Reappearance of deepwater sculpin in Lake Ontario: Resurgence or last gasp of a doomed population?
B.F. Lantry, R. O'Gorman, M. G. Walsh, J.M. Casselman, J.A. Hoyle, M.J. Keir, J.R. Lantry
2007, Journal of Great Lakes Research (33) 34-45
Deepwater sculpin (Myoxocephalus thompsonii) were abundant in Lake Ontario in the 1920s and at least common into the 1940s. By the 1960s they were rare and, thereafter, some considered the population extirpated even though a synoptic survey of the lake in 1972 produced three, relatively large (148–165 mm total length,...
Pre-, syn-, and postcollisional stratigraphic framework and provenance of upper triassic-upper cretaceous strata in the northwestern talkeetna mountains, alaska
B. A. Hampton, K.D. Ridgway, J.M. O’Neill, G. E. Gehrels, J. Schmidt, R. B. Blodgett
2007, Special Paper of the Geological Society of America 401-438
Mesozoic strata of the northwestern Talkeetna Mountains are located in a regional suture zone between the allochthonous Wrangellia composite terrane and the former Mesozoic continental margin of North America (i.e., the Yukon-Tanana terrane). New geologic mapping, measured stratigraphic sections, and provenance data define a distinct three-part stratigraphy for these strata....
Diverse dinosaur-dominated ichnofaunas from the Potomac Group (Lower Cretaceous) Maryland
Ray Stanford, Martin G. Lockley, Robert E. Weems
2007, Ichnos: An International Journal for Plant and Animal Traces (14) 155-173
Until recently fossil footprints were virtually unknown from the Cretaceous of the eastern United States. The discovery of about 300 footprints in iron-rich siliciclastic facies of the Patuxent Formation (Potomac Group) of Aptian age is undoubtedly one of the most significant Early Cretaceous track discoveries since the Paluxy track discoveries...
An analytical model of the mechanical properties of bulk coal under confined stress
G.X. Wang, Z.T. Wang, V. Rudolph, P. Massarotto, R.J. Finley
2007, Fuel (86) 1873-1884
This paper presents the development of an analytical model which can be used to relate the structural parameters of coal to its mechanical properties such as elastic modulus and Poisson's ratio under a confined stress condition. This model is developed primarily to support process modeling of coalbed methane (CBM) or...
Using simulated historical time series to prioritize fuel treatments on landscapes across the United States: The LANDFIRE prototype project
Robert E. Keane, Matthew Rollins, Zhi-Liang Zhu
2007, Ecological Modelling (204) 485-502
Canopy and surface fuels in many fire-prone forests of the United States have increased over the last 70 years as a result of modern fire exclusion policies, grazing, and other land management activities. The Healthy Forest Restoration Act and National Fire Plan establish a national commitment to reduce fire hazard...
Factors to consider for trace element deposition biomonitoring surveys with lichen transplants
S. Ayrault, R. Clochiatti, F. Carrot, L. Daudin, J. P. Bennett
2007, Science of the Total Environment (372) 717-727
A trace element deposition biomonitoring experiment with transplants of the fruticose lichen Evernia prunastri was developed, aimed at monitoring the effects of different exposure parameters (exposure orientation and direct rain) and to the elements Ti, V, Cr, Co, Cu, Zn, Rb, Cd, Sb and Pb. Accumulations were observed for most...
Effect of bedrock permeability on subsurface stormflow and the water balance of a trenched hillslope at the Panola Mountain Research Watershed, Georgia, USA
Meerveld H. J. Tromp-van H. J., N.E. Peters, Jeffery J. McDonnell
2007, Hydrological Processes (21) 750-769
The effect of bedrock permeability on subsurface stormflow initiation and the hillslope water balance is poorly understood. Previous hillslope hydrological studies at the Panola Mountain Research Watershed (PMRW), Georgia, USA, have assumed that the bedrock underlying the trenched hillslope is effectively impermeable. This paper presents a series of sprinkling experiments...
Developing a flood monitoring system from remotely sensed data for the Limpopo basin
K.O. Asante, R.D. Macuacua, G. A. Artan, R.W. Lietzow, J. P. Verdin
2007, IEEE Transactions on Geoscience and Remote Sensing (45) 1709-1714
This paper describes the application of remotely sensed precipitation to the monitoring of floods in a region that regularly experiences extreme precipitation and flood events, often associated with cyclonic systems. Precipitation data, which are derived from spaceborne radar aboard the National Aeronautics and Space Administration's Tropical Rainfall Measuring Mission and...
Role of chemotaxis in the transport of bacteria through saturated porous media
R.M. Ford, Ronald W. Harvey
2007, Advances in Water Resources (30) 1608-1617
Populations of chemotactic bacteria are able to sense and respond to chemical gradients in their surroundings and direct their migration toward increasing concentrations of chemicals that they perceive to be beneficial to their survival. It has been suggested that this phenomenon may facilitate bioremediation processes by bringing bacteria into closer...
Population-scale movement of coastal cutthroat trout in a naturally isolated stream network
R. E. Gresswell, S.R. Hendricks
2007, Transactions of the American Fisheries Society (136) 238-253
To identify population‐scale patterns of movement, coastal cutthroat trout Oncorhynchus clarkii clarkii tagged and marked (35 radio‐tagged, 749 passive integrated transponder [PIT]‐tagged, and 3,025 fin‐clipped) were monitored from June 1999 to August 2000. The study watershed, located in western Oregon, was above a natural barrier to upstream movement. Emigration...
Impact of hurricanes storm surges on the groundwater resources
T. P. Van Biersel, D.A. Carlson, L.R. Milner
2007, Environmental Geology (53) 813-826
Ocean surges onto coastal lowlands caused by tropical and extra tropical storms, tsunamis, and sea level rise affect all coastal lowlands and present a threat to drinking water resources of many coastal residents. In 2005, two such storms, Hurricanes Katrina and Rita struck the Gulf Coast of the US. Since...
Improved husbandry to control an outbreak of rainbow trout fry syndrome caused by infection with Flavobacterium psychrophilum
J.A. Bebak, T.J. Welch, C. E. Starliper, A.M. Baya, M. M. Garner
2007, Journal of the American Veterinary Medical Association (231) 114-116
Case Description - A cohort of 35,200, 13-week-old, female rainbow trout at a fish farm was evaluated because of a 2-week history of anorexia and lethargy and a mortality rate of approximately 100 fish/d. Clinical Findings - Affected fish were lethargic and thin and had disequilibrium, bilateral exophthalmia, pale red...
Diamondoid hydrocarbons as a molecular proxy for thermal maturity and oil cracking: Geochemical models from hydrous pyrolysis
Z. Wei, J.M. Moldowan, S. Zhang, R. Hill, D.M. Jarvie, Hongfang Wang, F. Song, F. Fago
2007, Organic Geochemistry (38) 227-249
A series of isothermal hydrous pyrolysis experiments was performed on immature sedimentary rocks and peats of different lithology and organic source input to explore the generation of diamondoids during the thermal maturation of sediments. Oil generation curves indicate that peak oil yields occur between 340 and 360 ??C, followed by...
Origin of the Lyme Dome and implications for the timing of multiple Alleghanian deformational and intrusive events in southern Connecticut
G. J. Walsh, J. N. Aleinikoff, R. P. Wintsch
2007, American Journal of Science (307) 168-215
Geologic mapping, structural analysis, and geochronology in the area of the Lyme dome, southern Connecticut provides constraints on the origin of the rocks in the core of the dome, the absolute timing of the principal deformational and thermal events attributed to Alleghanian orogenesis, and the processes that generated the dome....
Linkages between nutrients and assemblages of macroinvertebrates and fish in wadeable streams: Implication to nutrient criteria development
L. Wang, Dale M. Robertson, P.J. Garrison
2007, Environmental Management (39) 194-212
We sampled 240 wadeable streams across Wisconsin for different forms of phosphorus and nitrogen, and assemblages of macroinvertebrates and fish to (1) examine how macroinvertebrate and fish measures correlated with the nutrients; (2) quantify relationships between key biological measures and nutrient forms to identify potential threshold levels of nutrients to...
Abiotic influences on the biomass of Vallisneria americana Michx. In the Upper Mississippi River
Rebecca M. Kreiling, Y. Yin, D.T. Gerber
2007, River Research and Applications (23) 343-349
American wildcelery, Vallisneria americana Michx. is an ecologically important component of aquatic communities in the Upper Mississippi River (UMR). We conducted a study in 2002 to determine the association of several abiotic factors on the vegetative growth of Vallisneria in Navigation Pool 8 (Pool 8) of the UMR. We measured...
An automated approach to detecting signals in electroantennogram data
D. H. Slone, B.T. Sullivan
2007, Journal of Chemical Ecology (33) 1748-1762
Coupled gas chromatography/electroantennographic detection (GC-EAD) is a widely used method for identifying insect olfactory stimulants present in mixtures of volatiles, and it can greatly accelerate the identification of insect semiochemicals. In GC-EAD, voltage changes across an insect's antenna are measured while the antenna is exposed to compounds eluting from a...
Annual arctic wolf pack size related to arctic hare numbers
L.D. Mech
2007, Arctic (60) 309-311
During the summers of 2000 through 2006, I counted arctic wolf (Canis lupus arctos) pups and adults in a pack, arctic hares (Lepus arcticus) along a 9 km index route in the area, and muskoxen (Ovibos moschatus) in a 250 km2 part of the area near Eureka (80?? N, 86??...
Achieving satellite instrument calibration for climate change
G. Ohring, J. Tansock, W. Emery, J. Butler, L. Flynn, F. Weng, Germain K. St. K., B. Wielicki, C. Cao, M. Goldberg, J. Xiong, G. Fraser, D. Kunkee, D. Winker, L. Miller, S. Ungar, D. Tobin, J.G. Anderson, D. Pollock, S. Shipley, A. Thurgood, G. Kopp, P. Ardanuy, T. Stone
2007, Conference Paper, Eos
[No abstract available]...
Factors controlling soil water and stream water aluminum concentrations after a clearcut in a forested watershed with calcium-poor soils
M.R. McHale, Douglas A. Burns, G.B. Lawrence, Peter S. Murdoch
2007, Biogeochemistry (84) 311-331
The 24 ha Dry Creek watershed in the Catskill Mountains of southeastern New York State USA was clearcut during the winter of 1996-1997. The interactions among acidity, nitrate (NO3- ), aluminum (Al), and calcium (Ca2+) in streamwater, soil water, and groundwater were evaluated to determine how they affected the speciation,...
Completion of the 2001 National Land Cover Database for the conterminous United States
Collin G. Homer, Jon Dewitz, Joyce Fry, Michael Coan, N. Hossain, C. Larson, Nate Herold, Alexa McKerrow, J.N. VanDriel, James Wickham
2007, Photogrammetric Engineering and Remote Sensing (73) 337-341
No abstract available....
Applications of the JARS method to study levee sites in southern Texas and southern New Mexico
J. Ivanov, R. D. Miller, J. Xia, J.B. Dunbar
2007, Conference Paper, SEG Technical Program Expanded Abstracts
We apply the joint analysis of refractions with surface waves (JARS) method to several sites and compare its results to traditional refraction-tomography methods in efforts of finding a more realistic solution to the inverse refraction-traveltime problem. The JARS method uses a reference model, derived from surface-wave shear-wave velocity estimates, as...
In situ quantitative analysis of individual H2O-CO2 fluid inclusions by laser Raman spectroscopy
T. Azbej, M.J. Severs, B.G. Rusk, R.J. Bodnar
2007, Chemical Geology (237) 255-263
Raman spectral parameters for the Raman ??1 (1285??cm- 1) and 2??2 (1388??cm- 1) bands for CO2 and for the O-H stretching vibration band of H2O (3600??cm- 1) were determined in H2O-CO2 fluid inclusions. Synthetic fluid inclusions containing 2.5 to 50??mol% CO2 were analyzed at temperatures equal to or greater than...
Distribution and abundance of zooplankton populations in Crater Lake, Oregon
G.L. Larson, C. D. McIntire, M.W. Buktenica, S.F. Girdner, R.E. Truitt
2007, Hydrobiologia (574) 217-233
The zooplankton assemblages in Crater Lake exhibited consistency in species richness and general taxonomic composition, but varied in density and biomass during the period between 1988 and 2000. Collectively, the assemblages included 2 cladoceran taxa and 10 rotifer taxa (excluding rare taxa). Vertical habitat partitioning of the water column to...
Velafrons coahuilensis, a new labeosaurine haddrosaurid (Dinosauria: Ornithopoda) from the Late Campanian Cerro del Pueblo formation, Coahuila, Mexico
Terry A. Gates, Scott D. Sampson, Carlos R. Delgado de Jesus, Lindsay E. Zanno, David Eberth, Rene Hernandez-Rivera, Martha C. Aguillon-Martinez, James I. Kirkland
2007, Journal of Vertebrate Paleontology (27) 917-930
A new lambeosaurine hadrosaurid, Velafrons coahuilensis, is described as the first lambeosaurine from the Cerro del Pueblo Formation of Coahuila, Mexico, and the first lambeosaurine genus to be named from North America in more than 70 years. Although the holotype specimen is a juvenile individual—as evidenced by its incomplete crest development...
