Evidence of Emperor Geese breeding in Russia and staging in Alaska
Joel A. Schmutz, Alexander V. Kondratyev
1995, The Auk (112) 1037-1038
Emperor Geese (Chen canagica) breed primarily on the Yukon-Kuskokwim Delta, Alaska (Eisenhauer and Kirkpatrick 1977), but a small, poorly quantified proportion of the world's population is known to breed in the Russia Far East (Kistchinski 1976, 1988, Portenko 1981). Eisenhauer and Kirkpatrick (1977) stated that 80 to 90% of all...
Use of isotopic data to estimate water residence times of the Finger Lakes, New York
Robert L. Michel, Thomas F. Kraemer
1995, Journal of Hydrology (164) 1-18
Water retention times in the Finger Lakes, a group of 11 lakes in central New York with similar hydrologic and climatic characteristics, were estimated by use of a tritium-balance model. During July 1991, samples were collected from the 11 lakes and selected tributary streams and were analyzed for tritium, deuterium,...
Characteristics of vegetation phenology over the Alaskan landscape using AVHRR time-series data
Carl J. Markon, Michael D. Fleming, Emily F. Binnian
1995, Polar Record (31) 179-190
Advanced Very High Resolution Radiometer (AVHRR) satellite data were acquired and composited into twice-a-month periods from 1 May 1991 to 15 October 1991 in order to map vegetation characteristics of the Alaskan landscape. Unique spatial and temporal qualities of the AVHRR data...
Using effort information with change-in-ratio data for population estimation
Mark S. Udevitz, Kenneth H. Pollock
1995, Biometrics (51) 471-481
Most change-in-ratio (CIR) methods for estimating fish and wildlife population sizes have been based only on assumptions about how encounter probabilities vary among population subclasses. When information on sampling effort is available, it is also possible to derive CIR estimators based on assumptions about how encounter probabilities vary over time....
A survey of recent results in passive sampling of water and air by semipermeable membrane devices
Harry F. Prest, James N. Huckins, Jimmie D. Petty, Sirpa Herve, Jaakko Paasivirta, Pertti Heinonen
1995, Marine Pollution Bulletin (31) 306-312
A survey is presented of some recent results for passive sampling of water and air for trace organic contaminants using lipid-filled semipermeable membrane devices (SPMDs). Results of water sampling for trace organochlorine compounds using simultaneously exposed SPMDs and the most universally applied biomonitor (bivalves) are discussed. In general, the total...
Census methodologies of Black-legged Kittiwakes in Glacier Bay National Park
Elizabeth Ross Hooge
Daniel R. Engstrom, editor(s)
1995, Conference Paper, Proceedings of the third Glacier Bay science symposium
Black-legged Kittiwakes (Rissa tridactyla) have recently experienced widespread population declines and frequent colony failures throughout the North Pacific. At Glacier Bay National Park, the Margerie Glacier colony was censused visually in 1991 through 1993. In 1993 a new photographic census technique was also tested to assess its feasibility, accuracy, and...
Hydrologic effects of increased urbanization
Joel R. Guay
Espey William H.Combs Phil G., editor(s)
1995, Conference Paper, International Water Resources Engineering Conference - Proceedings
Urban areas in Perris Valley, California, have more than tripled during the last 20 years, resulting in increased storm-runoff volumes and peak discharges. To quantify the effects of increased urbanization, rainfall-runoff models of the basin were developed to simulate runoff for 1970-75 and 1990-93 conditions. Hourly rainfall data for 1949-93...
Captive propagation, introduction, and translocation programs for wildlife vertebrates
F. Joshua Dein, Kathryn A. Converse, Christy Wolf
Edward T. LaRoe, Gaye S. Farris, Catherine E. Puckett, Peter D. Doran, Michael J. Mac, editor(s)
1995, Book chapter, Our living resources: A report to the nation on the distribution, abundance, and health of U.S. plants, animals, and ecosystems
Captive propagation, introduction, and translocation (relocation) programs for many animals have been undertaken by federal, state, and private agencies for more than 20 years. These programs help aid the recovery of endangered and threatened species, reestablish lost species, augment declining populations, increase recreational opportunities, reduce nuisance species, and introduce non-native...
Discrete fracture modeling-ESF North Portal Area, Yucca Mountain Nevada
Lawrence O. Anna
Hughes Howard R., editor(s)
1995, Conference Paper, High Level Radioactive Waste Management - Proceedings of the Annual International Conference
Statistical parameters from three-dimensional fracture network and hydraulic parameters were developed to be used in site scale models. This approach utilizes geometric fracture models and assess their impact on flow characteristics and parameters. Laboratory and field-testing data will be integrated to calibrate the flow models and to determine sensitivities of...
Channel degradation in southeastern Nebraska Rivers
Kenneth L. Wahl, Linda S. Weiss
Ward Rim J., editor(s)
1995, Conference Paper, Watershed Management Symposium - Proceedings
Many stream channels in southeastern Nebraska were dredged and straightened during 1904-15. The resulting channels were both shorter and steeper than the original channels. Tests for time trends were conducted using the nonparametric Kendall tau test to see if the channels have responded to these changes. Tests were conducted on...
Assessment of forest fragmentation in southern New England using remote sensing and geographic information systems technology
James E. Vogelmann
1995, Conservation Biology (9) 439-449
Spatial patterns and rates of forest fragmentation were assessed using digital remote sensing data for a region in southern New England that included 157 townships in southern New Hampshire and northeastern Massachusetts. The study area has undergone marked population increases over the last several decades. Following classification of 1973 and...
Effects of empirical versus model-based reflectance calibration on automated analysis of imaging spectrometer data: a case study from the Drum Mountains, Utah
John L. Dwyer, Fred A. Kruse, Adam B. Lefkoff
1995, Photogrammetric Engineering and Remote Sensing (61) 1247-1254
Data collected by the Airborne Visible/Infrared Imaging Spectrometer (AVIRIS) have been calibrated to surface reflectance using an empirical method and an atmospheric model-based method. Single spectra extracted from both calibrated data sets for locations with known mineralogy compared favorably with laboratory and field spectral measurements of samples from the same...
Precipitation depth-duration characteristics, Antelope Valley, California
James C. Blodgett, Iraj Nasseri
Espey William H.Combs Phil G., editor(s)
1995, Conference Paper, International Water Resources Engineering Conference - Proceedings
To document the changes in runoff characteristics of basins subject to urbanization, streamflow and precipitation data were collected at eight small basins in Antelope Valley, California, for the period 1990-93. The data collected at U.S. Geological Survey stations were supplemented by data collected at 35 long-term precipitation stations. These data...
Estimation of survival of adult Florida manatees in the Crystal River, at Blue Spring, and on the Atlantic Coast
Thomas J. O'Shea, Catherine A. Langtimm
Thomas J. O'Shea, B.B. Ackerman, H. Franklin Percival, editor(s)
1995, Information and Technology Report 1
We applied Cormack-Jolly-Seber open population models to manatee (Trichechus manatus latirostris) photo-identification databases to estimate adult survival probabilities. The computer programs JOLLY and RECAPCO were used to estimate survival of 677 individuals in three study areas: Crystal River (winters 1977-78 to 1990-91), Blue Spring (winters 1977-78 to 1990-91), and the...
Ecology and conservation of the Marbled Murrelet in North America: An overview
C. John Ralph, George L. Hunt Jr., Martin G. Raphael, John F. Piatt
1995, Book chapter, Ecology and conservation of the Marbled Murrelet (USDA Forest Service General Technical Report PSW-GTR-152)
Over the past decade, the Marbled Murrelet has become a focus of much controversy. It was listed as threatened in Washington, Oregon, and California by the U.S. Fish and Wildlife Service in February 1993. In order to aid the various agencies with management, the Marbled Murrelet Conservation Assessment was formed...
Mission in the works promises precise global topographic data
T. Farr, D. Evans, H. Zebker, D. Harding, J. Bufton, T. Dixon, S. Vetrella, D.B. Gesch
1995, Eos, Transactions, American Geophysical Union (76) 225-229
Significant deficiencies in the quality of today's topographic data severely limit scientific applications. Very few available data sets meet the stringent requirements of 10–30 m for global digital topography and 5 m or better vertical accuracy, and existing satellite systems are unlikely to fulfill these requirements. The Joint Topographic Science...
Advanced instrumentation for the collection, retrieval, and processing of urban stormwater data
Jerald B. Robinson, Jerad D. Bales, Wendi S. Young
Espey William H.Combs Phil G., editor(s)
1995, Conference Paper, International Water Resources Engineering Conference - Proceedings
The U.S. Geological Survey, in cooperation with the City of Charlotte and Mecklenburg County, North Carolina, has developed a data-collection network that uses advanced instrumentation to automatically collect, retrieve, and process urban stormwater data. Precipitation measurement and water-quality networks provide data for (1) planned watershed simulation models, (2) early warning...
Map projections for global and continental data sets and an analysis of pixel distortion caused by reprojection
Daniel R. Steinwand, John A. Hutchinson, J.P. Snyder
1995, Photogrammetric Engineering and Remote Sensing (61) 1487-1497
In global change studies the effects of map projection properties on data quality are apparent, and the choice of projection is significant. To aid compilers of global and continental data sets, six equal-area projections were chosen: the interrupted Goode Homolosine, the interrupted Mollweide,...
Mapping the response of riparian vegetation to possible flow reductions in the Snake River, Idaho
W. Carter Johnson, Mark D. Dixon, Robert W. Simons, Susan Jenson, Kevin Larson
1995, Geomorphology (13) 159-173
This study was initiated to determine the general effects of potential flow reductions in the middle Snake River (Swan Falls Dam downstream to the Idaho-Oregon border) on its riparian vegetation. Considerable water from the river is currently used to irrigate the adjacent Snake River Plain, and increased demand for water...
Mapping tide-water glacier dynamics in east Greenland using landsat data
John L. Dwyer
1995, Journal of Glaciology (41) 584-595
Landsat multispectral scanner and thematic mapper images were co-registered For the Kangerdlugssuaq Fjord region in East Greenland and were used to map glacier drainage-basin areas, changes in the positions of tide-water glacier termini and to estimate surface velocities of the larger tide-water glaciers. Statistics were compiled to document distance and...
Common ravens in the southwestern United States, 1968-92
William I. Boarman, Kristin H. Berry
Edward T. LaRoe, Gaye S. Farris, Catherine E. Puckett, Peter D. Doran, Michael J. Mac, editor(s)
1995, Book chapter, Our living resources: A report to the nation on the distribution, abundance, and health of U.S. plants, animals, and ecosystems
The common raven (Corvus corax) is a large black passerine bird found throughout the northern hemisphere including western and northern North America. Ravens are scavengers that frequently feed on road-killed animals, large dead mammals, and human refuse. They kill and eat prey including rodents, lambs (Larsen and Dietrich 1970), birds,...
Measurements in the bottom boundary layer on the Amazon subaqueous delta
D.A. Cacchione, D.E. Drake, R.W. Kayen, R.W. Sternberg, G.C. Kineke, G. B. Tate
1995, Marine Geology (125) 235-257
An instrumented bottom tripod (GEOPROBE) recorded flow and suspended sediment data in the bottom boundary layer above the lower foresets of the Amazon subaqueous delta in 65 m mean water depth in February, 1990. After about two weeks of operation the apparent seafloor at the tripod site rapidly elevated over...
Investigation of aquifer-system compaction in the Hueco basin, El Paso, Texas, USA
Charles Heywood
1995, Conference Paper, IAHS-AISH Publication
The Pleistocene geologic history of the Rio Grande valley in the Hueco basin included a cycle of sediment erosion and re-aggradation, resulting in unconformable stratification of sediment of contrasting compressibility and stress history. Since the 1950s large groundwater withdrawals have resulted in significant water-level declines and associated land subsidence. Knowledge...
Depth to pre-Cenozoic basement in Southwest Nevada
V.E. Langenheim, D. A. Ponce
Hughes Howard R., editor(s)
1995, Conference Paper, High Level Radioactive Waste Management - Proceedings of the Annual International Conference
An iterative procedure based on gravity data, surface geology, and an estimated density-depth function was used to estimate the depth to pre-Cenozoic basement at Yucca Mountain and vicinity....
The effect of fault-bend folding on seismic velocity in the marginal ridge of accretionary prisms
Y. Cai, Chun-Yong Wang, W.-t. Hwang, G.R. Cochrane
1995, Pure and Applied Geophysics PAGEOPH (145) 637-646
Fluid venting in accretionary prisms, which feeds chemosynthetic biological communities, occurs mostly on the marginal thrust ridge. New seismic data for the marginal ridge of the Cascadia prism show significantly lower velocity than that in the adjacent oceanic basin and place important constraints on the interpretations of why fluid venting...
