Life Sciences Commons^™

Nutrition Of Sheep Grazing Foothill Big Game Range In Spring, Kurt J. Kotter

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Sheep with esophageal fistulas were used to determine the daily intake, nutritive content and digestibility of forage at three periods and two stocking intensities during the spring of 1972 on a typical foothill range in northern Utah.

Heavy grazing under a season-long regime did not influence the concentrations of dietary chemical components when compared to moderate grazing; however, it did depress the digestibility of cellulose and organic matter. There was a significant decline in the dietary chemical components due to forage maturation. Digestibility of organic matter and cellulose were significantly higher in the early spring as compared to late spring. …

Seed Reserves In Desert Soils, David W. Goodall, Suzanne J. Morgan

Memorandum

Soil and litter samples were collected from the playa, playa fringe and bajada zones of the Jornada Validation Site. These samples were analyzed for their seed content, special attention being paid to spatial distribution. At the time of sampling, there was little litter on the soil surface, and the litter contained only a small proportion of the total seeds present.

A Study Of The Radiation Quality Under Plant Canopies In The Wave Range 0.4 To 2.5 Microns, Nolasco G. Baldazo

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The spectral distribution of the global radiation from 0.4 to 2.5 microns penetrating deciduous and coniferous canopies were measured during clear days between 10 a.m. and 2 p.m. using a double-quartz monochromator.

In the visible region (0.4 to 0.7 micron) the average relative spectral transmissions under both canopies are about one percent beginning at 0.4 micron and decreasing to about half a percent at 0.67 micron. There is only a small peak in the green (0.55 micron) transmission under deciduous stands while there is none under coniferous canopies. The slightly higher transmission in the blue (0.4 micron) is attributed to …

The Dynamics Of Root Growth And The Partitioning Of Photosynthates In Cool Desert Shrubs, Osvaldo Alberto Fernandez

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This study addresses the nature of physiological and phenological evolutionary strategies of root growth dynamics and energy allocation followed by Atriplex confertifolia, Ceratoides lanata, and Artemisia tridentata growing in their natural cool desert environment.

Root observation chambers with inclined Plexiglass windows were installed in monospecific desert communities of Atriplex confertifolia, Ceratoides lanata and Artemisia tridentata. Soil temperature and water potential measurements taken immediately adjacent to the observation windows indicated a minimal disturbance was caused by the presence of these chambers. For the three species initiation of root growth was observed before initiation of shoot activity, furthermore, active root growth extended …

An Evaluation Of In-Stream Structures Designed To Provide Fish Habitat, Charles H. Call Jr.

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

In-stream concrete structures were studied through model tests and river tests. The model studies indicated that four designs provided good habitat in the model stream. These structures were the inverted weir, the "V" structure, the slab with legs and the cylinder. Through the river studies it was determined that these structures did not influence enough of the total river area to be effective in providing good fish habitat. Also an appreciable amount of yearly maintenance would be required to free the structures from silting in, debris, and vandalism. The slab with legs was the only promising structure.

Factors Contributing To Production And Distribution Of Chihuahuan Desert Annuals, Paul D. Whitson

Memorandum

No abstract provided.

Population Structure, Foraging Behavior And Daily Movements Of Certain Sonoran Desert Birds, S. M. Russell, P. J. Gould

Memorandum

No abstract provided.

Life: A Computer Program For Stochastic Life Table Analysis, C. Romesburg, K. Marshall

Memorandum

No abstract provided.

Phenology And Function Of Sonoran Desert Annuals In Relation To Environmental Changes, Duncan T. Patten, Edward M. Smith

Memorandum

No abstract provided.

Interaction Between A Fossorial Rodent (The Pocket Gopher, Thomomys Bottae) And A Desert Plant Community, Ross E. Dingman, Lex Byers

Memorandum

No abstract provided.

Model For Estimating Water, Salt And Temperature Distribution In The Soil Profile, R. A. Griffin, R. J. Hanks, S. Childs

Memorandum

No abstract provided.

Tucson Basin Validation Site, J. L. Thames

Memorandum

No abstract provided.

A Preliminary Submodel Of Carbon Translocation, W. Valentine, M. Ayyad

Memorandum

No abstract provided.

The Consumption, Utilization And Modification Of Nutritional Resources By The Jackrabbit (Lepus Californicus) In The Mohave Desert, V. H. Shoemaker, K. A. Nagy, W. R. Costa

Memorandum

No abstract provided.

Soil As A Factor In Modelling The Phosphorus Cycle In The Desert Ecosystem, J. J. Jurinak, R. L. Evans

Memorandum

No abstract provided.

Effect Of Soil Water Potential On Soil Moisture Absorption, Transpiration Rate, Plant Water Potential, And Growth Of Artemisia Tridentata, Gaylon S. Campbell, Grant A. Harris

Memorandum

No abstract provided.

Composition And Biomass Contribution Of Lichen And Moss Communities In The Hot Desert Ecosystems, Thomas H. Nash Iii, Sally White, Janet M. Nash

Memorandum

No abstract provided.

Deep Creek Validation Study: Results Of Data Search For Aquatic Model, G. W. Minshall, J. Perry Ii, S. Walrath, C. Nimz, M. Mcsorley, J. Brock

Memorandum

No abstract provided.

Curlew Valley Validation Site, D. F. Balph, R. S. Shinn, R. D. Anderson, C. Gist

Memorandum

No abstract provided.

Gas Exchange, Translocation, Root Growth, And Soil Respiration Of Great Basin Plants, M. M. Caldwell, E. J. Depuit, O. A. Fernandez, H. H. Wiebe, L. B. Camp

Memorandum

No abstract provided.

Study On Generality Of Desert Simulation Model By Using Of Tundra Data, F. E. Wielgolaski, J. Radford, W. G. Valentine

Memorandum

No abstract provided.

Studies On Wood Borers, Girdlers And Seed Predators Of Mesquite, Jeannine Riazance, W. G. Whitford

Memorandum

No abstract provided.

Evaluation Of Critical Soil Properties Needed To Predict Soil Water Flow Under Desert Conditions, W.A. Jury, L.H. Stolzy, J. Letey Jr., L.V. Weeks

Memorandum

No abstract provided.

Gas Exchange And Productivity For Opuntia Spp., Irwin P. Ting, H. B. Johnson, T. A. Yonkers, S. R. Szarek

Memorandum

No abstract provided.

Terrestrial Model: Animal Processes (Version Iii), S. Payne

Memorandum

No abstract provided.

Role Of Annual Grasses And Shrubs In Nutrient Cycling Of Great Basin Plant Communities, Lawrence G. Kline, Cyrus M. Mckell

Memorandum

No abstract provided.

Organic Constituents In Soils, R. L. Westerman

Memorandum

No abstract provided.

Reproduction And Survivorship Of The Lizard, Uta Stansburiana, And The Effects Of Winter Rainfall, Density And Predation On These Processes, Frederick B. Turner, Philip A. Medica, Donald D. Smith

Memorandum

No abstract provided.

Colony Characters Of Termites As Related To Population Density And Habitat, W. L. Nutting, M. I. Haverty, J. P. Lafage

Memorandum

No abstract provided.

Phenology, Productivity And Nutrient Dynamics Of Some Cool Desert Desert Shrubs, Neil E. West, Carol Gunn

Memorandum

No abstract provided.