Roosevelt elk density in old-growth forests of Olympic National Park
D.B. Houston, Bruce B. Moorhead, R.W. Olson
1987, Northwest Science (61) 220-225
We explored the feasibility of censusing Roosevelt elk from a helicopter in the dense old growth forests of Olympic National Park. WA. Mean observed densities ranged from 8.0-11.6 elk/km2, with coefficients of variation averaging 19.9 percent. A provisional sightability factor of 74 percent suggested that actual mean densities ranged from...
Satellites sense rangeland wildfire hazard (summary)
Donald Westover, Franklin G. Sadowski
1987, Fire Management Notes (48) 9-11
Each day, one or more National Oceanic and Atmospheric Administration (NOAA) satellites, passing over Nebraska, beam back to receiving stations on earth an enormous amount of information about what they sense below. The Nebraska Forest Service has been investigating the possible use of some of this information to evaluate the...
Evolutionary ecology and the optimality assumption
J.M. Emlen
1987, Book chapter, The Latest on the Best, Essays on Evolution and Optimality
No abstract available ...
Limnological and fishery studies on Lake Sharpe, a main-stem Missouri River reservoir, 1964-1975
F.C. June, L.G. Beckman, J.H. Elrod, G.K. O’Bryan, D.A. Vogel
1987, Report
No abstract available ...
Crude oil identification with electrothermal vaporization-multiple wavelength absorption spectrometry
J.M. Shekiro Jr., R. K Skogerboe, Howard E. Taylor
1987, Chemosphere (16) 983-988
A spectrometric technique utilizing electrothermal vaporization (graphite furnace) and gas phase-multiple wavelength absorption with photodiode array detection is used to characterize crude oil....
An inexpensive device for recording animal behavior
Craig R. Ely
1987, Wildlife Society Bulletin (15) 264-265
Recording animal behavior is tedious and time consuming when behaviors are recorded on tape and transcribed to data sheets. Data loggers circumvent these problems, but can be prohibitively expensive and may require extensive programming (see Hensler et al. [1986]). I describe an inexpensive, efficient alternative for recording behavioral observations....
Tectonic morphology of offshore Eel River basin, California
M.E. Field, J.V. Gardner, D.E. Drake, D.A. Caccione
1987, Conference Paper, Tectonics, sedimentation and evo lution of the Eel River and associated coastal basins of Northern California
No abstract available ...
Feeding activity, rate of consumption, daily ration, and prey selection of major predators in John Day Reservoir
T.P. Poe, D.E. Palmer, H.C. Hansel, S. Vigg, P.T. Lofy, S.D. Duke, M.J. Parsley, L.A. Prendergast, R. Burkhardt, C. Burley
1987, Report
No abstract available ...
Tolerance of juvenile fall Chinook salmon to selenium exposure from water and the food chain: impacts on smoltification and early marine survival
A.N. Palmisano
1987, Report
No abstract available ...
Dehydration of seabird prey during transport to the colony: Effects on wet weight energy densities
W.A. Montevecchi, John F. Piatt
1987, Canadian Journal of Zoology (65) 2822-2824
We present evidence to indicate that dehydration of prey transported by seabirds from capture sites at sea to chicks at colonies inflates estimates of wet weight energy densities. These findings and a comparison of wet and dry weight energy densities reported in the literature emphasize the importance of (i) accurate...
Cumulative impacts of oil fields on northern Alaskan landscapes
D.A. Walker, P.J. Webber, Emily F. Binnian, K.R. Everett, N.D. Lederer, E.A. Nordstrand, M.D. Walker
1987, Science (238) 757-761
Proposed further developments on Alaska's Arctic Coastal Plain raise questions about cumulative effects on arctic tundra ecosystems of development of multiple large oil fields. Maps of historical changes to the Prudhoe Bay Oil Field show indirect impacts can lag behind planned developments by many years and the total area eventually...
Resurrection Peninsula and Knight Island ophiolites and recent faulting on Montague Island, southern Alaska
Steven W. Nelson, Marti L. Miller, Julie A. Dumoulin
1987, Book chapter, Cordilleran section of the Geological Society of America: Centennial Field Guide volume 1
The Resurrection Peninsula forms the east side of Resurrection Bay (Fig. 1). The city of Seward is located at the head of the bay and can be reached from Anchorage by highway (127 mi;204 km). Relief ranges from 1,434 ft (437 m) at the southern end of the peninsula...
Solute geochemistry of the Snake River plain regional aquifer system, Idaho and eastern Oregon
Warren W. Wood, Walton H. Low
1987, Open-File Report 86-247
Three geochemical methods were used to determine chemical reactions that control solute concentrations in the Snake River Plain regional aquifer system: (1) Calculation of a regional solute balance within the aquifer and of mineralogy in the aquifer framework to identify solute reactions, (2) comparison of thermodynamic mineral saturation indices with...
Water use in the United States, 1980
Wayne Solley, Nancy L. Barber, Charles F. Merk
1987, Report
Eruptions of Hawaiian volcanoes : past, present, and future
Robert I. Tilling, Christina C. Heliker, Thomas L. Wright
1987, Report
Publications of the U.S. Geological Survey, 1986
Water Resources Division, U.S. Geological Survey
1987, Report
This catalog is a list of (1) books and mapsl that were published during 1986, and (2) articles by Geological Survey personnel in non-Geological Survey journals and books that came to our attention in 1986; it supplements the permanent catalogs "Publications of-.the Geological Survey, 1879-1961", "Publications of the Geological Survey,...
Modeling and analysis of direct-current electrical resistivity in the Durham Triassic basin, North Carolina
C. Erwin Brown
1987, Geoexploration (24) 429-440
Sixty-two Schlumberger electrical soundings were made in the Durham Triassic basin in an effort to determine basin structural geometry, depth of the sedimentary layers, and spatial distribution of individual rock facies. A digital computer program was used to invert the sounding curves of apparent resistivity versus distance to apparent resistivity...
Autumn staging of cackling Canada geese on the Alaska Peninsula
James S. Sedinger, Karen S. Bollinger
1987, Wildfowl (38) 13-18
Cackling Canada Geese Branta canadensis minima undergo a long (2,800 km) migration between their autumn staging areas on the Alaska Peninsula and wintering areas in Oregon and California. Adults and young lost an average of 543 g during this migratory flight. Weight gains between fledging and autumn migration are essential...
Phytoplankton productivity in relation to light intensity: A simple equation
D. H. Peterson, M.J. Perry, K.E. Bencala, M.C. Talbot
1987, Estuarine, Coastal and Shelf Science (24) 813-832
A simple exponential equation is used to describe photosynthetic rate as a function of light intensity for a variety of unicellular algae and higher plants where photosynthesis is proportional to (1-e−β1). The parameter β (=Ik−1">=Ik−1) is derived by a simultaneous curve-fitting method, where I is incident...
The Badain Jaran Desert: Remote sensing investigations.
A. S. Walker, J. W. Olsen, Bagen
1987, Geographical Journal (153) 205-210
Approximately half the Badain Jaran Desert in the north-western Alashan Plain of northern China is a sand sea. The remainder is gravel or bedrock. The north-western border of the desert is a playa. The desert has been imaged by both Landsat and the Shuttle Imaging Radar (SIR-A). Landsat analysis indicates...
Use of slope, aspect, and elevation maps derived from digital elevation model data in making soil surveys
A. A. Klingebiel, E. H. Horvath, D. G. Moore, W.U. Reybold
1987, Book chapter, Soil survey techniques, SSSA Special Publication 20
Maps showing different classes of slope, aspect, and elevation were developed from U.S. Geological Survey digital elevation model data. The classes were displayed on clear Mylar at 1:24 000-scale and registered with topographic maps and orthophotos. The maps were used with aerial photographs, topographic maps, and other resource data to...
Ground-water levels in the lower Paleozoic and Precambrian crystalline rocks, southeastern Chester County, Pennsylvania, July and August 1986
John A. Garges
1987, Water-Resources Investigations Report 86-4352
A water table contour map of the lower Paleozoic and Precambrian crystalline rocks of southeastern Chester County, Pennsylvania was constructed on the basis of water levels measured in 261 wells in July and August 1986, elevations of 11 springs that were flowing in July and August 1986, and water levels...
Sea-floor gouges caused by migrating gray whales off northern California
D.A. Cacchione, D.E. Drake, M.E. Field, G. B. Tate
1987, Continental Shelf Research (7) 553-560
Side-scan sonar records collected during March and April 1981 and 1982 off northern California contain elongate depressions whose sizes and shapes are similar to sea-floor gouges made by feeding gray whales (Eschrichtius robustus) in the northern Bering Sea and in shallow embayments off British Columbia. The discovery of the whale...
Adult survival and productivity of Northern Fulmars in Alaska
Scott A. Hatch
1987, The Condor (89) 685-696
The population dynamics of Northern Fulmars (Fulmarus glacialis) were studied at the Semidi Islands in the western Gulf of Alaska. Fulmars occurred in a broad range of color phases, and annual survival was estimated from the return of birds in the rarer plumage classes. A raw estimate of mean annual...
Aggressive encounters between tundra swans and greater white-fronted geese during brood rearing
Craig R. Ely, David A. Budeau, Una G. Swain
1987, The Condor (89) 420-422
Interspecific aggression in waterfowl (Anatidae) is relatively common (McKinney 1965; Kear 1972; Savard 1982, 1984), but interactions leading to mortality of one of the combatants are rarely-observed in the wild. A recent debate (Livezey and Humphrey 1985a, 1985b; Nuechterlein and Storer 1985a, 1985b; Murray 1985) has centered on the proximate...
