and 2007 includes the locations and types of ferroalloy plants in North America and the changes in production, imports, exports, pricing, and the structure of ownership since 1987, which was just prior...
