Escherichia coli and enterococci at beaches in the Grand Traverse Bay, Lake Michigan: Sources, characteristics, and environmental pathways
S.K. Haack, L.R. Fogarty, C. Wright
2003, Environmental Science & Technology (37) 3275-3282
This study quantified Escherichia coli(EC) and enterococci (ENT) in beach waters and dominant source materials, correlated these with ambient conditions, and determined selected EC genotypes and ENT phenotypes. Bathing-water ENT criteria were exceeded more frequently than EC criteria, providing conflicting interpretations of water quality. Dominant sources of EC and ENT...
Temporal connectivity in a prairie pothole complex
S.G. Leibowitz, K.C. Vining
2003, Wetlands (23) 13-25
A number of studies have noted the occurrence of intermittent surface-water connections between depressional wetlands in general and prairie potholes in particular. Yet, the ecological implications of such connections remain largely unexplored. In 1995, we observed spillage into and out of a North Dakota wetland during two field visits. Between...
Multichannel analysis of surface wave method with the autojuggie
G. Tian, D.W. Steeples, J. Xia, R. D. Miller, K.T. Spikes, M.D. Ralston
2003, Soil Dynamics and Earthquake Engineering (23) 243-247
The shear (S)-wave velocity of near-surface materials and its effect on seismic-wave propagation are of fundamental interest in many engineering, environmental, and groundwater studies. The multichannel analysis of surface wave (MASW) method provides a robust, efficient, and accurate tool to observe near-surface S-wave velocity. A recently developed device used to...
Paleozoic and Mesozoic silica-rich seawater: Evidence from hematitic chert (jasper) deposits
Tor Grenne, J. F. Slack
2003, Geology (31) 319-322
Laterally extensive beds of highly siliceous, hematitic chert (jasper) are associated with many volcanogenic massive sulfide (VMS) deposits of Late Cambrian to Early Cretaceous age, yet are unknown in analogous younger (including modern) settings. Textural studies suggest that VMS-related jaspers in the Ordovician Løkken ophiolite of Norway were originally deposited...
Effects of ungulates and prairie dogs on seed banks and vegetation in a North American mixed-grass prairie
J. T. Fahnestock, D.L. Larson, G. E. Plumb, J.K. Detling
2003, Plant Ecology (167) 255-268
The relationship between vegetation cover and soil seed banks was studied in five different ungulate herbivore-prairie dog treatment combinations at three northern mixed-grass prairie sites in Badlands National Park, South Dakota. There were distinct differences in both the seed bank composition and the aboveground vegetation between the off-prairie dog colony...
Determining long time-scale hyporheic zone flow paths in Antarctic streams
M.N. Gooseff, Diane M. McKnight, Robert L. Runkel, B. H. Vaughn
2003, Hydrological Processes (17) 1691-1710
In the McMurdo Dry Valleys of Antarctica, glaciers are the source of meltwater during the austral summer, and the streams and adjacent hyporheic zones constitute the entire physical watershed; there are no hillslope processes in these systems. Hyporheic zones can extend several metres from each side...
Herbicides and transformation products in surface waters of the Midwestern United States
W.A. Battaglin, E.M. Thurman, S. J. Kalkhoff, S. D. Porter
2003, Journal of the American Water Resources Association (39) 743-756
Most herbicides applied to crops are adsorbed by plants or transformed (degraded) in the soil, but small fractions are lost from fields and either move to streams in overland runoff, near surface flow, or subsurface drains, or they infiltrate slowly to ground water. Herbicide transformation products (TPs) can be more...
Experimental mycobacteriosis in striped bass Morone saxatilis
David T. Gauthier, M. W. Rhodes, W. K. Vogelbein, H. Kator, C. A. Ottinger
2003, Diseases of Aquatic Organisms (54) 105-117
Striped bass Morone saxatilis were infected intraperitoneally with approximately 105 Mycobacterium marinum, M. shottsii sp. nov., or M. gordonae. Infected fish were maintained in a flow-through freshwater system at 18 to 21°C, and were examined histologically and bacteriologically at 2, 4, 6, 8, 17, 26, 36 and 45 wk post-infection (p.i.). M. marinum caused acute peritonitis, followed...
Regional quaternary submarine geomorphology in the Florida Keys
B. H. Lidz, C. D. Reich, E.A. Shinn
2003, Geological Society of America Bulletin (115) 845-866
High-quality seismic reflection profiles fill a major gap in geophysical data along the south Florida shelf, allowing updated interpretations of the history of the Quaternary coral reef system. Incorporation of the new and existing data sets provides the basis for detailed color maps of the Pleistocene surface and thickness of...
Two-dimensional inverse and three-dimensional forward modeling of MT (magnetotelluric) data to evaluate the mineral potential of the Amphitheater Mountains, Alaska, USA
Louise Pellerin, Jeanine M. Schmidt, G. Michael Hoversten
2003, Conference Paper, Proceedings of the 3DEM-3 symposium: Three dimensional electromagnetics III: ASEG Special Publications 2003(1)
As part of an integrated geological and geophysical study to assess the mineral potential in the Amphitheater Mountains of south-central Alaska, USA, two magnetotelluric (MT) profiles were acquired during the summer of 2002. The two parallel MT lines, along with helicopter electromagnetic (HEM) and magnetic data acquired by the State...
Monitoring of Lost River and shortnose suckers at Upper Klamath Lake non-spawning locations
H.A. Hendrixson, E.C. Janney, R.S. Shively
2003, Report
Abstract not available ...
Monitoring of Lost River suckers in the lower Williamson River
T.J. Tyler, E.C. Janney, H. Hendrixson, R.S. Shively
2003, Report
Abstract not available ...
Juvenile steelhead and other fish rearing in the Wind River watershed. Connolly, J.P. (ed.), Wind River watershed restoration. 2000-2001
I.G. Jezorek, P.J. Connolly
P.J. Connolly, editor(s)
2003, Report
Abstract not available ...
The ecology of arsenic
Ronald S. Oremland, John F. Stolz
2003, Science (300) 939-944
Arsenic is a metalloid whose name conjures up images of murder. Nonetheless, certain prokaryotes use arsenic oxyanions for energy generation, either by oxidizing arsenite or by respiring arsenate. These microbes are phylogenetically diverse and occur in a wide range of habitats. Arsenic cycling may take place in the absence of...
Using 3D acoustic telemetry to assess the response of resident salmonids to strobe lights in Lake Roosevelt, Washington: Chief Joseph Kokanee Enhancement Feasibility Study, 2001-2002 annual report
R.W. Perry, M.J. Farley, G.S. Hansen, D.J. Shurtleff, D.W. Rondorf, R. LeCaire
2003, Report
In 1995, the Chief Joseph Kokanee Enhancement Project was established to mitigate the loss of anadromous fish due to the construction of Chief Joseph and Grand Coulee dams. The objectives of the Chief Joseph Enhancement Project are to determine the status of resident kokanee (Oncorhynchus nerka) populations above Chief Joseph...
Age of the Mono Lake excursion and associated tephra
L. Benson, J. Liddicoat, J. Smoot, A. Sarna-Wojcicki, R. Negrini, S. Lund
2003, Quaternary Science Reviews (22) 135-140
The Mono Lake excursion (MLE) is an important time marker that has been found in lake and marine sediments across much of the Northern Hemisphere. Dating of this event at its type locality, the Mono Basin of California, has yielded controversial results with the most recent effort concluding that the...
Mercury methylation in mine wastes collected from abandoned mercury mines in the USA
J. E. Gray, M.E. Hines, H. Biester, B.K. Lasorsa
Boutron C.Ferrari C., editor(s)
2003, Conference Paper, Journal De Physique. IV : JP
Speciation and transformation of Hg was studied in mine wastes collected from abandoned Hg mines at McDermitt, Nevada, and Terlingua, Texas, to evaluate formation of methyl-Hg, which is highly toxic. In these mine wastes, we measured total Hg and methyl-Hg contents, identified various Hg compounds using a pyrolysis technique, and...
Analog-to-digital conversion as a source of drifts in displacements derived from digital recordings of ground acceleration
D.M. Boore
2003, Bulletin of the Seismological Society of America (93) 2017-2024
Displacements obtained from double integration of digitally recorded ground accelerations often show drifts much larger than those expected for the true ground displacements. These drifts might be due to many things, including dynamic elastic ground tilt, inelastic ground deformation, hysteresis in the instruments, and cross feed due to misalignment of...
Number and size of last-glacial Missoula floods in the Columbia River valley between the Pasco Basin, Washington, and Portland, Oregon
G. Benito, J. E. O’Connor
2003, Geological Society of America Bulletin (115) 624-638
Field evidence and radiocarbon age dating, combined with hydraulic flow modeling, provide new information on the magnitude, frequency, and chronology of late Pleistocene Missoula floods in the Columbia River valley between the Pasco Basin, Washington, and Portland, Oregon. More than 25 floods had discharges of > 1.0 x 106 m3/s. At...
Body molt of male long-tailed ducks in the nearshore waters of the north slope, Alaska
M.D. Howell, J.B. Grand, Paul L. Flint
2003, The Wilson Bulletin (115) 170-175
We examined the timing and intensity of body molt in relation to stage of remige growth for postbreeding adult male Long-tailed Ducks (Clangula hyemalis) off the coast of northern Alaska. During this period, remige and rectrix feathers are molted simultaneously with body feathers during the prebasic molt, which results...
Physiological characteristics of wild Atlantic salmon post-smolts during estuarine and coastal migration
S.O. Stefansson, B. Th Bjornsson, K. Sundell, G. Nyhammer, S. D. McCormick
2003, Journal of Fish Biology (63) 942-955
Changes were measured in some of the major physiological variables associated with seawater adaptability, growth and energetics in wild Atlantic salmon Salmo salar smolts and post-smolts migrating from the river and through the estuary, fjord and coastal areas in the River Orkla and the Trondheimsfjord, Norway during late May to...
Determining temperature and thermal properties for heat-based studies of surface-water ground-water interactions: Appendix A of Heat as a tool for studying the movement of ground water near streams (Cir1260)
David A. Stonestrom, Kyle W. Blasch
David A. Stonestrom, Jim Constantz, editor(s)
2003, Report, Heat as a tool for studying the movement of ground water near streams (Cir1260)
Advances in electronics leading to improved sensor technologies, large-scale circuit integration, and attendant miniaturization have created new opportunities to use heat as a tracer of subsurface flow. Because nature provides abundant thermal forcing at the land surface, heat is particularly useful in studying stream-groundwater interactions. This appendix describes methods for...
Effects of flow regulation on shallow-water habitat dynamics and floodplain connectivity
Z.H. Bowen, K.D. Bovee, T.J. Waddle
2003, Transactions of the American Fisheries Society (132) 809-823
Our study examined the effects of flow regulation on the spatiotemporal availability of shallow habitat patches with slow current velocity (SSCV patches) and floodplain inundation in the unregulated Yellowstone River and the regulated Missouri River in Montana and North Dakota. We mapped representative sites and used hydraulic models and hydrograph...
Taking the pulse of mountains: Ecosystem responses to climatic variability
Daniel B. Fagre, David L. Peterson, Amy E. Hessl
2003, Climatic Change (59) 263-282
An integrated program of ecosystem modeling and field studies in the mountains of the Pacific Northwest (U.S.A.) has quantified many of the ecological processes affected by climatic variability. Paleoecological and contemporary ecological data in forest ecosystems provided model parameterization and validation at broad spatial and temporal scales for tree growth,...
Distribution and characteristics of Southwestern Willow Flycatcher breeding sites and territories: 1993 - 2001
Mark K. Sogge, Susan J. Sferra, Tracy McCarthey, Sartor O. Williams, Barbara E. Kus
2003, Studies in Avian Biology (26) 5-11
No abstract available....
