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...
Predicting baseflow alkalinity as an index to episodic stream acidification and fish presence
David R. DeWalle, Richard S. Dinicola, William E. Sharpe
1987, Journal of the American Water Resources Association (23) 29-35
Regression models to predict baseflow alkalinity from basin hydrogeology were developed and verified for headwater streams on the Laurel Hill anticline in southwestern Pennsylvania. Predicted baseflow alkalinities were then used to estimate sensitivity to acidification and presence of trout (Salvelinus fontinalis) populations for 61 headwater streams. Sensitivity classifications were verified...
Calculation of solar radiation in mountainous terrain
Alan L. Flint, S.W. Childs
1987, Agricultural and Forest Meteorology (40) 233-249
A study was performed to assess the accuracy of a daily solar radiation model for horizontal or sloping sites in terrain where surrounding ridges and tall trees block both direct beam and diffuse sky short wave radiation. To simulate adequately the major effects of these environments on radiation, the model...
Resource assessments, geologic deposit models, and offshore minerals with an example of heavy-mineral sands
Emil D. Attanasi, J. H. DeYoung, E. R. Force, Andrew Grosz
P. G. Teleki, M.R. Dobson, Jeffrey R. Moore, von Stackelberg U., editor(s)
1987, Book chapter, Marine minerals
A resource assessment method for offshore minerals based on descriptive and grade-tonnage models is proposed. Historical development and applications of this method are summarized. Based on this approach, descriptive and quantitative deposit models for strand-line titanium placer deposits have been developed. Descriptive statistics were also computed using the worldwide deposit...
Hydrogeology and ground-water use and quality, Brown County, Wisconsin
J. T. Krohelski, B.A. Brown
1986, Wisconsin Geological & Natural History Survey Information Circular 57
The Paleozoic rock of Brown County includes formations of Cambrian, Ordovician, and Silurian age. These formations are eastward-dipping sedimentary rock that rest on Precambrian crystalline rock and are overlain by Pleistocene deposits. The units that are the principal sources of ground water were grouped into three aquifers (upper, St. Peter,...
Powder X-ray diffraction of florencite-(Nd)
J. Fitzpatrick
1986, Powder Diffraction (1) 330-330
Florencite-(Nd) [(Nd,Ce)Al3(PO4)2(OH)6], was first described by Milton and Bastron (1971) from fracture surfaces in weathered cherts of the Franciscan Complex, south of Sausalito in Marin County, California. Florencite-(Nd) occurred there as a moderate-brown pulverulent earthy material; individual crystals were not discernible under microscopic examination. A semi-quantitative...
Water resources inventory of Connecticut Part 9: Farmington River basin
Elinor H. Handman, F. Peter Haeni, Mendall P. Thomas
1986, Connecticut Water Resources Bulletin 29
The Farmington River basin covers 435 square miles in north-central Connecticut upstream from Tariffville and downstream of the Massachusetts state line. Most water in the basin is derived from precipitation, which averages 48 inches (366 billion gallons) per year. An additional 67 billion gallons of water per year enters the...
Energy budget and prey requirements of breeding lapland longspurs Calcarius lapponicus near Barrow Alaska, U.S.A.
T. W. Custer, R. G. Osborn, F.A. Pitelka, J.A. Gessaman
1986, Arctic and Alpine Research (18) 415-428
Breeding Lapland longspurs, Calcarius lapponicus, near Barrow, Alaska, have relatively constant energy demands throughout the summer; the average estimated daily energy budgets (DEBs) were 132 and 118 kJ for the male and female. Thermoregulation accounted consistently for one-quarter to one-third of the total DEB. Flight in the male and incubation...
Liquid chromatography of hydrocarbonaeous quaternary amines on cyclodextrin bonded silica
S. L. Abidi
1986, Journal of Chromatography (362) 33-46
Mixtures of n-alkylbenzyldimethylammonium chloride (ABDAC) were resolved into homologous components by high-performance liquid chromatography (HPLC) with a cyclodextrin-bonded silica stationary phase. With a few exceptions, results from this study are similar to those obtained from traditional reversed-phase HPLC. It was found that the presence of electrolytes in aqueous mobile phases is not...
A kinematic model of southern California
R. Weldon, E. Humphreys
1986, Tectonics (5) 33-48
We propose a kinematic model for southern California based on late Quaternary slip rates and orientations of major faults in the region. Internally consistent motions are determined assuming that these faults bound rigid blocks. Relative to North America, most of California west of the San Andreas fault is moving parallel...
Analysis of utilization of desert habitats with dynamic simulation
B. Kenneth Williams
1986, Journal of Environmental Management (23) 1-18
The effects of climate and herbivores on cool desert shrubs in north-western Utah were investigated with a dynamic simulation model. Cool desert shrublands are extensively managed as grazing lands, and are defoliated annually by domestic livestock. A primary production model was used to simulate harvest yields and shrub...
Environmental contaminants in surrogates, foods, and feathers of California condors (Gymnogyps californianus)
Stanley N. Wiemeyer, R.M. Jurek, John F. Moore
1986, Environmental Monitoring and Assessment (6) 91-111
California condor (Gymnogyps californianus) foods and feathers, and turkey vultures (Cathartes aura), common ravens (Corvus corax), and their eggs were collected within the condor range to determine exposure of condors to environmental contaminants. Samples were analyzed for organochlorines and trace elements. Food items contained low concentrations of organochlorines and generally...
Nest-site biology of the California condor
N.F.R. Snyder, R.R. Ramey, F.C. Sibley
1986, Condor (88) 228-241
A study of 72 historical and recent nests of the California Condor (Gymnogyps californianus) has revealed considerable variability in nest-site characteristics. This paper primarily summarizes the data on nest elevations and dimensions, entrance orientations, nest longevity and re-use, vulnerability of sites to natural enemies, and use of sites by other...
Analysis of cyanide in whole blood of dosed cathartids
A. J. Krynitsky, Stanley N. Wiemeyer, E. F. Hill, J. W. Carpenter
1986, Environmental Toxicology and Chemistry (5) 787-789
A gas-liquid chromatographic method was modified to quantify both unmetabolized (“free”) and metabolized (“bound”, i.e., thiocyanates) cyanides. The methods for both are efficient and sensitive to 0.05 ppm. Repeated freezing and thawing of whole blood from treated cathartids caused an initial increase in free cyanide concentrations, followed by a gradual...
Sources of variation in extinction rates, turnover, and diversity of marine invertebrate families during the Paleozoic
J.D. Nichols, R.W. Morris, C. Brownie, K. H. Pollock
1986, Paleobiology (12) 421-432
We have recently shown how capture-recapture models can be used in conjunction with stratigraphic range data to estimate taxonomic extinction rates and taxonomic diversity. Here we present a new method that can be used to estimate taxonomic turnover (defined here as the proportion of taxa extant at...
An ecological model of the effects of exotic factors on limiting Hawaiian honeycreeper populations
Stephen Mountainspring
1986, Ohio Journal of Science (86) 95-100
Dieldrin and endrin residues in fulvous whistling-ducks in Texas in 1983
Edward L. Flickinger, C. A. Mitchell, A. J. Krynitsky
1986, Journal of Field Ornithology (57) 85-90
Fulvous Whistling-Ducks were collected near nesting areas in the rice fields of Texas in 1983 to determine if these birds continue to carry residue levels of organochlorine contaminants, and if the contaminants were acquired in Texas or Mexico. Adults were collected immediately after they arrived from wintering grounds and juveniles...
Modified milk carton nest box for studies of prothonotary warblers
W. James Fleming, D. R. Petit
1986, Journal of Field Ornithology (57) 313-315
The use of natural vs. man-modified wetlands by shorebirds and waterbirds
R. Michael Erwin, Malcolm Coulter, H. Cogswell
1986, Colonial Waterbirds (9) 137-138
The loss of wetlands continues world-wide. The impact especially has been felt in coastal areas, but water management elsewhere has resulted in marked reductions of aquatic bird populations. Concern for wetland management led to the convocation of a symposium on waterbird and shorebird use of natural and man-modified...
Reproductive success and heavy metal contamination in Rhode Island common terns
T. W. Custer, J. C. Franson, John F. Moore, J.E. Myers
1986, Environmental Pollution (Series A) (41) 33-52
Common tern cIutch size, reproductive success and growth of young recorded from an abandoned barge on the Providence River, an area of heavy metal contamination, were equal to, or greater than, .from less contaminated areas. Concentrations of copper and zinc were higher in livers of nestling terns from the Providence...
Constant-parameter capture-recapture models
C. Brownie, J.E. Hines, J.D. Nichols
1986, Biometrics (42) 561-574
Jolly (1982, Biometrics 38, 301-321) presented modifications of the Jolly-Seber model for capture-recapture data, which assume constant survival and/or capture rates. Where appropriate, because of the reduced number of parameters, these models lead to more efficient estimators than the Jolly-Seber model. The tests to compare models given by Jolly do...
Seasonal influence of nutrients on the physiology and behavior of captive canvasbacks (Aythya valisineria)
Matthew C. Perry
1986, Dissertation Abstracts International (46B) 3291 (abs)
Captive canvasbacks (Aythya valisineria) were maintained ad libitum on five diets during the winters of 1978-79 and 1979-80 to evaluate the effects of varying protein and energy levels on feed intake and condition. Diets were formulated to simulate either a natural diet high in invertebrates or one high in vegetation....
Developing a practical model to predict nesting habitat of woodland hawks
J. A. Mosher, K. Titus, M.R. Fuller
Jared Verner, Michael L. Morrison, C. John Ralph, editor(s)
1986, Book chapter, Wildlife 2000: Modeling Habitat Relationships of Terrestrial Vertebrates
Habitat Suitability Index Models: Slider turtle
Stephen J. Morreale, J. Whitfield Gibbons
1986, FWS/OBS 82/10.125
A review and synthesis of existing information were used to develop a Habitat Suitability Index (HSI) model for the slider turtle (Pseudemys scripta). The model consolidates habitat use information into a framework appropriate for field application and is scaled to produce an index between 0.0 (unsuitable habitat) and 1.0 (optimum...
Habitat Suitability Index Models: Wildlife species richness in shelterbelts
Richard L. Schroeder
1986, FWS/OBS 82/10.128
A review and synthesis of existing information were used to develop a Habitat Suitability Index (HSI) model for evaluating potential species richness in shelterbelts. The model consolidates habitat use information into a framework appropriate for field application, and is scaled to produce an index between 0.0 (unsuitable habitat) to 1.0...
