Effects of human-induced alteration of groundwater flow on concentrations of naturally-occurring trace elements at water-supply wells
J. D. Ayotte, Z. Szabo, M. J. Focazio, S. M. Eberts
2011, Applied Geochemistry (26) 747-762
The effects of human-induced alteration of groundwater flow patterns on concentrations of naturally-occurring trace elements were examined in five hydrologically distinct aquifer systems in the USA. Although naturally occurring, these trace elements can exceed concentrations that are considered harmful to human health. The results show that pumping-induced hydraulic gradient changes...
Flow structures and sandbar dynamics in a canyon river during a controlled flood, Colorado River, Arizona
Scott Wright, M. Kaplinski
2011, Journal of Geophysical Research F: Earth Surface (116)
In canyon rivers, debris fan constrictions create rapids and downstream pools characterized by secondary flow structures that are closely linked to channel morphology. In this paper we describe detailed measurements of the three‐dimensional flow structure and sandbar dynamics of two pools along the Colorado River in the Grand Canyon during...
Apogean-perigean signals encoded in tidal flats at the fluvio-estuarine transition of Glacier Creek, Turnagain Arm, Alaska; implications for ancient tidal rhythmites
S.F. Greb, A.W. Archer, D.G. Deboer
2011, Sedimentology (58) 1434-1452
Turnagain Arm is a macrotidal fjord‐style estuary. Glacier Creek is a small, glacially fed stream which enters the estuary tangentially near Girdwood, Alaska. Trenches and daily sedimentation measurements were made in a mudflat along the fluvio–estuarine transition of Glacier Creek during several summers since 2003. Each year, the flats appear...
Near-surface shear-wave velocity measurements in unlithified sediment
B.T. Richards, D. Steeples, R. Miller, J. Ivanov, S. Peterie, S.D. Sloan, J.R. McKenna
2011, SEG Technical Program Expanded Abstracts (30) 1416-1420
S-wave velocity can be directly correlated to material stiffness and lithology making it a valuable physical property that has found uses in construction, engineering, and environmental projects. This study compares different methods for measuring S-wave velocities, investigating and identifying the differences among the methods' results, and prioritizing the different methods...
Viruses and bacteria in karst and fractured rock aquifers in east Tennessee, USA
T.B. Johnson, L.D. McKay, A.C. Layton, S.W. Jones, G.C. Johnson, J.L. Cashdollar, D.R. Dahling, L.F. Villegas, G.S. Fout, D.E. Williams, G. Sayler
2011, Ground Water (49) 98-110
A survey of enteric viruses and indicator bacteria was carried out in eight community water supply sources (four wells and four springs) in East Tennessee. Seven sites derived their water from carbonate aquifers and one from fractured sandstone. Four of the sites were deemed "low-risk" based on prior monitoring of...
Bird community response to filter strips in Maryland
P.J. Blank, G.P. Dively, D.E. Gill, C.A. Rewa
2011, Journal of Wildlife Management (75) 116-125
Filter strips are strips of herbaceous vegetation planted along agricultural field margins adjacent to streams or wetlands and are designed to intercept sediment, nutrients, and agrichemicals. Roughly 16,000 ha of filter strips have been established in Maryland through the United States Department of Agriculture's Conservation Reserve Enhancement Program. Filter strips...
A conduit dilation model of methane venting from lake sediments
B.P. Scandella, C. Varadharajan, Harold F. Hemond, C. Ruppel, R. Juanes
2011, Geophysical Research Letters (38)
Methane is a potent greenhouse gas, but its effects on Earth's climate remain poorly constrained, in part due to uncertainties in global methane fluxes to the atmosphere. An important source of atmospheric methane is the methane generated in organic-rich sediments underlying surface water bodies, including lakes, wetlands, and the ocean....
Spatiotemporal distribution and population characteristicsof a nonnative lake trout population, with implications for suppression
A.M. Dux, C.S. Guy, W.A. Fredenberg
2011, North American Journal of Fisheries Management (31) 187-196
We evaluated the distribution and population characteristics of nonnative lake trout Salvelinus namaycush in Lake McDonald,Glacier National Park,Montana, to provide biological data in support of a potential suppression program. Using ultrasonic telemetry, we identified spatial and temporal distribution patterns by tracking 36 adult lake trout (1,137 relocations). Lake trout rarely...
Labile Fe(II) concentrations in the Atlantic sector of the Southern Ocean along a transect from the subtropical domain to the Weddell Sea Gyre
G. Sarthou, E. Bucciarelli, F. Chever, S.P. Hansard, M. Gonzalez-Davila, J. M. Santana-Casiano, F. Planchon, S. Speich
2011, Biogeosciences Discussions (8) 4163-4208
Labile Fe(II) distributions were investigated in the Sub-Tropical South Atlantic and the Southern Ocean during the BONUS-GoodHope cruise from 34 to 57?? S (February-March 2008). Concentrations ranged from below the detection limit (0.009 nM) to values as high as 0.125 nM. In the surface mixed layer, labile Fe(II) concentrations were...
Field flume reveals aquatic vegetation's role in sediment and particulate phosphorus transport in a shallow aquatic ecosystem
J. W. Harvey, G.B. Noe, L. G. Larsen, D.J. Nowacki, L.E. McPhillips
2011, Geomorphology (126) 297-313
Flow interactions with aquatic vegetation and effects on sediment transport and nutrient redistribution are uncertain in shallow aquatic ecosystems. Here we quantified sediment transport in the Everglades by progressively increasing flow velocity in a field flume constructed around undisturbed bed sediment and emergent macrophytes. Suspended sediment < 100 μm was...
Determinants of fish assemblage structure in Northwestern Great Plains streams
J.A. Mullen, R.G. Bramblett, C.S. Guy, A.V. Zale, D.W. Roberts
2011, Transactions of the American Fisheries Society (140) 271-281
Prairie streams are known for their harsh and stochastic physical conditions, and the fish assemblages therein have been shown to be temporally variable. We assessed the spatial and temporal variation in fish assemblage structure in five intermittent, adventitious northwestern Great Plains streams representing a gradient of watershed areas. Fish assemblages...
Intercolony variation in growth of black brant goslings on the Yukon-Kuskokwim Delta, Alaska
T.F. Fondell, Paul L. Flint, J.S. Sedinger, C.A. Nicolai, J.L. Schamber
2011, Journal of Wildlife Management (75) 101-108
Recent declines in black brant (Branta bernicla nigricans) are likely the result of low recruitment. In geese, recruitment is strongly affected by habitat conditions experienced by broods because gosling growth rates are indicative of forage conditions during brood rearing and strongly influence future survival and productivity. In 2006–2008, we studied...
Comparative evaluation of molecular diagnostic tests for Nucleospora salmonis and prevalence in migrating juvenile salmonids from the Snake River, USA
Samantha Badil, Diane G. Elliott, Tomofumi Kurobe, Ronald P. Hedrick, Kathy Clemens, Marilyn Blair, Maureen K. Purcell
2011, Journal of Aquatic Animal Health (23) 19-29
Nucleospora salmonis is an intranuclear microsporidian that primarily infects lymphoblast cells and contributes to chronic lymphoblastosis and a leukemia-like condition in a range of salmonid species. The primary goal of this study was to evaluate the prevalence of N. salmonis in out-migrating juvenile hatchery and wild Chinook salmon Oncorhynchus tshawytscha...
Advancing environmental toxicology through chemical dosimetry: External exposures versus tissue residues
L.S. McCarty, P.F. Landrum, S. N. Luoma, J.P. Meador, A.A. Merten, B.K. Shephard, A.P. van Wezelzz
2011, Integrated Environmental Assessment and Management (7) 7-27
The tissue residue dose concept has been used, although in a limited manner, in environmental toxicology for more than 100 y. This review outlines the history of this approach and the technical background for organic chemicals and metals. Although the toxicity of both can be explained in tissue residue terms,...
Notes on the origin of inertinite macerals in coals: Funginite associations with cutinite and suberinite
J.C. Hower, J.M.K. O’Keefe, C.F. Eble, T.J. Volk, A.R. Richardson, Anne B. Satterwhite, R.S. Hatch, I.J. Kostova
2011, International Journal of Coal Geology (85) 186-190
The association of fungus with plant leaves and roots is ubiquitous. While many of these occurrences are considered to be pathogenic, mycorrhizzal fungal associations with roots are essential for plant growth. Despite the common knowledge of such relationships in plant science, with a few exceptions, the fungus/leaf/root/stem association as the...
Recent faulting in western Nevada revealed by multi-scale seismic reflection
R.N. Frary, J.N. Louie, W. J. Stephenson, J. K. Odum, A. Kell, A. Eisses, G.M. Kent, N. W. Driscoll, R. Karlin, R. L. Baskin, S. Pullammanappallil, L.M. Liberty
2011, SEG Technical Program Expanded Abstracts (30) 1373-1377
The main goal of this study is to compare different reflection methods used to image subsurface structure within different physical environments in western Nevada. With all the methods employed, the primary goal is fault imaging for structural information toward geothermal exploration and seismic hazard estimation. We use seismic CHIRP a...
Seismic hazard assessment: Issues and alternatives
Z. Wang
2011, Pure and Applied Geophysics (168) 11-25
Seismic hazard and risk are two very important concepts in engineering design and other policy considerations. Although seismic hazard and risk have often been used inter-changeably, they are fundamentally different. Furthermore, seismic risk is more important in engineering design and other policy considerations. Seismic hazard assessment is an effort by...
Classification of Thermal Patterns at Karst Springs and Cave Streams
A.J. Luhmann, M.D. Covington, Albert J. Peters, S.C. Alexander, C.T. Anger, J.A. Green, Anthony C. Runkel, E.C. Alexander
2011, Ground Water (49) 324-335
Thermal patterns of karst springs and cave streams provide potentially useful information concerning aquifer geometry and recharge. Temperature monitoring at 25 springs and cave streams in southeastern Minnesota has shown four distinct thermal patterns. These patterns can be divided into two types: those produced by flow paths with ineffective heat...
Inversion of multi-frequency electromagnetic induction data for 3D characterization of hydraulic conductivity
Troy R. Brosten, Frederick D. Day-Lewis, Gregory M. Schultz, Gary P. Curtis, John W. Lane Jr.
2011, Journal of Applied Geophysics (73) 323-335
Electromagnetic induction (EMI) instruments provide rapid, noninvasive, and spatially dense data for characterization of soil and groundwater properties. Data from multi-frequency EMI tools can be inverted to provide quantitative electrical conductivity estimates as a function of depth. In this study, multi-frequency EMI data collected across an abandoned uranium mill site...
Seasonal fecundity and source-sink status of shrub-nesting birds in a southwestern riparian corridor
L. Arriana Brand, B.R. Noon
2011, Wilson Journal of Ornithology (123) 48-58
Saltcedar (Tamarix spp.) has increasingly dominated riparian floodplains relative to native forests in the southwestern U.S., but little is known about its impacts on avian productivity or population status. We monitored 86 Arizona Bell's Vireo (Vireo bellii arizonae), 147 Abert's Towhee (Melozone aberti), and 154 Yellow-breasted Chat (<span...
Introduction
Peter D. Warwick, Robert W. Hook, John R. SanFilipo
Peter D. Warwick, Alexander K. Karlsen, Matthew D. Merrill, Brett J. Valentine, editor(s)
2011, Book chapter, Geologic assessment of coal in the Gulf of Mexico coastal plain
The National Coal Resource Assessment (NCRA) team of the U.S. Geological Survey (USGS) has assessed the quantity and quality of coal beds and zones that could be mined during the next 20 years or more. Geologic, geochemical, and resource information was collected and compiled for the five major coal-producing regions...
Geology of the Montreal River Monocline (Field trip guidebook)
William F. Cannon
2011, Conference Paper, Proceedings and Abstracts - Institute on Lake Superior Geology. Meeting 57
No abstract available....
A review of Alabama lignite deposits
Claire E. Aubourg
Peter D. Warwick, Alexander K. Karlsen, Matthew D. Merrill, Brett J. Valentine, editor(s)
2011, Book chapter, Geologic assessment of coal in the Gulf of Mexico coastal plain
This review of Alabama lignite deposits is a part of the U.S. Geological Survey (USGS) National Coal Resource Assessment (NCRA) of the Gulf Coast region (see Ruppert et al., 2002; Dennen, 2009; and other chapters of this publication). Because lignite is not currently mined in Alabama, a detailed assessment of the...
Midcontinent microcosm: Geology of the Atkins lake - Marengo falls area (Field trip 2)
Marcia Bjornerud, William F. Cannon
2011, Conference Paper, Institute on Lake Superior Geology, Proceedings Volume 57, Part 2: Field Trip Guidebook
Archean and Proterozoic rocks exposed over about 16km2 between Atkins Lake and Coffee Lake in southeastern Bayfield County (Fig. 1) chronicle almost all of the major Precambrian geologic events in the history of the southern Superior Craton. The oldest rocks are part of a locally gneissic quartz monzonite complex, the...
Assessing the role of conspecific attraction in habitat restoration for Henslow's sparrows in Iowa
Jennifer A. Vogel, Rolf R. Koford, David L. Otis
2011, Prairie Naturalist (43) 23-28
The presence of conspecific individuals may provide important cues about habitat quality for territorial songbirds. We tested the ability of a conspecific song playback system to attract Henslow’s sparrows to previously unoccupied restored habitat. We successfully attracted Heslow’s sparrows to 3 of 7 treatment plots using conspecific song playbacks and...
