Digital Commons Network^™

Kanab Ambersnail And Other Terrestrial Snails In South Central Utah, Vicky J. Meretsky, Eric G. North, Lawrence E. Stevens

Western North American Naturalist

Surveys for succineid snails were conducted to improve genetic and geographical information for the endangered Kanab ambersnail (Oxyloma haydeni kanabensis Pilsbry) and related taxa within the Succineidae. Surveys were carried out in the Bureau of Land Management Kanab District, at the Grand Staircase Escalante National Monument, on 3 private holdings, and along Highways 89, 12, and 14, all in south central Utah. A population of Kanab ambersnails was known to exist in the region; other populations of Oxyloma were discovered in primarily seep-fed wetlands in Kanab Creek and in tributaries of and wetlands along the Virgin, Sevier, and Escalante …

Diet And Food-Niche Breadth Of Burrowing Owls (Athene Cunicularia) In The Imperial Valley, California, Melissa M. York, Daniel K. Rosenberg, Ken K. Sturm

Western North American Naturalist

Burrowing Owls (Athene cunicularia) occupy intensively managed agricultural areas within the Imperial Valley of California, where they occur at high densities relative to other areas in the state, and yet reproductive rates are often low. Understanding diet and food-niche breadth may lead to insights into factors contributing to their poor reproductive performance. We tested the relative contribution of sex, year, and season on diet composition and food-niche breadth from analyses of stomach contents of adult Burrowing Owls (n = 53). Orthoptera dominated the diet; it accounted for 58.9% of the total number of prey items in all …

Autumnal Migration Of Eared Grebes (Podiceps Nigricollis) Through Southwestern Wyoming: A Key To Assessing The Size Of The North American Population, Joseph R. Jehl Jr., Carl Johansson

Western North American Naturalist

In autumn the vast majority of the North American population of Eared Grebes (Podiceps nigricollis) congregates for several months at Great Salt Lake, Utah, and Mono Lake, California. Because the lakes are so large, it has not been possible to monitor grebe migration with sufficient accuracy to determine when peak numbers are reached. To clarify migration phenology, we analyzed data from 2 isolated wetland areas in southwestern Wyoming where grebes land en route between breeding areas in the interior and Great Salt Lake. Occasional birds, probably nonbreeders or failed breeders, begin moving southward as early as mid-June. Migration …

Orientation And Vertical Distribution Of Red-Naped Sapsucker (Sphyrapicus Nuchalis) Nest Cavities, Laurence R. Butcher, Scott A. Fleury, J. Michael Reed

Western North American Naturalist

It has been hypothesized (1) that the compass direction in which woodpeckers excavate breeding cavities depends on nest thermoregulatory needs, and (2) that when multiple cavities are placed in the same tree across years, each new cavity is placed above previous cavities. We tested these hypotheses for Red-naped Sapsuckers (Sphyrapicus nuchalis) in central Nevada and found some evidence that cavities are oriented for thermoregulatory advantage, but we rejected the hypothesis that active cavities are always the highest.

A New State Record For Cicindela Nigrocoerulea Leconte (Coleoptera: Cicindelidae) In Nevada, Michael G. Kippenhan

Western North American Naturalist

No abstract provided.

Arbuscular Mycorrhizae Of Mojave Desert Plants, Jonathan H. Titus, Priscilla J. Titus, Robert S. Nowak, Stanley D. Smith

Western North American Naturalist

Roots of 15 Mojave Desert plant species were assessed for arbuscular mycorrhizal (AM) colonization in spring and autumn 1999. Another 19 species were assessed in autumn only. Perennial species were AM colonized, whereas annual species contained very low levels of AM hyphae or were nonmycorrhizal. The nonnative tree Tamarix ramosissima was also nonmycorrhizal. Levels of hyphae changed over the season in 2 species, arbuscle levels increased in 1 species, and vesicles decreased in 7 species. Mycorrhizal inoculum potential (MIP) was assessed in the soils associated with spring-collected plants. All soils were found to contain MIP. MIP values were not correlated …

Sampling Effort And Vegetative Cover Estimates In Sagebrush Steppe, Richard S. Inouye

Western North American Naturalist

The goal of this study was to identify relationships between sampling effort, using a point frame, and the precision of estimates of vegetative cover in sagebrush steppe. Data for 208 point-frame samples were randomly drawn and 95% confidence intervals were identified for varying sample sizes of individual species and species groups. Confidence interval widths decreased rapidly as sample sizes increased from 1 to 50, and more slowly as sample sizes were increased further. For the more abundant species, sample sizes of fewer than 50 frames were sufficient to reduce the 95% confidence interval to less than one-half of average cover. …

Bird Populations In Riparian Areas Of Southeastern Arizona In 1985–86 And 1994–95, Linnea S. Hall, Michael L. Morrison, Laurel L. Christoferson, John Martin, Carl E. Bock, Thomas R. Strong

Western North American Naturalist

No abstract provided.

The Effect Of Roads And Trails On Movement Of The Ogden Rocky Mountain Snail (Oreohelix Peripherica Wasatchnesis), Dwayne W. Meadows

Western North American Naturalist

No abstract provided.

The Geology Of The Parks, Monuments, And Wildlands Of Southern Utah By Robert Fillmore, C. Riley Nelson

Western North American Naturalist

No abstract provided.

Abundance And Condition Indices Of Coyotes On Hart Mountain National Antelope Refuge, Oregon, Mike R. Dunbar, Mark R. Giordano

Western North American Naturalist

U.S. Fish and Wildlife Service staff at Hart Mountain National Antelope Refuge (HMNAR), southeastern Oregon, documented high pronghorn (Antilocapra americana) fawn mortality, subsequent low fawn recruitment, and declining pronghorn numbers from 1996 to 1999. Coyote (Canis latrans) predation was the primary cause, accounting for 60–85% of fawn mortalities each year, and fawns were not physiologically predisposed to predation. Therefore, we investigated certain coyote population parameters (age structure, survival, density, physiology) to evaluate how or if these factors influence coyote predation rates on pronghorn fawns. We captured 11 coyotes (5 male and 6 female) in December 1998. …

Full Issue, Vol. 62 No. 3

Western North American Naturalist

No abstract provided.

Genetic Differentiation Of Rare And Common Varieties Of Eriogonum Shockleyi (Polygonaceae) In Idaho Using Issr Variability, James F. Smith, Terry A. Bateman

Western North American Naturalist

Idaho populations of Eriogonum shockleyi are divided taxonomically into 2 varieties: E. shockleyi var. packardae, which is endemic to Idaho, and the typical variety, which is widespread in the western United States. Recent morphological investigations of E. shockleyi in Idaho have identified potentially reliable morphological characters for field identification of the subspecific taxa. This paper investigates the genetic basis for the separation of the 2 varieties of E. shockleyi using inter simple-sequence repeats (ISSR) markers. Although we found some morphological differences between the populations that correlated with the 2 varieties, we identified no molecular markers in this study to …

Some Thoughts On Human Nature: A Discussion Of Human Strenghts And Weaknesses, Jens G. Pohl

Collaborative Agent Design (CAD) Research Center

This paper attempts to explore the behavioral characteristics of human beings from a point of view that is not based on inter-human comparisons, but on an examination of the intrinsic physical, biological, intellectual, emotional, and social characteristics of this species. It is argued that the experience-based nature of the human cognitive system greatly reduces our ability to adapt to changes in our environment, exploit opportunities, and create new knowledge. A fundamental biological survival instinct drives the human being to seek a level of certainty and security that is irreconcilable with a continuously changing and largely unpredictable environment. The symptoms of …

July 29, 2002 Reporter, University Of Alabama At Birmingham

eReporter (campus newsletter)

No abstract provided.

44th Rocky Mountain Conference On Analytical Chemistry

Rocky Mountain Conference on Magnetic Resonance

Final program, abstracts, and information about the 44th annual meeting of the Rocky Mountain Conference on Analytical Chemistry, co-endorsed by the Colorado Section of the American Chemical Society and the Society for Applied Spectroscopy. Held in Denver, Colorado, July 28 - August 1, 2002.

Survey Of Hydrogen Sulfide Concentrations In Vicinity Of Beef Cattle Feedlots, Richard K. Koelsch, Bryan L. Woodbury, David E. Stenberg, Daniel N. Miller, Dennis D. Schulte

Department of Agricultural and Biological Systems Engineering: Presentations and White Papers

A field survey of Total Reduced Sulfur (TRS) concentrations in the vicinity of beef cattle feedlots was conducted to compare field observations against current regulatory thresholds. In addition, environmental factors that may contribute to increased TRS emissions were evaluated. It was observed that TRS levels in the vicinity of beef cattle feedlots are not likely to exceed current regulatory thresholds used by mid-western states. It was further noted that concentration of TRS varies with air temperature and time of day. However, wet feedlot surface conditions and wind speed had almost no impact upon observed concentrations.

2002 Summer Commencement, Harding University

Commencement Programs

Program for the Commencement on July 27.

Commencement Speaker: Chuck Monan

Volume 39, Number 42: July 26, 2002, University Of North Dakota

University Letter Archive

No abstract provided.

Cropwatch No. 2002-18, July 26, 2002, Lisa Brown Jasa

Crop Watch (1994–2005)

Inside

Management tips……….164

Field updates……….……….164

Soybean aphid research……….……….165

Yellow soybeans……….……….167

Clearfield wheat system……….……….168

Volunteer wheat……….……….168

SCREC field day……….……….169

2^nd ECB flight……….……….170

Management worksheet……….……….170

Greenbugs in sorghum……….……….171

Forage from soybeans……….……….172

Drought Web page……….……….172

Illinois State University Board Of Trustees Meeting Materials, July 26, 2002, Board Of Trustees

Illinois State University Board of Trustees (1995-2013)

Minutes, reports, and action items relating to the July 26, 2002 meeting of the Illinois State University Board of Trustees.

The Perpetual Student: An Educator's Joumey, Allison B. Burnes

Digitized Theses and Dissertations (prior to 2008)

This is to certify that the Master of Education Portfolio of Allison B. Burnes has been approved by the Supervising Committee for the portfolio requirement for the Master of Education in Special Education in the Department of Special Education

July 26, 2002, The Daily Mississippian

Daily Mississippian (all digitized issues)

No abstract provided.

Dengue Epidemic Spreads, Ladb Staff

NotiCen

No abstract provided.

Unh Center Helping New Hampshire Meet Needs In Management Of Technology, Mary Peterson

Media Relations

No abstract provided.

The Murray Ledger And Times, July 25, 2002, The Murray Ledger And Times

The Murray Ledger & Times

No abstract provided.

Simple, Compact Source For Low-Temperature Air Plasmas, D. P. Sheehan, J. Lawson, M. Sosa, Richard A. Long

Faculty Publications

A simple, compact source of low-temperature, spatially and temporally uniform air plasma using a Telsa induction coil driver is described. The low-power ionization discharge plasma is localized (2 cm X 0.5 cm X 0.1 cm) and essentially free of arc channels. A Teflon coated rolling cylindrical electrode and dielectric coated ground plate are essential to the source’s operation and allow flat test samples to be readily exposed to the plasma. The plasma is a copious source of ozone and nitrogen oxides. Its effects on various microbes are discussed.

Summer Mustang, July 25, 2002

Cal Poly Student Newspaper

Student newspaper of California Polytechnic State University, San Luis Obispo, CA.

Eicosanoids Mediate Manduca Sexta Cellular Response To The Fungal Pathogen Beauveria Bassiana: A Role For The Lipoxygenase Pathway, Jeffrey C. Lord, Sheri Anderson, David W. Stanley

Department of Entomology: Faculty Publications

Many studies have documented the involvement of eicosanoids in insect cellular immune responses to bacteria. The use of the fungal pathogen Beauveria bassiana as a nodulation elicitor, with inhibition of phospholipase A2 by dexamethasone, extends the principle to fungi. This study also provides the first evidence of involvement of the lipoxygenase (LOX) pathway rather than the cyclooxygenase (COX) pathway in synthesis of the nodulation mediating eicosanoid(s). The LOX product, 5(S)- hydroperoxyeicosa-6E,8Z,11Z,14Z-tetraenoic acid (5-HPETE), substantially reversed nodulation inhibition caused by dexamethasone and the LOX inhibitors, caffeic acid and esculetin. The COX product, prostaglandin H₂ (PGH₂), did not reverse …

July 25, 2002, The Daily Mississippian

Daily Mississippian (all digitized issues)

No abstract provided.