Upstream migration of two pre-spawning shortnose sturgeon passed upstream of Pinopolis Dam, Cooper River, South Carolina
S.T. Finney, J. Jeffery Isely, D.W. Cooke
2006, Southeastern Naturalist (5) 369-375
Two shortnose sturgeon were artificially passed above the Pinopolis Lock and Dam into the Santee-Cooper Lakes in order to simulate the use of a fish-passage mechanism. Movement patterns and spawning behavior were studied to determine the potential success of future shortnose sturgeon migrations if and when a fish-migration bypass structure...
Holocene history of drift ice in the northern North Atlantic: Evidence for different spatial and temporal modes
M. Moros, John T. Andrews, D. D. Eberl, E. Jansen
2006, Paleoceanography (21)
We present new high-resolution proxy data for the Holocene history of drift ice off Iceland based on the mineralogy of the <2-mm sediment fraction using quantitative X-ray diffraction. These new data, bolstered by a comparison with published proxy records, point to a long-term increasing trend in drift ice input into...
Proposed stratotype for the base of the highest Cambrian stage at the first appearance datum of Cordylodus andresi, Lawson Cove section, Utah, USA
J.F. Miller, Raymond L. Ethington, K.R. Evans, L.E. Holmer, James D. Loch, L.E. Popov, J.E. Repetski, R.L. Ripperdan, John F. Taylor
2006, Palaeoworld (15) 384-405
We propose a candidate for the Global Standard Stratotype-section and Point (GSSP) for the base of the highest stage of the Furongian Series of the Cambrian System. The section is at Lawson Cove in the Ibex area of Millard County, Utah, USA. The marker horizon is the first appearance datum...
Tidal saltmarsh fragmentation and persistence of San Pablo Song Sparrows (Melospiza melodia samuelis): Assessing benefits of wetland restoration in San Francisco Bay
John Y. Takekawa, B.N. Sacks, I. Woo, M.L. Johnson, G.D. Wylie
Greenberg R.Maldonado J.E.Droege S.McDonald M.V., editor(s)
2006, Studies in Avian Biology 238-246
The San Pablo Song Sparrow (Melospiza melodia samuelis) is one of three morphologically distinct Song Sparrow subspecies in tidal marshes of the San Francisco Bay estuary. These subspecies are rare, because as the human population has grown, diking and development have resulted in loss of 79% of the historic tidal...
Improving the precision of otolith-based age estimates for Greenland halibut (Reinhardtius hippoglossoides) with preparation methods adapted for fragile sagittae
J.L. Gregg, D.M. Anderl, D.K. Kimura
2006, Fishery Bulletin (104) 643-648
[No abstract available]...
A reexamination of the Sudbury landing
D.S. Ross
2006, Icarus (183) 233-234
The arrival of the massive body that led to the Sudbury impact structure has been interpreted as a relatively gentle event, with temperatures not exceeding 1300 K on the basis of the presence of fullerene-caged helium. Such temperatures are well below the 10,000 K peaks suggested in large impact modeling,...
Late Pleistocene outburst flooding from pluvial Lake Alvord into the Owyhee River, Oregon
D.T. Carter, L.L. Ely, J. E. O’Connor, C.R. Fenton
2006, Geomorphology (75) 346-367
At least one large, late Pleistocene flood traveled into the Owyhee River as a result of a rise and subsequent outburst from pluvial Lake Alvord in southeastern Oregon. Lake Alvord breached Big Sand Gap in its eastern rim after reaching an elevation of 1292 m, releasing 11.3 km3 of water...
Arbuscular mycorrhizal assemblages in native plant roots change in the presence of invasive exotic grasses
C.V. Hawkes, J. Belnap, C. D'Antonio, M.K. Firestone
2006, Plant and Soil (281) 369-380
Plant invasions have the potential to significantly alter soil microbial communities, given their often considerable aboveground effects. We examined how plant invasions altered the arbuscular mycorrhizal fungi of native plant roots in a grassland site in California and one in Utah. In the California site, we used experimentally created plant...
Demography, genetics, and the value of mixed messages
John M. Pearce, Sandra L. Talbot
2006, Condor (108) 474-479
Iverson et al. (2004) used estimates of the homing rate for molting adult Harlequin Ducks (Histrionicus histrionicus) in Alaska to draw inferences about population structure. Homing rates, defined as one minus the ratio of birds recaptured elsewhere to those recaptured at the original banding site, were high (0.95–1.00) for males...
Paleotsunami research
B. Rhodes, M. Tuttle, B. Horton, L. Doner, H. Kelsey, A. Nelson, M. Cisternas
2006, Eos, Transactions, American Geophysical Union (87) 208-209
[No abstract available]...
Early Cretaceous terrestrial ecosystems in East Asia based on food-web and energy-flow models
M. Matsukawa, K. Saiki, M. Ito, I. Obata, D. J. Nichols, M.G. Lockley, R. Kukihara, K. Shibata
2006, Cretaceous Research (27) 285-307
In recent years, there has been global interest in the environments and ecosystems around the world. It is helpful to reconstruct past environments and ecosystems to help understand them in the present and the future. The present environments and ecosystems are an evolving continuum with those of the past and...
Coseismic and initial postseismic deformation from the 2004 Parkfield, California, earthquake, observed by global positioning system, electronic distance meter, creepmeters, and borehole strainmeters
J. Langbein, J.R. Murray, Hollice A. Snyder
2006, Bulletin of the Seismological Society of America (96)
Global Positioning System (GPS), electronic distance meter, creepmeter, and strainmeter measurements spanning the M 6.0 Parkfield, California, earthquake are examined. Using these data from 100 sec through 9 months following the main-shock, the Omori's law, with rate inversely related to time, l/t p and p ranging between 0.7 and 1.3,...
Gemstones
D.W. Olson
2006, Mining Engineering (58) 31-32
During 2005, the estimated value of natural gemstones produced from US deposits was $13.9 million. Production included agates, amber, beryl, coral, garnet, jade, jasper, opal, pearl, quartz, sapphire, shell, topaz, tourmaline, and torquoise among others. For the year, the US gemstone trade with all countries and territories exceeded $26 billion....
Carryover aquatic effects on survival of metamorphic frogs during pond emigration
N.D. Chelgren, D.K. Rosenberg, S.S. Heppell, A.I. Gitelman
2006, Ecological Applications (16) 250-261
In organisms with complex life cycles, physiological stressors during early life stages may have fitness-level impacts that are delayed into later stages or habitats. We tested the hypothesis that body size and date of metamorphosis, which are highly responsive to aquatic stressors, influence post-metamorphic survival and movement patterns in the...
Experiments on δ34S mixing between organic and inorganic sulfur species during thermal maturation
Alon Amrani, Ward Said-Ahamed, Michael D. Lewan, Zeev Aizenshtat
2006, Geochimica et Cosmochimica Acta (70) 5146-5161
Reduced sulfur species were studied to constrain isotopic exchange-mixing with synthetic polysulfide cross-linked macromolecules (PCLM), model sulfur containing molecules and natural sulfur-rich kerogen, asphalt and oil of the Dead Sea area. PCLM represents protokerogens that are rich in sulfur and thermally unstable. Mixing rates of PCLM with <a...
Hazardous cracks running through Arizona
R. Harris, M.L. Allison
2006, Geotimes (51) 24-27
[No abstract available]...
A stochastic estimate of ground motion at Oceano, California, for the M 6.5 22 December 2003 San Simeon earthquake, derived from aftershock recordings
Alessandro C. Di, J. Boatwright
2006, Bulletin of the Seismological Society of America (96) 1437-1447
The U.S. Geological Survey deployed a digital seismic station in Oceano, California, in February 2004, to investigate the cause of damage and liquefaction from the 22 December 2003 M 6.5 San Simeon earthquake. This station recorded 11 M > 2.8 aftershocks in almost 8 weeks. We analyze these recordings, together...
Integration of P- and SH-wave high-resolution seismic reflection and micro-gravity techniques to improve interpretation of shallow subsurface structure: New Madrid seismic zone
C.E. Bexfield, J.H. McBride, Andre J. M. Pugin, D. Ravat, S. Biswas, W.J. Nelson, T.H. Larson, S.L. Sargent, M.A. Fillerup, B.E. Tingey, L. Wald, M.L. Northcott, J.V. South, M.S. Okure, M.R. Chandler
2006, Tectonophysics (420) 5-21
Shallow high-resolution seismic reflection surveys have traditionally been restricted to either compressional (P) or horizontally polarized shear (SH) waves in order to produce 2-D images of subsurface structure. The northernmost Mississippi embayment and coincident New Madrid seismic zone (NMSZ) provide an ideal laboratory to study the experimental use of integrating...
Monitoring low density avian populations: An example using Mountain Plovers
V.J. Dreitz, P.M. Lukacs, F.L. Knopf
2006, Condor (108) 700-706
Declines in avian populations highlight a need for rigorous, broad-scale monitoring programs to document trends in avian populations that occur in low densities across expansive landscapes. Accounting for the spatial variation and variation in detection probability inherent to monitoring programs is thought to be effort-intensive and time-consuming. We determined the...
Lake sturgeon population characteristics in Rainy Lake, Minnesota and Ontario
W.E. Adams Jr., L.W. Kallemeyn, D.W. Willis
2006, Journal of Applied Ichthyology (22) 97-102
Rainy Lake contains a native population of lake sturgeon Acipenser fulvescens that has been largely unstudied. The aims of this study were to document the population characteristics of lake sturgeon in Rainy Lake and to relate environmental factors to year-class strength for this population. Gill-netting efforts throughout the study resulted...
State summaries: Utah
R.L. Bon, K.A. Krahulec
2006, Mining Engineering (58) 116-122
The value of Utah's mineral production in 2005 was estimated to be a record $3.58 billion. This was $1.26 billion higher than the revised value of $2.32 billion for 2004. All major industry segments gained in value in 2005. In the value of nonfuel mineral production, Utah ranked fourth. The...
Increases in desert shrub productivity under elevated carbon dioxide vary with water availability
D.C. Housman, E. Naumburg, T. E. Huxman, T.N. Charlet, R.S. Nowak, S.D. Smith
2006, Ecosystems (9) 374-385
Productivity of aridland plants is predicted to increase substantially with rising atmospheric carbon dioxide (CO2) concentrations due to enhancement in plant water-use efficiency (WUE). However, to date, there are few detailed analyses of how intact desert vegetation responds to elevated CO2. From 1998 to 2001, we examined aboveground production, photosynthesis,...
Spatial use by wintering greater white-fronted geese relative to a decade of habitat change in California's Central Valley
Joshua T. Ackerman, John Y. Takekawa, D.L. Orthmeyer, J. P. Fleskes, J.L. Yee, K.L. Kruse
2006, Journal of Wildlife Management (70) 965-976
We investigated the effect of recent habitat changes in California's Central Valley on wintering Pacific greater white-fronted geese (Anser albifrons frontalis) by comparing roost-to-feed distances, distributions, population range sizes, and habitat use during 1987-1990 and 1998-2000. These habitat changes included wetland restoration and agricultural land enhancement due to the 1990...
Population structure, persistence, and seasonality of autochthonous Escherichia coli in temperate, coastal forest soil from a Great Lakes watershed
M.N. Byappanahalli, R.L. Whitman, D.A. Shively, M.J. Sadowsky, S. Ishii
2006, Environmental Microbiology (8) 504-513
The common occurrence of Escherichia coli in temperate soils has previously been reported, however, there are few studies to date to characterize its source, distribution, persistent capability and genetic diversity. In this study, undisturbed, forest soils within six randomly selected 0.5 m2 exclosure plots (covered by netting of 2.3 mm2...
Effects of Chinese mineral strategies on the U.S. minerals industry
L. McCartan, W. D. Menzie, D.E. Morse, J.F. Papp, P.A. Plunkert, P.-K. Tse
2006, Mining Engineering (58) 37-42
For more than two decades now, China has been undergoing rapid economic growth and industrialization. The industrialization and urbanization of the once rural, farming nation is leading to increased consumption of mineral commodities to build infrastructure and to make into consumer goods. This increased consumption has led to higher mineral...
