Evidence of decline for Bufo boreas and Rana luteiventris in and around the northern Great Basin
W. Wente, M. J. Adams, Christopher A. Pearl
2005, Alytes (22) 95-108
A method is described for the analysis of polychlorinated biphenyl (PCB) compounds in tissue samples. Cleanup by hexane-aceto-nitrile partitioning and Florisil column chromatography are performed on samples before oxidative treatment to convert DDE to DCBP. PCB components are then determined semi-quantitatively by TLC. No prior separation of PCB from chlorinated...
Distribution of pelagic forage fishes in relation to the oceanography of Glacier Bay
Mayumi L. Arimitsu, John F. Piatt, Marc D. Romano, David C. Douglas
2005, Book chapter, Proceedings of the Fourth Glacier Bay Science Symposium. U.S. Geological Survey Scientific Investigations Report 2007-5047, 246 p, 2004
Trends and variability in snowmelt runoff in the western United States
G.J. McCabe, M.P. Clark
2005, Journal of Hydrometeorology (6) 476-482
The timing of snowmelt runoff (SMR) for 84 rivers in the western United States is examined to understand the character of SMR variability and the climate processes that may be driving changes in SMR timing. Results indicate that the timing of SMR for many rivers in the western United States...
Mercury concentrations in water from an unconfined aquifer system, New Jersey coastal plain
J. L. Barringer, Zoltan Szabo, L. J. Kauffman, T. H. Barringer, P. E. Stackelberg, T. Ivahnenko, S. Rajagopalan, D. P. Krabbenhoft
2005, Science of the Total Environment (346) 169-183
Concentrations of total mercury (Hg) from 2 μg/L (the USEPA maximum contaminant level) to 72 μg/L in water from about 600 domestic wells in residential parts of eight counties in southern New Jersey have been reported by State and county agencies. The wells draw water from the areally extensive (7770...
Estimating hydrodynamic roughness in a wave-dominated environment with a high-resolution acoustic Doppler profiler
J.R. Lacy, C. R. Sherwood, D.J. Wilson, T.A. Chisholm, G.R. Gelfenbaum
2005, Journal of Geophysical Research C: Oceans (110) 1-15
Hydrodynamic roughness is a critical parameter for characterizing bottom drag in boundary layers, and it varies both spatially and temporally due to variation in grain size, bedforms, and saltating sediment. In this paper we investigate temporal variability in hydrodynamic roughness using velocity profiles in the bottom boundary layer measured with...
Ca cycling and isotopic fluxes in forested ecosystems in Hawaii
B.A. Wiegand, O.A. Chadwick, P.M. Vitousek, J. L. Wooden
2005, Geophysical Research Letters (32) 1-4
Biogeochemical processes fractionate Ca isotopes in plants and soils along a 4 million year developmental sequence in the Hawaiian Islands. We observed that plants preferentially take up 40Ca relative to 44Ca, and that biological fractionation and changes in the relative contributions from volcanic and marine sources produce a significant increase...
Teleseismic body waves from dynamically rupturing shallow thrust faults: Are they opaque for surface-reflected phases?
D.E. Smith, Brad T. Aagaard, T. H. Heaton
2005, Bulletin of the Seismological Society of America (95) 800-817
We investigate whether a shallow-dipping thrust fault is prone to waveslip interactions via surface-reflected waves affecting the dynamic slip. If so, can these interactions create faults that are opaque to radiated energy? Furthermore, in this case of a shallow-dipping thrust fault, can incorrectly assuming a transparent fault while using dislocation...
Paleoproterozoic Mojave Province in northwestern Mexico? Isotopic and U-Pb zircon geochronologic studies of Precambrian and Cambrian crystalline and sedimentary rocks, Caborca, Sonora
G. Lang Farmer, S. A. Bowring, J. Matzel, G.E. Maldonado, C. Fedo, J. Wooden
2005, Special Paper of the Geological Society of America (393) 183-198
Whole-rock Nd isotopic data and U-Pb zircon geochronology from Precambrian crystalline rocks in the Caborca area, northern Sonora, reveal that these rocks are most likely a segment of the Paleoproterozoic Mojave province. Supporting this conclusion are the observations that paragneiss from the > or =1.75 Ga Bamori Complex has a...
Late Pleistocene granodiorite source for recycled zircon and phenocrysts in rhyodacite lava at Crater Lake, Oregon
C. R. Bacon, J. B. Lowenstern
2005, Earth and Planetary Science Letters (233) 277-293
Rhyodacite tephra and three lavas erupted ∼27 ka, interpreted to be early leaks from the climactic magma chamber of Mount Mazama, contain ubiquitous resorbed crystals (antecrysts) that were recycled from young granodiorite and related plutonic rocks of the same magmatic system. The shallow composite pluton is represented by blocks ejected...
Albino mutation rates in red mangroves (Rhizophora mangle L.) as a bioassay of contamination history in Tampa Bay, Florida, USA
C.E. Proffitt, S.E. Travis
2005, Wetlands (25) 326-334
We assessed the sensitivity of a viviparous estuarine tree species, Rhizophora mangle, to historic sublethal mutagenic stress across a fine spatial scale by comparing the frequency of trees producing albino propagules in historically contaminated (n=4) and uncontaminated (n=11) forests in Tampa Bay, Florida, USA. Data from uncontaminated forests were used...
Tsunami history of an Oregon coastal lake reveals a 4600 yr record of great earthquakes on the Cascadia subduction zone
H.M. Kelsey, A.R. Nelson, E. Hemphill-Haley, Robert C. Witter
2005, Geological Society of America Bulletin (117) 1009-1032
Bradley Lake, on the southern Oregon coastal plain, records local tsunamis and seismic shaking on the Cascadia subduction zone over the last 7000 yr. Thirteen marine incursions delivered landward-thinning sheets of sand to the lake from nearshore, beach, and dune environments to the west. Following each incursion, a slug of...
Calculating mercury loading to the tidal Hudson River, New York, using rating curve and surrogate methodologies
G. R. Wall, H. H. Ingleston, S. Litten
2005, Water, Air, & Soil Pollution (165) 233-248
Total mercury (THg) load in rivers is often calculated from a site-specific "rating-curve" based on the relation between THg concentration and river discharge along with a continuous record of river discharge. However, there is no physical explanation as to why river discharge should consistently predict THg or any other suspended...
Strong effects of predation by fishes on an invasive macroinvertebrate in a large floodplain river
Michelle R. Bartsch, Lynn Bartsch, Steve Gutreuter
2005, Journal of the North American Benthological Society (24) 168-177
We assessed the effects of fish predation on zebra mussels (Dreissena polymorpha) in Navigation Pool 8 of the Upper Mississippi River from 13 May to 5 October, 1998. Concrete-block samplers were deployed at 18 randomly chosen sites in the main-channel border, with 6 sites in the upper, middle, and lower...
Effects of suburban development on runoff generation in the Croton River basin, New York, USA
Douglas A. Burns, T. Vitvar, J. McDonnell, J. Hassett, J. Duncan, Carol Kendall
2005, Journal of Hydrology (311) 266-281
The effects of impervious area, septic leach-field effluent, and a riparian wetland on runoff generation were studied in three small (0.38–0.56 km2) headwater catchments that represent a range of suburban development (high density residential, medium density residential, and undeveloped) within the Croton River basin, 70 km north of New York City. Precipitation, stream...
The May 2003 eruption of Anatahan volcano, Mariana Islands: Geochemical evolution of a silicic island-arc volcano
J.A. Wade, T. Plank, R. J. Stern, D.L. Tollstrup, J.B. Gill, J. C. O’Leary, J.M. Eiler, R. B. Moore, J.D. Woodhead, F. Trusdell, T.P. Fischer, David R. Hilton
2005, Journal of Volcanology and Geothermal Research (146) 139-170
The first historical eruption of Anatahan volcano began on May 10, 2003. Samples of tephra from early in the eruption were analyzed for major and trace elements, and Sr, Nd, Pb, Hf, and O isotopic compositions. The compositions of these tephras are compared with those of prehistoric samples of basalt...
Seasonal exposures to triazine and other pesticides in surface waters in the western Highveld corn-production region in South Africa
L.H. Du Preez, P.J. Jansen Van Rensburg, A.M. Jooste, J.A. Carr, J. P. Giesy, T. S. Gross, R.J. Kendall, E.E. Smith, G. Van Der Kraak, K.R. Solomon
2005, Environmental Pollution (135) 131-141
The objective of this study was to characterize concentrations of atrazine, terbuthylazine, and other pesticides in amphibian habitats in surface waters of a corn-production area of the western Highveld region (North-West Province) of South Africa. The study was conducted from November 2001 to June 2002, coinciding with the corn-production season....
Evidence for magmatic evolution and diversity on Mars from infrared observations
P. R. Christensen, H.Y. McSween Jr., J. L. Bandfield, S. W. Ruff, A.D. Rogers, V.E. Hamilton, N. Gorelick, M.B. Wyatt, B. M. Jakosky, H. H. Kieffer, M. C. Malin, J.E. Moersch
2005, Nature (436) 504-509
Compositional mapping of Mars at the 100-metre scale with the Mars Odyssey Thermal Emission Imaging System (THEMIS) has revealed a wide diversity of igneous materials. Volcanic evolution produced compositions from low-silica basalts to high-silica dacite in the Syrtis Major caldera. The existence of dacite demonstrates that highly evolved lavas have...
Mineral resource of the month: boron
Phyllis A. Lyday
2005, Geotimes (2005) 45-45
What does boron have to do with baseball, apple pie, motherhood and Chevrolet? Boron minerals and chemicals are used in the tanning of leather baseballs and gloves; in micro-fertilizer to grow apples and in the glass and enamels of bakewares to cook apple pie; in boron detergents for soaking baby...
High resolution mapping and classification of oyster habitats in nearshore Louisiana using sidescan sonar
Y.C. Allen, C.A. Wilson, H.H. Roberts, J. Supan
2005, Estuaries (28) 435-446
Sidescan sonar holds great promise as a tool to quantitatively depict the distribution and extent of benthic habitats in Louisiana's turbid estuaries. In this study, we describe an effective protocol for acoustic sampling in this environment. We also compared three methods of classification in detail: mean-based thresholding, supervised, and unsupervised...
Dating the growth of oceanic crust at a slow-spreading ridge
J.J. Schwartz, Barbara E. John, Michael J. Cheadle, E.A. Miranda, Craig B. Grimes, J. L. Wooden, H.J.B. Dick
2005, Science (310) 654-657
Nineteen uranium-lead zircon ages of lower crustal gabbros from Atlantis Bank, Southwest Indian Ridge, constrain the growth and construction of oceanic crust at this slow-spreading midocean ridge. Approximately 75% of the gabbros accreted within error of the predicted seafloor magnetic age, whereas ???25% are significantly older. These anomalously old samples...
Effects of flooding regime and seedling treatment on early survival and growth of nuttall oak
V.R. Burkett, R.O. Draugelis-Dale, H.M. Williams, S.H. Schoenholtz
2005, Restoration Ecology (13) 471-479
Effects of flooding on survival and growth of three different types of Nuttall oak (Quercus texana Buckl.) seedlings were observed at the end of third and fifth growing seasons at Yazoo National Wildlife Refuge, Mississippi, U.S.A. Three types of seedlings were planted in January 1995 in a split‐plot design, with four...
Estimating sediment budgets at the interface between rivers and estuaries with application to the Sacramento-San Joaquin River Delta
Scott Wright, David H. Schoellhamer
2005, Water Resources Research (41) 1-17
Where rivers encounter estuaries, a transition zone develops where riverine and tidal processes both affect sediment transport processes. One such transition zone is the Sacramento‐San Joaquin River Delta, a large, complex system where several rivers meet to form an estuary (San Francisco Bay). Herein we present the results of a...
Breeding bird assemblages associated with stages of forest succession in large river floodplains
Melinda G. Knutson, Laura E. McColl, Susan A. Suarez
2005, Natural Areas Journal (25) 55-70
Floodplain forests rival all other habitat types in bird density and diversity. However, major successional changes are predicted for floodplain forests along the Mississippi River in the coming decades; young forests may replace the existing mature silver maple (Acer saccharinum L.) forests in some areas. We wanted to assess how...
Modelling habitat associations with fingernail clam (Family: Sphaeriidae) counts at multiple spatial scales using hierarchical count models
Brian R. Gray, Roger J. Haro, James T. Rogala, Jennifer S. Sauer
2005, Freshwater Biology (50) 715-729
1. Macroinvertebrate count data often exhibit nested or hierarchical structure. Examples include multiple measurements along each of a set of streams, and multiple synoptic measurements from each of a set of ponds. With data exhibiting hierarchical structure, outcomes at both sampling (e.g. within stream) and aggregated (e.g. stream) scales are...
Evaluation on determination of iodine in coal by energy dispersive X-ray fluorescence
B. Wang, J.C. Jackson, C. Palmer, B. Zheng, R. B. Finkelman
2005, Geochemical Journal (39) 391-394
A quick and inexpensive method of relative high iodine determination from coal samples was evaluated. Energy dispersive X-ray fluorescence (EDXRF) provided a detection limit of about 14 ppm (3 times of standard deviations of the blank sample), without any complex sample preparation. An analytical relative standard deviation of 16% was...
