Relative abundance and species richness of cerambycid beetles in partial cut and uncut bottomland hardwood forests
P. Newell, S. King
2009, Canadian Journal of Forest Research (39) 2100-2108
Partial cutting techniques are increasingly advocated and used to create habitat for priority wildlife. However, partial cutting may or may not benefit species dependent on deadwood; harvesting can supplement coarse woody debris in the form of logging slash, but standing dead trees may be targeted for removal. We sampled cerambycid...
Characterizing canopy biochemistry from imaging spectroscopy and its application to ecosystem studies
R.F. Kokaly, Gregory P. Asner, S.V. Ollinger, M.E. Martin, C.A. Wessman
2009, Remote Sensing of Environment (113)
For two decades, remotely sensed data from imaging spectrometers have been used to estimate non-pigment biochemical constituents of vegetation, including water, nitrogen, cellulose, and lignin. This interest has been motivated by the important role that these substances play in physiological processes such as photosynthesis, their relationships with ecosystem processes such...
Modern U-Pb chronometry of meteorites: advancing to higher time resolution reveals new problems
Y. Amelin, J. Connelly, R. E. Zartman, J.-H. Chen, C. Gopel, L.A. Neymark
2009, Geochimica et Cosmochimica Acta (73) 5212-5223
In this paper, we evaluate the factors that influence the accuracy of lead (Pb)-isotopic ages of meteorites, and may possibly be responsible for inconsistencies between Pb-isotopic and extinct nuclide timescales of the early Solar System: instrumental mass fractionation and other possible analytical sources of error, presence of more than one...
Search without boundaries, using simple APls
Q. Tong
2009, Computers in Libraries (29) 26-30
[No abstract available]...
Monitoring of land subsidence and ground fissures in Xian, China 2005-2006: Mapped by sar Interferometry
C.Y. Zhao, Q. Zhang, X.-L. Ding, Z. Lu, C.S. Yang, X.M. Qi
2009, Environmental Geology (58) 1533-1540
The City of Xian, China, has been experiencing significant land subsidence and ground fissure activities since 1960s, which have brought various severe geohazards including damages to buildings, bridges and other facilities. Monitoring of land subsidence and ground fissure activities can provide useful information for assessing the extent of, and mitigating...
Pink shrimp as an indicator for restoration of everglades ecosystems
Joan A. Browder, M. B. Robblee
2009, Ecological Indicators (9)
The pink shrimp, Farfantepenaeus duorarum, familiar to most Floridians as either food or bait shrimp, is ubiquitous in South Florida coastal and offshore waters and is proposed as an indicator for assessing restoration of South Florida's southern estuaries: Florida Bay, Biscayne Bay, and the mangrove estuaries of the lower southwest...
Monitoring urban land cover change by updating the national land cover database impervious surface products
George Z. Xian, Collin G. Homer
2009, Conference Paper, 2009 Joint urban remote sensing event
The U.S. Geological Survey (USGS) National Land Cover Database (NLCD) 2001 is widely used as a baseline for national land cover and impervious conditions. To ensure timely and relevant data, it is important to update this base to a more recent time period. A prototype method was developed to update...
Joint spatiotemporal variability of global sea surface temperatures and global Palmer drought severity index values
S. Apipattanavis, G.J. McCabe, B. Rajagopalan, S. Gangopadhyay
2009, Journal of Climate (22) 6251-6267
Dominant modes of individual and joint variability in global sea surface temperatures (SST) and global Palmer drought severity index (PDSI) values for the twentieth century are identified through a multivariate frequency domain singular value decomposition. This analysis indicates that a secular trend and variability related to the El Niño–Southern Oscillation...
Reservoir uncertainty, Precambrian topography, and carbon sequestration in the Mt. Simon Sandstone, Illinois Basin
H.E. Leetaru, J.H. McBride
2009, Environmental Geosciences (16) 235-243
Sequestration sites are evaluated by studying the local geological structure and confirming the presence of both a reservoir facies and an impermeable seal not breached by significant faulting. The Cambrian Mt. Simon Sandstone is a blanket sandstone that underlies large parts of Midwest United States and is this region's most...
Effects of fire temperature on the physical and chemical characteristics of the ash from two plots of Cork oak (Quercus Suber)
X. Ubeda, P. Pereira, L. Outeiro, D.A. Martin
2009, Land Degradation and Development (20) 589-608
Cork oak, (Quercus suber) is widely distributed in the Mediterranean region, an area subject to frequent fires. The ash produced by burning can have impacts on the soil status and water resources that can differ according to the temperature reached during fire and the characteristics of the litter, defined as...
Habitat-specific breeder survival of Florida Scrub-Jays: Inferences from multistate models
D.R. Breininger, J.D. Nichols, G.M. Carter, D.M. Oddy
2009, Ecology (90) 3180-3189
Quantifying habitat-specific survival and changes in habitat quality within disturbance-prone habitats is critical for understanding population dynamics and variation in fitness, and for managing degraded ecosystems. We used 18 years of color-banding data and multistate capture-recapture models to test whether habitat quality within territories influences survival and detection probability of...
Analysis of dynamic thresholds for the normalized difference water index
Lei Ji, Li Zhang, Bruce K. Wylie
2009, Photogrammetric Engineering and Remote Sensing (75) 1307-1317
The normalized difference water index (NDWI) has been successfully used to delineate surface water features. However, two major problems have been often encountered: (a) NDWIs calculated from different band combinations [visible, nearinfrared, or shortwave-infrared (SWIR)] can generate different results, and (b) NDWI thresholds vary depending on the proportions of subpixel...
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...
Numerical simulations and observations of surface wave fields under an extreme tropical cyclone
Y. Fan, I. Ginis, T. Hara, C. W. Wright, E.J. Walsh
2009, Journal of Physical Oceanography (39) 2097-2116
The performance of the wave model WAVEWATCH III under a very strong, category 5, tropical cyclone wind forcing is investigated with different drag coefficient parameterizations and ocean current inputs. The model results are compared with field observations of the surface wave spectra from an airborne scanning radar altimeter, National Data...
Masticophis flagellum selects florida scrub habitat at multiple spatial scales
B.J. Halstead, H.R. Mushinsky, E.D. McCoy
2009, Herpetologica (65) 268-279
The use of space by individual animals strongly influences the spatial extent, abundance, and growth rates of their populations. We analyzed the spatial ecology and habitat selection of Masticophis flagellum (the coachwhip) at three different scales to determine which habitats are most important to this species. Home ranges and mean...
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...
Comparison of alternative representations of hydraulic-conductivity anisotropy in folded fractured-sedimentary rock: Modeling groundwater flow in the Shenandoah Valley (USA)
R. M. Yager, C.I. Voss, S. Southworth
2009, Hydrogeology Journal (17) 1111-1131
A numerical representation that explicitly represents the generalized three-dimensional anisotropy of folded fractured-sedimentary rocks in a groundwater model best reproduces the salient features of the flow system in the Shenandoah Valley, USA. This conclusion results from a comparison of four alternative representations of anisotropy in which the hydraulic-conductivity tensor...
Co-seismic ruptures of the 12 May 2008, Ms 8.0 Wenchuan earthquake, Sichuan: East-west crustal shortening on oblique, parallel thrusts along the eastern edge of Tibet
J. Liu-Zeng, Z. Zhang, L. Wen, P. Tapponnier, Jielun Sun, X. Xing, G. Hu, Q. Xu, L. Zeng, L. Ding, C. Ji, K.W. Hudnut, J. van der Woerd
2009, Earth and Planetary Science Letters (286) 355-370
The Ms 8.0, Wenchuan earthquake, which devastated the mountainous western rim of the Sichuan basin in central China, produced a surface rupture over 200??km-long with oblique thrust/dextral slip and maximum scarp heights of ~ 10??m. It thus ranks as one of the world's largest continental mega-thrust events in the last...
A comparison of complete mitochondrial genomes of silver carp hypophthalmichthys molitrix and bighead carp hypophthalmichthys nobilis: Implications for their taxonomic relationship and phylogeny
S.-F. Li, J.-W. Xu, Q.-L. Yang, C.H. Wang, Q. Chen, D.C. Chapman, G. Lu
2009, Journal of Fish Biology (74) 1787-1803
Based upon morphological characters, Silver carp Hypophthalmichthys molitrix and bighead carp Hypophthalmichthys nobilis (or Aristichthys nobilis) have been classified into either the same genus or two distinct genera. Consequently, the taxonomic relationship of the two species at the generic level remains equivocal. This issue is addressed by sequencing complete mitochondrial...
Uplift and magma intrusion at Long Valley caldera from InSAR and gravity measurements
Pietro Tizzani, Maurizio Battaglia, Giovanni Zeni, Simone Atzori, Paolo Berardino, Riccardo Lanari
2009, Geology (37) 63-66
The Long Valley caldera (California) formed ~760,000 yr ago following the massive eruption of the Bishop Tuff. Postcaldera volcanism in the Long Valley volcanic field includes lava domes as young as 650 yr. The recent geological unrest is characterized by uplift of the resurgent dome in the central section of...
THEMIS high-resolution digital terrain: Topographic and thermophysical mapping of Gusev Crater, Mars
G.E. Cushing, T.N. Titus, L.A. Soderblom, R. L. Kirk
2009, Journal of Geophysical Research E: Planets (114)
We discuss a new technique to generate high-resolution digital terrain models (DTMs) and to quantitatively derive and map slope-corrected thermophysical properties such as albedo, thermal inertia, and surface temperatures. This investigation is a continuation of work started by Kirk et al. (2005), who empirically deconvolved Thermal Emission Imaging System (THEMIS)...
Dynamics of national forests assessed using the Landsat record: Case studies in eastern United States
C. Huang, S.N. Goward, K. Schleeweis, N. Thomas, J. G. Masek, Z. Zhu
2009, Remote Sensing of Environment (113) 1430-1442
The national forests (NFs) in the United States are protected areas managed for multiple purposes, and therefore are subject to both natural and anthropogenic disturbances. Monitoring forest changes arising from such disturbances and the post-disturbance recovery processes is essential for assessing the conditions of the NFs and the effectiveness...
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...
The Neoglacial landscape and human history of Glacier Bay, Glacier Bay National Park and Preserve, southeast Alaska, USA
C. Connor, G. Streveler, A. Post, D. Monteith, W. Howell
2009, Holocene (19) 381-393
The Neoglacial landscape of the Huna Tlingit homeland in Glacier Bay is recreated through new interpretations of the lower Bay's fjordal geomorphology, late Quaternary geology and its ethnographic landscape. Geological interpretation is enhanced by 38 radiocarbon dates compiled from published and unpublished sources, as well as 15 newly dated samples....
Seasonal shifts in shelter and microhabitat use of drymarchon couperi (eastern indigo snake) in Georgia
N.L. Hyslop, R.J. Cooper, J.M. Meyers
2009, Copeia (2009) 458-464
Drymarchon couperi (Eastern Indigo Snake), a threatened species of the southeastern Coastal Plain of the United States, has experienced population declines because of extensive habitat loss and degradation across its range. In Georgia and northern Florida, the species is associated with longleaf pine habitats that support Gopherus polyphemus (Gopher Tortoise)...
