Interleukin-6 and tumor necrosis factor-alpha values in elk neonates
S. M. Barber-Meyer, C. R. Johnson, M.P. Murtaugh, L.D. Mech, P.J. White
2007, Journal of Mammalogy (88) 421-426
Serological indicators of general condition would be helpful for monitoring or assessing ungulate wildlife. Toward that end, we report the 1st reference values for 2 cytokines, interleukin-6 (IL-6) and tumor necrosis factor-alpha (TNF-??), in neonatal elk (Cervus elaphus). We obtained blood samples from 140 calves ??? 6 days old in...
Natural calcium isotonic composition of urine as a marker of bone mineral balance
J. Skulan, T. Bullen, A.D. Anbar, J.E. Puzas, L. Shackelford, A. LeBlanc, S. M. Smith
2007, Clinical Chemistry (53) 1155-1158
Background: We investigated whether changes in the natural isotopic composition of calcium in human urine track changes in net bone mineral balance, as predicted by a model of calcium isotopic behavior in vertebrates. If so, isotopic analysis of natural urine or blood calcium could be used to monitor short-term changes...
Coastal-change impacts during hurricane katrina: an overview
Asbury Sallenger, C. Wayne Wright, Jeff Lillycrop
2007, Conference Paper, Coastal Sediments '07 - Proceedings of 6th International Symposium on Coastal Engineering and Science of Coastal Sediment Processes
As part of an ongoing cooperative effort between USGS, NASA and USACE, the barrier islands within the right-front quadrant of Hurricane Katrina were surveyed with airborne lidar both before and after landfall. Dauphin Island, AL was located the farthest from landfall and wave runup intermittently overtopped its central and western...
Origin of halite brine in the Onondaga Trough near Syracuse, New York State, USA: Modeling geochemistry and variable-density flow
Richard M. Yager, William M. Kappel, Niel Plummer
2007, Hydrogeology Journal (15) 1321-1339
Halite brine (saturation ranging from 45 to 80%) lies within glacial sediments that fill the Onondaga Trough, a bedrock valley deepened by Pleistocene glaciation near Syracuse, New York State, USA. The most concentrated brine occupies the northern end of the trough, about 10 km downgradient of the northern limit of...
Ammonia causes decreased brain monoamines in fathead minnows (Pimephales promelas)
Patrick J. Ronan, Mark P. Gaikowski, Steven J. Hamilton, Kevin J. Buhl, Cliff H. Summers
2007, Brain Research (1147) 184-191
Hyperammonemia, arising from variety of disorders, leads to severe neurological dysfunction. The mechanisms of ammonia toxicity in brain are not completely understood. This study investigated the effects of ammonia on monoaminergic systems in brains of fathead minnows (Pimephales promelas). Fish serve as a good model system to investigate hyperammonemic effects...
The impact of metabolic state on Cd adsorption onto bacterial cells
K.J. Johnson, D.A. Ams, A.N. Wedel, J.E.S. Szymanowski, D.L. Weber, M.A. Schneegurt, J.B. Fein
2007, Geobiology (5) 211-218
This study examines the effect of bacterial metabolism on the adsorption of Cd onto Gram-positive and Gram-negative bacterial cells. Metabolically active Gram-positive cells adsorbed significantly less Cd than non-metabolizing cells. Gram-negative cells, however, showed no systematic difference in Cd adsorption between metabolizing and non-metabolizing cells....
Estimating locations and total magnetization vectors of compact magnetic sources from scalar, vector, or tensor magnetic measurements through combined Helbig and Euler analysis
J. D. Phillips, M.N. Nabighian, D.V. Smith, Y. Li
2007, Conference Paper, SEG Technical Program Expanded Abstracts
The Helbig method for estimating total magnetization directions of compact sources from magnetic vector components is extended so that tensor magnetic gradient components can be used instead. Depths of the compact sources can be estimated using the Euler equation, and their dipole moment magnitudes can be estimated using a least...
40Ar/39Ar ages of the AD 79 eruption of Vesuvius, Italy
Marvin A. Lanphere, Duane E. Champion, Leone Melluso, Vincenzo Morra, Annamaria Perrotta, Claudio Scarpati, Dario Tedesco, Andrew T. Calvert
2007, Bulletin of Volcanology (69) 259-263
The Italian volcano, Vesuvius, erupted explosively in AD 79. Sanidine from pumice collected at Casti Amanti in Pompeii and Villa Poppea in Oplontis yielded a weighted-mean 40Ar/39Ar age of 1925±66 years in 2004 (1σ uncertainty) from incremental-heating experiments of eight aliquants of sanidine. This is the calendar age of the eruption....
Demographic differences of black-capped vireos in 2 habitat types in central Texas
L.A. Noa, D.H. Hirth, T.M. Donovan, D. Cimprich
2007, Journal of Wildlife Management (71) 1042-1049
To understand the effects of habitat selection, we analyzed differences in abundance, age structure, and nesting success of black-capped vireos (Vireo atricapilla) in 2 early successional habitat types found on Fort Hood, a 87,890-ha Military Reservation in central Texas, USA. These habitats were 1) large areas of continuously shrubby vegetation...
Geohydrologic assessment of fractured crystalline bedrock on the southern part of Manhattan, New York, through the use of advanced borehole geophysical methods
F. Stumm, A. Chu, P. K. Joesten, J.W. Lane Jr.
2007, Journal of Geophysics and Engineering (4) 245-252
Advanced borehole-geophysical methods were used to assess the geohydrology of fractured crystalline bedrock in 31 of 64 boreholes on the southern part of Manhattan Island, NY in preparation of the construction of a new water tunnel. The study area is located in a highly urbanized part of New York City....
Using a coupled eco-hydrodynamic model to predict habitat for target species following dam removal
C.A. Tomsic, T.C. Granata, R.P. Murphy, C.J. Livchak
2007, Ecological Engineering (30) 215-230
A habitat suitability index (HSI) model was developed for a water quality sensitive fish (Greater Redhorse) and macroinvertebrate (Plecoptera) species to determine the restoration success of the St. John Dam removal for the Sandusky River (Ohio). An ArcGIS?? model was created for pre- and post-dam removal scenarios. Inputs to the...
Preferences, specialization, and management attitudes of trout anglers fishing in Tennessee tailwaters
C.P. Hutt, P.W. Bettoli
2007, North American Journal of Fisheries Management (27) 1257-1267
Efforts to manage several trout fisheries in Tennessee have been stymied by conflicts between management agencies and angler groups. To assist in preventing such conflicts in the future, we examined attitudes and motivations of trout anglers who fished eight tailwater fisheries in Tennessee during 2001-2002. Using a stratified random sampling...
Performance evaluation of spectral vegetation indices using a statistical sensitivity function
Lei Ji, Albert J. Peters
2007, Remote Sensing of Environment (106) 59-65
A great number of spectral vegetation indices (VIs) have been developed to estimate biophysical parameters of vegetation. Traditional techniques for evaluating the performance of VIs are regression-based statistics, such as the coefficient of determination and root mean square error. These statistics, however, are not capable of quantifying the detailed relationship...
Use of a wetland index to evaluate changes in riparian vegetation after livestock exclusion
M. C. Coles-Ritchie, D.W. Roberts, J. L. Kershner, R.C. Henderson
2007, Journal of the American Water Resources Association (43) 731-743
A method was developed to characterize ecological integrity of riparian sites based on the abundance of hydric species. This wetland index can be calculated with species data, or with community type data as performed here. Classified riparian community types were used to describe vegetation at 14 livestock exclosures and adjacent...
High-resolution proxy record of Holocene climate from a loess section in Southwestern Nebraska, USA
X. Miao, J.A. Mason, W.C. Johnson, Hongfang Wang
2007, Palaeogeography, Palaeoclimatology, Palaeoecology (245) 368-381
Multi-proxy analysis was used to produce a high-resolution paleoclimatic record from an exceptionally thick section of the Holocene Bignell Loess near Wauneta, Southwestern Nebraska, in the central Great Plains. The Wauneta section has excellent age control, based on optically stimulated luminescence (OSL) and radiocarbon dating, and records multiple episodes of...
Experimental analysis of the auditory detection process on avian point counts
T.R. Simons, M.W. Alldredge, K. H. Pollock, J.M. Wettroth
2007, The Auk (124) 986-999
We have developed a system for simulating the conditions of avian surveys in which birds are identified by sound. The system uses a laptop computer to control a set of amplified MP3 players placed at known locations around a survey point. The system can realistically simulate a known population of...
Annual precipitation in the Yellowstone National Park region since AD 1173
S.T. Gray, L.J. Graumlich, J.L. Betancourt
2007, Quaternary Research (68) 18-27
Cores and cross sections from 133 limber pine (Pinus flexilis James) and Douglas fir (Pseudotsuga menziesii (Mirbel) Franco) at four sites were used to estimate annual (July to June) precipitation in the Yellowstone National Park region for the period from AD 1173 to 1998. Examination of the long-term record shows...
A new, large, late pleistocene demosponge from Southeastern Florida
J.K. Rigby, K.J. Cunningham
2007, Journal of Paleontology (81) 788-793
[No abstract available]...
Identifying fecal sources in a selected catchment reach using multiple source-tracking tools
J. R. Vogel, D. M. Stoeckel, R. Lamendella, R. B. Zelt, Domingo J.W. Santo, S.R. Walker, D.B. Oerther
2007, Journal of Environmental Quality (36) 718-729
Given known limitations of current microbial source-tracking (MST) tools, emphasis on small, simple study areas may enhance interpretations of fecal contamination sources in streams. In this study, three MST tools - Escherichia coli repetitive element polymerase chain reaction (rep-PCR), coliphage typing, and Bacteroidales 16S rDNA host-associated markers - were evaluated...
Anomalous deepening of a belt of intraslab earthquakes in the Pacific slab crust under Kanto, central Japan: Possible anomalous thermal shielding, dehydration reactions, and seismicity caused by shallower cold slab material
A. Hasegawa, J. Nakajima, S. Kita, T. Okada, T. Matsuzawa, S. H. Kirby
2007, Geophysical Research Letters (34)
[1] A belt of intraslab seismicity in the Pacific slab crust parallel to iso-depth contours of the plate interface has been found beneath Hokkaido and Tohoku. Hypocenter relocations have shown that this seismic belt does not run parallel to but obliquely to the iso-depth contours beneath...
Hydrologic response of the Crow Wing Watershed, Minnesota, to mid-Holocene climate change
M. Person, P. Roy, H. Wright, W. Gutowski Jr., E. Ito, T. Winter, D. Rosenberry, D. Cohen
2007, Geological Society of America Bulletin (119) 363-376
In this study, we have integrated a suite of Holocene paleoclimatic proxies with mathematical modeling in an attempt to obtain a comprehensive picture of how watersheds respond to past climate change. A three-dimensional surface-water-groundwater model was developed to assess the effects of mid-Holocene climate change on water resources within the...
Comparison of outgassing models for the Landsat thematic mapper sensors
E. Micijevic, G. Chander
2007, Conference Paper, Proceedings of SPIE - The International Society for Optical Engineering
The Thematic Mapper (TM) is a multi-spectral electro-optical sensor featured onboard both the Landsat 4 (L4) and Landsat 5 (L5) satellites. TM sensors have seven spectral bands with center wavelengths of approximately 0.49, 0.56, 0.66, 0.83, 1.65, 11.5 and 2.21 μm, respectively. The visible near-infrared (VNIR) bands are located on...
Desert tortoise hibernation: Temperatures, timing, and environment
K.E. Nussear, T. C. Esque, D.F. Haines, C.R. Tracy
2007, Copeia 378-386
This research examined the onset, duration, and termination of hibernation in Desert Tortoises (Gopherus agassizii) over several years at multiple sites in the northeastern part of their geographic range, and recorded the temperatures experienced by tortoises during winter hibernation. The timing of hibernation by Desert Tortoises differed among sites and...
Geomorphic and sedimentologic evidence for the separation of Lake Superior from Lake Michigan and Huron
J.W. Johnston, T.A. Thompson, D.A. Wilcox, S.J. Baedke
2007, Journal of Paleolimnology (37) 349-364
A common break was recognized in four Lake Superior strandplain sequences using geomorphic and sedimentologic characteristics. Strandplains were divided into lakeward and landward sets of beach ridges using aerial photographs and topographic surveys to identify similar surficial features and core data to identify similar subsurface features. Cross-strandplain, elevation-trend changes from...
Distributed energy-balance modeling of snow-cover evolution and melt in rugged terrain: Tobacco Root Mountains, Montana, USA
S.L. Letsinger, G.A. Olyphant
2007, Journal of Hydrology (336) 48-60
A distributed energy-balance model was developed for simulating snowpack evolution and melt in rugged terrain. The model, which was applied to a 43-km2 watershed in the Tobacco Root Mountains, Montana, USA, used measured ambient data from nearby weather stations to drive energy-balance calculations and to constrain the model of Liston...
