Landscape patterns as habitat predictors: Building and testing models for cavity-nesting birds in the Uinta Mountains of Utah, USA
J.J. Lawler, T.C. Edwards
2002, Landscape Ecology (17) 233-245
The ability to predict species occurrences quickly is often crucial for managers and conservation biologists with limited time and funds. We used measured associations with landscape patterns to build accurate predictive habitat models that were quickly and easily applied (i.e., required no additional data collection in the field to make...
An application of LIDAR to analyses of El Nino erosion in the Netarts littoral cell, Oregon
D.L. Revell, P.D. Komar, A. H. Sallenger Jr.
2002, Journal of Coastal Research (18) 792-801
El Nin??o produces coastal and beach erosion along the West Coast of the USA by elevating mean water levels so that tides are significantly higher than predicted, and by altering the paths of storms that generate large waves. In the past it has been difficult to adequately document the erosion...
Comparison of methods for nutrient measurement in calcareous soils: Ion-exchange resin bag, capsule, membrane, and chemical extractions
S. K. Sherrod, J. Belnap, M. E. Miller
2002, Soil Science (167) 666-679
Four methods for measuring quantities of 12 plant-available nutrients were compared using three sandy soils in a series of three experiments. Three of the methods use different ion-exchange resin forms—bags, capsules, and membranes—and the fourth was conventional chemical extraction. The first experiment compared nutrient extraction data from a medium of...
Instrumental intensity distribution for the Hector Mine, California, and the Chi-Chi, Taiwan, earthquakes: Comparison of two methods
V. Sokolov, D.J. Wald
2002, Bulletin of the Seismological Society of America (92) 2145-2162
We compare two methods of seismic-intensity estimation from ground-motion records for the two recent strong earthquakes: the 1999 (M 7.1) Hector Mine, California, and the 1999 (M 7.6) Chi-Chi, Taiwan. The first technique utilizes the peak ground acceleration (PGA) and velocity (PGV), and it is used for rapid generation of...
Generalized extreme gust wind speeds distributions
E. Cheng, C. Yeung
2002, Journal of Wind Engineering and Industrial Aerodynamics (90) 1657-1669
Since summer 1996, the US wind engineers are using the extreme gust (or 3-s gust) as the basic wind speed to quantify the destruction of extreme winds. In order to better understand these destructive wind forces, it is important to know the appropriate representations of these extreme gust wind speeds....
Bryophytes from Tuxedni Wilderness area, Alaska
Wilfred B. Schofield, Stephen S. Talbot, Sandra L. Talbot
2002, Journal of the Hattori Botanical Laboratory (92) 91-123
The bryoflora of two small maritime islands, Chisik and Duck Island (2,302 ha), comprising Tuxedni Wilderness in western lower Cook Inlet, Alaska, was examined to determine species composition in an area where no previous collections had been reported. The field study was conducted from sites selected to represent the totality...
Use of an extensive radio receiver network to document Pacific lamprey (Lampetra tridentata) entrance efficiency at fishways in the Lower Columbia River, USA
M.L. Moser, A.L. Matter, L.C. Stuehrenberg, T.C. Bjornn
2002, Conference Paper, Hydrobiologia
We used an extensive network of more than 170 radio receiving stations to document fine-scale passage efficiency of adult anadromous Pacific lamprey at Bonneville and The Dalles Dams in the lower Columbia River in the northwestern U.S.A. Each spring from 1997 to 2000, we released 197-299 lamprey with surgically implanted...
Magnetostratigraphy, paleomagnetic correlation, and deformation of pleistocene deposits in the south central Puget Lowland, Washington
J.T. Hagstrum, D. B. Booth, K. G. Troost, R.J. Blakely
2002, Journal of Geophysical Research B: Solid Earth (107) EPM 6-1-EPM 6-13
Paleomagnetic results from Pleistocene sedimentary deposits in the central Puget Lowland indicate that the region has experienced widespread deformation within the last 780 kyr. Three oriented samples were collected from unaltered fine-grained sediments mostly at sea level to determine the magnetostratigraphy at 83 sites. Of these, 47 have normal, 18...
Seed chemistry of Sophora chrysophylla (mamane) in relation to diet of specialist avian seed predator Loxioides bailleui (palila) in Hawaii
P.C. Banko, M.L. Cipollini, G.W. Breton, E. Paulk, M. Wink, Ido Izhaki
2002, Journal of Chemical Ecology (28) 1393-1410
This study describes the chemical ecology of a tritrophic interaction among species endemic to the island of Hawaii, USA: a tree (Sophora chrysophylla: mamane), an endangered bird (Loxioides bailleui; palila), and moth larvae (Cydia spp.). Palila and Cydia both specialize on the seed embryos of mamane but avoid eating the...
Using simple environmental variables to estimate below-ground productivity in grasslands
R.A. Gill, R.H. Kelly, W.J. Parton, K.A. Day, R.B. Jackson, J.A. Morgan, J.M.O. Scurlock, L.L. Tieszen, J.V. Castle, D.S. Ojima, X.S. Zhang
2002, Global Ecology and Biogeography (11) 79-86
In many temperate and annual grasslands, above-ground net primary productivity (NPP) can be estimated by measuring peak above-ground biomass. Estimates of below-ground net primary productivity and, consequently, total net primary productivity, are more difficult. We addressed one of the three main objectives of the Global Primary Productivity Data Initiative for...
Lag times of bank filtration at a well field, Cincinnati, Ohio, USA
R. A. Sheets, R.A. Darner, B.L. Whitteberry
2002, Journal of Hydrology (266) 162-174
Wells placed next to surface-water bodies to induce infiltration have come under scrutiny because of the presence of the potential pathogens in surface water. Removal of pathogens and other contaminants by bank filtration is assumed, but regulatory agencies question the effectiveness of this process. To investigate transport processes of biological...
Prioritizing conservation potential of arid-land montane natural springs and associated riparian areas
B.C. Thompson, P. L. Matusik-Rowan, K.G. Boykin
2002, Journal of Arid Environments (50) 527-547
Using inventory data and input from natural resource professionals, we developed a classification system that categorizes conservation potential for montane natural springs. This system contains 18 classes based on the presence of a riparian patch, wetland species, surface water, and evidence of human activity. We measured physical and biological components...
CPT site characterization for seismic hazards in the New Madrid seismic zone
T. Liao, P. W. Mayne, M.P. Tuttle, E.S. Schweig, R. B. Van Arsdale
2002, Soil Dynamics and Earthquake Engineering (22) 943-950
A series of cone penetration tests (CPTs) were conducted in the vicinity of the New Madrid seismic zone in central USA for quantifying seismic hazards, obtaining geotechnical soil properties, and conducting studies at liquefaction sites related to the 1811–1812 and prehistoric New Madrid earthquakes. The seismic piezocone provides four independent...
The 12 September 1999 Upper East Rift Zone dike intrusion at Kilauea Volcano, Hawaii
Peter Cervelli, P. Segall, F. Amelung, H. Garbeil, C. Meertens, S. Owen, Asta Mikijus, M. Lisowski
2002, Journal of Geophysical Research B: Solid Earth (107) ECV 3-1-ECV 3-13
Deformation associated with an earthquake swarm on 12 September 1999 in the Upper East Rift Zone of Kilauea Volcano was recorded by continuous GPS receivers and by borehole tiltmeters. Analyses of campaign GPS, leveling data, and interferometric synthetic aperture radar (InSAR) data from the ERS-2 satellite also reveal significant deformation...
Variation in survivorship of a migratory songbird throughout its annual cycle
Sillett T. Scott, Richard T. Holmes
2002, Journal of Animal Ecology (71) 296-308
1. Demographic data from both breeding and non-breeding periods are needed to manage populations of migratory birds, many of which are declining in abundance and are of conservation concern. Although habitat associations, and to a lesser extent, reproductive biology, are known for many migratory species, few studies have measured survival...
Ice core evidence of rapid air temperature increases since 1960 in alpine areas of the Wind River Range, Wyoming, United States
D. L. Naftz, D. D. Susong, P. F. Schuster, L.D. Cecil, M. D. Dettinger, R. L. Michel, C. Kendall
2002, Journal of Geophysical Research D: Atmospheres (107) ACL 3-1-ACL 3-16
Site-specific transfer functions relating delta oxygen 18 (δ18O) values in snow to the average air temperature (TA) during storms on Upper Fremont Glacier (UFG) were used in conjunction with δ18O records from UFG ice cores to reconstruct long-term trends in air temperature from alpine areas in the Wind River Range,...
The Sacatosa coalbed methane field: A first For Texas
Charles E. Barker, Peter D. Warwick, Robert J. Scott, J.M. Klein, R.W. Hook
2002, Conference Paper, AAPG Annual Meeting
In 2001, The Exploration Company (TXCO), San Antonio, announced the Sacatosa Coalbed Methane (CBM) Field in Maverick County. This field is the first CBM field in Texas (Fig. 1). The field is producing from bituminous coal in the Cretaceous Olmos Formation that outcrops to the west and dips easterly towards...
Evaluating the influence of source basins on downstream water quality in the Mississippi River
Gregory M. Clark, Robert E. Broshears, Richard P. Hooper, Donald A. Goolsby
2002, Journal of the American Water Resources Association (38) 803-818
Chemical variability in the Mississippi River during water years 1989 to 1998 was evaluated using stream discharge and water‐quality data in conjunction with the DAFLOW/BLTM hydraulic model. Model simulations were used to identify subbasin contributions of water and chemical constituents to the Mississippi River upstream from its confluence with the...
Empirical evidence for site coefficients in building code provisions
R. D. Borcherdt
2002, Earthquake Spectra (18) 189-217
Site-response coefficients, Fa and Fv, used in U.S. building code provisions are based on empirical data for motions up to 0.1 g. For larger motions they are based on theoretical and laboratory results. The Northridge earthquake of 17 January 1994 provided a significant new set of empirical data up to...
Space use, migratory connectivity, and population segregation among willets breeding in the western Great Basin
Susan M. Haig, Lewis W. Oring, Peter M. Sanzenbacher, Oriane W. Taft
2002, Condor (104) 620-630
Western Willets (Catoptrophorus semipalmatus inornatus) were banded (n = 146 breeding adults and chicks) and radio-marked (n = 68 adults) at three western Great Basin wetland complexes to determine inter- and intraseasonal space use and movement patterns (primarily in 1998 and 1999). Birds were then tracked to overwintering sites where...
Nitrogen loss from nonpolluted South American forests mainly via dissolved organic compounds
Steven S. Perakis, L. O. Hedin
2002, Nature (415) 416-419
Conceptual1,<a id="ref-link-section-d257630553e380" title="Aber, J. et al. Nitrogen saturation in temperate forest ecosystems: Hypotheses revisited. BioScience 48, 921–34 (1998)." href="https://www.nature.com/articles/415416a#ref-CR2" data-track="click" data-track-action="reference anchor"...
Mercury methylation at mercury mines in the Humboldt River Basin, Nevada, USA
J. E. Gray, J.G. Crock, B.K. Lasorsa
2002, Geochemistry: Exploration, Environment, Analysis (2) 143-149
Total Hg and methylmercury concentrations were measured in mine-waste calcines (retorted ore), sediment, and water samples collected in and around abandoned mercury mines in western Nevada to evaluate Hg methylation at the mines and in the Humboldt River Basin. Mine-waste calcines contain total Hg concentrations as high as 14 000...
Preliminary Results of a High-Resolution Aeromagnetic Survey to Identify Buried Faults at Dixie Valley, Nevada
R.P. Smith, V. J. S. Grauch, D.D. Blackwell
2002, Conference Paper, Transactions - Geothermal Resources Council
Preliminary results from a high-resolution aeromagnetic survey (200 m line spacing) acquired in Dixie Valley early in 2002 provide confirmation of intra-basin faulting based on subtle surface indications. In addition the data allow identification of the locations and trends of many faults that have not been recognized at the surface,...
Measurement of Turbulence with Acoustic Doppler Current Profilers - Sources of Error and Laboratory Results
E.A. Nystrom, K. A. Oberg, C.R. Rehmann
Wahl T.L.Pugh C.A.Oberg K.A.Vermeyen T.B.Wahl T.L.Pugh C.A.Oberg K.A.Vermeyen T.B., editor(s)
2002, Conference Paper, Hydraulic Measurements and Experimental Methods
Acoustic Doppler current profilers (ADCPs) provide a promising method for measuring surface-water turbulence because they can provide data from a large spatial range in a relatively short time with relative ease. Some potential sources of errors in turbulence measurements made with ADCPs include inaccuracy of Doppler-shift measurements, poor temporal and...
Scaup migration patterns in North Dakota relative to temperatures and water conditions
J. E. Austin, D. A. Granfors, M. A. Johnson, S. C. Kohn
2002, Journal of Wildlife Management (66) 874-882
Greater (Aythya marila) and lesser scaup (A. affinis) have protracted spring migrations. Migrants may still be present on southern breeding areas when the annual Waterfowl Breeding Population and Habitat Surveys (WBPHS) are being conducted. Understanding factors affecting the chronology and rate of spring migration is important for the interpretation of...
