Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 89 for “"Mojave"”.
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Avian habitat relationships in the Mojave Desert
… over three years (1994-1996) in a variety of Mojave Desert habitat types. This study addressed two fundamental questions: what plant community characteristics are statistically related to bird species diversity and the density of individual bird species, and what is the affect of neighboring …
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Heat shock proteins in Mojave Desert dragonflies
Temperature plays a crucial role in the constant interaction between organisms and the environment. It affects development and rates of physiological functions as well as survival of organisms.
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Heat shock proteins in Mojave Desert dragonflies
Temperature plays a crucial role in the constant interaction between organisms and the environment. It affects development and rates of physiological functions as well as survival of organisms.
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Facilitation of Yucca brevifolia recruitment by Mojave Desert shrubs
Yucca brevifolia is distributed throughout a broad range of plant communities. Open substrate dominates the study areas, however a large majority of Y. brevifolia seedlings were found growing under the canopy of other woody shrubs. This pattern of recruitment did not vary by canyon or elevation. …
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Rodent effects on shrubs in a Mojave Desert shrub community
The mounds created by many species of Dipodomys (kangaroo rats) are long-term modifications of the the soil chemical and physical environment which have been shown to increase both the diversity and abundance of annuals in the deserts of the Southwestern United States. I characterized shrub …
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Impact of military maneuvers on Mojave Desert surfaces: A multiscale analysis
… Center, Ft. Irwin, located in the middle of the Mojave Desert, California, provides a study area of intense off-road vehicle (ORV) activity spanning a 50-year period. This study documents a case of concentrated ORV activity on sensitive desert environments, and the resulting environmental …
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Using simulations to predict the genetic connectivity of the Mojave desert tortoise
The Mojave desert tortoise is a threatened species that is facing habitat fragmentation from human development. Understanding the impact of fragmentation on this species is critical for developing appropriate conservation actions, but the effects of habitat fragmentation are often delayed, making …
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Connecting the Plots: Anthropogenic Disturbance and Mojave Desert Tortoise (Gopherus agassizii) Genetic Connectivity
… increasing the risk of population decline. The Mojave Desert historically exhibited high ecological connectivity, but human presence has increased recently, as has habitat disturbance. Human land use primarily occurs in Mojave desert tortoise (Gopherus agassizii) habitat posing risks to the …
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From neglected waste to protected space: An administrative history of Mojave National Preserve
The Mojave National Preserve, a unit of the National Park Service, was created in 1994 in southeastern California. Its 1.6 million acres were used historically for extractive industries such as mining and ranching, and its recent history was shaped by the land's proximity to urban Los Angeles. The …
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Sources And Controls Of Reactive Nitrogen Gas Emissions From A Mojave Desert Ecosystem
… of annual reactive N gas emissions for a Mojave Desert ecosystem, accounting for daily, seasonal and yearly variation in environmental conditions. This annual estimate of 0.1 to 0.6 kg N ha-1 y-1 includes considerable variation, reflecting inter-annual variability in summer precipitation …
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Fecundity of Larrea tridentata and Ambrosia dumosa across a spatially heterogeneous Mojave Desert landscape
Seed dynamics of Larrea tridentata and Ambrosia dumosa were measured for two consecutive years (2000--2001) in microhabitats under adult Larrea, under adult Ambrosia, under non-Larrea/Ambrosia shrubs, in barren open areas, and in open areas with >50% microphytic crust cover. Microhabitat …
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Characterizing Habitat and Densities of the Mojave Desert Tortoise (Gopherus agassizii) at Multiple Spatial Scales
… greatest influence on the distribution of the Mojave desert tortoise (Gopherus agassizii) is key to improving population estimates and better understanding how this species uses their habitat around them. The Mojave Desert tortoise is a federally listed threated species and a key component to …
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AN IMBRICATE MID CRUSTAL SUTURE ZONE: THE MOJAVE-YAVAPAI PROVINCE BOUNDARY IN GRAND CANYON, ARIZONA
The Mojave and Yavapai provinces in southwestern Laurentia contain evolved and juvenile crust respectively, but the nature of their boundary remains uncertain. This paper analyzes the U-Pb-Hf isotopic composition of zircons from both the oldest plutons and metasedimentary rocks in Grand Canyon. My …
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Kinematics and timing of the Pinto shear zone, New York Mountains, northeastern Mojave Desert, California
… of the importance of Mesozoic extension in Mojave Desert and also contribute to the growing body of evidence for syncontractional extension in the Mesozoic Sevier orogen. The Pinto shear zone has a Z-shaped map pattern and foliation in the ∼92--97 Ma Mid Hills adamellite of the Pinto …
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Plant Response Parameters to General Patton's Armored Maneuvers in the Eastern Mojave Desert of California
<p>The purpose of this study, which was undertaken from September, 1977 through June, 1978 was to survey the response of perennial vegetation to General Patton's World War II armored maneuvers. This information will be used to help construct a basis for predicting recovery rates on the effects of …
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