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Page 1985, results 49601 - 49625

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Producing fired bricks using coal slag from a gasification plant in indiana
L.-M. Chen, I.-M. Chou, Sheng-Fu J. Chou, J.W. Stucki
2009, Conference Paper, 3rd World of Coal Ash, WOCA Conference - Proceedings
Integrated gasification combined cycle (IGCC) is a promising power generation technology which increases the efficiency of coal-to-power conversion and enhances carbon dioxide concentration in exhaust emissions for better greenhouse gas capture. Two major byproducts from IGCC plants are bottom slag and sulfur. The sulfur can be processed into commercially viable...
Nesting ecology of Greater Sandhill Cranes (Grus canadensis tabida) in riparian and palustrine wetlands of eastern Idaho
D.B. McWethy, J. E. Austin
2009, Waterbirds (32) 106-115
Little information exists on breeding Greater Sandhill Cranes (Grus canadensis tabida) in riparian wetlands of the Intermountain West. We examined the nesting ecology of Sandhill Cranes associated with riparian and palustrine wetlands in the Henry's Fork Watershed in eastern Idaho in 2003. We located 36 active crane nests, 19 in...
Sediment accumulation on the Southern California Bight continental margin during the twentieth century
C. R. Alexander, H.J. Lee
2009, Special Paper of the Geological Society of America 69-87
Sediment discharged into the portion of the Southern California Bight extending from Santa Barbara to Dana Point enters a complex system of semi-isolated coastal cells, narrow continental shelves, submarine canyons, and offshore basins. On both the Santa Monica and San Pedro margins, 210Pb accumulation rates decrease in an offshore direction...
Post-fledging movements of juvenile Common Mergansers (mergus merganser) in Alaska as inferred by satellite telemetry
John M. Pearce, Margaret R. Petersen
2009, Waterbirds (32) 133-137
We implanted satellite transmitters into eight juvenile Common Mergansers to investigate post-fledging movements from their natal river in southcentral Alaska. Subsequently, they moved widely throughout portions of western and southcentral Alaska up to 750 km from their natal areas during fall and winter months. Transmitters of two birds (one male...
Lipid reserves of Lesser Scaup (Aythya affinis) migrating across a large landscape are consistent with the "Spring Condition" hypothesis
M.J. Anteau, A. D. Afton
2009, The Auk (126) 873-883
The “spring condition” hypothesis (SCH) states that nutrition during spring migration affects survival, reproductive success, and, ultimately, population size of migratory birds. The North American population of Lesser Scaup (Aythya affinis) has experienced a marked decline, apparently because of poor recruitment. An important prediction of the SCH is that female...
Using U.S. Geological Survey data in material flow analysis: An introduction
S.F. Sibley
2009, Journal of Industrial Ecology (13) 670-673
A few sources of basic data on worldwide raw materials production and consumption exist that are independently developed and freely available to the public. This column is an introduction to the types of information available from the U.S. Geological Survey (USGS), and explains how the data are assembled. The kind...
Territoriality of feral pigs in a highly persecuted population on Fort Benning, Georgia
B.D. Sparklin, M.S. Mitchell, L.B. Hanson, D.B. Jolley, S.S. Ditchkoff
2009, Journal of Wildlife Management (73) 497-502
We examined home range behavior of female feral pigs (Sus scrofa) in a heavily hunted population on Fort Benning Military Reservation in west-central Georgia, USA. We used Global Positioning System location data from 24 individuals representing 18 sounders (i.e., F social groups) combined with markrecapture and camera-trap data to evaluate...
Prevalence of West Nile virus in migratory birds during spring and fall migration
Robert J. Dusek, R. G. McLean, L.D. Kramer, S. R. Ubico, A.P. Dupuis II, G.D. Ebel, S.C. Guptill
2009, American Journal of Tropical Medicine and Hygiene (81) 1151-1158
To investigate the role of migratory birds in the dissemination of West Nile virus (WNV), we measured the prevalence of infectious WNV and specific WNV neutralizing antibodies in birds, principally Passeriformes, during spring and fall migrations in the Atlantic and Mississippi flyways from 2001-2003. Blood samples were obtained from 13,403...
Microbial abundance in the deep subsurface of the Chesapeake Bay impact crater: Relationship to lithology and impact processes
Charles S. Cockell, Aaron L. Gronstal, Mary A. Voytek, Julie D. Kirshtein, Kai Finster, Ward E. Sanford, Mihaela Glamoclija, Gregroy S. Gohn, David S. Powars, J. Wright Horton Jr.
2009, GSA Special Papers (458) 941-950
Asteroid and comet impact events are known to cause profound disruption to surface ecosystems. The aseptic collection of samples throughout a 1.76-km-deep set of cores recovered from the deep subsurface of the Chesapeake Bay impact structure has allowed the study of the subsurface biosphere in a region disrupted by an...
Advancing techniques to constrain the geometry of the seismic rupture plane on subduction interfaces a priori: Higher-order functional fits
G.P. Hayes, D.J. Wald, K. Keranen
2009, Geochemistry, Geophysics, Geosystems (10)
Ongoing developments in earthquake source inversions incorporate nonplanar fault geometries as inputs to the inversion process, improving previous approaches that relied solely on planar fault surfaces. This evolution motivates advancing the existing framework for constraining fault geometry, particularly in subduction zones where plate boundary surfaces that host highly hazardous earthquakes...
Migratory decisions in birds: Extent of genetic versus environmental control
M.S. Ogonowski, C.J. Conway
2009, Oecologia (161) 199-207
Migration is one of the most spectacular of animal behaviors and is prevalent across a broad array of taxa. In birds, we know much about the physiological basis of how birds migrate, but less about the relative contribution of genetic versus environmental factors in controlling migratory tendency. To evaluate the...
Geomorphic applications of stream-gage information
K. E. Juracek, F. A. Fitzpatrick
2009, River Research and Applications (25) 329-347
In the United States, several thousand stream gages provide what typically is the only source of continuous, long-term streamflow and channel-geometry information for the locations being monitored. In this paper, the geomorphic content of stream-gage information, previous and potential applications of stream-gage information in fluvial geomorphic research and various possible...
The Mauna Loa carbon dioxide record: lessons for long-term Earth observations
Eric T. Sundquist, Ralph F. Keeling
2009, Book chapter, Carbon Sequestration and Its Role in the Global Carbon Cycle
The Mauna Loa carbon dioxide record is an iconic symbol of the human capacity to alter the planet. Yet this record would not have been possible without the remarkable work of one man, Charles David Keeling. We describe three emergent themes that characterized his work: (1) his desire to study...
Timber harvest change in the Little North Santiam River Basin, Oregon, 1995 to 2009
Steven Sobieszczyk
2009, Report
Using available aerial photos from approximately a 15-year period, changes in timber harvest were mapped in the Little North Santiam River Basin, Oregon. Timber harvest plots as seen on digital orthophotos from 1995, 2000, 2005, and 2009 were digitized and attributed based on harvest type or purpose: clearcut, thinning, or...
Warmwater fish in small standing waters
Kevin L. Pope, Robert M. Neumann, Scott D. Bryan
2009, Book chapter, Standard methods for sampling North American freshwater fishes
This chapter describes standardized sampling techniques for routine monitoring and population assessment of warmwater sport and prey fishes in small standing water bodies. Although water temperature regulates growth, survival, and reproduction of fishes, there are no specific criteria that define a warmwater fish community. Dodds (2002) noted that...
Geospatial Data Used in Water-Level and Land-Subsidence Studies in the Mojave River and Morongo Groundwater Basins for 2008
Carolyn Glockhoff, Christina L. Stamos
2009, Report
During 2008, the U.S. Geological Survey and other agencies made approximately 2,500 water-level measurements in the Mojave River and Morongo groundwater basins. These data document recent conditions and, when compared with previous data, changes in groundwater levels. A water-level contour map was drawn using data from about 700 wells, providing...
Preface
Brian J. McPherson, Eric T. Sundquist
2009, Book chapter, Carbon sequestration and Its role in the global carbon cycle
Carbon sequestration has emerged as an important option in policies to mitigate the increasing atmospheric concentrations of anthropogenic carbon dioxide (CO2). Significant quantities of anthropogenic CO2 are sequestered by natural carbon uptake in plants, soils, and the oceans. These uptake processes are objects of intense study by biogeochemists, ecologists, and...
The increasing wildfire and post-fire debris-flow threat in western USA, and implications for consequences of climate change
Susan H. Cannon, Jerry DeGraff
2009, Book chapter, This is a chapter in the book <i>Landslides � Disaster Risk Reduction</i>
In southern California and the intermountain west of the USA, debris flows generated from recently-burned basins pose significant hazards. Increases in the frequency and size of wildfires throughout the western USA can be attributed to increases in the number of fire ignitions, fire suppression practices, and climatic influences. Increased urbanization...
An introduction to global carbon cycle management
Eric T. Sundquist, Katherine V. Ackerman, Lauren Parker, Deborah N. Huntzinger
2009, Book chapter, Carbon Sequestration and Its Role in the Global Carbon Cycle
Past and current human activities have fundamentally altered the global carbon cycle. Potential future efforts to control atmospheric CO2 will also involve significant changes in the global carbon cycle. Carbon cycle scientists and engineers now face not only the difficulties of recording and understanding past and present changes but also...
Comparative status and assessment of Limulus polyphemus with emphasis on the New England and Delaware Bay populations
David Smith, Michael J. Millard, Ruth H. Carmichael
2009, Book chapter, Biology and Conservation of Horseshoe Crabs
Increases in harvest of the American horseshoe crab (Limulus polyphemus) during the 1990s, particularly for whelk bait, coupled with decreases in species that depend on their eggs has reduced horseshoe crab abundance, threatened their ecological relationships, and dictated precautionary management of the horseshoe crab resource. Accordingly, population assessments and monitoring...
Preparing a population for an earthquake like Chi-Chi: The Great Southern California ShakeOut
Lucile M. Jones, The ShakeOut Team
2009, Conference Paper, Improving earthquake mitigation through innovations and applications in seismic science, engineering, communication, and response, Proceedings of a U.S.-Iran seismic workshop
The Great Southern California ShakeOut was a week of special events featuring the largest earthquake drill in United States history. On November 13, 2008, over 5 million southern Californians pretended that a magnitude-7.8 earthquake had occurred and practiced actions that could reduce its impact on their lives. The primary message...
Mineral resource of the month: gallium
Brian W. Jaskula
2009, Earth (54) 29-29
The metal element gallium occurs in very small concentrations in rocks and ores of other metals — native gallium is not known. As society gets more and more high-tech, gallium becomes more useful. Gallium is one of only five metals that are liquid at or close to room temperature. It...
Mineral resource of the month: cobalt
Kim B. Shedd
2009, Earth (54) 31-31
Cobalt is a metal used in numerous commercial, industrial and military applications. On a global basis, the leading use of cobalt is in rechargeable lithium-ion, nickel-cadmium and nickel-metal hydride battery electrodes. Cobalt use has grown rapidly since the early 1990s, with the development of new battery technologies and an increase...