Water quality of the Crescent River basin, Lake Clark National Park and Preserve, Alaska, 2003-2004
Timothy P. Brabets, Robert T. Ourso
2006, Scientific Investigations Report 2006-5151
The U.S. Geological Survey and the National Park Service conducted a water-quality investigation of the Crescent River Basin in Lake Clark National Park and Preserve from May 2003 through September 2004. The Crescent River Basin was studied because it has a productive sockeye salmon run that is important to the...
Shallow stratigraphy and sedimentation history during high-frequency sea-level changes on the central California shelf
E. E. Grossman, S.L. Eittreim, M.E. Field, F. L. Wong
2006, Continental Shelf Research (26) 1217-1239
Analyses of high-resolution seismic-reflection data and sediment cores indicate that an extensive sediment deposit on the central California continental shelf is comprised of several late-Pleistocene to Holocene age facies. Offshore of the littoral zone, in water depths of 30-90 m, a 3-6 m thick veneer of fine sediment referred to...
Preferential flow estimates to an agricultural tile drain with implications for glyphosate transport
W.W. Stone, J.T. Wilson
2006, Journal of Environmental Quality (35) 1825-1835
Agricultural subsurface drains, commonly referred to as tile drains, are potentially significant pathways for the movement of fertilizers and pesticides to streams and ditches in much of the Midwest. Preferential flow in the unsaturated zone provides a route for water and solutes to bypass the soil matrix and reach tile...
Time series and recurrence interval models to predict the vulnerability of streams to episodic acidification in Shenandoah National Park, Virginia
Frank A. Deviney, Karen C. Rice, George M. Hornberger
2006, Water Resources Research (42)
Acid rain affects headwater streams by temporarily reducing the acid‐neutralizing capacity (ANC) of the water, a process termed episodic acidification. The increase in acidic components in stream water can have deleterious effects on the aquatic biota. Although acidic deposition is uniform across Shenandoah National Park (SNP) in north central Virginia,...
Multiphase, multicomponent parameter estimation for liquid and vapor fluxes in deep arid systems using hydrologic data and natural environmental tracers
Edward M. Kwicklis, Andrew V. Wolfsberg, Philip H. Stauffer, Michelle Ann Walvoord, Michael J. Sully
2006, Vadose Zone Journal (5) 934-950
Multiphase, multicomponent numerical models of long-term unsaturated-zone liquid and vapor movement were created for a thick alluvial basin at the Nevada Test Site to predict present-day liquid and vapor fluxes. The numerical models are based on recently developed conceptual models of unsaturated-zone moisture movement in thick alluvium that explain present-day...
Modeling the probability of arsenic in groundwater in New England as a tool for exposure assessment
J. D. Ayotte, B. T. Nolan, J.R. Nuckols, K.P. Cantor, G.R. Robinson Jr., D. Baris, L. Hayes, M. Karagas, W. Bress, D.T. Silverman, J.H. Lubin
2006, Environmental Science & Technology (40) 3578-3585
We developed a process-based model to predict the probability of arsenic exceeding 5 ??g/L in drinking water wells in New England bedrock aquifers. The model is being used for exposure assessment in an epidemiologic study of bladder cancer. One important study hypothesis that may explain increased bladder cancer risk is...
Evaluating the relative contributions of hydroperiod and soil fertility on growth of south Florida mangroves
K. W. Krauss, T.W. Doyle, R.R. Twilley, V. H. Rivera-Monroy, J.K. Sullivan
2006, Hydrobiologia (569) 311-324
Low and high water periods create contrasting challenges for trees inhabiting periodically flooded wetlands. Low to moderate flood durations and frequencies may bring nutrient subsidies, while greater hydroperiods can be energetically stressful because of oxygen deficiency. We tested the hypothesis that hydroperiod affects the growth of mangrove seedlings and saplings...
Diurnal time-activity budgets of redheads (Aythya americana) wintering in seagrass beds and coastal ponds in Louisiana and Texas
T.C. Michot, M.C. Woodin, S.E. Adair, E.B. Moser
2006, Hydrobiologia (567) 113-128
Diurnal time-activity budgets were determined for wintering redheads (Aythya americana) from estuarine seagrass beds in Louisiana (Chandeleur Sound) and Texas (Laguna Madre) and from ponds adjacent to the Laguna Madre. Activities differed (p<0.0001) by location, month, and diurnal time period. Resting and feeding were the most...
Potential inhibitors to recovery of Acropora palmata populations in St. John, US Virgin Islands
R. Grober-Dunsmore, V. Bonito, T.K. Frazer
2006, Marine Ecology Progress Series (321) 123-132
Populations of Acropora palmata in the Caribbean were decimated in the 1970s and 1980s, with little apparent signs of recovery until the late 1990s. Here, we document an increase in A. palmata colonies between 2001 and 2003 at 8 of 11 monitoring sites in waters adjacent to the island of...
River size and fish assemblages in southwestern South Dakota
C.W. Hoagstrom, S.S. Wall, J.P. Duehr, C. R. Berry Jr.
2006, Great Plains Research (16) 117-126
We studied relations between river size, fish species diversity, and fish species composition along four major rivers in the Great Plains of southwestern South Dakota to assess patterns of species diversity and composition. We expected diversity to increase with river size and fish composition to change via species addition downstream....
Two years at Meridiani Planum: Results from the Opportunity Rover
S. W. Squyres, A.H. Knoll, R. E. Arvidson, B. C. Clark, J.P. Grotzinger, B.L. Jolliff, S. M. McLennan, N. Tosca, J.F. Bell III, W. M. Calvin, W. H. Farrand, T.D. Glotch, M.P. Golombek, Kenneth E. Herkenhoff, J. R. Johnson, G. Klingelhofer, H.Y. McSween, A. S. Yen
2006, Science (313) 1403-1407
The Mars Exploration Rover Opportunity has spent more than 2 years exploring Meridiani Planum, traveling ∼8 kilometers and detecting features that reveal ancient environmental conditions. These include well-developed festoon (trough) cross-lamination formed in flowing liquid water, strata with smaller and more abundant hematite-rich concretions than those seen previously, possible relict...
Peak flow responses to landscape disturbances caused by the cataclysmic 1980 eruption of Mount St. Helens, Washington
Jon J. Major, Linda E. Mark
2006, Geological Society of America Bulletin (118) 938-958
Years of discharge measurements that precede and follow the cataclysmic 1980 eruption of Mount St. Helens, Washington, provide an exceptional opportunity to examine the responses of peak flows to abrupt, widespread, devastating landscape disturbance. Multiple basins surrounding Mount St. Helens (300–1300 km2 drainage areas) were variously disturbed by: (1) a debris...
Potential effects of recurrent low oxygen conditions on the Illinois Cave amphipod
S.V. Panno, Keith C. Hackley, W.R. Kelly, H.-H. Hwang, F.M. Wilhelm, S.J. Taylor, B.J. Stiff
2006, Journal of Cave and Karst Studies (68) 55-63
The caves of Illinois' sinkhole plain are the sole habitat of the Illinois Cave amphipod (Gammarus acherondytes), a federally endangered species. The sinkhole plain is a hydrologically-connected sequence of karstified limestone that constitutes an extensive karst aquifer which serves as an important source of potable water for area residents. During...
Headward growth of chasmata by volatile outbursts, collapse, and drainage: Evidence from ganges chaos, Mars
J.A.P. Rodriguez, J. Kargel, D.A. Crown, L. F. Bleamaster III, K. L. Tanaka, V. Baker, H. Miyamoto, J. M. Dohm, S. Sasaki, G. Komatsu
2006, Geophysical Research Letters (33)
The nature and significance of collapse processes in Capri, Eos, and Ganges Chasmata remain poorly understood. Using Ganges Chasma as a type locality, these chasmata are interpreted to be the result of clustering and assimilation of multiple chaotic terrains, which primarily formed by localized depressurization-induced or thermally-triggered dissociation of buried...
Erosion rates at the Mars Exploration Rover landing sites and long-term climate change on Mars
M.P. Golombek, J. A. Grant, L.S. Crumpler, R. Greeley, R. E. Arvidson, J.F. Bell III, C.M. Weitz, R.J. Sullivan, P. R. Christensen, L.A. Soderblom, S. W. Squyres
2006, Journal of Geophysical Research E: Planets (111)
Erosion rates derived from the Gusev cratered plains and the erosion of weak sulfates by saltating sand at Meridiani Planum are so slow that they argue that the present dry and desiccating environment has persisted since the Early Hesperian. In contrast, sedimentary rocks at Meridiani formed in the presence of...
Gimme shelter: The importance of crevices to some fish species inhabiting a deeper-water rocky outcrop in Southern California
M.S. Love, D.M. Schroeder, B. Lenarz, G.R. Cochrane
2006, California Cooperative Oceanic Fisheries Investigations Reports (47) 119-126
Federal law governing fisheries management recognizes the role habitat plays in structuring fish assemblages and achieving sustainable fisheries. However, in most instances it is not known which aspects of habitat are important to the lives of fish species. In 2004, we examined the importance of sheltering sites (crevices) to fishes...
Uranium-series constraints on subrepository water flow at yucca mountain, nevada
L.A. Neymark, S.J. Chipera, J.B. Paces, D. T. Vaniman
2006, Conference Paper, Proceedings of the 11th International High Level Radioactive Waste Management Conference, IHLRWM
Mineral abundances and whole-rock chemical and uranium-series isotopic compositions were measured in unfractured and rubble core samples from borehole USW SD-9 in the same layers of variably zeolitized tuffs that underlie the proposed nuclear waste repository at Yucca Mountain, Nevada. Uranium concentrations and isotopic compositions also were measured in pore...
Large-scale movements and habitat characteristics of king eiders throughout the nonbreeding period
Laura M. Phillips, A.N. Powell, E.A. Rexstad
2006, Condor (108) 887-900
King Eiders (Somateria spectabilis) breeding in western Canada and Alaska molt wing feathers and spend the winter in remote areas of the Bering Sea, precluding direct observation. To characterize timing of migration and habitat used by King Eiders during the nonbreeding period, we collected location data for 60 individuals (27...
Seasonal and spatial patterns of metals at a restored copper mine site. I. Stream copper and zinc
D.G. Bambic, Charles N. Alpers, P.G. Green, E. Fanelli, W.K. Silk
2006, Environmental Pollution (144) 774-782
Seasonal and spatial variations in metal concentrations and pH were found in a stream at a restored copper mine site located near a massive sulfide deposit in the Foothill copper-zinc belt of the Sierra Nevada, California. At the mouth of the stream, copper concentrations increased and pH decreased with increased...
Trachemys scripta elegans (Red-eared Slider). Reproduction
Matthew P. Bettelheim, R. Bruce Bury, Laura C. Patterson, Glen M. Lubcke
2006, Herpetological Review (37) 459-460
The natural range of Trachemys scripta elegans is centered in the south-central United States, from Illinois to the Gulf of Mexico. Because of its prominence in the international pet trade, the species now can be found over much of the United States, and its introduction has been documented throughout the...
Michigan Water Year 2005
S. P. Blumer, C.R. Whited, J.M. Ellis, R. J. Minnerick, R.L. LeuVoy
2006, Water Resources Data MI-05-1
This volume of the annual hydrologic data report of Michigan is one of a series of annual reports that document hydrologic data gathered from the U.S. Geological Survey's surface- and ground-water data-collection networks in each state, Puerto Rico, and the Trust Territories. These records of streamflow, ground-water levels, and quality...
Reconstructing depositional processes and history from reservoir stratigraphy: Englebright Lake, Yuba River, northern California
N.P. Snyder, S.A. Wright, Charles N. Alpers, L. E. Flint, C. W. Holmes, D. M. Rubin
2006, Journal of Geophysical Research F: Earth Surface (111)
Reservoirs provide the opportunity to link watershed history with its stratigraphic record. We analyze sediment cores from a northern California reservoir in the context of hydrologic history, watershed management, and depositional processes. Observations of recent depositional patterns, sediment‐transport calculations, and 137Cs geochronology support a conceptual model in which the reservoir delta...
Emerging concepts for management of river ecosystems and challenges to applied integration of physical and biological sciences in the Pacific Northwest, USA
Bruce Rieman, Jason B. Dunham, James Clayton
2006, International Journal of River Basin Management (4) 85-97
Integration of biological and physical concepts is necessary to understand and conserve the ecological integrity of river systems. Past attempts at integration have often focused at relatively small scales and on mechanistic models that may not capture the complexity of natural systems leaving substantial uncertainty about ecological responses to management...
Evidence for ground-water stratification near Yucca Mountain, Nevada
K. Futa, B.D. Marshall, Z. E. Peterman
2006, Conference Paper, Proceedings of the 11th International High Level Radioactive Waste Management Conference, IHLRWM
Major- and trace-element concentrations and strontium isotope ratios (strontium-87/strontium-86) in samples of ground water potentially can be useful in delineating flow paths in the complex ground-water system in the vicinity of Yucca Mountain, Nevada. Water samples were collected from boreholes to characterize the lateral and vertical variability in the composition...
Geologic impacts of the 2004 Indian ocean tsunami on Indonesia, Sri Lanka, and the Maldives
B. M. Richmond, B. E. Jaffe, G. Gelfenbaum, R.A. Morton
2006, Conference Paper, Zeitschrift fur Geomorphologie, Supplementband
The December 26, 2004 Indian Ocean tsunami was generated by a large submarine earthquake (magnitude ???9.1) with an epicenter located under the seafloor in the eastern Indian Ocean near northern Sumatra, Indonesia. The resulting tsunami was measured globally and had significant geologic impacts throughout the Indian Ocean basin. Observations of...
