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Age And Growth Of June Sucker (Chasmistes Liorus) From Otoliths, Mark C. Belk

Great Basin Naturalist

No abstract provided.

End Matter, Vol. 58 No. 4

Great Basin Naturalist

No abstract provided.

Comparative Demography Of The High-Altitude Lizard, Sceloporus Grammicus (Phrynosomatidae), On The Iztaccihuatl Volcano, Puebla, México, Julio A. Lemos-Espinal, Royce E. Ballinger, Geoffrey R. Smith

Great Basin Naturalist

Population density, reproduction, and survivorship were compared between 2 populations of Sceloporus grammicus occurring at different altitudes (3700 m and 4400 m) on the eastern slopes of Iztaccihuatl Volcano, Puebla, México. Lizards in both populations matured at the same age (14–15 mon) and size (39–42 mm SLV). Population density was slightly greater at high altitude (131–163 per ha) than at low altitude (52–83 per ha). Survivorship and R_o were higher at the low-altitude area, but in general there were no significant demographic variations between altitudes that have been reported in lizard population at higher latitudes. Studies of lower-elevation populations …

Bird Use Of Riparian Vegetation Along The Truckee River, Califonia And Nevada, Suellen Lynn, Michael L. Morrison, Amy J. Kuenzi, Jennifer C. C. Neale, Benjamin N. Sacks, Robin Hamlin, Linnea S. Hall

Great Basin Naturalist

The Truckee River in California and Nevada is subject to diverse water regimes and a corresponding variety of flow rates. Original riparian vegetation has been altered by these variable flow rates and by a variety of human uses resulting in loss of native riparian vegetation from its historic extent. We conducted bird surveys along the Truckee River during spring 1993 to (1) determine relationships between birds and the present vegetation; (2) determine the importance of different vegetation types to sensitive bird species that have declined recently in the western United States due to competition from exotic plant species, cowbird ( …

Ravens, Cowbirds, And Starlings At Springs And Stock Tanks, Mojave National Preserve, California, Richard L. Knight, Richard J. Camp, Heather A. L. Knight

Great Basin Naturalist

No abstract provided.

Full Issue, Vol. 58 No. 4

Great Basin Naturalist

No abstract provided.

Soil-Vegetation Relations Of Recovering Subalpine Range Of The Wasatch Plateau, James O. Klemmedson, Arthur R. Tiedemann

Great Basin Naturalist

On degraded subalpine range of the Wasatch Plateau, we examined the hypothesis that recovery of vegetation, as manifested by its composition and biomass yield, was related to soil phosphorus (P) and sulfur (S) status. We sampled 6 topographic locations to determine the relationship among composition and yield of grasses and forbs, litter cover, and soil characteristics including rock cover, organic carbon (C_o), total N (N_t), available nitrogen (N_av), total phosphorus (P_t), organic P (P_o), inorganic P (P_i), total potassium (K), total S (S_t), and element ratios. …

Response Of Understory Species To Changes In Ponderosa Pine Stocking Levels In The Black Hills, Daniel W. Uresk, Kieth E. Severson

Great Basin Naturalist

The objective of this study was to test the hypothesis that there are no differences in understory production, by species, due to stocking levels of Pinus ponderosa (ponderosa pine). Understory production was estimated, by species, on 3 replicates each of 8 growing stock levels, ranging from clearcuts to unthinned stands, in both sapling- and pole-sized pine stands (48 plots) over 3 nonconsecutive years. All stands were approximately 70 yr old when thinning treatments were applied. Production of many herbaceous species, especially Agropyron spp. (wheatgrasses) and Carex spp. (sedges), declined as growing stock levels (measured in terms of basal area) of …

Algal Composition Of Microbiotic Crusts From The Central Desert Of Baja California, Mexico, Valerie R. Flechtner, Jeffrey R. Johansen, William H. Clark

Great Basin Naturalist

A total of 66 algal species representing 32 genera were recovered from soils of 10 sites in the Cataviña region of the Central Desert of Baja California, Mexico. The most common species encountered were the cyanophytes Nostoc commune and Schizothrix calcicola, the chlorophyte Myrmecia astigmatica, and the diatoms Hantzschia amphioxys, Hantzschia amphyoxys f. capitata, Luticola cohnii, Luticola mutica, and Pinnularia borealis var. scalaris. Nine species not found in any previous studies of North American desert soils were present in our study sites, including 3 taxa new to science: Cylindrocystis brebissonii var. deserti, var. nov.; Elakatothrix …

Use And Selection Of Brood-Rearing Habitat By Sage Grouse In South Central Washington, Colin M. Sveum, John A. Crawford, W. Daniel Edge

Great Basin Naturalist

Sage Grouse (Centrocercus urophasianus) brood-habitat use was examined during 1992 and 1993 at the Yakima Training Center in Yakima and Kittitas counties, Washington. During the 2 yr we followed 38 broods, of which 12 persisted to 1 August (x̄ = approximately 1.5 chicks/brood). Food forb cover was greater at all brood locations than at random locations. Hens with broods in big sagebrush/bunchgrass habitat (Artemisia tridentata/Agropyron spicatum) selected for greater food forb cover, total forb cover, and lower shrub heights; broods in altered big sagebrush/bunchgrass habitats selected greater tall grass cover and vertical cover height; broods …

Front Matter, Vol. 58 No. 4

Great Basin Naturalist

No abstract provided.

Carroll Quigley On The Matrix Of Civilizations: A Dialectic, Arthur S. Iberall

Comparative Civilizations Review

No abstract provided.

Civilizations Galore, Roger Williams Wescott

Comparative Civilizations Review

No abstract provided.

Gender Discrimination In The Employment Of Female Attorneys, Sonia Jimenez

Brigham Young University Prelaw Review

No abstract provided.

Academic Comparison Of Athletes And Non-Athletes In A Rural High School, Holt E Zaugg

Faculty Publications

This study compares academic performance, behavior, and commitment of basketball and volleyball athletes and non-athletes in a rural Canadian high school. It compares mid-term and final grades in each school discipline; visits to an administrator for disciplinary visits; and demerit points for improper behavior; and estimates the mean weekly time commitment for athletes in each sport.

Meaning In Family Mealtime, Ardyth Gunnell Cannon

Theses and Dissertations

This project asks families what mealtime together means to them. The topic of family mealtime appears comparatively infrequently in academic literature, and any meaning that families associate with mealtime has seldom been studied directly. This particular research investigates meanings of the understudied mealtime event by interviewing three or four generations of family members from five different families. Attention is paid to emerging standards of rigor for qualitative research, namely applicability through the selection of families who have a history of practicing a family mealtime tradition, truth value in faithfully representing the interviewees perceptions, and auditability by including detail of the …

Range Of The Brown-Headed Cowbird In Colorado: Past And Present, Jameson F. Chace, Alexander Cruz

Great Basin Naturalist

The historic range of the bison (Bison bison) on the Great Plains has been well documented. In Colorado the range of bison included both the eastern grasslands and higher-elevation ridges and mountain parks, up to an elevation of 3900 m. Based on the commensal relationship of the brood-parasitic Brown-headed Cowbird (Molothrus ater) with the bison, we suggest that the cowbird had a larger historical elevational range in Colorado than previously known and consequently has had a long-term host-parasite relationship with high-elevation breeding songbirds.

Comparison Of The Epiproct Structure Of Two Closely Related Species, Sweltsa Fidelis (Banks) And S. Revelstoka (Jewett) (Plecoptera: Chloroperlidae), Jennifer K. Delk, Mary Jane Kilgore, Bill P. Stark

Great Basin Naturalist

The male epiprocts of 2 closely related western Nearctic species, Sweltsa fidelis (Banks) and S. revelstoka (Jewett), were examined using SEM. The males of these 2 species have been historically distinguished by epiproct measurements. The ratio of the length from the base to greatest width versus total epiproct length ranges from 0.49 µm to 0.67 µm (x̄ = 0.56) in S. fidelis and 0.55 µm to 0.69 µm (x̄ = 0.60) in S. revelstoka. Similarities in measurement suggest that the location of the greatest epiproct width is not a reliable and consistent character for distinguishing males of …

Fish Predation On Giant Water Bug (Heteroptera: Belostomatidae) Eggs In An Arizona Stream, Robert L. Smith, Chris Horton

Great Basin Naturalist

No abstract provided.

Survivorship And Cause-Specific Mortality In Five Populations Of Mule Deer, Vernon C. Bleich, Timothy J. Taylor

Great Basin Naturalist

We used retrospective analyses to investigate cause-specific mortality and survivorship among 5 populations of mule deer (N = 168 telemetered animals) wintering in the western Great Basin during 1986–1994. These populations existed under similar environmental conditions, but survivorship functions differed among them. Monthly survival ranged from 0.964 to 0.990, and annual survival ranged from 0.643 to 0.884. The proportion of deaths attributed to predation and malnutrition or anthropogenic causes did not differ among the 5 populations. Predation was the leading cause of mortality; mountain lions were responsible for approximately 90% of the deer killed by predators. No difference existed …

Starvation And Nestling Ejection As Sources Of Mortality In Parasitized Lazuli Bunting Nests, William B. Davison

Great Basin Naturalist

No abstract provided.

Front Matter, Vol. 58 No. 3

Great Basin Naturalist

No abstract provided.

End Matter, Vol. 58 No. 3

Great Basin Naturalist

No abstract provided.

Gap Analysis Of The Vegetation Of The Intermountain Semi-Desert Ecoregion, David M. Stoms, Frank W. Davis, Kenneth L. Driese, Kelly M. Cassidy, Michael P. Murray

Great Basin Naturalist

A conservation gap analysis was conducted for the Intermountain Semi-Desert ecoregion to assess the representation of land-cover types within areas managed primarily for biodiversity objectives. Mapped distributions of plant communities were summarized by land-management status categories. The total amount of land permanently protected in the ecoregion is

Winter Macroinvertebrate Communities In Two Montane Wyoming Streams, Christopher M. Pennuto, Frank Denoyelles Jr., Mark A. Conrad, Frank A. Vertucci, Sharon L. Dewey

Great Basin Naturalist

Macroinvertebrate communities were examined on 4 winter dates over a 4-yr period in 2 high-altitude Rocky Mountain streams to document overwintering assemblages potentially experiencing spring acid pulses. Taxa richness values were comparable to other published lists for alpine and montane stream systems despite the fact that most literature reflected summer collections. Mean benthic density ranged from 1406 to 19,734 organisms/m², and drift rates ranged from 0 to 1740 organisms/100 m³. Benthic collections showed higher taxa richness than drift collections while the Ephemeroptera and Plecoptera occurred in greater proportions in drift than in benthos. The Nemouridae (Plecoptera), …

Persistence Of Subalpine Forest–Meadow Ecotones In The Gunnison Basin, Colorado, Andrew J. Schauer, Brian K. Wade, John B. Sowell

Great Basin Naturalist

Forests of the southern Rocky Mountains are punctuated by persistent meadows called parks that are dominated by grasses and forbs. In an attempt to elucidate the maintenance of subalpine parks in the Gunnison Basin, Colorado, soil texture and tree morphology differences along 60-m transects spanning the forest-park ecotone were studied in 6 representative parks. Seedling survivorship, percent seed germination, and soil moisture available to plants were also studied along one of the transects in Willow Park. Soil analyses revealed 40% more silt and significantly less sand and clay in all 6 parks (P < 0.001), which supports the traditional hypothesis that edaphic factors are involved in restricting establishment of trees in parks. In Willow Park moisture available to plants in soils at field capacity varied significantly across the ecotone (P = 0.011), with 54% more …

Chemical And Biological Characteristics Of Desert Rock Pools In Intermittent Streams Of Capitol Reef National Park, Utah, Jill S. Baron, Toben Lafrancois, Boris C. Kondratieff

Great Basin Naturalist

Chemical variability and biological communities of rock pools found in small desert drainage basins of Capitol Reef National Park were characterized over 8 mon in 1994. Neither flooding, drying, nor the presence or absence of surrounding vegetated wetlands had a great effect on chemical composition, which was very dilute and fluctuated somewhat in response to rain events. Neither flooding nor drying affected the composition of biological communities in the pools. Summer storms affected only a few drainages at a time, and only a few study pools of significant volume dried completely during the hot, dry summer. This suggests that only …

Full Issue, Vol. 58 No. 3

Great Basin Naturalist

No abstract provided.

Solute-Solvent Pair Distribution Functions In Highly Asymmetric Additive Hard Sphere Mixtures, Douglas Henderson, Kwong-Yu Chan

Faculty Publications

Contact values for the solute-solvent pair distribution function in an additive hard sphere mixture, as computed from the Henderson-Chan (HC) formulas, are compared with the recent Monte Carlo (MC) data and formula of Matyushov and Ladanyi (ML) [J. Chem. Phys. 107, 5815 (1997)]. The agreement is found to be excellent. The negative finding of ML is due to a misprint in one of the HC publications. We find the HC formula to be superior to the ML formula when compared to our MC data [Mol. Phys. 91, 1137 (1997)] for the case where the ratio of diameters is large and …

Chironomidae (Diptera) Of The Colorado River, Grand Canyon, Arizona, Usa, I: Systematics And Ecology, James E. Sublette, Lawrence E. Stevens, Joseph P. Shannon

Great Basin Naturalist

We describe the chironomid midge fauna of the Colorado River between Glen Canyon Dam and Lake Mead, Arizona. This depauperate fauna, consisting of 38 species, is dominated by euryecious Nearctic or Holarctic orthocladine taxa. In addition, a small Neotropical faunal component is represented by Polypedilum obelos Sublette & Sasa and Rheotanytarsus hamatus Sublette & Sasa.

The following new synonyms are given: Protenthes riparius Malloch 1915 with Tanypus bellus Loew 1866 [= Procladius (Psilotanypus) bellus (Loew)]; Cricotopus olivetus Boesel 1983 with Cricotopus (Circotopus) annulator (Goetghebuer) 1927; Cricotopus edurus Sublette & Sublette 1971 with Orthocladius infuscatus Malloch 1915 [= Cricotopus (Cricotopus) infuscatus …