Reduction of garbage in the diet of nonbreeding glaucous gulls corresponding to a change in waste management
Emily L. Weiser, Abby N. Powell
2011, Arctic (64) 220-226
Glaucous gulls (Larus hyperboreus) are major predators in the Arctic and may benefit from human development. We studied use of garbage by glaucous gulls in Barrow, Alaska, in 2007, when municipal waste was disposed of in a landfill, and in 2008, when it was incinerated. In both years, diet samples...
Enhanced transpiration by riparian buffer trees in response to advection in a humid temperate agricultural landscape
V. Hernandez-Santana, H. Asbjornsen, T. Sauer, T. Isenhart, K. Schilling, Ronald Schultz
2011, Forest Ecology and Management (261) 1415-1427
Riparian buffers are designed as management practices to increase infiltration and reduce surface runoff and transport of sediment and nonpoint source pollutants from crop fields to adjacent streams. Achieving these ecosystem service goals depends, in part, on their ability to remove water from the soil via transpiration. In these systems,...
Evaluating the effect of predators on white-tailed deer: Movement and diet of coyotes
M.M. Turner, A.P. Rockhill, C.S. Deperno, J.A. Jenks, R. W. Klaver, A.R. Jarding, T.W. Grovenburg, K. H. Pollock
2011, Journal of Wildlife Management (75) 905-912
Coyotes (Canis latrans) may affect adult and neonate white-tailed deer (Odocoileus virginianus) survival and have been implicated as a contributor to the decline of deer populations. Additionally, coyote diet composition is influenced by prey availability, season, and region. Because coyote movement and diet vary by region, local data are important...
Evidence for predatory control of the invasive round goby
C.P. Madenjian, M.A. Stapanian, L.D. Witzel, D.W. Einhouse, S.A. Pothoven, H.L. Whitford
2011, Biological Invasions (13) 987-1002
We coupled bioenergetics modeling with bottom trawl survey results to evaluate the capacity of piscivorous fish in eastern Lake Erie to exert predatory control of the invading population of round goby Neogobius melanostomus. In the offshore (>20 m deep) waters of eastern Lake Erie, burbot Lota lota is a native...
Analysis of passive surface-wave noise in surface microseismic data and its implications
F. Forghani-Arani, M. Willis, S. Haines, M. Batzle, M. Davidson
2011, SEG Technical Program Expanded Abstracts (30) 1493-1498
Tight gas reservoirs are projected to be a major portion of future energy resources. Because of their low permeability, hydraulic fracturing of these reservoirs is required to improve the permeability and reservoir productivity. Passive seismic monitoring is one of the few tools that can be used to characterize the changes...
Organic geochemical investigation and coal-bed methane characteristics of the Guasare coals (Paso Diablo mine, western Venezuela)
K. Quintero, M. Martinez, P. Hackley, G. Marquez, G. Garban, I. Esteves, M. Escobar
2011, Energy Sources, Part A: Recovery, Utilization and Environmental Effects (33) 959-971
The aim of this work was to carry out a geochemical study of channel samples collected from six coal beds in the Marcelina Formation (Zulia State, western Venezuela) and to determine experimentally the gas content of the coals from the Paso Diablo mine. Organic geochemical analyses by gas chromatography-mass spectrometry...
Trench infiltration for managed aquifer recharge to permeable bedrock
V.M. Heilweil, D.E. Watt
2011, Hydrological Processes (25) 141-151
Managed aquifer recharge to permeable bedrock is increasingly being utilized to enhance resources and maintain sustainable groundwater development practices. One such target is the Navajo Sandstone, an extensive regional aquifer located throughout the Colorado Plateau of the western United States. Spreading-basin and bank-filtration projects along the sandstone outcrop's western edge...
Recovery of coded wire tags at a caspian tern colony in San Francisco Bay: A technique to evaluate impacts of avian predation on juvenile salmonids
A.F. Evans, D.D. Roby, K. Collis, B.M. Cramer, J.A. Sheggeby, L.J. Adrean, D.S. Battaglia, Donald E. Lyons
2011, North American Journal of Fisheries Management (31) 79-87
We recovered coded wire tags (CWTs) from a colony of Caspian terns Hydroprogne caspia on Brooks Island in San Francisco Bay, California, to evaluate predation on juvenile salmonids originating from the Sacramento and San Joaquin rivers. Subsamples of colony substrate representing 11.7% of the nesting habitat used by the terns...
What do we know about metal recycling rates?
T.E. Graedel, J. Allwood, J.-P. Birat, M. Buchert, C. Hageluken, B.K. Reck, S.F. Sibley, G. Sonnemann
2011, Journal of Industrial Ecology (15) 355-366
The recycling of metals is widely viewed as a fruitful sustainability strategy, but little information is available on the degree to which recycling is actually taking place. This article provides an overview on the current knowledge of recycling rates for 60 metals. We propose various recycling metrics, discuss relevant aspects...
Historical influence of soil and water management on sediment and carbon budgets in the United States
E.T. Sundquist, K.V. Ackerman, R.F. Stallard, N.B. Bliss
2011, Applied Geochemistry (26)
[No abstract available]...
A comparison of recharge rates in aquifers of the United States based on groundwater-age data
P.B. McMahon, Niel Plummer, J.K. Böhlke, S.D. Shapiro, S.R. Hinkle
2011, Hydrogeology Journal (19) 779-800
An overview is presented of existing groundwater-age data and their implications for assessing rates and timescales of recharge in selected unconfined aquifer systems of the United States. Apparent age distributions in aquifers determined from chlorofluorocarbon, sulfur hexafluoride, tritium/helium-3, and radiocarbon measurements from 565 wells in 45 networks were used to...
Geochemical and isotopic study of soils and waters from an Italian contaminated site: Agro Aversano (Campania)
M.A. Bove, R. A. Ayuso, B. de Vivo, A. Lima, S. Albanese
2011, Journal of Geochemical Exploration (109) 38-50
Lead isotope applications have been widely used in recent years in environmental studies conducted on different kinds of sampled media. In the present paper, Pb isotope ratios have been used to determine the sources of metal pollution in soils and waters in the Agro Aversano area. During three different sampling...
Hyperkyphosis in longnose gar (Lepisosteus osseus) of North Central Texas
Samuel W. Kelley
2011, Western North American Naturalist (71) 121-126
Two mature female longnose gar (Lepisosteus osseus) exhibiting severe hyperkyphotic spinal deformities were captured during the 2010 spring spawn at Lake Arrowhead, Clay County, Texas. Yet, despite their deformities and impaired motility, both longnose gar were in overall good condition. Hyperkyphosis in both longnose gar resulted from fused trunk vertebrae...
Radionuclides, trace elements, and radium residence in phosphogypsum of Jordan
R. A. Zielinski, M. S. Al-Hwaiti, J. R. Budahn, J. F. Ranville
2011, Environmental Geochemistry and Health (33) 149-165
Voluminous stockpiles of phosphogypsum (PG) generated during the wet process production of phosphoric acid are stored at many sites around the world and pose problems for their safe storage, disposal, or utilization. A major concern is the elevated concentration of long-lived 226Ra (half-life = 1,600 years) inherited from the processed...
Stress transfer among en echelon and opposing thrusts and tear faults: Triggering caused by the 2003 Mw = 6.9 Zemmouri, Algeria, earthquake
J. Lin, R.S. Stein, M. Meghraoui, S. Toda, A. Ayadi, C. Dorbath, S. Belabbes
2011, Journal of Geophysical Research B: Solid Earth (116)
The essential features of stress interaction among earthquakes on en echelon thrusts and tear faults were investigated, first through idealized examples and then by study of thrust faulting in Algeria. We calculated coseismic stress changes caused by the 2003 Mw = 6.9 Zemmouri earthquake, finding that a large majority of...
Rethinking hyporheic flow and transient storage to advance understanding of stream-catchment connections
Kenneth E. Bencala, M.N. Gooseff, Briant A. Kimball
2011, Water Resources Research (47)
Although surface water and groundwater are increasingly referred to as one resource, there remain environmental and ecosystem needs to study the 10 m to 1 km reach scale as one hydrologic system. Streams gain and lose water over a range of spatial and temporal scales. Large spatial scales (kilometers) have...
Microstructure and crystallographic preferred orientation of polycrystalline microgarnet aggregates developed during progressive creep, recovery, and grain boundary sliding
M.A. Massey, D.J. Prior, D.P. Moecher
2011, Journal of Structural Geology (33) 713-730
Optical microscopy, electron probe microanalysis, and electron backscatter diffraction methods have been used to examine a broad range of garnet microstructures within a high strain zone that marks the western margin of a major transpression zone in the southern New England Appalachians. Garnet accommodated variable states of finite strain, expressed...
On the hydrologic adjustment of climate-model projections: The potential pitfall of potential evapotranspiration
P. C. D. Milly, K.A. Dunne
2011, Earth Interactions (15) 1-14
Hydrologic models often are applied to adjust projections of hydroclimatic change that come from climate models. Such adjustment includes climate-bias correction, spatial refinement ("downscaling"), and consideration of the roles of hydrologic processes that were neglected in the climate model. Described herein is a quantitative analysis of the effects of hydrologic...
Evaluation of single and two-stage adaptive sampling designs for estimation of density and abundance of freshwater mussels in a large river
D. R. Smith, J. T. Rogala, B. R. Gray, S. J. Zigler, T.J. Newton
2011, River Research and Applications (27) 122-133
Reliable estimates of abundance are needed to assess consequences of proposed habitat restoration and enhancement projects on freshwater mussels in the Upper Mississippi River (UMR). Although there is general guidance on sampling techniques for population assessment of freshwater mussels, the actual performance of sampling designs can depend critically on the...
Recovering from the ShakeOut earthquake
Anne Wein, Laurie Johnson, Richard Bernknopf
2011, Earthquake Spectra (27) 521-538
Recovery from an earthquake like the M7.8 ShakeOut Scenario will be a major endeavor taking many years to complete. Hundreds of Southern California municipalities will be affected; most lack recovery plans or previous disaster experience. To support recovery planning this paper 1) extends the regional ShakeOut Scenario analysis into the...
Home range dynamics, habitat selection, and survival of Greater Roadrunners
S.W. Kelley, D. Ransom Jr., J.A. Butcher, G.G. Schulz, B.W. Surber, W.E. Pinchak, C.A. Santamaria, L.A. Hurtado
2011, Journal of Field Ornithology (82) 165-174
Greater Roadrunners (Geococcyx californianus) are common, poorly studied birds of arid and semi-arid ecosystems in the southwestern United States. Conservation of this avian predator requires a detailed understanding of their movements and spatial requirements that is currently lacking. From 2006 to 2009, we quantified home-range and core area sizes and...
Evaluating the growth potential of sea lampreys (Petromyzon marinus) feeding on siscowet lake trout (Salvelinus namaycush) in Lake Superior
E.K. Moody, B.C. Weidel, T.D. Ahrenstorff, W.P. Mattes, J.F. Kitchell
2011, Journal of Great Lakes Research (37) 343-348
Differences in the preferred thermal habitat of Lake Superior lake trout morphotypes create alternative growth scenarios for parasitic sea lamprey (Petromyzon marinus) attached to lake trout hosts. Siscowet lake trout (Salvelinus namaycush) inhabit deep, consistently cold water (4–6 °C) and are more abundant than lean lake trout (Salvelinus namaycush) which...
High-frequency filtering of strong-motion records
J. Douglas, D.M. Boore
2011, Bulletin of Earthquake Engineering (9) 395-409
The influence of noise in strong-motion records is most problematic at low and high frequencies where the signal to noise ratio is commonly low compared to that in the mid-spectrum. The impact of low-frequency noise (<1 Hz) on strong-motion intensity parameters such as ground velocities, displacements and response spectral ordinates...
Users as essential contributors to spatial cyberinfrastructures
B.S. Poore
2011, Conference Paper, Proceedings of the National Academy of Sciences of the United States of America
Current accounts of spatial cyberinfrastructure development tend to overemphasize technologies to the neglect of critical social and cultural issues on which adoption depends. Spatial cyberinfrastructures will have a higher chance of success if users of many types, including nonprofessionals, are made central to the development process. Recent studies in the...
OSL dating of a Pleistocene maar: Birket Ram, the Golan heights
U. Shaanan, N. Porat, O. Navon, R. Weinberger, A. Calvert, Y. Weinstein
2011, Journal of Volcanology and Geothermal Research (201) 397-403
Direct dating of maars and their phreatomagmatic deposits is difficult due to the dominance of lithic (host rock) fragments and glassy particles of the juvenile magma. In this paper we demonstrate that optically stimulated luminescence (OSL) dating can be successfully used for age determination of phreatomagmatic deposits. We studied the...
