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Distributional Studies Of Parasitic Arthropods In Utah Determined As Actual And Potential Vectors Of Rocky Mountain Spotted Fever And Plague: With Notes On Vector-Host Relationships, D Elden Beck

Brigham Young University Science Bulletin, Biological Series

Through the courtesy of the National Institutes of Health, Grants and Fellowships Division, a project was established at Brigham Young University to study the distribution and host relationships of vectors for Rocky Mountain spotted fever and plague in the state of Utah.

Rocky Mountain Spotted Fever
Of the four capable vectors listed as present in the United States, Dermacentor andersoni and Haemaphysalis leporis palustris are found in Utah. Listed for Utah as potential (experimental) vectors are Dermacentor parumapertus, Dermacentor albipictus, Rhipicephalis sanguineus and Ornithodoros parkeri. Of the potential vectors D. parumapertus is the only species having extensive distribution in Utah. …

Front Matter, Vol. 1 No. 1

Brigham Young University Science Bulletin, Biological Series

No abstract provided.

End Matter, Vol. 1 No. 1

Brigham Young University Science Bulletin, Biological Series

No abstract provided.

Distinguishing Characteristics Of The Seeds Of Garden Flowers Of Utah And A Key For Their Identification, Naia H. Burkey

Theses and Dissertations

The purpose of this thesis has been to make a collection of the seeds of herbaceous dicotyledonous garden flowers of Utah, to examine their external structural characteristics and to prepare keys for their classification. A collection of the seeds of 146 species of garden flowers has been made, and includes species of 41 families. The seeds have been cleaned and dried and a collection stored in labelled vials and left in the Botany Department of the Brigham Young University. Keys have been prepared for the identification of the families, genera, and species. As far as possible external characteristics--such as color, …

The Succession Of Vegetation On A Southern Utah Sand Dune, Elias S. Castle

Theses and Dissertations

The sand dunes lying ten miles northwest of Kanab in Kane County, Utah, support a sparse plant cover with four species dominating the vegetation: Psoralea stenostachys, Sophora stenophylla, Oryzopsis hymenoides, and Wyethia scabra var. attenuata. Of these Psoralea and Wyethia are endemic to the dunes or to a limited area which includes the dunes. The pineer species gain a start in the valleys between dunes and occupy the area only until sand covers them or until sand is blown away from their roots. Stabilization of the soils is not permanently in the interdune valleys and the dunes continue to wander. …

A Preliminary Study Of The Genus Carex In Utah County, Utah, William R. Liechty

Theses and Dissertations

It has been the purpose of the author in this study to determine, as far as possible in the available tim.e, the number and kinds of Carex which occur in Utah County; their distribution in relation to region, soil, moisture and other factors, and to provide keys to the species and a description of each one that occurs in this natural area.

A Preliminary Study Of The Vegetation In An Exclosure In The Chaparral Of The Wasatch Mountains, Utah, Verl Phillips Allman

Theses and Dissertations

The purpose of this study was to determine the ecological factors existing within the chaparral community. The present status of the vegetation in a one-acre exclosure was analyzed and recorded so that subsequent improvement or eterioration might be noted. A brief history of the area, the weather, and the geology are presented. Many other aspects of the problems enumerated in the introduction need to be studied. This study provides a foundation for a more detailed study of the vegetation which may be undertaken at a future date.

An Ecological Study Of A Sphagnum Lake In The Subalpine Forest Of The Uinta Mountains Of Utah, Howard C. Stutz

Theses and Dissertations

A study was made of the ecology and floristics of a small bog lake referred to as Moss Lake, in the Grandaddy lakes region of the Uinta Mountains , Utah . Three consecutive summers, 1948, 1949, and 1950, were spent in collecting the data presented in this study. Throughout the study the following ecological measurements were made: 1. Water 2. Soil 3. Macroscopic vegetation 4. Plankton 5. Macroscopic animal forms.

Alpine Plant Succession Near Mount Emmons, Uinta Mountains, Utah, Joseph R. Murdock

Theses and Dissertations

It was to provide some detailed information about the alpine flora , particularly as it relates to successional aspects , that the present study was undertaken . The environmental conditions of weather and soil , as they effect floral composition , are important factors in the plant succession or alpine communities . The investigation was designed to uncover such information about the alpine flora and environment necessary to establish the pattern of succession .

The Female Genitalia And Spermathecae Of Some Of The Rhynchophora, Herman O. Sanders

Theses and Dissertations

In this study of the genitalia and spermathecae of the Rhynohophora, eighty-two species, representing sixty genera, were examined as listed in Leng's Catalogue of Coleoptera of North America North of Mexico, together with seven species from the Phillippine Islands and one from China. By using the external female genitalia and spermathecae the Rhynochophora studied may be divided into eight and possibly nine well-defined groups. They are separated into these groups on the basis of the development of the nodulus and ramus and upon the degree of crenulation that occurs in the spermatheca. The spermatheca of all species studied has been …

The Staphylinoid And Dascilloid Aquatic Coleoptera Of The Nevada Area, Ira La Rivers

Great Basin Naturalist

No abstract provided.

The North American Species Of Smilacina, Desma H. Galway

Theses and Dissertations

This paper is the result of a taxonomic study of the species of the genus Smilacina occurring naturally in North America north of Mexico. In the past it has been difficult to make satisfactory determinations of members of this genus from existing manuals, especially among western forms. West of the great plains the great diversity in environmental conditions has given rise to a diversity in form of the species that are widely distributed. Many of these forms have been given specific or varietal names recently, and as no comprehensive work on the genus has been done since most of these …

The Influence Of Some Alkali Salts In The Presence Of Various Concentrations Of Calcium On The Growth Of Sporobolus Cryptandrus, Vaughn A. Clayton

Theses and Dissertations

This study deals with the reactions of Sporobolus cryptandrus to various concentrations of Utah's most common alkali salts. Its purpose is to determine the effects of various concentrations of sodium chloride, sodium carbonate, and sodium sulphate on the growth and fruiting of Sporobolus cryptandrus, and to determine to what extent, if any, various levels of calcium exert a protective influence against the toxicity of these three salts. In addition to the experimental work a field of study was conducted for the purpose of determining the concentrations of total salts found in soils supporting a good growth of Sporobolus cryptandrus.

The Distribution Of Plant Types In The Escalante Desert Of Utah With Relation To Soil Conditions, Carlyle B. Lambert

Theses and Dissertations

This problem was a study of plant species in the Escalante Desert, Utah, in relation to soil conditions. The plants were surveyed by the transect-plot method. The plants and soils were analyzed by percentage-frequency techniques. There is no measurable correlation between soil series and the dominant plants which occur on the soils. There is no correlation between soil types and the plants that are dominant on the soil types. There is a definite correlation between textural classes of the soil and the plants that are dominant on these classes.

The Rise And Development Of The Megagametophyte In Yucca Angustissima Engelmann, Antone W. Nisson

Theses and Dissertations

The studies involved in this investigation are based upon data and materials secured in the sandy areas of Washington and Iron Counties in southern Utah. The regions in which Yucca angustissima is found have a scant vegetation, are dry, sandy to sandy loam, well-drained, and with an elevation of from 2500 to 5000 feet. Watkins (1937) worked out a very extensive report of the megagametophyte development of Yucca rupicola. He begins with the four megaspore stage, and shows next the disintegration of the three micropylar megaspores. He reported that the chalazal megaspore forms eight free nuclei, by three successive divisions, …

A Preliminary Study Of The Vegetative Cover In Spanish Fork Canyon, Utah, Ben S. Markham

Theses and Dissertations

Spanish Fork Canyon is located in central Utah and is part of the Wasatch Mountain range. Since the coming of the white man to this section of country it has been used as a trail. The canyon provides summer range for stock as well as a watershed. Plant densities were determined by the point observation method using series of one-hundred square foot plots. Three areas which have been subject to different grazing uses were studied. The association changes in the canyon are the replacement of sage by slender wheatgrass on the shallow soils and the disclimax condition resulting from over-grazing …

The Influence Of Overgrazing On The Density And Number Of Palatable And Unpalatable Desert Forage Plants, John H. Mcguire

Theses and Dissertations

The data for this problem were collected at the Desert Range Experiment Station and on adjoining public domain lands during the summer of 1934, for the purpose of studying the influence of overgrazing on the increase of palatable and unpalatable desert forage plants. A vegetative description of the two areas studied has been prepared and presented.

The Development Of The Embryo Of Iris Missouriensis Nutt, C. Eugene Larsen

Theses and Dissertations

There is but a single species of Iris native to Utah. This is Iris missouriensis Nutt. This plant was chosen for investigation because of its possible significance and because material of this species was readily available. The embryo of Iris missouriensis Nutt. shows some resemblance to the Lily type in its development of an irregular dividing suspensor. It also resembles the Orchid type in the usual development of sixteen cells before the dermatogen is cut off. In general development, however, the writer believes it to have an embryo sequence more similar to the Alisma type than to the dexcriptions given …

Effects Of Overgrazing On The Mortality Of Desert Browse Of The Utah West Desert, Charles W. Menzies

Theses and Dissertations

During the summer of 1934 this investigation was conducted to determine the effect of overgrazing on the mortality of desert browse in the vicinity of the Desert Range Branch experiment station. Range lands of western United States have, as a whole been subjected to overgrazing. Utah has about 24 million acres of public acres of public domain that can only be utilized from grazing. An effort has been made to put this area under control. The "Taylor Grazing Act" passed by Congress June 28, 1934 is a big step in the direction of the control of this vast area of …

A Study Of The Plant Ecology Of Salt Lake And Utah Valleys Before The Mormon Immigration, John Homer Wakefield

Theses and Dissertations

This study is an attempt to bring together such available material , heretofore not collected, into a single compilation pertaining to the plant associations of Utah and Salt Lake Valleys. An endeavor is made to build a picture of the vegetation as it was before the pioneers entered these valleys as compared with what it is today. The material compiled here is the result of searching through all available sources such as government reports of geological explorations, private diaries of explorers and pioneers , contemporary magazines, books and newspapers .

A Preliminary Study Of The Flora Of The Henry Mountains Of Utah, W. D. Stanton

Theses and Dissertations

The Henry Mountains from the standpoint of plant geography are among the most interesting in the Rocky Mountain Region for they are entirely surrounded by desert and their unique location results in an intermingling of southern , eastern , and northern forms in the flora of this vicinity . In spite of these facts very little collecting or floral study has been done here and the Henry Mountains are still almost unknown floristically . This is unfortunate for much of the original vegetation has changed due to overgrazing by sheep . This preliminary study was undertaken with the view of …

The Rise And Development Of The Megagametophyte In Fritillaria Pudica And Fritillaria Atropurpurea, A Thesis Submitted To The Department Of Botany And The Graduate Council Of The Brigham Young University In Partial Fulfillment Of The Requirements For The Degree Of Master Of Science, Bertrand Fereday Harrison

Theses and Dissertations

The purpose of this thesis is to present the results of a morphological investigation of the megagametophytes of two species of Fritillaria. The author has attempted to present the data in sufficient detail to clearly picture the significant features in the histories of this gametophyte generation without unnecessary repetition. The data are presented as their chronological sequence dictates.

The Distribution, Taxonomy And Ecology Of The Genus Salix Of Utah County, Utah, Kenneth Edward Weight

Theses and Dissertations

The purpose or this paper is to make the willows of Utah end especially Utah County familiar to persons of moderate taxonomic skill. The Willow Family has become somewhat neglected by classes in taxonomy and the botanist in general because of not having a key -- except in one or two cases, that takes into consideration characters other than the fruits or capsules. To identify a willow in late summer is almost impossible by the beginning botanist, because few, if any, flowers, fruits and capsules can be found. In this paper external cheracters will be considered in descriptions. It must …

A Text And Manual Of Timpanogos Mosses, Seville Flowers

Theses and Dissertations

This present paper is an attempt to open the field of bryology in the state of Utah. It is necessarily a limited treatment both from the standpointof the number of species and the area. It represents the efforts of one summer's collection and the preparation of the manuscript and illustrations. The collection was taken at Mount Timpanogosby the students of the Alpine Summer School of the Brigham Young University during the 1925 session.