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...
Geodetic imaging: Reservoir monitoring using satellite interferometry
D.W. Vasco, C. Wicks Jr., K. Karasaki, O. Marques
2002, Geophysical Journal International (149) 555-571
Fluid fluxes within subsurface reservoirs give rise to surface displacements, particularly over periods of a year or more. Observations of such deformation provide a powerful tool for mapping fluid migration within the Earth, providing new insights into reservoir dynamics. In this paper we use Interferometric Synthetic Aperture Radar (InSAR) range...
A passive microwave snow depth algorithm with a proxy for snow metamorphism
E.G. Josberger, N. M. Mognard
2002, Hydrological Processes (16) 1557-1568
Passive microwave brightness temperatures of snowpacks depend not only on the snow depth, but also on the internal snowpack properties, particularly the grain size, which changes through the winter. Algorithms that assume a constant grain size can yield erroneous estimates of snow depth or water equivalent. For snowpacks that are...
A Holocene paleosecular variation from 14C-dated volcanic rocks in western North America
Jonathan T. Hagstrum, Duane E. Champion
2002, Journal of Geophysical Research B: Solid Earth (107) EPM 8-1-EPM 8-14
A paleosecular variation (PSV) curve for western North America is presented on the basis of 94 virtual geomagnetic poles (VGPs) from dated volcanic rocks sampled at 446 sites. Approximately 60% of the paleomagnetic database has been previously published. A curve defined by “spherical smoothed splines” is fitted to the VGPs,...
Influence of fracture anisotropy on ground water ages and chemistry, Valley and Ridge province, Pennsylvania
W.C. Burton, Niel Plummer, E. Busenberg, B.D. Lindsey, W.J. Gburek
2002, Ground Water (40) 242-257
Model ground water ages based on chlorofluorocarbons (CFCs) and tritium/helium-3 (3H/3He) data were obtained from two arrays of nested piezometers located on the north limb of an anticline in fractured sedimentary rocks in the Valley and Ridge geologic province of Pennsylvania. The fracture geometry of the gently east plunging fold...
Partial entrainment of gravel bars during floods
Christopher P. Konrad, Derek B. Booth, Stephen J. Burges, David R. Montgomery
2002, Water Resources Research (38) 9-1-9-16
Spatial patterns of bed material entrainment by floods were documented at seven gravel bars using arrays of metal washers (bed tags) placed in the streambed. The observed patterns were used to test a general stochastic model that bed material entrainment is a spatially independent, random process where the probability of...
Predator-prey interactions in The Dalles Dam tailrace
I.N. Duran, T.L. Liedtke, J.H. Petersen
2002, Report
Abstract not available ...
Last interglacial climates
G.J. Kukla, M.L. Bender, J. #NAME? de Beaulieu, G. Bond, W.S. Broecker, P. Cleveringa, J.E. Gavin, T.D. Herbert, J. Imbrie, J. Jouzel, L.D. Keigwin, Kathy L. Knudsen, J.F. McManus, J. Merkt, D.R. Muhs, H. Muller, R.Z. Poore, S.C. Porter, G. Seret, N. J. Shackleton, C. Turner, P.C. Tzedakis, I.J. Winograd
2002, Quaternary Research (58) 2-13
The last interglacial, commonly understood as an interval with climate as warm or warmer than today, is represented by marine isotope stage (MIS) 5e, which is a proxy record of low global ice volume and high sea level. It is arbitrarily dated to begin at approximately 130,000 yr B.P. and...
Passage behavior of radio-tagged yearling Chinook salmon and steelhead at Bonneville Dam 2002
S.D. Evans, L.S Wright, C. D. Smith, R.E. Wardell, N.S. Adams, D.W. Rondorf
2002, Report
Abstract not available ...
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...
White sturgeon mitigation and restoration in the Columbia and Snake rivers upstream from Bonneville Dam. Report C
D.M. Gadomski, M.J. Parsley, D.G. Gallion, P. Kofoot
2002, Report
Abstract not available ...
Mercury in vegetation and soils at abandoned mercury mines in southwestern Alaska, USA
E. A. Bailey, J. E. Gray, P. M. Theodorakos
2002, Geochemistry: Exploration, Environment, Analysis (2) 275-285
We chemically analysed vegetation (willow and alder) and soil samples collected at three abandoned mercury (Hg) mines and at background sites in southwestern Alaska and compared Hg concentrations, speciation and distribution. Total Hg and methylmercury (MeHg) concentrations were higher in vegetation and soil samples from all the mine sites compared...
Diet, distribution and life history of Neomysis mercedis in John Day Reservoir of the Columbia River (USA)
C. A. Haskell, J. A. Stanford
2002, Open-File Report 169-02
No abstract available....
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...
New Publications of the U.S. Geological Survey, April-June 2002
Water Resources Division, U.S. Geological Survey
2002, Report
A list of USGS publications and articles by U.S. Geological Survey personnel in non-U.S. Geological Survey journals and books that were published in April to June of the year 2002....
Survival potential of herring in Puget Sound
P.K. Hershberger, R. M. Kocan
2002, Report
Abstract not available...
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...
Distributions and abundances of larval salamanders (Ambystoma macrodactylum) and large copepods (Diaptomus sp.) in relation to introduced trout and abiotic factors in mountain lakes of North Cascades National Park Service Complex
W.J. Liss, G.L. Larson, L.M. Ganio, T.J. Tyler, R.L. Hoffman
2002, Report, Ecological impact of introduced trout on native aquatic communities in mountain lakes: Phase III Final Report
Abstract not available ...
Feasibility of using 3D acoustic telemetry to assess the response of resident salmonids to strobe lights in Lake Roosevelt, WA
R.W. Perry, M.J. Farley, T.J. Darland, G.S. Hansen, D.H. Feil, D.W. Rondorf, R. LeCaire
2002, Report
Abstract not available ...
Compensatory feeding following a predator removal program: detection and mechanisms
J.H. Petersen
2002, Report
Abstract not available...
Migration behavior of radio-tagged juvenile Chinook salmon and steelhead relative to the performance of a removable spillway weir at Lower Granite Dam, Washington 2002
J.M. Plumb, A.C. Braatz, J.N. Lucchesi, S.D. Fielding, J.M. Sprando, G.T. George, N.S. Adams, D.W. Rondorf
2002, Report
Abstract not available...
Re-analysis of a banding study to test the effects of an experimental increase in bag limits of mourning doves
David L. Otis, Gary C. White
2002, Journal of Applied Statistics (29) 479-495
In 1966-1971, eastern US states with hunting seasons on mourning doves (Zenaida macroura) participated in a study designed to estimate the effects of bag limit increases on population survival rates. More than 400 000 adult and juvenile birds were banded and released during this period, and subsequent harvest and return...
In‐stream sorption of fulvic acid in an acidic stream: A stream‐scale transport experiment
Diane M. McKnight, George M. Hornberger, Kenneth E. Bencala, Elizabeth W. Boyer
2002, Water Resources Research (38) 6-1-6-12
The variation of concentration and composition of dissolved organic carbon (DOC) in stream waters cannot be explained solely on the basis of soil processes in contributing subcatchments. To investigate in‐stream processes that control DOC, we injected DOC‐enriched water into a reach of the Snake River (Summit County, Colorado) that has...
Model-based estimation of individual fitness
William A. Link, Evan G. Cooch, Emmanuelle Cam
2002, Journal of Applied Statistics (29) 207-224
Fitness is the currency of natural selection, a measure of the propagation rate of genotypes into future generations. Its various definitions have the common feature that they are functions of survival and fertility rates. At the individual level, the operative level for natural selection, these rates must be understood as...
Very-long-period volcanic earthquakes beneath Mammoth Mountain, California
David P. Hill, P. Dawson, M.J.S. Johnston, A. M. Pitt, G. Biasi, K. Smith
2002, Geophysical Research Letters (29) 8-1-8-4
Detection of three very‐long‐period (VLP) volcanic earthquakes beneath Mammoth Mountain emphasizes that magmatic processes continue to be active beneath this young, eastern California volcano. These VLP earthquakes, which occurred in October 1996 and July and August 2000, appear as bell‐shaped pulses with durations of one to two...
