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Page 2537, results 63401 - 63425

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Publication Extents

Not all publications have extents, not all extents are completely accurate
Regeneration of native trees in the presence of invasive saltcedar in the Colorado River Delta, Mexico
Pamela L. Nagler, Osvel Hinojosa-Huerta, Edward P. Glenn, Jaqueline Garcia-Hernandez, Reggie Romo, Alfredo R. Huete, Stephen G. Nelson
2005, Conservation Biology (19) 1842-1852
Many riparian zones in the Sonoran Desert have been altered by elimination of the normal flood regime; such changes to the flow regime have contributed to the spread of saltcedar (Tamarix ramosissma Ledeb.), an exotic, salt-tolerant shrub. It has been proposed that reestablishment of a natural flow regime on these...
Organochlorine contaminants in the American White Pelican breeding at Pyramid Lake, Nevada
Stanley N. Wiemeyer, J.F. Miesner, Peter L. Tuttle, Edward C. Murphy
2005, Waterbirds (28) 95-101
Reproductive success of the American White Pelican (Pelecanus erythrorhynchos) was monitored at a breeding colony on Anaho Island, Pyramid Lake, Nevada in 1996. Eggs were collected in 1988 and 1996 and analyzed for organochlorine pesticides (OCs) and total polychlorinated biphenyls (PCBs). Muscle from adults found dead or debilitated and...
Evaluating MODIS data to estimate irrigated crop production in Afghanistan using a thermal-based ET fraction approach
Gabriel B. Senay, Michael Budde, J. Rowland, James P. Verdin
2005, Conference Paper, Global priorities in land remote sensing
Accurate crop performance monitoring and production estimation is critical for timely assessment of the food balance of several countries in the world. Recently, the Famine Early Warning System Network (FEWS NET) has been monitoring crop performance and to some extent relative production using satellite derived data and simulation models in...
Landsat 7 scan line corrector-off gap-filled product development
James C. Storey, Pasquale Scaramuzza, Gail L. Schmidt, Julia Barsi
2005, Conference Paper, Global priorities in land remote sensing
The Landsat 7 Enhanced Thematic Mapper Plus (ETM+) scan line corrector (SLC) failed on May 31, 2003, causing the scanning pattern to exhibit wedge-shaped scan-to-scan gaps. The ETM+ has continued to acquire data with the SLC powered off, leading to images that are missing approximately 22 percent of the normal...
Petrography, structure, age, and thermal history of granitic coastal plain basement in the Chesapeake Bay impact structure, USGS-NASA Langley core, Hampton, Virginia
J. Wright Horton, Jr., David S. Powars, Gregory Gohn
2005, Professional Paper 1688-B
The USGS-NASA Langley corehole at Hampton, Va., was drilled in 2000 and was the first corehole to reach coastal plain basement in the late Eocene Chesapeake Bay impact structure. The Langley core provided samples of granite that had been concealed by 626.3 meters (2,054.7 feet) of preimpact, synimpact, and postimpact sediments. The granite, here...
Studies of the Chesapeake Bay impact structure - Introduction and discussion
J. Wright Horton, Jr., David S. Powars, Gregory Gohn
2005, Professional Paper 1688-A
The late Eocene Chesapeake Bay impact structure on the Atlantic margin of Virginia is the largest known impact crater in the United States, and it may be the Earth's best preserved example of a large impact crater that formed on a predominantly siliciclastic continental shelf. The 85-kilometer-wide (53-milewide) crater also coincides with a region of...
Crystalline-rock ejecta and shocked minerals of the Chesapeake Bay impact structure, USGS-NASA Langley core, Hampton, Virginia, with supplemental constraints on the age of impact
J. Wright Horton, Jr., G. A. Izett
2005, Professional Paper 1688-E
The USGS-NASA Langley corehole at Hampton, Va., was drilled 2000 as the first in a series of new coreholes drilled in the late Eocene Chesapeake Bay impact structure to gain a comprehensive understanding of its three-dimensional character. This understanding is important for assessing ground-water resources in the region, as well as for...
Monitoring boreal forest leaf area index across a Siberian burn chronosequence: A MODIS validation study
X. Chen, Lee Vierling, D. Deering, A. Conley
2005, International Journal of Remote Sensing (26) 5433-5451
Landscapes containing differing amounts of ecological disturbance provide an excellent opportunity to validate and better understand the emerging Moderate Resolution Imaging Spectrometer (MODIS) vegetation products. Four sites, including 1‐year post‐fire coniferous, 13‐year post‐fire deciduous, 24‐year post‐fire deciduous, and >100 year old post‐fire coniferous forests, were selected to serve as a...
Individual-based modeling of ecological and evolutionary processes
Donald L. DeAngelis, Wolf M. Mooij
2005, Annual Review of Ecology, Evolution, and Systematics (36) 147-168
Individual-based models (IBMs) allow the explicit inclusion of individual variation in greater detail than do classical differential-equation and difference-equation models. Inclusion of such variation is important for continued progress in ecological and evolutionary theory. We provide a conceptual basis for IBMs by describing five major types of individual variation in...
Bird use of reforestation sites: Influence of location and vertical structure
Daniel J. Twedt, Robert Cooper
2005, Technical Note 190-34
In the Lower Mississippi Valley, more than 300,000 acres of agricultural land have been reforested in the last 10 years. Planning decisions on how and where to restore forest are complex and usually reflect landowner objectives. However, initial planning decisions may have a large influence on the value of restored...
Stratigraphy and sedimentology of a dry to wet eolian depositional system, Burns formation, Meridiani Planum, Mars
J. P. Grotzinger, R. E. Arvidson, J. F. Bell, W. Calvin, B. C. Clark, D.A. Fike, M. Golombek, R. Greeley, A. Haldemann, Kenneth E. Herkenhoff, B. L. Jolliff, A. H. Knoll, M. Malin, S. M. McLennan, T. Parker, Laurence A. Soderblom, J. N. Sohl-Dickstein, S. W. Squyres, N.J. Tosca, W.A. Watters
2005, Earth and Planetary Science Letters (240) 11-72
Outcrop exposures of sedimentary rocks at the Opportunity landing site (Meridiani Planum) form a set of genetically related strata defined here informally as the Burns formation. This formation can be subdivided into lower, middle, and upper units which, respectively, represent eolian dune, eolian sand sheet, and mixed eolian sand sheet...
Perceptions of earthquake and tsunami issues in U.S. Pacific Northwest port and harbor communities
Nathan J. Wood, James W. Good
2005, International Journal of Mass Emergencies and Disasters (23) 103-138
Although there is considerable energy focused on assessing natural hazards associated with earthquakes and tsunamis in the U.S. Pacific Northwest, little has been done to understand societal vulnerability to these hazards. Part of understanding societal vulnerability includes assessing the perceptions and priorities of public sector individuals with traditional emergency management...
Uncertainty in the Great Lakes water balance
Brian P. Neff, J.R. Nicholas
2005, Scientific Investigations Report 2004-5100
This report describes the Great Lakes hydrologic system and methods used to quantify individual components of the water balance. Potential sources of uncertainty are identified and, where appropriate, alternate or additional data, models, and estimation methods suitable for reducing uncertainties are discussed. Finally, approximate uncertainties of all components are identified,...
Streamflow, water-quality, and biological data for three tributaries to Lake Houston near Houston, Texas, 2002-04
Jeffery W. East, Debra A. Sneck-Fahrer
2005, Data Series 142
During 2002-04 the U.S. Geological Survey, in cooperation with the Houston-Galveston Area Council and the Texas Commission on Environmental Quality, conducted a systematic monitoring study on Lake Creek, Peach Creek, and Caney Creek near Houston, Texas, to assess the current water-quality and biological conditions in the three tributaries to Lake...