Remote monitoring of tamarisk defoliation and evapotranspiration following saltcedar leaf beetle attack
P.E. Dennison, P.L. Nagler, K. R. Hultine, E. P. Glenn, J.R. Ehleringer
2009, Remote Sensing of Environment (113) 1462-1472
Tamarisk (Tamarix spp.) has invaded riparian ecosystems throughout the Western United States, including significant portions of riparian ecosystems within U.S. National Parks and Monuments. Recently, the saltcedar leaf beetle (Diorhabda elongata) was released as a tamarisk biocontrol agent. Although initial releases have been monitored, no comprehensive program is currently in...
Web services in the U.S. geological survey streamstats web application
J. D. Guthrie, C. Dartiguenave, Kernell G. Ries III
2009, Conference Paper, Proceedings of the International Conference on Advanced Geographic Information Systems and Web Services, GEOWS 2009
StreamStats is a U.S. Geological Survey Web-based GIS application developed as a tool for waterresources planning and management, engineering design, and other applications. StreamStats' primary functionality allows users to obtain drainage-basin boundaries, basin characteristics, and streamflow statistics for gaged and ungaged sites. Recently, Web services have been developed that provide...
Wildland-urban interface maps vary with purpose and context
S. I. Stewart, B. Wilmer, R. B. Hammer, G. H. Aplet, T. J. Hawbaker, C. Miller, V. C. Radeloff
2009, Journal of Forestry (107) 78-83
Maps of the wildland-urban interface (WUI) are both policy tools and powerful visual images. Although the growing number of WUI maps serve similar purposes, this article indicates that WUI maps derived from the same data sets can differ in important ways related to their original intended application. We discuss the...
Sedimentary basin effects in Seattle, Washington: Ground-motion observations and 3D simulations
Arthur Frankel, William Stephenson, David Carver
2009, Bulletin of the Seismological Society of America (99) 1579-1611
Seismograms of local earthquakes recorded in Seattle exhibit surface waves in the Seattle basin and basin-edge focusing of S waves. Spectral ratios of Swaves and later arrivals at 1 Hz for stiff-soil sites in the Seattle basin show a dependence on the direction to the earthquake, with earthquakes to the...
Hurricane Wilma's impact on overall soil elevation and zones within the soil profile in a mangrove forest
K.R.T. Whelan, T. J. Smith III, G.H. Anderson, M.L. Ouellette
2009, Wetlands (29) 16-23
Soil elevation affects tidal inundation period, inundation frequency, and overall hydroperiod, all of which are important ecological factors affecting species recruitment, composition, and survival in wetlands. Hurricanes can dramatically affect a site's soil elevation. We assessed the impact of Hurricane Wilma (2005) on soil elevation at a mangrove forest location...
The stable carbon isotope biogeochemistry of acetate and other dissolved carbon species in deep subseafloor sediments at the northern Cascadia Margin
Verena B. Heuer, John W. Pohlman, Marta E. Torres, Marcus Elvert, Kai-Uwe Hinrichs
2009, Geochimica et Cosmochimica Acta (73) 3323-3336
Ocean drilling has revealed the existence of vast microbial populations in the deep subseafloor, but to date little is known about their metabolic activities. To better understand the biogeochemical processes in the deep biosphere, we investigate the stable carbon isotope chemistry of acetate and other...
Criticisms biologically unwarranted and analytically irrelevant: Reply to Rominger et al.
Louis C. Bender, M.E. Weisenberger
2009, Journal of Wildlife Management (73) 806-810
The criticisms of Rominger et al. (2008) of our retrospective analysis of desert bighorn sheep (DBS; Ovis canadensis mexicana) dynamics in the San Andres Mountains of south-central New Mexico, USA, contained many biological errors and analytical oversights. Herein, we show that Rominger et al. (2008) 1) overstated both magnitude and...
Rapid incision of the Colorado River in Glen Canyon - insights from channel profiles, local incision rates, and modeling of lithologic controls
K. L. Cook, K.X. Whipple, A.M. Heimsath, Thomas C. Hanks
2009, Earth Surface Processes and Landforms (34) 994-1010
The Colorado River system in southern Utah and northern Arizona is continuing to adjust to the baselevel fall responsible for the carving of the Grand Canyon. Estimates of bedrock incision rates in this area vary widely, hinting at the transient state of the Colorado and its tributaries. In conjunction with...
Beneath the veil: Plant growth form influences the strength of species richness-productivity relationships in forests
B. Oberle, J.B. Grace, J.M. Chase
2009, Global Ecology and Biogeography (18) 416-425
Aim: Species richness has been observed to increase with productivity at large spatial scales, though the strength of this relationship varies among functional groups. In forests, canopy trees shade understorey plants, and for this reason we hypothesize that species richness of canopy trees will depend on macroclimate, while species richness...
The contemporary cement cycle of the United States
A. Kapur, H. G. Van Oss, G. Keoleian, S.E. Kesler, A. Kendall
2009, Journal of Material Cycles and Waste Management (11) 155-165
A country-level stock and flow model for cement, an important construction material, was developed based on a material flow analysis framework. Using this model, the contemporary cement cycle of the United States was constructed by analyzing production, import, and export data for different stages of the cement cycle. The United...
Hierarchical spatial genetic structure of Common Eiders (Somateria mollissima) breeding along a migratory corridor
Sarah A. Sonsthagen, Sandra L. Talbot, Richard B. Lanctot, Kim T. Scribner, Kevin G. McCracken
2009, The Auk (126) 744-754
Documentation of spatial genetic discordance among breeding populations of Arctic-nesting avian species is important, because anthropogenic change is altering environmental linkages at micro- and macrogeographic scales. We estimated levels of population subdivision within Pacific Common Eiders (Somateria mollissima v-nigrum) breeding on 12 barrier islands in the western...
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...
Internal tidal currents in the Gaoping (Kaoping) Submarine Canyon
I.-H. Lee, Y. #NAME? Wang, J.T. Liu, W.-S. Chuang, J. Xu
2009, Journal of Marine Systems (76) 397-404
Data from five separate field experiments during 2000-2006 were used to study the internal tidal flow patterns in the Gaoping (formerly spelled Kaoping) Submarine Canyon. The internal tides are large with maximum interface displacements of about 200??m and maximum velocities of over 100cm/s. They are characterized by a first-mode velocity...
Extraction of lidar-based dune-crest elevations for use in examining the vulnerability of beaches to inundation during hurricanes
H.F. Stockdon, K.S. Doran, A. H. Sallenger Jr.
2009, Journal of Coastal Research 59-65
The morphology of coastal sand dunes plays an important role in determining how a beach will respond to a hurricane. Accurate measurements of dune height and position are essential for assessing the vulnerability of beaches to extreme coastal change during future landfalls. Lidar topographic surveys provide rapid, accurate, high-resolution datasets...
Size distribution of submarine landslides along the U.S. Atlantic margin
J.D. Chaytor, Uri S. ten Brink, A.R. Solow, B.D. Andrews
2009, Marine Geology (264) 16-27
Assessment of the probability for destructive landslide-generated tsunamis depends on the knowledge of the number, size, and frequency of large submarine landslides. This paper investigates the size distribution of submarine landslides along the U.S. Atlantic continental slope and rise using the size of the landslide source regions (landslide failure scars)....
Evaluating the validity of using unverified indices of body condition
J.L. Schamber, Daniel Esler, Paul L. Flint
2009, Journal of Avian Biology (40) 49-56
Condition indices are commonly used in an attempt to link body condition of birds to ecological variables of interest, including demographic attributes such as survival and reproduction. Most indices are based on body mass adjusted for structural body size, calculated as simple ratios or residuals from regressions. However, condition indices...
A multiscale analysis of coral reef topographic complexity using lidar-derived bathymetry
D.G. Zawada, J. C. Brock
2009, Journal of Coastal Research 6-15
Coral reefs represent one of the most irregular substrates in the marine environment. This roughness or topographic complexity is an important structural characteristic of reef habitats that affects a number of ecological and environmental attributes, including species diversity and water circulation. Little is known about the range of topographic complexity...
Spatial habitat use patterns of sea otters in coastal washington
K.L. Laidre, R.J. Jameson, E. Gurarie, S.J. Jeffries, H. Allen
2009, Journal of Mammalogy (90) 906-917
Sea otter (Enhydra lutris kenyoni) movements, home range, and activity budgets were described from data collected during very-high-frequency radiotelemetry studies of 75 individuals on the outer coast of Washington State between 1992 and 1999. Sea otters were located at least once per week from 22 accessible sites along the coast....
Mesohaline submerged aquatic vegetation survey along the U.S. gulf of Mexico coast, 2001 and 2002: A salinity gradient approach
J.H. Merino, J. Carter, S.L. Merino
2009, Gulf of Mexico Science (27) 9-20
Distribution of marine submerged aquatic vegetation (SAV; i.e., seagrass) in the northern Gulf of Mexico coast has been documented, but there are nonmarine submersed or SAV species occurring in estuarine salinities that have not been extensively reported. We sampled 276 SAV beds along the gulf coast in Florida, Alabama, Mississippi,...
Providing public standardized data access function: Lessons learned from accessing USGS Landsat archive
X. Cheng, Y. Bai, L. Di, D. Nebert
2009, Conference Paper, 2009 17th International Conference on Geoinformatics, Geoinformatics 2009
The geospatial community is experiencing a shift from having data locally to sharing them over the Web. However, not all the data accessing systems are built in compliance with open geospatial standards and thus are weak in terms of interoperability. The USGS Landsat data are now available through free electronic...
Modeling misidentification errors in capture-recapture studies using photographic identification of evolving marks
J. Yoshizaki, K. H. Pollock, C. Brownie, R.A. Webster
2009, Ecology (90) 3-9
Misidentification of animals is potentially important when naturally existing features (natural tags) are used to identify individual animals in a capture-recapture study. Photographic identification (photoID) typically uses photographic images of animals' naturally existing features as tags (photographic tags) and is subject to two main causes of identification errors: those related...
Unraveling the stratigraphy of the Oriskany Sandstone: A necessity in assessing its site-specific carbon sequestration potential
J. Kostelnik, K.M. Carter
2009, Environmental Geosciences (16) 187-200
The widespread distribution, favorable reservoir characteristics, and depth make the Lower Devonian Oriskany Sandstone a viable sequestration target in the Appalachian Basin. The Oriskany Sandstone is thickest in the structurally complex Ridge and Valley Province, thins toward the northern and western basin margins, and is even absent in other parts...
Demography and genetic structure of a recovering grizzly bear population
K.C. Kendall, J.B. Stetz, J. Boulanger, A.C. Macleod, David Paetkau, Gary C. White
2009, Journal of Wildlife Management (73) 3-17
Grizzly bears (brown bears; Ursus arctos) are imperiled in the southern extent of their range worldwide. The threatened population in northwestern Montana, USA, has been managed for recovery since 1975; yet, no rigorous data were available to monitor program success. We used data from a large noninvasive genetic sampling effort...
Cataloging the 1811-1812 New Madrid, central U.S., earthquake sequence
S. E. Hough
2009, Seismological Research Letters (80) 1045-1053
The three principal New Madrid, central U.S., mainshocks of 1811-1812 were followed by extensive aftershock sequences that included numerous felt events. Although no instrumental data are available for the sequence, historical accounts provide information that can be used to estimate magnitudes and locations for the large aftershocks as well as...
Characterization of Mars' seasonal caps using neutron spectroscopy
T.H. Prettyman, W. C. Feldman, T.N. Titus
2009, Journal of Geophysical Research E: Planets (114)
Mars' seasonal caps are characterized during Mars years 26 and 27 (April 2002 to January 2006) using data acquired by the 2001 Mars Odyssey Neutron Spectrometer. Time-dependent maps of the column abundance of seasonal CO 2 surface ice poleward of 60?? latitude in both hemispheres are determined from spatially deconvolved,...
