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Full-Text Articles in Life Sciences
Mechanisms Of Native Shrub Encroachment On A Virginia Barrier Island, Joseph Thompson
Mechanisms Of Native Shrub Encroachment On A Virginia Barrier Island, Joseph Thompson
Theses and Dissertations
Species composition, temperature, soil nutrients, and leaf area index (LAI) were recorded across three encroaching Morella cerifera thicket edges and three free- standing shrubs on Hog Island, Virginia to characterize the effect of shrub thickets on the plant community and microclimate. Electron transport rate (ETR) was taken on shrub leaves to determine if microclimate benefits M. cerifera physiology. Species richness was lowest inside shrub thickets. Soil water content and LAI were higher in shrub thickets compared to grassland. Soil organic matter, N, and C were higher inside shrub thickets. Summer and fall maximum temperatures were more moderate in shrub thickets …
Timpanogos Flora, Kelly W. Allred
Timpanogos Flora, Kelly W. Allred
Theses and Dissertations
A comprehensive floristic study of Mt. Timpanogos, Utah County, Utah, was undertaken. The Mt. Timpanogos area is a much used facility in recreation, biology, watershed development, livestock management, and education. It is also representative of a major segment of the overall flora of Utah. This study adds to the ever-increading knowledge of the flora of Utah, and provides a means of identifying the flora of this region, which is basic to any future management.
A Revision Of The Astragalus Lentiginosus Complex For The State Of Utah, Carol Susan Schoener
A Revision Of The Astragalus Lentiginosus Complex For The State Of Utah, Carol Susan Schoener
Theses and Dissertations
The taxonomy and distribution of the Astragalus lentiginosus complex in Utah is presented. The nine varieties are listed and a key is provided which allows determination of the members of the complex in Utah. Each entity is discussed and illustrated. Two distribtuion maps are included for each variety, one showing the distribution in Utah and the other, the general range of the entity. The body of this work is based on the study of herbarium specimens and field observations and collection. These studies have resulted in the synonymizing of two varieties, the inclusion of another and one nomenclatural change.
A Flora From The Dakota Sandstone Formation Near Westwater, Grand County, Utah, Samuel R. Rushforth
A Flora From The Dakota Sandstone Formation Near Westwater, Grand County, Utah, Samuel R. Rushforth
Theses and Dissertations
A cretaceous (Cenomanian) flora from the Dakota Sandstone Formation near Westwater, Grand County, Utah contains an admixture of ferns and angiosperms. The ferns of this flora are representative of an older Jurassic-Wealden vegetational type, whereas the angiosperms are typical of the modern vegetational type. Species of Gleichenia and Matonidium and Astralopteris coloradica represent the dominant forms in this flora. The Westwater flora contains fourteen genera including nineteen species and one variety. New species described from this flora include Asplenium dakotensis, Coniopteris westwaterensis and Ilex serrata.
Flora Of The National Reactor Testing Station, N. Duane Atwood
Flora Of The National Reactor Testing Station, N. Duane Atwood
Theses and Dissertations
The National Reactor Testing Station (NRTS) is located along the western edge of the upper Snake River Plain in southeastern Idaho. The area covered in this study comprises 894 square miles of rolling to broken land. The plain is broken by three large buttes, all volcanic in nature. The Snake River Plain was formed by the interbedding of volcanic rocks, lake, and alluvial deposits. The alluvial deposits are Quaternary in age as are the basalt flows, and the three buttes are middle Teritary. The vegetation is semi-desert and belongs to the northern desert shrub biome. Annual precipitation at the station …
Vegetational Changes In A Mountain Brush Community Of Utah During Eighteen Years, Robert J. Eastmond
Vegetational Changes In A Mountain Brush Community Of Utah During Eighteen Years, Robert J. Eastmond
Theses and Dissertations
This vegetational analysis is concerned with changes which have cocurred since 1949 in a mountain brush community within an exclosure in the central Wasatch Mountains. The exclosure, established in 1949, is located in Pole Canyon on lower Provo Canyon. Two major studies have been conducted previously, but it has been nine years since the last intensive work was done. Several major changes occurring during the eighteen year period are evident and are described.
A Taxonomic And Ecological Survey Of The Algae Of Lilly Lake, Ann C. Palmer
A Taxonomic And Ecological Survey Of The Algae Of Lilly Lake, Ann C. Palmer
Theses and Dissertations
A taxonomic and ecological survey of the algae of Lilly Lake in the Uinta Mountains, Utah, was carried on from June 1967 to November 1967. The lake is a typical acid bog lake with an average pH range of 4.5 to 6.9. Extremes of pH in the alkaline range were present due to additional factors. Algae identified included 96 genera and 208 species. These were found in many different types of microenvironmental niches. The main factors which limited the algae to definite areas of the lake were pH, water temperature, light available, and type of substrate. The predominant algal genera …
A Flora Of The Beaver Dam Mountains, Larry Charles Higgins
A Flora Of The Beaver Dam Mountains, Larry Charles Higgins
Theses and Dissertations
In this study an attempt was made to collect all plant species growing on the Beaver Dam Mountains, and to arrange them into a workable flora of the area. A study was also made of the collections in the herbaria of Brigham Young University and Dixie Junior College. From this information keys and descriptions for all plant families and genera were written, as well as keys to all the species. For each species the following information was also given; the distribution in North America, the elvational range, period of flowering, and the location on the Beaver Dam Mountains in which …
An Ecological Life History Of Budsage In Western Utah, Benjamin W. Wood
An Ecological Life History Of Budsage In Western Utah, Benjamin W. Wood
Theses and Dissertations
The ecological life history of budsage (Artemisia spinescens D.C. Eaton) was investigated during 1963 and 1964. The field studies were conducted at the Desert Experimental Range in Millard County, Utah. Laboratory studies were done at Brigham Young University. The different community types in which budsage grows were described and the physical site factors, viz. climate, soil texture, total soluble salts, hydrogen ion concentration of the soil, carbonate content and soil moisture were investigated. Phenology of seedlings, root systems, shoot and flower development, and plant longevity were investigated. Studies were also made on the effects of different seasons and intensities of …
Changes In The Vegetation Of Two Restricted Areas Of The Wasatch Plateau As Related To Reduced Grazing And Complete Protection, Hyrum B. Johnson
Changes In The Vegetation Of Two Restricted Areas Of The Wasatch Plateau As Related To Reduced Grazing And Complete Protection, Hyrum B. Johnson
Theses and Dissertations
An understanding of the interactions betnen vegetation and livestock grazing is of paramount importance to the welfare of the livestock industry. It is also important to know how these interactions affect the balance of the ecosystem. In general, observations of changes in vegetation provide an index for evaluating such interactions. Vegetation change is the main object of consideration in this paper. The study is concerned with some of the oldest pemanent native vegetation study plots in the Western United States. They are located on Horseshoe Flats of the Wasatch Plateau in Central Utah.
Vegetational Changes Of The Uinta Basin Since Settlement, Bernard Curtis Dastrup
Vegetational Changes Of The Uinta Basin Since Settlement, Bernard Curtis Dastrup
Theses and Dissertations
A general survey of the vegetational changes of the rangelands of the Uinta Basin was made using historical records, documents, interviews, and recent vegetational surveys. Historical vegetatienal information about the Uinta Basin is very limited, most of it pertaining to the vegetation along the streams and rivers. Escalante, in 1776, mentioned the splendid groves of cottonwoods, the fine pastures, and the abundance of game along the rivers. Ashley in 1825 and Powell in 1870 entered the Basin via the Green River. Ashley crossed the Basin following the Duchesne River and its tributary the Strawberry River. He described the groves of …
An Ecological Study Of An Exclosure In The Mountain Brush Vegetation Of The Wasatch Mountains, Utah, Elray S. Nixon
An Ecological Study Of An Exclosure In The Mountain Brush Vegetation Of The Wasatch Mountains, Utah, Elray S. Nixon
Theses and Dissertations
This is a comparative study of the vegetation and soils of an exclosure in the mountain brush vegetation of the Wasatch Mountains, Utah. The exclosure was fenced and initially analyzed during the summers of 1949-1950. The study area is located in Pole Canyon in the Uinta National Forest, a few miles northeast of Provo, Utah. The dominant woody species of the vegetation in the exclosure are big toothed maple (Acer grandidentatum) and Gambel oak (Quercus gambelii). After settlement of the area in and around Provo, Pole Canyon became overgrazed by livestock. Since 1949 the area has been protected from grazing. …
A Study Of The Plant Ecology Of Salt Lake And Utah Valleys Before The Mormon Immigration, John Homer Wakefield
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 .