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Front Matter, Vol. 51 No. 4

Great Basin Naturalist

No abstract provided.

Index [And Table Of Contents] To Volume 51

Great Basin Naturalist

No abstract provided.

Impacts Of Black-Tailed Prarie Dog Rodenticides On Nontarget Passerines, Anthony D. Apa, Daniel W. Uresk, Raymond L. Linder

Great Basin Naturalist

In 1983 zinc phosphide, strychnine with prebait, and strychnine without prebait were applied to black-tailed prairie dog (Cynomys ludovicianus) colonies in west central South Dakota. Short-term (four days later) and long-term (one year later) impacts of the rodenticides on Horned Larks (Eremophila alpestris) and other granivorous birds inhabiting prairie dog colonies were evaluated. Hrned Larks and 49 other bird species were observed. Immediate impacts reduced Horned Lark relative densities 66% with strychnine only and 55% with prebaited strychnine. Zinc phosphide caused no measurable reduction. Horned Larks showed no long-term direct impacts. Indirect negative impacts occurred through …

Morphological Variability And Cell Wall Composition Of Phaeodactylum Tricornutum (Bacillariophyceae), Jeffrey R. Johansen

Great Basin Naturalist

Five isolates of Phaeodactylum tricornutum Bohlin were examined in light and transmission electron microscopes. Although isolated from widely separated sites including both coastal marine and inland saline habitats, the morphology of the siliceous frustules of all isolates was very constant. The fusiform and triradiate forms, which have been reported as being non-siliceous in the past, were found to have an amorphous particulate nature in TEM. These forms were examined using EDAX SEM elemental analysis and were found to contain silica in their cell walls.

Vegetation And Soil Zonation Associated With Juniperus Pinchotii Sudw. Trees, Guy R. Mcpherson, G. Allen Rasmussen, David B. Wester, Robert A. Masters

Great Basin Naturalist

Herbaceous vegetation pattern and soil properties around individual Juniperus pinchotii Sudw. trees were studied on a grazed and a relict grassland in western Texas. Herb standing crop and soil samples were obtained under the canopy, at canopy edge, and beyond the canopy edge of three to five trees on each of four dates. Standing crop was lowest midway between the bole and canopy edge. Soil organic matter was highest under juniper canopies on both sites. Soil pH and P were not related to distance from tree bole on either site. Herbaceous pattern from under the canopy to canopy edge apparently …

Two New Species Of Aurealcaulis (Osmundaceae) From Northwestern New Mexico, William D. Tidwell, David A. Medlyn

Great Basin Naturalist

Two new osmundaceous species, Aurealcaulis moorei and A. bransonii, are described from the San Juan Basin of northwestern New Mexico. The area from which they were collected is uncertain, but it is presumed they came from the Lower Eocene San Jose Formation near Angel Peak, southeast of Bloomfield, New Mexico. The species are characterized by having a heterogeneous (A. moorei) to homogeneous (A. bransonii) pith, non- or partial closure of their leaf gaps, exarch protoxylem clusters, formation of their C-shaped leaf traces by fusion of two segments from adjacent xylem strands in their inner cortices, …

Holocene Bison From Arches National Park, Southeastern Utah, Jim I. Mead, Saxon E. Sharpe, Larry D. Agenbroad

Great Basin Naturalist

An artifact constructed from a bison (Bison bison) hornsheath was recovered from the surface of a sandstone shelter also containing skeletal remains of bison and bighorn (Ovis Canadensis). Radiocarbon dating of bison, bighorn, and the artifact indicate that all co-occurred on the central Colorado Plateau, southeastern Utah, either between A. D. 1405 and A. D. 1420, or between A. D. 1535 and A. D. 1605. Skeletal remains of the bison imply that the animal was of the local faunal community during the transition between Protohistoric and Historic time.

Radio Harness System For Bobcat Kittens, Boyde H. Blackwell, Grant T. Frost, Jerran T. Flinders, Harry A. Barber

Great Basin Naturalist

Eight bobcat kittens were fitted with a specially designed harness system supporting a radio transmitter. These kittens were the youngest known to be radio-instrumented. This system was used successfully through two seasons, from June 1989 to January 1991. Litters of kittens were located soon after birth for weighing, marking, and aging (by tooth eruption). During the first year when kittens were at least eight weeks old and six weeks old the second year, attempts were made to radio-instrument kittens in each litter. This harness system allowed litters to be located periodically until their death or dispersal. We were able to …

Alkaloidal Relationships In The Genus Arctomecon (Papaveraceae) And Herbivory In A. Humilis, Douglas A. Raynie, Deanna R. Nelson, Kimball T. Harper

Great Basin Naturalist

The previously reported alkaloids (including protopines, benzophenanthridines, tetrahydrobenzylisoquinolines, and protoberberines) of the genus Arctomecon (Papaveraceae) are discussed in relation to their distribution in the plant kingdom, in the Papaveraceae, and among the three species of Arctomecon. The biological activity of these alkaloids is discussed, and possible implications for herbivore and plant-insect interactions in A. humilis are presented.

Scanning Electron Microscopic Study Of The Male Genitalia Of The North American Alderfly Genus Sialis (Megaloptera: Sialidae), Michael F. Whiting

Great Basin Naturalist

Scanning electron micrographs are presented for 14 species of the North American alderfly Sialis: americana, arvalis, californica, contigua, cornuta, hamata, iola, joppa, mohri, nevadensis, occidens, rotunda, vagans, and velata. Male genitalic characters are described for use in species identification.

Oxytropis Dc.—Names, Basionyms, Types, And Synonyms—Flora North America Project, Stanley L. Welsh

Great Basin Naturalist

All names known to apply to the genus Oxytropis de Candolle in North America are listed with place of publication, type information (where known), type specimen repositories, and notations pertinent to understanding the nomenclatural aspects of the genus. Nomenclatural combinations proposed are: Oxytropis arctica R. Brown var. murrayi (Jurtzev) Welsh and O. campestris (L.) de Candolle var. roaldii (Ostenfeld) Welsh.

Flower Mites Of Trinidad Ii. The Genus Proctolaelaps (Acari: Ascidae), Barry M. Oconnor, Robert K. Colwell, Shahid Naeem

Great Basin Naturalist

Nine species of mites of the genus Proctolaelaps were collected in flowers or phoretic in the nares of hummingbirds in Trinidad. Previously named species P. kirmsei, P. glaucis, and P. belemensis are redescribed, and six new species are described: P. jurgatus, P. mermillion, P. rabulatus, P. contumex, P. certator, and P. contentiosus. Proctolaelaps belemensis cyanocompsae is raised to specific status. Host plants are given for all species except P. mermillion, which was collected only from a hummingbird host. New World flower-inhabiting Proctolaelaps are grouped into two hypothetically monophyletic lineages, the kirmsei …

New Species Of Sialis From Southern California (Megaloptera: Sialidae), Michael F. Whiting

Great Basin Naturalist

Sialis bilobata is described as a new species of the alderfly family Sialidae from Los Angeles County, California. A brief description of the species, illustrations, and diagnosis that compares it with Sialis arvalis Ross are provided.

End Matter, Vol. 51 No. 4

Great Basin Naturalist

No abstract provided.

Unusual Form Of Opuntia Ramosissima Englemann, Allan R. Taylor

Great Basin Naturalist

No abstract provided.

Full Issue, Vol. 51 No. 4

Great Basin Naturalist

No abstract provided.

Front Matter, Pi Sigma Alpha Review

Sigma: Journal of Political and International Studies

No abstract provided.

Unrecorded Volunteer Contributions In Congressional Elections, Kathleen E. Tait

Sigma: Journal of Political and International Studies

No abstract provided.

Political Perestroika And The Rise Of The Rukh: Ukranian Nationalism, 1989-90, Scott Cooper

Sigma: Journal of Political and International Studies

No abstract provided.

Early Childhood Education: A Viable Defense Against Poverty, Kristin Sandberg

Sigma: Journal of Political and International Studies

No abstract provided.

Founding A Republic Of Laws: The Rule Of Law Ideal In Early American Constitutional Theory, Robert Moye

Sigma: Journal of Political and International Studies

No abstract provided.

The Amaerican Medical Association And Congress: Disproportionate Power?, Clifford Roy Strachen

Sigma: Journal of Political and International Studies

No abstract provided.

The Future Of The Spanish State In The Wake Of Regionalistic Nationalism And Separatist Fervor, Deidre Jensen

Sigma: Journal of Political and International Studies

No abstract provided.

Vol. 9, Pi Sigma Alpha Review, Pi Sigma Alpha Review

Sigma: Journal of Political and International Studies

No abstract provided.

The Effect Of A Tilted Magnetic Field On The Equilibrium Of A Pure Electron Plasma, Grant W. Hart

Faculty Publications

If the magnetic field in a pure electron plasma containment device is not aligned with the axis of the conducting walls, the electrons in the device will accumulate at the ends of the plasma where the magnetic field lines come closest to the walls and the electrons bound to the field lines can be closest to their image charges. If the plasma is also offset radially from the center (as with an l=1 diocotron mode), then more density will accumulate at one end than the other. As the plasma revolves around the center, the electrons will slosh from one end …

Front Matter, Vol. 51 No. 3

Great Basin Naturalist

No abstract provided.

End Matter, Vol. 51 No. 3

Great Basin Naturalist

No abstract provided.

Habitat Evaluation Procedure For Rocky Mountain Bighorn Sheep In The Intermountain West, Tom S. Smith, Jerran T. Flinders, David S. Winn

Great Basin Naturalist

Several habitat evaluation procedures have been developed for bighorn sheep. However, none of these procedures specifically addresses the Rocky Mountain subspecies nor analyzes both the quantity and quality of potential bighorn habitat with regard to minimum viable population (MVP) criteria. This bighorn habitat evaluation procedure combines (1) a quantitative assessment of bighorn range to determine if there are adequate quantities of resources to support an MVP of bighorn sheep, and (2) a qualitative assessment of a range to predict the probable density of bighorns the range can support. Extensive literature review, intensive bighorn research, and a modeling tool, pattern recognition …

Observations On The Developmental Biology Of Cicindela Arenicola Rumpp (Coleoptera: Cicindelidae), Karen Lyn Bauer

Great Basin Naturalist

Cicindela arenicola Rumpp is being considered for threatened and endangered status by the U.S. Fish and Wildlife Service. Little is known about the developmental biology of this species.

Adults of C. arenicola were active from April through late June and late August through early November, but generally they were not on the surface when temperatures were below 19 C or above 45 C, or when conditions were windy, cloudy, or rainy. Mating and egg-laying occurred only during the spring.

Five size classes (1-, 2-, 3-, 4-, and 5-mm diameters) of larval burrow openings were observed. Burrows of 5 mm had …

Tree Size And Understory Phytomass Production In A Western Juniper Woodland, Milda R. Vaitkus, Lee E. Eddleman

Great Basin Naturalist

Understory phytomass production in a western juniper (Juniperus occidentalis) woodland was examined relative to tree size in central Oregon in 1983 and 1984. Vegetation was sampled in two zones, the canopy zone (beneath the canopy) and the intercanopy zone (the space between canopies), on two adjacent sites—a lower slope site with shallow soil and an upper slope site with deeper soil. Sampling was stratified into three tree size classes. Individual species production was significantly affected by tree size and location relative to tree canopy. Production of bottlebrush squirreltail, bluebunch wheatgrass, cheatgrass, miscellaneous annual grasses, perennial forbs, and annual …