Lake bed classification using acoustic data
Karen K. Yin, Xing Li, John Bonde, Carl Richards, Gary Cholwek
1998, Applied Mathematics and Computer Science (8) 841-864
As part of our effort to identify the lake bed surficial substrates using remote sensing data, this work designs pattern classifiers by multivariate statistical methods. Probability distribution of the preprocessed acoustic signal is analyzed first. A confidence region approach is then adopted to improve the design of the...
Bird flight characteristics near wind turbines in Minnesota
R. G. Osborn, Charles D. Dieter, Kenneth F. Higgins, R. E. Usgaard
1998, American Midland Naturalist (139) 29-38
During 1994–1995, we saw 70 species of birds on the Buffalo Ridge Wind Resource Area. In both years bird abundance peaked in spring. Red-winged blackbirds (Agelaius phoeniceus), mallards (Anas platyrhynchos), common grackles (Quiscalus quiscula), and barn swallows (Hirundo rustica) were the species most commonly seen. Most birds (82–84%) flew above...
Trace element abundances of high-MgO glasses from Kilauea, Mauna Loa and Haleakala volcanoes, Hawaii
T.P. Wagner, David A. Clague, E.H. Hauri, T.L. Grove
1998, Contributions to Mineralogy and Petrology (131) 13-21
We performed an ion-microprobe study of eleven high-MgO (6.7-14.8 wt%) tholeiite glasses from the Hawaiian volcanoes Kilauea, Mauna Loa and Haleakala. We determined the rare earth (RE), high field strength, and other selected trace element abundances of these glasses, and used the data to establish their relationship to typical Hawaiian...
Pair interactions in red-faced warblers
P.M. Barber, T. E. Martin, Kimberly G. Smith
1998, Condor (100) 512-518
Forty pairs of breeding Red-faced Warblers (Cardellina rubrifrons) were observed in 1992 and 1993 on the Mogollon Rim, Arizona. Intrusions by extra-pair males, interactions between pair members, and other pair interaction behaviors were recorded. The majority of intrusions occurred during the building stage of the nesting cycle. Males responded to...
DNA-labeled clay: A sensitive new method for tracing particle transport
B.J. Mahler, M. Winkler, P. Bennett, D.M. Hillis
1998, Geology (26) 831-834
The behavior of mobile colloids and sediment in most natural environments remains poorly understood, in part because characteristics of existing sediment tracers limit their widespread use. Here we describe the development of a new approach that uses a DNA-labeled montmorillonite clay as a...
Production of bromoform and dibromomethane by Giant Kelp: Factors affecting release and comparison to anthropogenic bromine sources
K.D. Goodwin, W.J. North, M.E. Lidstrom
1998, Limnology and Oceanography (42) 1725-1734
Macrocystis pyrifera (Giant Kelp), a dominant macroalgal species in southern California, produced 171 ng per g fresh wt (gfwt) per day of CHBr3 and 48 ng gfwt-1 d-1 of CH2Br2 during laboratory incubations of whole blades. Comparable rates were measured during in situ incubations of intact fronds. Release of CHBr3...
Effect of implanted satellite transmitters on the nesting behavior of Murres
P.M. Meyers, Scott A. Hatch, D.M. Mulcahy
1998, Condor (100) 172-174
We implanted 6 Common Murres (Uria aalge) and 10 Thick-billed Murres (Uria lomvia) with satellite transmitters and compared subsequent presence at the colony, nesting status, and provisioning to a control group that underwent a simple surgical procedure. In the 10 days following implantation, we resighted 10 of 11 control birds...
Sensitivity of condition indices to changing density in a white-tailed deer population
M.G. Sams, R.L. Lochmiller, C.W. Qualls Jr., David M. Leslie Jr.
1998, Journal of Wildlife Diseases (34) 110-125
The ways in which comprehensive condition profiles, incorporating morphometric, histologic, physiologic, and diet quality indices, responded to changes in density of a white-tailed deer (Odocoileus virginianus) population were examined. Changes in these condition indices were monitored in a northeastern Oklahoma deer herd as...
Effects of the herbicide atrazine on Ambystoma tigrinum metamorphosis: duration, larval growth, and hormonal response
Diane L. Larson, Susan McDonald, Steven J. Hamilton, Albert J. Fivizzani, Wesley E. Newton
1998, Physiological Zoology (71) 671-679
We exposed larval tiger salamanders (Ambystoma tigrinum) reared in the laboratory from eggs collected from a prairie wetland in North Dakota to three concentrations of atrazine (0, 75, and 250 i??g/L) in a static renewal test to determine the pesticide's effect on (1) plasma corticosterone and thyroxine concentrations, (2) larval...
Breeding synchrony and extrapair fertilizations in two populations of red-winged blackbirds
D. F. Westneat, Elizabeth M. Gray
1998, Behavioral Ecology (9) 456-464
We tested the relationship between synchrony of breeding and the frequency of extrapair fertilizations (EPFs) in two populations of red-winged blackbirds known to differ in female extrapair behavior. We found no association between the number of simultaneously fertilizable females (temporal neighbors) and EPF rate in either population, although a significant...
Correlating N2 and CH4 adsorption on microporous carbon using a new analytical model
Jielun Sun, S. Chen, M.J. Rood, M. Rostam-Abadi
1998, Energy and Fuels (12) 1071-1078
A new pore size distribution (PSD) model is developed to readily describe PSDs of microporous materials with an analytical expression. Results from this model can be used to calculate the corresponding adsorption isotherm to compare the calculated isotherm to the experimental isotherm. This aspect of the model provides another check...
Distribution and ecology of the big-eared bat, Corynorhinus (=Plecotus) townsendii in Californa
Elizabeth D. Pierson, Gary M. Fellers
1998, Report
This study had two primary objectives: to conduct roost surveys C. townsendii in two parts of California where distributional information was most limited or lacking, and to obtain information on roosting and foraging ecology in two distinctly different habitats. This project was urgently needed because 1) recent California Department of...
Synthetic aperture radar interferometry coherence analysis over Katmai volcano group, Alaska
Z. Lu, J.T. Freymueller
1998, Journal of Geophysical Research B: Solid Earth (103) 29887-29894
The feasibility of measuring volcanic deformation or monitoring deformation of active volcanoes using space-borne synthetic aperture radar (SAR) interferometry depends on the ability to maintain phase coherence over appropriate time intervals. Using ERS 1 C band (λ=5.66 cm) SAR imagery, we studied the seasonal and temporal changes of the interferometric...
Gill net saturation by lake trout in Michigan waters of Lake Superior
Michael J. Hansen, Richard G. Schorfhaar, James H. Selgeby
1998, North American Journal of Fisheries Management (18) 847-853
We conducted experimental fishing for lake trout Salvelinus namaycush in Michigan waters of Lake Superior to determine the importance of soak time on catch per effort (CPE) in numbers per kilometer of standard gill net. We modeled CPE as a nonlinear function of the number of nights between setting and lifting (soak...
Metal uptake by phytoplankton during a bloom in South San Francisco Bay: Implications for metal cycling in estuaries
S. N. Luoma, A. VanGeen, B.-G. Lee, J. E. Cloern
1998, Limnology and Oceanography (43) 1007-1016
The 1994 spring phytoplankton bloom in South San Francisco Bay caused substantial reductions in concentrations of dissolved Cd, Ni, and Zn, but not Cu. We estimate that the equivalent of ~60% of the total annual input of Cd, Ni, and Zn from local waste‐water treatment plants is...
Interactions between pool geometry and hydraulics
Douglas M. Thompson, Jonathan M. Nelson, Ellen E. Wohl
1998, Water Resources Research (34) 3673-3681
An experimental and computational research approach was used to determine interactions between pool geometry and hydraulics. A 20-m-long, 1.8-m-wide flume was used to investigate the effect of four different geometric aspects of pool shape on flow velocity. Plywood sections were used to systematically alter constriction width, pool depth, pool length,...
Occurrence and distribution of semivolatile organic compounds in stream bed sediments, United States, 1992-95
Thomas J. Lopes, Edward T. Furlong, Jeffrey W. Pritt
Edward E. Little, Bruce M. Greenberg, Aaron J. DeLonay, editor(s)
1998, Book chapter, Environmental Toxicology and Risk Assessment: Seventh Volume
Bed-sediment samples from streams were collected from 443 sites in 19 major river basins during 1992-95 and analyzed for semivolatile organic compounds (SVOCs) to assess the occurrence and distribution of selected Hydrophobic contaminants. Forty SVOCs were detected in more than 5 percent of samples. Of these 40 SVOCs, 27 were...
Predator response to releases of American shad larvae in the Susquehanna River basin
James H. Johnson, N.H. Ringler
1998, Ecology of Freshwater Fish (7) 192-199
Predation on American shad (Alosa sapidissima) larvae within the first two hours of release was examined from 1989 to 1992 on 31 occasions at stocking sites in the Susquehanna River basin. Twenty-two fish species consumed shad larvae; the dominant predators were spotfin shiner (Cyprinella spiloptera), mimic shiner (Notropis volucellus) and...
Tectonic controls on fault-zone permeability in a geothermal reservoir at Dixie Valley, Nevada
Stephen Hickman, Mark Zoback, Richard Benoit
1998, Conference Paper, Proceedings of the SPE/ISRM Rock Mechanics in Petroleum Engineering Conference
To determine factors controlling permeability variations within and adjacent to a fault-hosted geothermal reservoir at Dixie Valley, Nevada, we conducted borehole televiewer observations of wellbore failure (breakouts and cooling cracks) together with hydraulic fracturing stress measurements in six wells drilled into the Stillwater fault zone at depths of 2 to...
Seasonal and spatial patterns of nitrate and silica concentrations in Canajoharie Creek, New York
G. R. Wall, P. J. Phillips, K. Riva-Murray
1998, Journal of Environmental Quality (27) 381-389
The impact of nonpoint-source pollution on surface waters in agricultural watersheds is an emerging environmental issue. As part of the U.S. Geological Survey National Water Quality Assessment program in the Hudson River Basin, Canajoharie Creek was monitored for seasonal and spatial patterns of nutrient chemistry...
Sampling-variance effects on detecting density dependence from temporal trends in natural populations
Tanya M Shenk, Gary C. White, Kenneth P. Burnham
1998, Ecological Monographs (68) 445-463
Monte Carlo simulations were conducted to evaluate robustness of four tests to detect density dependence, from series of population abundances, to the addition of sampling variance. Population abundances were generated from random walk, stochastic exponential growth, and density-dependent population models. Population abundance estimates were generated with sampling variances distributed as...
Mapping the global land surface using 1 km AVHRR data
D. T. Lauer, J.C. Eidenshink
1998, Space Technology (18) 71-76
The scientific requirements for mapping the global land surface using 1 km advanced very high resolution radiometer (AVHRR) data have been set forth by the U.S. Global Change Research Program; the International Geosphere Biosphere Programme (IGBP); The United Nations; the National Oceanic and Atmospheric Administration (NOAA); the Committee on Earth...
Adherence to balance tolerance limits at the Upper Mississippi Science Center, La Crosse, Wisconsin
C.T. Myers, D.M. Kennedy
1998, Quality assurance (San Diego, Calif.) (6) 45-52
Verification of balance accuracy entails applying a series of standard masses to a balance prior to use and recording the measured values. The recorded values for each standard should have lower and upper weight limits or tolerances that are accepted as verification of balance accuracy under normal operating conditions. Balance...
Hydrology of prairie pothole wetlands during drought and deluge: A 17-year study of the Cottonwood Lake wetland complex in North Dakota in the perspective of longer term measured and proxy hydrological records
T. C. Winter, D.O. Rosenberry
1998, Climatic Change (40) 189-209
From 1988 to 1992 the north-central plains of North America had a drought that was followed by a wet period that continues to the present (1997). Data on the hydrology of the Cottonwood Lake area (CWLA) collected for nearly 10 years before, and during, the recent dry and wet periods...
Movements and passage routes of radio-tagged juvenile Chinook salmon and steelhead in the forebay of Lower Granite Dam as determined from fixed-site receiver stations
N.S. Adams, S.D. Evans, R.W. Perry, J.M. Plumb
1998, Report, Migrational characteristics of juvenile Chinook salmon and steelhead in the forebay of Lower Granite Dam relative to the 1997 surface bypass collector tests
Abstract not available ...
