The effects of habitat resolution on models of avian diversity and distributions: A comparison of two land-cover classifications
Joshua J. Lawler, Raymond. J. O’Connor, Carolyn T. Hunsaker, K. Bruce Jones, Thomas R. Loveland, Denis White
2004, Landscape Ecology (19) 517-532
Quantifying patterns is a key element of landscape analysis. One aspect of this quantification of particular importance to landscape ecologists is the classification of continuous variables to produce categorical variables such as land-cover type or elevation stratum. Although landscape ecologists are fully aware of the importance of spatial resolution in...
Tectonic histories between Alba Patera and Syria Planum, Mars
R. C. Anderson, J. M. Dohm, A. F. C. Haldemann, T.M. Hare, V.R. Baker
2004, Icarus (171) 31-38
Syria Planum and Alba Patera are two of the most prominent features of magmatic-driven activity identified for the Tharsis region and perhaps for all of Mars. In this study, we have performed a Geographic Information System-based comparative investigation of their tectonic histories using published geologic map information and Mars Orbiter...
Depletion of the chloramine-T marker residue, para-toluenesulfonamide, from skin-on fillet tissue of hybrid striped bass, rainbow trout, and yellow perch
J.R. Meinertz, G. R. Stehly, Shari L. Greseth, M.P. Gaikowski, W.H. Gingerich
2004, Aquaculture (235) 65-75
Waterborne exposure to n-sodium-n-chloro-p-toluenesulfonamide (chloramine-T) is an effective treatment for controlling fish mortalities caused by bacterial gill disease (BGD). Currently, data are being generated to gain United States Food and Drug Administration (FDA) approval for the use of chloramine-T in aquaculture. As part of the data required for an approval,...
Cross scale interactions, nonlinearities, and forecasting catastrophic events
Debra P. C. Peters, Roger A. Pielke Sr., Brandon T. Bestelmeyer, Craig D. Allen, Stuart Munson-McGee, Kris M. Havstad
2004, PNAS (101) 15130-15135
Catastrophic events share characteristic nonlinear behaviors that are often generated by cross-scale interactions and feedbacks among system elements. These events result in surprises that cannot easily be predicted based on information obtained at a single scale. Progress on catastrophic events has focused on one of the following two areas: nonlinear...
Gene flow and genetic characterization of Northern Goshawks breeding in Utah
Sarah A. Sonsthagen, Sandra L. Talbot, C.M. White
2004, Condor (106) 826-836
Adult movement and natal dispersal data demonstrate that Northern Goshawks (Accipiter gentilis) are able to travel over long distances, suggesting a large functional population. However, these data are unable to determine whether these movements contribute to gene flow among adjacent breeding areas. We used eight microsatellite DNA loci and mitochondrial...
Land cover mapping of North and Central America—Global Land Cover 2000
Rasim Latifovic, Zhi-Liang Zhu
2004, Remote Sensing of Environment (89) 116-127
The Land Cover Map of North and Central America for the year 2000 (GLC 2000-NCA), prepared by NRCan/CCRS and USGS/EROS Data Centre (EDC) as a regional component of the Global Land Cover 2000 project, is the subject of this paper. A new mapping approach for transforming satellite observations acquired by...
Influential environmental gradients and spatiotemporal patterns of fish assemblages in the unimpounded Upper Mississippi River
V.A. Barko, M.W. Palmer, D.P. Herzog, B.S. Ickes
2004, American Midland Naturalist (152) 369-385
We investigated variation of fish assemblages in response to environmental factors using Long Term Resource Monitoring Program data. Data were collected from 1993 to 2000 from five physical habitats in the unimpounded upper Mississippi River. We captured 89 species composing 18 families. Of these, 26% were fluvial specialists, 25% were...
Does presence of permanent fresh water affect recruitment in prairie-nesting dabbling ducks?
Gary L. Krapu, P.J. Pietz, D.A. Brandt, R. R. Cox Jr.
2004, Journal of Wildlife Management (68) 332-341
In the Prairie Pothole Region (PPR) of North Dakota, USA, American mink (Mustela vison) are a major predator of ducklings. Mink populations plummet during severe droughts, but some mink survive where permanent fresh water is available. In 1992–1993, we evaluated whether development of a permanent water body, the 125-km...
Beliefs and attitudes toward lethal management of deer in Cuyahoga Valley National Park
D.C. Fulton, K. Skerl, E.M. Shank, D.W. Lime
2004, Conference Paper, Wildlife Society Bulletin
We used the theory of reasoned action to help understand attitudes and beliefs about lethal management of deer (Odocoileus virginianus) in Cuyahoga Valley National Park (CVNP), Ohio. We used a mail-back survey to collect data from Ohio residents in the surrounding 9-county area. Two strata were defined: residents <10 km...
Standard penetration test-based probabilistic and deterministic assessment of seismic soil liquefaction potential
K.O. Cetin, R.B. Seed, A. Der Kiureghian, K. Tokimatsu, L.F. Harder Jr., R. E. Kayen, R.E.S. Moss
2004, Journal of Geotechnical and Geoenvironmental Engineering (130) 1314-1340
This paper presents'new correlations for assessment of the likelihood of initiation (or triggering) of soil liquefaction. These new correlations eliminate several sources of bias intrinsic to previous, similar correlations, and provide greatly reduced overall uncertainty and variance. Key elements in the development of these new correlations are (1) accumulation of...
Hydraulic tests in highly permeable aquifers
James J. Butler Jr., Xiaoyong Zhan
2004, Water Resources Research (40)
A semianalytical solution is presented for a mathematical model describing the flow of groundwater in response to a slug or pumping test in a highly permeable, confined aquifer. This solution, which is appropriate for wells of any degree of penetration and incorporates inertial mechanisms at both the test and observation...
Strontium isotopic signatures of oil-field waters: Applications for reservoir characterization
R.J. Barnaby, G.C. Oetting, G. Gao
2004, American Association of Petroleum Geologists Bulletin (88) 1677-1704
The 87Sr/86Sr compositions of formation waters that were collected from 71 wells producing from a Pennsylvanian carbonate reservoir in New Mexico display a well-defined distribution, with radiogenic waters (up to 0.710129) at the updip western part of the reservoir, grading downdip to less radiogenic waters (as low as 0.708903 to...
A method for evaluating the importance of system state observations to model predictions, with application to the Death Valley regional groundwater flow system
Claire R. Tiedeman, D. Matthew Ely, Mary C. Hill, Grady M. O’Brien
2004, Water Resources Research (40)
We develop a new observation‐prediction (OPR) statistic for evaluating the importance of system state observations to model predictions. The OPR statistic measures the change in prediction uncertainty produced when an observation is added to or removed from an existing monitoring network, and it can be used to guide refinement and...
3D near-to-surface conductivity reconstruction by inversion of VETEM data using the distorted Born iterative method
G.L. Wang, W.C. Chew, T.J. Cui, A.A. Aydiner, D.L. Wright, D.V. Smith
2004, Inverse Problems (20)
Three-dimensional (3D) subsurface imaging by using inversion of data obtained from the very early time electromagnetic system (VETEM) was discussed. The study was carried out by using the distorted Born iterative method to match the internal nonlinear property of the 3D inversion problem. The forward solver was based on the...
The Coso geothermal area: A laboratory for advanced MEQ studies for geothermal monitoring
B.R. Julian, G.R. Foulger, K. Richards-Dinger
2004, Conference Paper, Geothermal Resources Council Transactions
The permanent 16-station network of three-component digital seismometers at the Coso geothermal area, California, supplemented by 14 temporary instruments deployed in connection with the DOE Enhanced Geothermal Systems (EGS) Project, provides high-quality microearthquake (MEQ) recordings that are well suited to monitoring a producing geothermal area. We are currently using these...
Reconstructing paleo lake levels from relict shorelines along the Upper Great Lakes
Steve J. Baedke, Todd A. Thompson, John W. Johnston, Douglas A. Wilcox
2004, Aquatic Ecosystem Health & Management (7) 435-449
Shorelines of the upper Great Lakes include many embayments that contain strandplains of beach ridges. These former shoreline positions of the lakes can be used to determine changes in the elevation of the lakes through time, and they also provide information on the warping of the ground surface that...
Spawning by lake sturgeon (Acipenser fulvescens) in the Detroit River
N.M. Caswell, D. L. Peterson, B.A. Manny, G.W. Kennedy
2004, Journal of Applied Ichthyology (20) 1-6
Overfishing and habitat destruction in the early 1900s devastated lake sturgeon (Acipenser fulvescens) populations in the Great Lakes. Although a comprehensive restoration strategy for this species was recently drafted by the Michigan Department of Natural Resources, a lack of current data on Great Lakes sturgeon stocks has hindered rehabilitation efforts....
Escherichia coli sampling reliability at a frequently closed Chicago beach: monitoring and management implications
Richard L. Whitman, Meredith B. Nevers
2004, Environmental Science & Technology (38) 4241-4246
Monitoring beaches for recreational water quality is becoming more common, but few sampling designs or policy approaches have evaluated the efficacy of monitoring programs. The authors intensively sampled water for E. coli (N=1770) at 63rd Street Beach, Chicago for 6 months in 2000 in order to (1) characterize spatial-temporal trends, (2) determine...
A web-enabled system for integrated assessment of watershed development
R. Dymond, V. Lohani, B. Regmi, R. Dietz
2004, Conference Paper, Bridging the Gap: Meeting the World's Water and Environmental Resources Challenges - Proceedings of the World Water and Environmental Resources Congress 2001
Researchers at Virginia Tech have put together the primary structure of a web enabled integrated modeling system that has potential to be a planning tool to help decision makers and stakeholders in making appropriate watershed management decisions. This paper describes the integrated system, including data sources, collection, analysis methods, system...
Validation of two dilution models to predict chloramine-T concentrations in aquaculture facility effluent
M.P. Gaikowski, W.J. Larson, J. J. Steuer, W.H. Gingerich
2004, Aquacultural Engineering (30) 127-140
Accurate estimates of drug concentrations in hatchery effluent are critical to assess the environmental risk of hatchery drug discharge resulting from disease treatment. This study validated two dilution simple n models to estimate chloramine-T environmental introduction concentrations by comparing measured and predicted chloramine-T concentrations using the US Geological Survey's Upper...
Population dynamics of bloaters Coregonus hoyi in Lake Huron, 1980-1998
Jeffrey S. Schaeffer
2004, Annales Zoologici Fennici (41) 271-279
I investigated population dynamics of bloaters Coregonus hoyi in Lake Huron using data collected during 1980-1998 from fixed-site trawl surveys. Bloaters were uncommon in 1980, but abundance increased during 1980-1992 through a series of strong year classes. High adult abundance appeared to suppress recruitment after 1992, and the population subsequently...
Observed and simulated ground motions in the San Bernardino basin region for the Hector Mine, California, earthquake
R.W. Graves, D.J. Wald
2004, Bulletin of the Seismological Society of America (94) 131-146
During the MW 7.1 Hector Mine earthquake, peak ground velocities recorded at sites in the central San Bernardino basin region were up to 2 times larger and had significantly longer durations of strong shaking than sites just outside the basin. To better understand the effects of 3D structure on the...
Transport and time lag of chlorofluorocarbon gases in the unsaturated zone, Rabis Creek, Denmark
Peter Engesgaard, Anker L. Højberg, Klaus Hinsby, Karsten H. Jensen, Troels Laier, Flemming Larsen, Eurybiades Busenberg, Niel Plummer
2004, Vadose Zone Journal (3) 1249-1261
Transport of chlorofluorocarbon (CFC) gases through the unsaturated zone to the water table is affected by gas diffusion, air–water exchange (solubility), sorption to the soil matrix, advective–dispersive transport in the water phase, and, in some cases, anaerobic degradation. In deep unsaturated zones, this may lead to a time lag between...
Hyperspectral analysis of the ultramafic complex and adjacent lithologies at Mordor, NT, Australia
L. C. Rowan, C.J. Simpson, J.C. Mars
2004, Remote Sensing of Environment (91) 419-431
The Mordor Complex consists of a series of potassic ultramafic rocks which were intruded into Proterozoic felsic gneisses and amphibolite and are overlain by quartzite and unconsolidated deposits. In situ and laboratory 0.4 to 2.5 ??m reflectance spectra show Al-OH absorption features caused by absorption in muscovite, kaolinite, and illite/smectite...
Use and interpretation of logistic regression in habitat-selection studies
Kim A. Keating, Steve Cherry
2004, Journal of Wildlife Management (68) 774-789
Logistic regression is an important tool for wildlife habitat-selection studies, but the method frequently has been misapplied due to an inadequate understanding of the logistic model, its interpretation, and the influence of sampling design. To promote better use of this method, we review its application and interpretation under 3...
