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Cytogenetic Studies Of Cercocarpus In Utah, Grant Lloyd Pyrah
Cytogenetic Studies Of Cercocarpus In Utah, Grant Lloyd Pyrah
Theses and Dissertations
Within the genus Cercocarpus H.B.K., commonly called mountain mahogany, there are three species, C. monanus Raf., C. ledifolius Nutt., and C. intricatus S. Wats., that occupy rather distinct habitats in Utah. During the past two years a study of Cercocarpus populations growing throughout Utah has shown not only that hybridization does occur between all three species but that in some instances viable progeny are produced from these F1 hybrids. Despite rather severe isolation barriers, there is sufficient plasticity to permit inter-breeding under certain circumstances.
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.