Juvenile blue crab abundances in natural and man-made tidal channels in mangrove habitat, Tampa Bay, Florida (USA)
L.A. Yeager, J.M. Krebs, C.C. McIvor, A.B. Brame
2007, Conference Paper, Bulletin of Marine Science
[No abstract available]...
Geologic framework of the Mississippian Barnett Shale, Barnett-Paleozoic total petroleum system, Bend arch-Fort Worth Basin, Texas
R. M. Pollastro, D.M. Jarvie, R.J. Hill, C.W. Adams
2007, American Association of Petroleum Geologists Bulletin (91) 405-436
This article describes the primary geologic characteristics and criteria of the Barnett Shale and Barnett-Paleozoic total petroleum system (TPS) of the Fort Worth Basin used to define two geographic areas of the Barnett Shale for petroleum resource assessment. From these two areas, referred to as "assessment units," the U.S. Geological...
Waterfowl distribution and abundance during spring migration in Southern Oregon and Northeastern California
J. P. Fleskes, J.L. Yee
2007, Western North American Naturalist (67) 409-428
We used aerial surveys to study abundance and distribution of waterfowl (ducks, geese, swans, and coots) during spring in southern Oregon and northeastern California (SONEC). Total waterfowl-use days in SONEC during the 119-day, 5 January-3 May, spring period was similar during 2002 (127,977,700) and 2003 (128,076,200) and averaged 1,075,900 birds...
Nature, diversity of deposit types and metallogenic relations of South China
K. Zaw, S. G. Peters, P. Cromie, C. Burrett, Z. Hou
2007, Ore Geology Reviews (31) 3-47
The South China Region is rich in mineral resources and has a wide diversity of deposit types. The region has undergone multiple tectonic and magmatic events and related metallogenic processes throughout the earth history. These tectonic and metallogenic processes were responsible for the formation of the diverse styles of base...
Circum-arctic map compilation
R. W. Saltus, C. Gaina
2007, Conference Paper, Eos
[No abstract available]...
Dynamics of CFCs in northern temperate lakes and adjacent groundwater
John F. Walker, David A. Saad, Randall J. Hunt
2007, Water Resources Research (43)
Three dimictic lakes and one meromictic lake in and near the Trout Lake, Wisconsin, watershed were sampled to determine the variation of chlorofluorocarbon (CFC) concentrations within the lakes. The lakes were sampled during stratified conditions, during fall turnover, and during ice cover. The results demonstrate a considerable variation in CFC...
Generalization of von Neumann analysis for a model of two discrete half-spaces: The acoustic case
M.M. Haney
2007, Geophysics (72)
Evaluating the performance of finite-difference algorithms typically uses a technique known as von Neumann analysis. For a given algorithm, application of the technique yields both a dispersion relation valid for the discrete time-space grid and a mathematical condition for stability. In practice, a major shortcoming of conventional von Neumann analysis...
Sources and temporal dynamics of arsenic in a New Jersey watershed, USA
J. L. Barringer, J.L. Bonin, M.J. DeLuca, T. Romagna, K. Cenno, M. Alebus, T. Kratzer, B. Hirst
2007, Science of the Total Environment (379) 56-74
We examined potential sources and the temporal dynamics of arsenic (As) in the slightly alkaline waters of the Wallkill River, northwestern New Jersey, where violations of water-quality standards have occurred. The study design included synoptic sampling of stream water and bed sediments in...
Hydrogeologic controls imposed by mechanical stratigraphy in layered rocks of the Chateauguay River Basin, a U.S.-Canada transborder aquifer
Roger H. Morin, Rejean Godin, Miroslav Nastev, Alain Rouleau
2007, Journal of Geophysical Research B: Solid Earth (112)
[1] The Châteauguay River Basin delineates a transborder watershed with roughly half of its surface area located in northern New York State and half in southern Québec Province, Canada. As part of a multidisciplinary study designed to characterize the hydrogeologic properties of this basin, geophysical logs were obtained in 12...
Coastal communities
J.M. Baldizar, N. B. Rybicki
2007, Ecological Restoration (25) 138-139
[No abstract available]...
Thioarsenates in geothermal waters of Yellowstone National Park: Determination, preservation, and geochemical importance
B. Planer-Friedrich, J. London, R. Blaine McCleskey, D. Kirk Nordstrom, D. Wallschlager
2007, Environmental Science & Technology (41) 5245-5251
Mono-, di-, tri-, and tetrathioarsenate, as well as methylated arsenic oxy- and thioanions, were determined besides arsenite and arsenate in geothermal waters of Yellowstone National Park using anion-exchange chromatography inductively coupled plasma mass spectrometry. Retention time match with synthetic standards, measured S:As ratios, and molecular electrospray mass spectra support the...
Ecological observations on the colonial ascidian Didemnum sp. in a New England tide pool habitat
P. C. Valentine, M.R. Carman, D.S. Blackwood, E.J. Heffron
2007, Journal of Experimental Marine Biology and Ecology (342) 109-121
The colonial ascidian Didemnum sp. has colonized northwestern Atlantic coastal habitats from southern Long Island, New York, to Eastport, Maine. It is also present in offshore habitats of the Georges Bank fishing grounds. It threatens to alter fisheries habitats and shellfish aquacultures. Observations in a tide pool at Sandwich, MA from...
The lakes and seas of Titan
Rosaly Lopes, Karl L. Mitchell, Stephen D. Wall, Giuseppe Mitri, Michael Janssen, Steven J. Ostro, Randolph L. Kirk, Alexander G. Hayes, Ellen R. Stofan, Jonathan I. Lunine, Ralph D. Lorenz, Charles Wood, Jani Radebaugh, Philipe Paillou, H. Zebker, Flora Paganelli
2007, Eos, Transactions, American Geophysical Union (88)
No abstract available....
Flyway-scale variation in plasma triglyceride levels as an index of refueling rate in spring-migrating western sandpipers (Calidris mauri)
T.D. Williams, N. Warnock, John Y. Takekawa, M.A. Bishop
2007, The Auk (124) 886-897
We combined radiotelemetry, plasma metabolite analyses, and macro-invertebrate prey sampling to investigate variation in putative fattening rates (estimated as plasma triglyceride levels) at the flyway scale in Western Sandpipers (Calidris mauri) migrating between Punta Banda, Mexico (31°N), and Hartney Bay, Alaska (60°N), a distance of 4,240 km. Birds were caught...
Early discrimination of Atlantic salmon smolt age: Time course of the relative effectiveness of body size and shape
J.H. Pearlstein, B. H. Letcher, M. Obedzinski
2007, Transactions of the American Fisheries Society (136) 1622-1632
The goal of this study was to test the relative effectiveness of morphological measurements and body size in predicting the smolt age of Atlantic salmon Salmo salar and to determine the time course of body size and shape differences between smolt ages. Analyses were conducted on age-0 to age-2 fish...
Willow Flycatcher nonbreeding territory defense behavior in Costa Rica
M. K. Sogge, T. J. Koronkiewicz, Charles van Riper III, S.L. Durst
2007, The Condor (109) 475-480
We studied the intraspecific territorial defense behavior of wintering Willow Flycatchers (Empidonax traillii) in Costa Rica using a randomized playback experiment that exposed male and female birds to recordings of Willow Flycatcher songs and calls, Lesser Ground Cuckoo (Morococcyx erythropygius) vocalizations, and random noise. Flycatchers of both sexes responded most...
Quantifying foodweb interactions with simultaneous linear equations: Stable isotope models of the Truckee River, USA
L. Saito, C. Redd, S. Chandra, L. Atwell, C.H. Fritsen, Michael R. Rosen
2007, Journal of the North American Benthological Society (26) 642-662
Aquatic foodweb models for 2 seasons (relatively high- [March] and low-flow [August] conditions) were constructed for 4 reaches on the Truckee River using ??13C and ??15N data from periphyton, macroinvertebrate, and fish samples collected in 2003 and 2004. The models were constructed with isotope values that included measured periphyton signatures...
Mammoth (Mammuthus sp.) excavation on a college campus in Western Illinois, USA
J.D. Treworgy, J.J. Saunders, D.A. Grimley
2007, Quaternary International (169-170) 24-28
The discovery of the remains of a mammoth, Mammuthus sp., on the Principia College campus in Elsah, Illinois, has allowed for careful excavation by students over several years. The mammoth is relatively well preserved in late Wisconsin Peoria Silt on the top of the bluffs of the Mississippi River. The...
A rapid method to characterize seabed habitats and associated macro-organisms
T.J. Anderson, G.R. Cochrane, D.A. Roberts, H. Chezar, G. Hatcher
Todd B.J.Greene H.G., editor(s)
2007, Special Paper - Geological Association of Canada 71-79
This study presents a method for rapidly collecting, processing, and interrogating real-time abiotic and biotic seabed data to determine seabed habitat classifications. This is done from data collected over a large area of an acoustically derived seabed map, along multidirectional transects, using a towed small camera-sled. The seabed, within the...
Preface
J.P.-Y. Maa, L.P. Sanford, D. H. Schoellhamer
Maa J.P.Y.Sanford L.P.Schoellhamer D.H., editor(s)
2007, Proceedings in Marine Science (8) v-vi
No abstract available....
The role of headwater streams in downstream water quality
R. B. Alexander, E.W. Boyer, R. A. Smith, G. E. Schwarz, R. B. Moore
2007, Journal of the American Water Resources Association (43) 41-59
Knowledge of headwater influences on the water-quality and flow conditions of downstream waters is essential to water-resource management at all governmental levels; this includes recent court decisions on the jurisdiction of the Federal Clean Water Act (CWA) over upland areas that contribute to larger downstream water bodies. We review current...
Breeding ponds colonized by striped newts after 10 or more years
C.K. Dodd Jr., S. A. Johnson
2007, Herpetological Review (38) 150-152
[No abstract available]...
Massive edifice failure at Aleutian arc volcanoes
Michelle L. Coombs, S.M. White, D.W. Scholl
2007, Earth and Planetary Science Letters (256) 403-418
Along the 450-km-long stretch of the Aleutian volcanic arc from Great Sitkin to Kiska Islands, edifice failure and submarine debris-avalanche deposition have occurred at seven of ten Quaternary volcanic centers. Reconnaissance geologic studies have identified subaerial evidence for large-scale prehistoric collapse events at five of the centers (Great Sitkin, Kanaga,...
Relationship between evapotranspiration and precipitation pulses in a semiarid rangeland estimated by moisture flux towers and MODIS vegetation indices
P.L. Nagler, E. P. Glenn, H. Kim, W. Emmerich, R.L. Scott, T. E. Huxman, A.R. Huete
2007, Journal of Arid Environments (70) 443-462
We used moisture Bowen ratio flux tower data and the enhanced vegetation index (EVI) from the moderate resolution imaging spectrometer (MODIS) on the Terra satellite to measure and scale evapotranspiration (ET) over sparsely vegetated grassland and shrubland sites in a semiarid watershed in southeastern Arizona from 2000 to 2004. The...
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...
