Implications of water supply for indigenous Americans during Holocene ardity phases on the Southern High Plains, USA
W.W. Wood, S. Stokes, J. Rich
2002, Quaternary Research (58) 139-148
Springs in the 40 to 50 large lake basins (>15 km2) on the southern portion of the Southern High Plains (SHP) were active during periods of aridity in the Holocene when there may have been human habitation of the area. Eolian erosion of the lake floors and lunette accretion occurred...
Potential nontarget effects of Metarhizium anisopliae (Deuteromycetes) used for biological control of ticks (Acari: Ixodidae)
Howard S. Ginsberg, Roger A. LeBrun, Klaus Heyer, Elyes Zhioua
2002, Environmental Entomology (31) 1191-1196
The potential for nontarget effects of the entomopathogenic fungus Metarhizium anisopliae (Metschnikoff) Sorokin, when used for biological control of ticks, was assessed in laboratory trials. Fungal pathogenicity was studied against convergent ladybird beetles, Hippodamia convergens Guérin-Méneville, house crickets, Acheta domesticus (L.), and the milkweed bugs Oncopeltus fasciatus (Dallas)....
Isotope-abundance variations of selected elements (IUPAC technical report)
T.B. Coplen, J.K. Böhlke, P. De Bievre, T. Ding, N.E. Holden, J.A. Hopple, H.R. Krouse, A. Lamberty, H.S. Peiser, K. Revesz, S.E. Rieder, K.J.R. Rosman, E. Roth, P.D.P. Taylor, R.D. Vocke Jr., Y.K. Xiao
2002, Pure and Applied Chemistry (74) 1987-2017
Documented variations in the isotopic compositions of some chemical elements are responsible for expanded uncertainties in the standard atomic weights published by the Commission on Atomic Weights and Isotopic Abundances of the International Union of Pure and Applied Chemistry. This report summarizes reported variations in the isotopic compositions of 20...
Does bird community structure vary with landscape patchiness? A Chihuahuan Desert perspective
K.J. Gutzwiller, W.C. Barrow Jr.
2002, Oikos (98) 284-298
During the springs of 1995-1997, we studied birds and landscapes at 70 sites in the Chihuahuan Desert to assess relations between bird community structure and landscape patchiness. Within each of two spatial extents (1-kin and 2-km-radius areas centered on each site), we measured the number of patches of individual land-cover...
Subsidence at Kiska volcano, Western Aleutians, detected by satellite radar interferometry
Z. Lu, Timothy Masterlark, J. Power, D. Dzurisin, Charles Wicks
2002, Geophysical Research Letters (29) 2-1-2-4
Sequential interferometric synthetic aperture radar images of Kiska, the westernmost historically active volcano in the Aleutian arc, show that a circular area about 3 km in diameter centered near the summit subsided by as much as 10 cm from 1995 to 2001, mostly during 1999 and 2000. An elastic Mogi-type...
Genetic diversity in a morphologically conservative invasive taxon: Multiple introductions of swamp eels to the southeastern United States
T.M. Collins, J.C. Trexler, L.G. Nico, T.A. Rawlings
2002, Conservation Biology (16) 1024-1035
Genetic analysis of introduced populations, especially in morphologically conservative taxa, can clarify introduction histories, identify management units and source populations, provide a more realistic estimate of the frequency of successful invasion, and suggest strategies for preventing further introductions. In the last 7 years, populations of swamp eels, referred to the...
Evidence for the timing and duration of the last interglacial period from high-precision uranium-series ages of corals on tectonically stable coastlines
D.R. Muhs
2002, Quaternary Research (58) 36-40
The last interglacial period has a timing and duration that can be estimated from U-series dating of emergent, coral-bearing deposits on tectonically stable coastlines. High-precision dating from Bermuda, the Bahamas, Hawaii, and Australia suggests that the last interglacial period had a sea level at least as high as present from...
Effects of topography on the transport of agricultural chemicals to groundwater in a sand-plain setting
G. N. Delin, M.K. Landon
2002, Hydrogeology Journal (10) 443-454
Geochemical data were collected to investigate the effects of topography and focused recharge on the transport of agricultural chemicals to groundwater through sandy soils. The research was done at a topographically high (upland) site and a depressional (lowland) site within a corn field. Agricultural chemicals that move readily with water...
Comparison of soil bacterial communities in rhizospheres of three plant species and the interspaces in an arid grassland
Cheryl R. Kuske, Lawrence O. Ticknor, Mark E. Miller, John M. Dunbar, Jody A. Davis, Susan M. Barns, Jayne Belnap
2002, Applied and Environmental Microbiology (68) 1854-1863
Soil bacteria are important contributors to primary productivity and nutrient cycling in arid land ecosystems, and their populations may be greatly affected by changes in environmental conditions. In parallel studies, the composition of the total bacterial community and of members of the Acidobacterium division were assessed in arid grassland soils...
Did Nile flooding sink two ancient cities?
R. Said
2002, Nature (415) 37-38
[No abstract available]...
Modelling postfledging survival and age- specific breeding probabilities in species with delayed maturity: A case study of Roseate Terns at Falkner Island, Connecticut
J. A. Spendelow, J.D. Nichols, J.E. Hines, J.D. Lebreton, R. Pradel
2002, Journal of Applied Statistics (29) 385-405
We modelled postfledging survival and age-specific breeding probabilities in endangered Roseate Terns (Sterna dougallii) at Falkner Island, Connecticut, USA using capture-recapture data from 1988-1998 of birds ringed as chicks and as adults. While no individuals bred as 2-year-olds during this period, about three-quarters of the young that survived and returned...
Diversion of meltwater from Kautz Glacier initiates small debris flows near Van Trump Park, Mount Rainier, Washington
James W. Vallance, Carolyn L. Driedger, William E. Scott
2002, Washington Geology (30) 17-19
No abstract available....
American lifelines alliance efforts to improve electric power transmission reliability
S.P. Nishenko, W.U. Savage, D.G. Honegger, T.R. McLane
Jackman D.E.Jackman D.E., editor(s)
2002, Conference Paper, Proceedings of the Conference: Electrical Transmission in a New Age
A study was performed on American Lifelines Alliance (ALA) efforts to improve electric power transmission reliability. ALA is a public-private partnership project, with the goal of reducing risks to lifelines from natural hazards and human threat events. The mechanism used by ALA for developing national guidelines for lifeline systems is...
Topographic stress perturbations in southern Davis Mountains, west Texas 2. Hydrogeologic implications
R. H. Morin, W. Z. Savage
2002, Journal of Geophysical Research B: Solid Earth (107) ETG 6-1-ETG 6-10
As part of a regional groundwater investigation, geophysical logs were obtained in two municipal water wells located near the west Texas city of Alpine. These boreholes are 252 and 285 m deep and penetrate extrusive rocks of Tertiary age. The deeper well was drilled in the central valley and the...
Fragmentation: Is the message clear?
J.A. Bissonette, Ilse Storch
2002, Ecology and Society (6)
In this paper, we briefly discuss some of the fundamental problems arising from the inherent complexity of larger-scale ecological systems. We examine the tenuous assumption of a direct correspondence between ecological data and theory, we comment on a recent report that evaluated the efficacy of fragmentation experiments, and we briefly...
Conventional U-Pb dating versus SHRIMP of the Santa Barbara Granite Massif, Rondonia, Brazil
I. Sparrenberger, Jorge S. Bettencourt, R. M. Tosdal, J. L. Wooden
2002, Geologia USP - Serie Cientifica (2) 79-94
The Santa Ba??rbara Granite Massif is part of the Younger Granites of Rondo??nia (998 - 974 Ma) and is included in the Rondo??nia Tin Province (SW Amazonian Craton). It comprises three highly fractionated metaluminous to peraluminous within-plate A-type granite units emplaced in older medium-grade metamorphic rocks. Sn-mineralization is closely associated...
Rocky Mountain futures: An ecological perspective
Jill Baron, editor(s)
2002, Book
The Rocky Mountain West is largely arid and steep, with ecological scars from past human use visible for hundreds of years. Just how damaging were the past 150 years of activity? How do current rates of disturbance compare with past mining, grazing, and water diversion activities? In the face of...
Measurement of the bed material of gravel-bed rivers
R.T. Milhous
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
The measurement of the physical properties of a gravel-bed river is important in the calculation of sediment transport and physical habitat values for aquatic animals. These properties are not always easy to measure. One recent report on flushing of fines from the Klamath River did not contain information on one...
Monitoring giant garter snakes at Colusa National Wildlife Refuge: 2001 progress report
G.D. Wylie, Michael L. Casazza, N.M. Carpenter
2002, Report
No abstract available at this time...
Herpetofauna and Small Mammal Surveys on the Marine Corps Air Gound Combat Center, Twentynine Palms, CA. March 1999-October 2001
R. Hirsch, S. Hathaway, Robert N. Fisher
2002, Report
No abstract available at this time...
Description of nests, eggs, and nestlings of the endangered nightingale reed-warbler on Saipan, Micronesia
Stephen M. Mosher, Steven G. Fancy
2002, The Wilson Bulletin (114) 1-10
We describe the first verified nests, eggs, and nestlings of the Nightingale Reed-Warbler (Acrocephalus luscinia), an endangered species endemic to the Mariana Islands, Micronesia. Nest composition, nest dimensions, and eggs were studied on the island of Saipan. Nests were located within three habitat types: upland introduced tangantangan (Leucaena...
Evaluating options for revegetation following a catastrophic fire in a Pinyon-Juniper community at Grand Canyon/Parashaunt National Monument, Arizona. Report to USDI-Bureau of Land Management, Arizona Strip District, St. George, Utah
S.J. Scoles, T. C. Esque, L.A. DeFalco, S.E. Eckert, D.F. Haines
2002, Report
No abstract available at this time...
Evaluating remedial alternatives for an acid mine drainage stream: Application of a reactive transport model
R.L. Runkel, B. A. Kimball
2002, Environmental Science & Technology (36) 1093-1101
A reactive transport model based on one-dimensional transport and equilibrium chemistry is applied to synoptic data from an acid mine drainage stream. Model inputs include streamflow estimates based on tracer dilution, inflow chemistry based on synoptic sampling, and equilibrium constants describing acid/base, complexation, precipitation/dissolution, and sorption reactions....
Pilgrim Creek restoration project: bird community and vegetation structure
B.E. Kus, B. Peterson
2002, Report
No abstract available at this time...
Derivation of a tasselled cap transformation based on Landsat 7 at-satellite reflectance
Chengquan Huang, Bruce K. Wylie, Limin Yang, Collin G. Homer, G. Zylstra
2002, International Journal of Remote Sensing (23) 1741-1748
A new tasselled cap transformation based on Landsat 7 at-satellite reflectance was developed. This transformation is most appropriate for regional applications where atmospheric correction is not feasible. The brightness, greenness and wetness of the derived transformation collectively explained over 97% of the spectral variance of the individual scenes used in...
