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Full-Text Articles in Life Sciences
Seed Reserves In Desert Soils, David W. Goodall, Suzanne J. Morgan
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.
An Evaluation Of In-Stream Structures Designed To Provide Fish Habitat, Charles H. Call Jr.
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.
A Study Of The Radiation Quality Under Plant Canopies In The Wave Range 0.4 To 2.5 Microns, Nolasco G. Baldazo
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 …
Nutrition Of Sheep Grazing Foothill Big Game Range In Spring, Kurt J. Kotter
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. …
The Dynamics Of Root Growth And The Partitioning Of Photosynthates In Cool Desert Shrubs, Osvaldo Alberto Fernandez
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 …
The Role Of Algae In Crust Formation And Nitrogen Cycling In Desert Soils, R. I. Lynn, M. C. Vogelsberg
The Role Of Algae In Crust Formation And Nitrogen Cycling In Desert Soils, R. I. Lynn, M. C. Vogelsberg
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
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.
Life: A Computer Program For Stochastic Life Table Analysis, C. Romesburg, K. Marshall
Life: A Computer Program For Stochastic Life Table Analysis, C. Romesburg, K. Marshall
Memorandum
No abstract provided.
Simulations Of Desert Biome Sites Using The General-Purpose Model, C. Gist, David W. Goodall
Simulations Of Desert Biome Sites Using The General-Purpose Model, C. Gist, David W. Goodall
Memorandum
No abstract provided.
A Preliminary Submodel Of Carbon Translocation, W. Valentine, M. Ayyad
A Preliminary Submodel Of Carbon Translocation, W. Valentine, M. Ayyad
Memorandum
No abstract provided.
A Generalized Phenology Submodel For Desert Plants, J. Reynolds
A Generalized Phenology Submodel For Desert Plants, J. Reynolds
Memorandum
No abstract provided.
Physiological Section For The Animal Submodel General-Purpose Model, W. G. Whitford, R. Mishaga, J. Delson, S. Pimm, F. Kay
Physiological Section For The Animal Submodel General-Purpose Model, W. G. Whitford, R. Mishaga, J. Delson, S. Pimm, F. Kay
Memorandum
No abstract provided.
Tucson Basin Validation Site, J. L. Thames
Terrestrial Model: Animal Processes (Version Iii), S. Payne
Terrestrial Model: Animal Processes (Version Iii), S. Payne
Memorandum
No abstract provided.
Distribution And Balance Of Biomass And Nutrients In Desert Shrub Ecosystems, James O. Klemmedson
Distribution And Balance Of Biomass And Nutrients In Desert Shrub Ecosystems, James O. Klemmedson
Memorandum
No abstract provided.
Phenology And Function Of Sonoran Desert Annuals In Relation To Environmental Changes, Duncan T. Patten, Edward M. Smith
Phenology And Function Of Sonoran Desert Annuals In Relation To Environmental Changes, Duncan T. Patten, Edward M. Smith
Memorandum
No abstract provided.
Rock Valley Validation Site, F. B. Turner, J. F. Mcbrayer
Rock Valley Validation Site, F. B. Turner, J. F. Mcbrayer
Memorandum
No abstract provided.
Jornada Validation Site, Walter G. Whitford
Plant Productivity And Nutrient Interrelationships Of Perennials In The Mohave Desert, S. A. Bamberg, A. Wallace, G. E. Kleinkopf, A. Vollmer, B. S. Ausmus
Plant Productivity And Nutrient Interrelationships Of Perennials In The Mohave Desert, S. A. Bamberg, A. Wallace, G. E. Kleinkopf, A. Vollmer, B. S. Ausmus
Memorandum
No abstract provided.
Effect Of Density On The Population Dynamics Of Perognathus Formosus And Its Relationships Within A Desert Ecosystem, Robert M. Chew, Frederick B. Turner
Effect Of Density On The Population Dynamics Of Perognathus Formosus And Its Relationships Within A Desert Ecosystem, Robert M. Chew, Frederick B. Turner
Memorandum
No abstract provided.
Population Structure, Foraging Behavior And Daily Movements Of Certain Sonoran Desert Birds, S. M. Russell, P. J. Gould
Population Structure, Foraging Behavior And Daily Movements Of Certain Sonoran Desert Birds, S. M. Russell, P. J. Gould
Memorandum
No abstract provided.
Classification And Quantification Of Invertebrate Activity And The Role Of Invertebrates In Nitrogen Processing In Plants, Litter And Soil In Curlew Valley, P. R. Sferra
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
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.
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
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.
Study On Generality Of Desert Simulation Model By Using Of Tundra Data, F. E. Wielgolaski, J. Radford, W. G. Valentine
Study On Generality Of Desert Simulation Model By Using Of Tundra Data, F. E. Wielgolaski, J. Radford, W. G. Valentine
Memorandum
No abstract provided.
A Decomposition Submodel, H. Parnas, J. Radford
Pine Valley Validation Site, C. D. Jorgensen, G. Richins
Pine Valley Validation Site, C. D. Jorgensen, G. Richins
Memorandum
No abstract provided.
Ecology Of Cool Desert Annuals, Lionel G. Klikoff, D. C. Freeman
Ecology Of Cool Desert Annuals, Lionel G. Klikoff, D. C. Freeman
Memorandum
No abstract provided.
Phenology, Productivity And Nutrient Dynamics Of Some Cool Desert Desert Shrubs, Neil E. West, Carol Gunn
Phenology, Productivity And Nutrient Dynamics Of Some Cool Desert Desert Shrubs, Neil E. West, Carol Gunn
Memorandum
No abstract provided.
Studies On Wood Borers, Girdlers And Seed Predators Of Mesquite, Jeannine Riazance, W. G. Whitford
Studies On Wood Borers, Girdlers And Seed Predators Of Mesquite, Jeannine Riazance, W. G. Whitford
Memorandum
No abstract provided.