Avian response to wildfire in interior Columbia basin shrubsteppe
S.L. Earnst, H.L. Newsome, W.L. LaFramboise, N. LaFramboise
2009, Condor (111) 370-376
Wildfire and conversion of sagebrush (Artemisia spp.) shrublands to cheatgrass (Bromus tectorum) grasslands is a serious threat to the shrubsteppe ecosystem, but few studies have documented wildfire's effects on birds with multiple years of pre- and post-fire data. Using data from avian point counts recorded 4 years before and 7...
Comparison of monkeypox viruses pathogenesis in mice by in vivo imaging
Jorge E. Osorio, Keith P. Iams, Carol U. Meteyer, Tonie E. Rocke
2009, PLoS ONE (4)
Monkeypox viruses (MPXV) cause human monkeypox, a zoonotic smallpox-like disease endemic to Africa, and are of worldwide public health and biodefense concern. Using viruses from the Congo (MPXV-2003-Congo-358) and West African (MPXV-2003-USA-044) clades, we constructed recombinant viruses that express the luciferase gene (MPXV-Congo/Luc+and MPXV-USA-Luc+) and compared their viral infection in...
Bank erosion along the dam-regulated lower Roanoke River, North Carolina
C.R. Hupp, E.R. Schenk, J.M. Richter, Robert K. Peet, Phil A. Townsend
2009, Special Paper of the Geological Society of America 97-108
Dam construction and its impact on downstream fluvial processes may substantially alter ambient bank stability and erosion. Three high dams (completed between 1953 and 1963) were built along the Piedmont portion of the Roanoke River, North Carolina; just downstream the lower part of the river flows across largely unconsolidated Coastal...
Geomorphology, stability and mobility of the Currituck slide
J. Locat, H. Lee, Uri S. ten Brink, D. Twichell, E. Geist, M. Sansoucy
2009, Marine Geology (264) 28-40
Over the last 100,000??years, the U.S. Atlantic continental margin has experienced various types of mass movements some of which are believed to have taken place at times of low sea level. At one of these times of low sea level a significant trigger caused a major submarine mass movement off...
Quantifying ecological, morphological, and genetic variation to delimit species in the coast horned lizard species complex (Phrynosoma)
A.D. Leache, M.S. Koo, C.L. Spencer, T.J. Papenfuss, Robert N. Fisher, J.A. McGuire
2009, Proceedings of the National Academy of Sciences of the United States of America (106) 12418-12423
Lineage separation and divergence form a temporally extended process whereby populations may diverge genetically, morphologically, or ecologically, and these contingent properties of species provide the operational criteria necessary for species delimitation.We inferred the historical process of lineage formation in the coast horned lizard (Phrynosoma coronatum) species complex by evaluating a...
Long-term pair bonds in the Laysan Duck
M.H. Reynolds, J.H. Breeden Jr., M.S. Vekasy, T.M. Ellis
2009, Wilson Journal of Ornithology (121) 187-190
We describe long-term pair bonds in the endangered Laysan Duck (Anas laysanensis), a dabbling duck endemic to the Hawaiian Archipelago. Individually marked birds were identified on Laysan Island between 1998 and 2006 (n = 613 marked adults). We recorded pair bonds while observing marked birds, and documented within and between...
Changes in West Nile virus seroprevalence and antibody titers among Wisconsin mesopredators 2003-2006
Douglas E. Docherty, Michael D. Samuel, Kristina F. Egstad, Kathryn M. Griffin, Cherrie A. Nolden, L. Karwal, S. Ip
2009, American Journal of Tropical Medicine and Hygiene (81) 177-179
After the 2001 occurrence of West Nile virus (WNV) in Wisconsin (WI), we collected sera, during 2003–2006, from south-central WI mesopredators. We tested these sera to determine WNV antibody prevalence and geometric mean antibody titer (GMAT). Four-fold higher antibody prevalence and 2-fold higher GMAT in 2003–2004 indicated greater exposure of...
TreeMAC: Localized TDMA MAC protocol for real-time high-data-rate sensor networks
W.-Z. Song, R. Huang, B. Shirazi, R. LaHusen
2009, Pervasive and Mobile Computing (5) 750-765
Earlier sensor network MAC protocols focus on energy conservation in low-duty cycle applications, while some recent applications involve real-time high-data-rate signals. This motivates us to design an innovative localized TDMA MAC protocol to achieve high throughput and low congestion in data collection sensor networks, besides energy conservation. TreeMAC divides a...
A tangled tale of two teal: Population history of the grey Anas gracilis and chestnut teal a. castanea of Australia
L. Joseph, G.J. Adcock, C. Linde, K.E. Omland, R. Heinsohn, Chesser R. Terry, D. Roshier
2009, Journal of Avian Biology (40) 430-439
Two Australian species of teal (Anseriformes: Anatidae: Anas), the grey teal Anas gracilis and the chestnut teal A. castanea, are remarkable for the zero or near-zero divergence recorded between them in earlier surveys of mitochondrial DNA (mtDNA) diversity. We confirmed this result through wider geographical and population sampling as well...
Propagation of the myxozoan parasite Myxobolus cerebralis by different geographic and genetic populations of Tubifex tubifex: An Oregon perspective
S.L. Hallett, H.V. Lorz, S.D. Atkinson, C. Rasmussen, L. Xue, J. L. Bartholomew
2009, Journal of Invertebrate Pathology (102) 57-68
Tubifex tubifex are obligate invertebrate hosts in the life cycle of Myxobolus cerebralis, the myxozoan parasite that causes whirling disease in salmonid fishes. This exotic parasite is established to varying degrees across Oregon's Columbia River system (Pacific Northwest, USA) and characteristics of local T. tubifex populations likely play a role...
Provenance of Holocene sediment on the Chukchi-Alaskan margin based on combined diffuse spectral reflectance and quantitative X-Ray Diffraction analysis
J.D. Ortiz, L. Polyak, J.M. Grebmeier, D. Darby, D. D. Eberl, S. Naidu, D. Nof
2009, Global and Planetary Change (68) 73-84
Sediment clay and silt mineral assemblages provide an excellent means of assessing the provenance of fine-grained Arctic sediment especially when a unique mineral assemblage can be tied to specific source areas. The diffuse spectral reflectance (DSR) first derivative measurements and quantitative X-Ray Diffraction (qXRD) on a high-resolution sediment core from...
A simplified water temperature model for the Colorado River below Glen Canyon Dam
S.A. Wright, C.R. Anderson, N. Voichick
2009, River Research and Applications (25) 675-686
Glen Canyon Dam, located on the Colorado River in northern Arizona, has affected the physical, biological and cultural resources of the river downstream in Grand Canyon. One of the impacts to the downstream physical environment that has important implications for the aquatic ecosystem is the transformation of the thermal regime...
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...
Sedimentation processes in a coral reef embayment: Hanalei Bay, Kauai
C. D. Storlazzi, M.E. Field, Michael H. Bothner, M.K. Presto, A.E. Draut
2009, Marine Geology (264) 140-151
Oceanographic measurements and sediment samples were collected during the summer of 2006 as part of a multi-year study of coastal circulation and the fate of terrigenous sediment on coral reefs in Hanalei Bay, Kauai. The goal of this study was to better understand sediment dynamics in a coral reef-lined embayment...
Relationships between nutritional condition of adult females and relative carrying capacity for rocky mountain Elk
J.R. Piasecke, Louis C. Bender
2009, Rangeland Ecology and Management (62) 145-152
Lactation can have significant costs to individual and population-level productivity because of the high energetic demands it places on dams. Because the difference in condition between lactating and dry Rocky Mountain elk (Cervus elaphus nelsoni) cows tends to disappear as nutritional quality rises, the magnitude of that difference could be...
Method development for analysis of urban dust using scanning electron microscopy with energy dispersive x-ray spectrometry to detect the possible presence of world trade center dust constituents
A.M. Bern, H.A. Lowers, G.P. Meeker, J.A. Rosati
2009, Environmental Science & Technology (43) 1449-1454
The collapse of the World Trade Center Towers on September 11, 2001, sent dust and debris across much of Manhattan and in the surrounding areas. Indoor and outdoor dust samples were collected and characterized by U.S. Geological Survey (USGS) scientists using scanning electron microscopy with energy-dispersive spectrometry (SEM/EDS). From this...
What constitutes a nesting attempt? Variation in criteria causes bias and hinders comparisons across studies
V. Garcia, C.J. Conway
2009, The Auk (126) 31-40
Because reliable estimates of nesting success are very important to avian studies, the defnition of a “successful nest” and the use of different analytical methods to estimate success have received much attention. By contrast, variation in the criteria used to determine whether an occupied site that did not produce offspring...
Polar organic compounds in pore waters of the Chesapeake Bay impact structure, Eyreville core hole: Character of the dissolved organic carbon and comparison with drilling fluids
Colleen E. Rostad, Ward E. Sanford
2009, Special Paper of the Geological Society of America (458) 891-903
Pore waters from the Chesapeake Bay impact structure cores recovered at Eyreville Farm, Northampton County, Virginia, were analyzed to characterize the dissolved organic carbon. After squeezing or centrifuging, a small volume of pore water, 100 μL, was taken for analysis by electrospray ionization–mass spectrometry. Pore-water samples were analyzed directly without...
U.S. Department of Energy's Regional Carbon Sequestration Partnership Program: Overview
J. Litynski, S. Plasynski, L. Spangler, R. Finley, E. Steadman, D. Ball, K.J. Nemeth, B. McPherson, L. Myer
2009, Conference Paper, Energy Procedia
The U.S. Department of Energy (DOE) has formed a nationwide network of seven regional partnerships to help determine the best approaches for capturing and permanently storing gases that can contribute to global climate change. The Regional Carbon Sequestration Partnerships (RCSPs) are tasked with determining the most suitable technologies, regulations, and...
Application of a rule-based model to estimate mercury exchange for three background biomes in the continental United States
J.S. Hartman, P.J. Weisberg, R. Pillai, J.A. Ericksen, T. Kuiken, S.E. Lindberg, H. Zhang, J. J. Rytuba, M.S. Gustin
2009, Environmental Science & Technology (43) 4989-4994
Ecosystems that have low mercury (Hg) concentrations (i.e., not enriched or impactedbygeologic or anthropogenic processes) cover most of the terrestrial surface area of the earth yet their role as a net source or sink for atmospheric Hg is uncertain. Here we use empirical data to develop a rule-based model implemented...
Effects of urbanization on stream water quality in the city of Atlanta, Georgia, USA
N.E. Peters
2009, Hydrological Processes (23) 2860-2878
A long-term stream water quality monitoring network was established in the city of Atlanta, Georgia during 2003 to assess baseline water quality conditions and the effects of urbanization on stream water quality. Routine hydrologically based manual stream sampling, including several concurrent manual point and equal width increment sampling, was conducted...
Low-btu gas in the US Midcontinent: A challenge for geologists and engineers
K. David Newell, Saibal Bhattacharya, M. Scott Sears
2009, Oil & Gas Journal (107) 35-44
Several low-btu gas plays can be defined by mapping gas quality by geological horizon in the Midcontinent. Some of the more inviting plays include Permian strata west of the Central Kansas uplift and on the eastern flank of Hugoton field and Mississippi chat and other pays that subcrop beneath (and...
Gene and antigen markers of Shiga-toxin producing E. coli from Michigan and Indiana river water: Occurrence and relation to recreational water quality criteria
J.W. Duris, S.K. Haack, L.R. Fogarty
2009, Journal of Environmental Quality (38) 1878-1886
The relation of bacterial pathogen occurrence to fecal indicator bacteria (FIB) concentrations used for recreational water quality criteria (RWQC) is poorly understood. This study determined the occurrence of Shiga-toxin producing Escherichia coli (STEC) markers and their relation to FIB concentrations in Michigan and Indiana river water. Using 67 fecal coliform (FC) bacteria...
Dietary response of sympatric deer to fire using stable isotope analysis of liver tissue
W. David Walter, T.J. Zimmerman, David M. Leslie Jr., J.A. Jenks
2009, Wildlife Biology in Practice (5) 128-135
Carbon (??13C) and nitrogen (??15N) isotopes in biological samples from large herbivores identify photosynthetic pathways (C3 vs. C4) of plants they consumed and can elucidate potential nutritional characteristics of dietary selection. Because large herbivores consume a diversity of forage types, ??13C and ??15N in their tissue can index ingested and...
Elastic wave speeds and moduli in polycrystalline ice Ih, si methane hydrate, and sll methane-ethane hydrate
M.B. Helgerud, W.F. Waite, S. H. Kirby, A. Nur
2009, Journal of Geophysical Research B: Solid Earth (114)
We used ultrasonic pulse transmission to measure compressional, P, and shear, S, wave speeds in laboratory-formed polycrystalline ice Ih, si methane hydrate, and sll methane-ethane hydrate. From the wave speed's linear dependence on temperature and pressure and from the sample's calculated density, we derived expressions for bulk, shear, and compressional...
