Three-dimensional compressional wavespeed model, earthquake relocations, and focal mechanisms for the Parkfield, California, region
C. Thurber, H. Zhang, F. Waldhauser, J. Hardebeck, A. Michael, D. Eberhart-Phillips
2006, Bulletin of the Seismological Society of America (96)
We present a new three-dimensional (3D) compressional vvavespeed (V p) model for the Parkfield region, taking advantage of the recent seismicity associated with the 2003 San Simeon and 2004 Parkfield earthquake sequences to provide increased model resolution compared to the work of Eberhart-Phillips and Michael (1993) (EPM93). Taking the EPM93...
Data report: Permeabilities of eastern equatorial Pacific and Peru margin sediments
Kusali Gamage, Barbara A. Bekins, Elizabeth Screaton
Bo B. Jorgensen, Steven L. D’Hondt, D. Jay Miller, editor(s)
2006, Proceedings of the Ocean Drilling Program: Scientific Results 201-18
Constant-flow permeability tests were conducted on core samples from Ocean Drilling Program Leg 201 from the eastern equatorial Pacific and the Peru margin. Eighteen whole-round core samples from Sites 1225, 1226, 1227, 1230, and 1231 were tested for vertical permeabilities. Sites 1225, 1226, and 1231 represent sediments of the open...
The use of artificial impoundments by two amphibian species in the Delaware Water Gap National Recreation Area
J.T. Julian, C.D. Snyder, J.A. Young
2006, Northeastern Naturalist (13) 459-468
We compared breeding activity of Ambystoma maculatum (Spotted Salamander) and Rana sylvatica (Wood Frog) in artificial impoundments to patterns in natural wetlands over a three-year period in the Delaware Water Gap National Recreation Area. Rana sylvatica were 5.6 times more likely to use natural bodies of water for breeding than...
Addition of simultaneous heat and solute transport and variable fluid viscosity to SEAWAT
D. Thorne, C.D. Langevin, M.C. Sukop
2006, Computers & Geosciences (32) 1758-1768
SEAWAT is a finite-difference computer code designed to simulate coupled variable-density ground water flow and solute transport. This paper describes a new version of SEAWAT that adds the ability to simultaneously model energy and solute transport. This is necessary for simulating the transport of heat and salinity in coastal aquifers...
Recorded earthquake responses from the integrated seismic monitoring network of the Atwood Building, Anchorage, Alaska
M. Çelebi
2006, Earthquake Spectra (22) 847-864
An integrated seismic monitoring system with a total of 53 channels of accelerometers is now operating in and at the nearby free-field site of the 20-story steel-framed Atwood Building in highly seismic Anchorage, Alaska. The building has a single-story basement and a reinforced concrete foundation without piles. The monitoring system...
Dietary calcein marking of brook trout, Atlantic salmon, yellow perch, and coho salmon scales
D. C. Honeyfield, C.S. Ostrowski, J.W. Fletcher, J.W. Mohler
2006, North American Journal of Fisheries Management (26) 431-437
Brook trout Salvelinus fontinalis, Atlantic salmon Salmo salar, coho salmon Oncorhynchus kisutch, and yellow perch Perca flavescens fed calcein for 5 d showed characteristic calcein scale marks 7-10 d postmarking. In fish fed 0.75 or 1.25 g of calcein per kilogram of feed, the percentage of fish that exhibited a...
Soil grain analyses at Meridiani Planum, Mars
C.M. Weitz, R. C. Anderson, J.F. Bell III, W. H. Farrand, Kenneth E. Herkenhoff, J. R. Johnson, B.L. Jolliff, R.V. Morris, S. W. Squyres, R.J. Sullivan
2006, Journal of Geophysical Research E: Planets (111)
Grain‐size analyses of the soils at Meridiani Planum have been used to identify rock sources for the grains and provide information about depositional processes under past and current conditions. Basaltic sand, dust, millimeter‐size hematite‐rich spherules interpreted as concretions, spherule fragments, coated partially buried spherules, basalt fragments, sedimentary outcrop fragments, and...
Using digital photographs and object-based image analysis to estimate percent ground cover in vegetation plots
J.D. Luscier, W.L. Thompson, J. M. Wilson, B.E. Gorham, L.D. Dragut
2006, Frontiers in Ecology and the Environment (4) 408-413
Ground vegetation influences habitat selection and provides critical resources for survival and reproduction of animals. Researchers often employ visual methods to estimate ground cover, but these approaches may be prone to observer bias. We therefore evaluated a method using digital photographs of vegetation to objectively quantify percent ground cover of...
DNA damage and external lesions in brown bullheads (Ameiurus nebulosus) from contaminated habitats
X. Yang, J. Meier, L. Chang, M. Rowan, P. C. Baumann
2006, Environmental Toxicology and Chemistry (25) 3035-3038
The Comet assay was used to compare levels of DNA damage in brown bullheads (Ameiurus nebulosus) collected from three known contaminated locations, the Cuyahoga River (OH, USA), Ashtabula River (OH, USA; both tributaries to Lake Erie, USA), and Ashumet Pond (Cape Cod, MA, USA), with brown...
Association between wetland disturbance and biological attributes in floodplain wetlands
S. R. Chipps, D.E. Hubbard, K.B. Werlin, N.J. Haugerud, K.A. Powell, John Thompson, T. Johnson
2006, Wetlands (26) 497-508
We quantified the influence of agricultural activities on environmental and biological conditions of floodplain wetlands in the upper Missouri River basin. Seasonally-flooded wetlands were characterized as low impact (non-disturbed) or high impact (disturbed) based on local land use. Biological data collected from these wetlands were used to develop a wetland...
Spatial structure in the diet of imperial eagles Aquila heliaca in Kazakhstan
T.E. Katzner, E. A. Bragin, S.T. Knick, A.T. Smith
2006, Journal of Avian Biology (37) 594-600
We evaluated the relationship between spatial variability in prey and food habits of eastern imperial eagles Aquila heliaca at a 90,000 ha national nature reserve in north-central Kazakhstan. Eagle diet varied greatly within the population and the spatial structure of eagle diet within the population varied according to the scale...
Foreword: Understanding through modeling
C. Zheng, E. Poeter, M. Hill, J. Doherty
2006, Conference Paper, Ground Water
[No abstract available]...
Emplacement of the Kodiak batholith and slab-window migration
David W. Farris, Peter J. Haeussler, Richard Friedman, Scott R. Paterson, R. W. Saltus, Robert A. Ayuso
2006, Geological Society of America Bulletin (118) 1360-1376
The Kodiak batholith is one of the largest, most elongate intrusive bodies in the forearc Sanak-Baranof plutonic belt located in southern Alaska. This belt is interpreted to have formed during the subduction of an oceanic spreading center and the associated migration of a slab window. Individual plutons of the Kodiak...
Multidecadal climate variability of global lands and oceans
G.J. McCabe, M.A. Palecki
2006, International Journal of Climatology (26) 849-865
Principal components analysis (PCA) and singular value decomposition (SVD) are used to identify the primary modes of decadal and multidecadal variability in annual global Palmer Drought Severity Index (PDSI) values and sea-surface temperature (SSTs). The PDSI and SST data for 1925-2003 were detrended and smoothed (with a 10-year moving average)...
Satellite-derived, melt-season surface temperature of the Greenland Ice Sheet (2000-2005) and its relationship to mass balance
D.K. Hall, R.S. Williams Jr., K.A. Casey, N.E. DiGirolamo, Z. Wan
2006, Geophysical Research Letters (33)
Mean, clear-sky surface temperature of the Greenland Ice Sheet was measured for each melt season from 2000 to 2005 using Moderate-Resolution Imaging Spectroradiometer (MODIS)–derived land-surface temperature (LST) data-product maps. During the period of most-active melt, the mean, clear-sky surface temperature of the ice sheet was highest in 2002 (−8.29 ±...
Fifty-two years of pineapple-express storms across the West Coast of North America
M. D. Dettinger
2006, Report
No abstract available....
Earthquakes triggered by silent slip events on Kīlauea volcano, Hawaii
Paul Segall, Emily K. Desmarais, David Shelly, Asta Mikijus, Peter F. Cervelli
2006, Nature (442) 71-74
Slow-slip events, or ‘silent earthquakes’, have recently been discovered in a number of subduction zones including the Nankai trough1, 2, 3 in Japan, Cascadia4, 5, and Guerrero6 in Mexico, but the depths of these events have been difficult to determine from surface deformation measurements. Although it is assumed that...
Effectiveness of spinning-wing decoys varies among dabbling duck species and locations
Joshua T. Ackerman, J.M. Eadie, M.L. Szymanski, J.H. Caswell, Mark P. Vrtiska, Andrew H. Raedeke, J.M. Checkett, A. D. Afton, T.G. Moore, F. Dale Caswell, R. A. Walters, D.D. Humburg, J.L. Yee
2006, Journal of Wildlife Management (70) 799-804
Spinning-wing decoys are strong attractants to ducks and inc rease kill rates over traditional decoying methods. However, it is unknown whether all duck species are attracted similarly to spinning-wing decoys and whether the effectiveness of these decoys changes with latitude. We examined the effectiveness of spinning-wing decoys for 9 species...
Confirmation of a meteoritic component in impact-melt rocks of the Chesapeake Bay impact structure, Virginia, USA - Evidence from osmium isotopic and PGE systematics
S.R. Lee, J. Wright Horton Jr., R.J. Walker
2006, Meteoritics and Planetary Science (41) 819-833
The osmium isotope ratios and platinum-group element (PGE) concentrations of impact-melt rocks in the Chesapeake Bay impact structure were determined. The impact-melt rocks come from the cored part of a lower-crater section of suevitic crystalline-clast breccia in an 823 m scientific test hole over the central uplift at Cape Charles,...
Arctic-Yukon-Kuskokwim Salmon Research and Restoration Plan
2006, Report
The Arctic-Yukon-Kuskokwim Sustainable Salmon Initiative (AYK SSI) is an innovative partnership between public and private institutions which provides a forum for non-governmental organizations and state and federal agencies to cooperatively identify and address salmon research and restoration needs. The affected region encompasses over 40% of the State of Alaska; the...
Far-field effects of early Tertiary ridge subduction in Alaska
D. C. Bradley, R.M. Friedman, P.W. Layer, Peter J. Haeussler, A.B. Till, S. M. Roeske, Marti L. Miller
2006, Conference Paper, Geological Society of America Abstracts with Programs Specialty Meeting No 2:91
No abstract available. ...
Modeling habitat distribution from organism occurrences and environmental data: Case study using anemonefishes and their sea anemone hosts
J.M. Guinotte, J.D. Bartley, A. Iqbal, D.G. Fautin, R. W. Buddemeier
2006, Marine Ecology Progress Series (316) 269-283
We demonstrate the KGSMapper (Kansas Geological Survey Mapper), a straightforward, web-based biogeographic tool that uses environmental conditions of places where members of a taxon are known to occur to find other places containing suitable habitat for them. Using occurrence data for anemonefishes or their host sea anemones, and data for...
Radiometric ages of the Fire Clay tonstein [Pennsylvanian (Upper Carboniferous), Westphalian, Duckmantian]: A comparison of U-Pb zircon single-crystal ages and 40Ar/39Ar sanidine single-crystal plateau ages
P.C. Lyons, T.E. Krogh, Y.Y. Kwok, D.W. Davis, W.F. Outerbridge, H. T. Evans Jr.
2006, International Journal of Coal Geology (67) 259-266
The Fire Clay tonstein [Pennsylvanian (Upper Carboniferous), Westphalian Series, Duckmantian Stage]-a kaolinized, volcanic-ash deposit occurring in Kentucky, West Virginia, Tennessee, and Virginia-is the most widespread bed in the Middle Pennsylvanian of the central Appalachian basin, USA. A concordant single-crystal U-Pb zircon datum for this tonstein gives a 206Pb/238U age of...
Recovery of the black-footed ferret: Progress and continuing challenges- Proceedings of the Symposium on the Status of the Black-footed Ferret and Its Habitat, Fort Collins, Colorado, January 28-29, 2004
James E. Roelle, Brian J. Miller, Jerry L. Godbey, Dean E. Biggins, editor(s)
2006, Scientific Investigations Report 2005-5293
The black-footed ferret (Mustela nigripes) is a member of the weasel family (Mustelidae) and is closely related to the Siberian polecat (M. eversmannii) of Asian steppes and the European polecat (M. putorius). Compared to its relatives, the black-footed ferret is an extreme specialist, depending on the prairie dogs (Cynomys spp.)...
Calcite-graphite thermometry of the Franklin Marble, New Jersey Highlands
W.H. Peck, R.A. Volkert, M.T. Meredith, E.L. Rader
2006, Journal of Geology (114) 485-499
We present new stable-isotope data for the Mesoproterozoic Franklin Marble from outcrops along an 80-km traverse parallel to and across strike of the structural grain of the western New Jersey Highlands. Calcite and dolomite from marble have an average ??13C of 0.35??? ?? 0.73??? PDB (n = 46) and a...
