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 67 for “"Mojave Desert"”.
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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 diversity and abundance of annuals in the deserts of the Southwestern United States. I characterized shrub distribution and soil parameters on and off rodent mounds in a Coleogyne ramosissima community in Lucky Strike Canyon near Las Vegas, Nevada and performed several experiments to …
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Impact of military maneuvers on Mojave Desert surfaces: A multiscale analysis
… Minor stresses on surface materials in sensitive desert landscapes can greatly increase the rate and character of erosion. The National Training 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 …
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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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Sources And Controls Of Reactive Nitrogen Gas Emissions From A Mojave Desert Ecosystem
… processes in reactive N gas emissions from desert soils. Combination of laboratory and field measurements show that abiotic reactions are a key component of N loss from desert soils, both under dry conditions and during post-wetting periods. It is hypothesized that during the summer, extreme …
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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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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
… of off-road vehicle impacts in the California Desert Conservation Area (CDCA). These impacts were assessed in three usage categories: tank tracks in the maneuvers areas; roadways, which were used primarily by jeeps and trucks; and tent areas, cleared areas in which tents and other …
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A comparative analysis of plant response parameters : to the Los Angeles aqueduct systems in the Mojave Desert, California
… at the impacts of man-made constructions in the Mojave Desert.</p> <p>Land managers and ecologists are particularly interested in answering the questions, how did the Mojave Desert perennial vegetation respond to a utility construction, such as the Los Angeles aqueduct, and what is the intensity …
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Mojave Desert restoration: drought and facilitation influences on plant communities and soil seed banks in annual grass invaded shrublands
… across the western United States, including the Mojave Desert. Their prolific seed production and rapid spread pose significant threats to native flora and wildlife habitats. These invasive grasses alter fire cycles, degrade habitats, and reduce biodiversity. In desert ecosystems, soil seed banks …
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The genes must flow: using movement ecology to understand connectivity of Mojave desert tortoise (Gopherus agassizii) populations in altered landscapes
… to maintain gene flow across a landscape. The Mojave desert tortoise (Gopherus agassizii) is a threatened species of the southwestern United States that historically had range-wide genetic connectivity. Human activity has and continues to alter and fragment tortoise habitat and …
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