Reproductive ecology of the Maui Parrotbill
John C. Simon, Thane K. Pratt, Kim E. Berlin, James R. Kowalsky
2000, The Wilson Bulletin (112) 482-490
The endangered Maui Parrotbill (Pseudonestor xanthophrys) is an excavating, insectivorous Hawaiian honeycreeper endemic to the high elevation rain forests of east Maui, Hawaii. From March 1994 to June 1997, we studied various aspects of their breeding ecology. We color-banded 18 individuals, located and monitored 9 active nests, and...
Grassland bird use of Conservation Reserve Program Fields in the Great Plains
Douglas H. Johnson
2000, Technical Report USDA/NRCS/WHMI-2000
The area enrolled in the Conservation Reserve Program in the Great Plains is enormous: nearly 18 million acres, or more than 7 million hectares, in Montana, North Dakota, South Dakota, Wyoming, Nebraska, Colorado, Kansas, Oklahoma, and Texas. This change in land use has had a huge influence on grassland bird...
206Pb-230Th-234U-238U and 207Pb-235U geochronology of Quaternary opal, Yucca Mountain, Nevada
Leonid A. Neymark, Yuri V. Amelin, James B. Paces
2000, Geochimica et Cosmochimica Acta (64) 2913-2928
U–Th–Pb isotopic systems have been studied in submillimeter-thick outermost layers of Quaternary opal occurring in calcite–silica fracture and cavity coatings within Tertiary tuffs at Yucca Mountain, Nevada, USA. These coatings preserve a record of paleohydrologic conditions at this site, which is being evaluated as a potential high-level nuclear waste repository....
Characterization methods for fractured glacial tills
R.J. Haefner
2000, Ohio Journal of Science (100) 73-87
This paper provides a literature review of methods successfully employed to characterize finegrained and fractured or unfractured glacial deposits. Descriptions and examples are given for four major categories of characterization methods: physical, hydraulic, chemical, and indirect. Characterization methods have evolved significantly within the past ten years; however, there still exists...
Using presence of sign to measure habitats used by Roosevelt elk
Floyd W. Weckerly, Mark A. Ricca
2000, Wildlife Society Bulletin (28) 146-153
tract Radiotelemetry and pellet-group surveys are methods used commonly to measure habi- tat use by large ungulates. However, telemetry can be expensive and analysis of data col- lected from pellet-group surveys is restricted to rank analysis. We explored the feasibil- ity of recording the presence of Roosevelt elk (Cervus elaphus...
Evapotranspiration from a bulrush-dominated wetland in the Klamath Basin, Oregon
W. R. Bidlake
2000, Journal of the American Water Resources Association (36) 1309-1320
Growing-season evapotranspiration and surface energy and water balances were investigated for an extensive, bulrush-dominated wetland in the Upper Klamath National Wildlife Refuge of south-central Oregon, a semi-arid region with competing demands for scarce water resources. Turbulent fluxes of sensible and latent heat were measured by eddy covariance for 1.2 to...
Multiphase flow of the late Wisconsinan Cordilleran ice sheet in western Canada
A.J. Stumpf, B.E. Broster, V.M. Levson
2000, Geological Society of America Bulletin (112) 1850-1863
In central British Columbia, ice flow during the late Wisconsinan Fraser glaciation (ca. 25–10 ka) occurred in three phases. The ice expansion phase occurred during an extended period when glaciers flowed westward to the Pacific Ocean and east-southeastward onto the Nechako Plateau from ice centers in the Skeena, Hazelton, Coast,...
Quantifying urban intensity in drainage basins for assessing stream ecological conditions
G. McMahon, T. F. Cuffney
2000, Journal of the American Water Resources Association (36) 1247-1261
Three investigations are underway, as part of the U.S. Geological Survey's National Water-Quality Assessment (NAWQA) Program, to study the relation between varying levels of urban intensity in drainage basins and in-stream water quality, measured by physical, chemical, and biological factors. These studies are being conducted in the vicinities of Boston...
Development of a grid-cell topographic surface for Okefenokee Swamp, Georgia
Cynthia S. Loftin, Wiley Rasberry, Wiley M. Kitchens
2000, Wetlands (20) 487-499
The Okefenokee Swamp is a 160,000 ha freshwater wetland in Southeast Georgia, USA that developed in a landscape basin. Hydrologic variability across the swamp suggests that water-surface elevations are not uniform across the swamp. The topographic surface map discussed herein was developed to describe the swamp topography at local to...
An analysis of the pilot point methodology for automated calibration of an ensemble of conditionally simulated transmissivity fields
Richard L. Cooley
2000, Water Resources Research (36) 1159-1163
An analysis of the pilot point method for automated calibration of an ensemble of conditionally simulated transmissivity fields was conducted on the basis of the simplifying assumption that the flow model is a linear function of log transmissivity. The analysis shows that the pilot point and conditional simulation method of...
Genetic analysis of hatchery and wild fall-run Chinook salmon (Oncorhynchus tshawystcha) in the Central Valley, California
O.J. Avelino, L. Nielsen
2000, Technical Report FG8002-IF
Relations of habitat-specific algal assemblages to land use and water chemistry in the Willamette Basin, Oregon
K.D. Carpenter, I.R. Waite
2000, Conference Paper, Environmental Monitoring and Assessment
Benthic algal assemblages, water chemistry, and habitat were characterized at 25 stream sites in the Willamette Basin, Oregon, during low flow in 1994. Seventy-three algal samples yielded 420 taxa - Mostly diatoms, blue-green algae, and green algae. Algal assemblages from depositional samples were strongly dominated by diatoms (76% mean relative...
A preliminary report on the 1999 Chi-Chi (Taiwan) earthquake
T. C. Shin, K.W. Kuo, W.H.K. Lee, T.L. Teng, Y.B. Tsai
2000, Seismological Research Letters (71) 24-30
No abstract available....
Wintering greater scaup as biomonitors of metal contamination in federal wildlife refuges in the Long Island Region
J.B. Cohen, J.S. Barclay, A.R. Major, J.P. Fisher
2000, Archives of Environmental Contamination and Toxicology (38) 83-92
Tissues of greater scaup (Aythya marila mariloides) and components of their habitat (sediment, plankton, macroalgae, and invertebrates) were collected for heavy metal analysis in the winter of 1996-97 from US Department of the Interior wildlife refuges in the Long Island region. Geographic and temporal relationships between the concentration of nine...
The Cooperative Wildlife Research Unit and wildlife education: Historic development, future challenges
John A. Bissonette, Cynthia S. Loftin, David M. Leslie Jr., L. A. Nordstrom, W. James Fleming
2000, Wildlife Society Bulletin (28) 534-541
In 1932, J. N. 'Ding' Darling proposed a 3-year tripartite arrangement between the Iowa Fish and Game Commission, Iowa State University, and himself to establish the first Cooperative Wildlife Research Unit. Three years later, the Cooperative Wildlife Research Unit Program was broadened to include 9 land-grant colleges representing recognized ecoregions...
Moment-tensor solutions estimated using optimal filter theory: Global seismicity, 1998
S.A. Sipkin, C. G. Bufe, M.D. Zirbes
2000, Physics of the Earth and Planetary Interiors (118) 169-179
Moment-tensor solutions, estimated using optimal filter theory, are listed for 204 moderate-to-large size earthquakes that occurred during 1998. (C) 2000 Published by Elsevier Science B.V....
Detection of crystalline hematite mineralization on Mars by the Thermal Emission Spectrometer: evidence for near-surface water
P. R. Christensen, J. L. Bandfield, R. N. Clark, K.S. Edgett, V.E. Hamilton, T. Hoefen, H. H. Kieffer, R.O. Kuzmin, M. D. Lane, M. C. Malin, R.V. Morris, J.C. Pearl, R. Pearson, T. L. Roush, S. W. Ruff, M. D. Smith
2000, Journal of Geophysical Research E: Planets (105) 9623-9642
The Thermal Emission Spectrometer (TES) instrument on the Mars Global Surveyor (MGS) mission has discovered a remarkable accumulation of crystalline hematite (α-Fe2O3) that covers an area with very sharp boundaries approximately 350 by 350–750 km in size centered near 2°S latitude between 0° and 5°W longitude (Sinus Meridiani). Crystalline hematite...
New records of sylvatic plague in Kansas
J.F. Cully Jr., L.G. Carter, K.L. Gage
2000, Journal of Wildlife Diseases (36) 389-392
Sylvatic plague, or plague of wild rodents is caused by Yersinia pestis and entered California (USA) from Asia about 1899. Extensive sampling during the 1930's and 1940's documented the spread of plague to approximately its current distribution in North America. Records from the Centers for Disease Control and Prevention document plague in...
Sedimentary and upper crustal structure of Australia from receiver functions
G. Clitheroe, O. Gudmundsson, B.L.N. Kennett
2000, Australian Journal of Earth Sciences (47) 209-216
The initial coda of teleseismic P-waves contains considerable information about the crust and upper mantle structure directly beneath a receiver. When this information can be recovered for a dense network of seismographs much can be learned about the structure of the earth. Data from the high quality broadband seismic stations...
Atmospheric nitrogen in the Mississippi River Basin: Amissions, deposition and transport
G.B. Lawrence, D. A. Goolsby, W.A. Battaglin, G.J. Stensland
2000, Science of Total Environment (248) 87-100
Atmospheric deposition of nitrogen has been cited as a major factor in the nitrogen saturation of forests in the north-eastern United States and as a contributor to the eutrophication of coastal waters, including the Gulf of Mexico near the mouth of the Mississippi River. Sources of nitrogen emissions and the...
Environmental history and tephrostratigraphy at Carp Lake, southwestern Columbia Basin, Washington, USA
C. Whitlock, A.M. Sarna-Wojcicki, P. J. Bartlein, R.J. Nickmann
2000, Conference Paper, Palaeogeography, Palaeoclimatology, Palaeoecology
Sediment cores from Carp Lake provide a pollen record of the last ca. 125,000 years that helps disclose vegetational and climatic conditions from the present day to the previous interglaciation (120-133 ka). The core also contained 15 tephra layers, which were characterised by electron-microprobe analysis of volcanic glass shards. Identified...
Plants as indicators of focused ground water discharge to a northern Minnesota lake
D.O. Rosenberry, Robert G. Striegl, D.C. Hudson
2000, Ground Water (38) 296-303
Determining the discharge of ground water to Shingobee Lake (66 ha), north-central Minnesota, is complicated by the presence of numerous springs situated adjacent to the lake and in the shallow portion of the lakebed. Springs first had to be located before these areas of more rapid discharge could be quantified....
Distribution of metals during digestion by cutthroat trout fed benthic invertebrates contaminated in the Clark Fork River, Montana and the Coeur d'Alene River, Idaho, U.S.A., and fed artificially contaminated Artemia
A.M. Farag, M.J. Suedkamp, J.S. Meyer, R. Barrows, D. F. Woodward
2000, Journal of Fish Biology (56) 173-190
The concentrations of essential amino acids in three, undigested invertebrate diets collected from the Clark Fork River (CFR) for cutthroat trout were similar to each other, but were c. 25–75% less than Artemia that were exposed to a mixture of arsenic, copper, cadmium, lead and zinc in the laboratory. The...
Effects of water conditions on clutch size, egg volume, and hatchling mass of mallards and gadwalls in the Prairie Pothole Region
P.J. Pietz, Gary L. Krapu, D. A. Buhl, D.A. Brandt
2000, Condor (102) 936-940
We examined the relationship between local water conditions (measured as the percent of total area of basins covered by water) and clutch size, egg volume, and hatchling mass of Mallards (Anas platyrhynchos) and Gadwalls (A. strepera) on four study sites in the Prairie Pothole Region of North Dakota and Minnesota,...
Landscape correlates of breeding bird richness across the United States mid-Atlantic region
K. Bruce Jones, Anne Neale, Nash Maliha, Kurt H. Riitters, James D. Wickham, Robert V. O’Neill, Rick D. van Remortel
2000, Conference Paper, Environmental Monitoring and Assessment
Using a new set of landscape indicator data generated by the U.S.EPA, and a comprehensive breeding bird database from the National Breeding Bird Survey, we evaluated associations between breeding bird richness and landscape characteristics across the entire mid-Atlantic region of the United States. We evaluated how these relationships varied among...
