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Full-Text Articles in Life Sciences
Thrips Of The Sagebrush-Grass Range Community In West-Central Utah, Ward Max Tingey
Thrips Of The Sagebrush-Grass Range Community In West-Central Utah, Ward Max Tingey
Theses and Dissertations
Three predominant and economically important shrubs of the sagebrush-grass range community in Utah, namely big sagebrush (Artemisia tridentata Nutt.), rubber rabbitbrush (Chrysothamnus nauseosus (Pall.) Britt.), antelope bitterbrush (Purshia tridentata (Pursh) DC), and a widely re-seeded range grass, crested wheatgrass (Agropyron cristatum (L.) Gaertn.) were sampled during the summers of 1966 and 1967, and yielded twenty species of thrips. Three species (Anaphothrips tricolor Moulton, Chirothrips aculeatus Bagnall, Chirothrips simplex Hood) were new distributional records for Utah. Seven species (Frankliniella n. sp. #1, Frankliniella n. sp. #2, Haplothrips n. sp., Leptothrips n. sp., Oedaleothrips n. sp., Sericothrips n. sp. #1, Sericothrips n. …
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 Study On The Effectiveness Of Precipitation In The Salt Desert Shrub Type, Sam Finley Brewster
A Study On The Effectiveness Of Precipitation In The Salt Desert Shrub Type, Sam Finley Brewster
Theses and Dissertations
The purpose of this study was to measure quantitatively the effectiveness of precipitation by determining the amount and timing (i.e. distribution-in-time) of plant absorption of moisture during the summers of 1965 and 1966. In addition the effectiveness of precipitation was related to some causal factors, especially those factors which help provide a procedure for calculation of this effectiveness.
Distribution Of The Major Plant Communities In Utah, Robert Howard Foster
Distribution Of The Major Plant Communities In Utah, Robert Howard Foster
Theses and Dissertations
Utah is a state containing a complexity of landforms in a unique continental setting which results in a variety of climatic and edaphic conditions. The variety, however, is not expressed on a latitudinal plane from north to south but is primarily altitudinal, changing from the playa or valley floors to the mountain tops. The associated arrangement of vegetation, consequently, is usually according to elevation, the elevation generally regulation precipitation and thus edaphic conditions. Slope exposure and position of landforms relative to storm-tracks are modifiers, and prevent fixed posisions for many vegetation types. Vegetation in Utah is as variable as are …
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 …