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.
Results
Showing 1 to 19 of 19 for “"Sonoran Desert"”.
-
Moisture transport associated with the summertime North American monsoon.
… and transport of water vapor into the semi-arid Sonoran Desert region of southwestern North America are examined for the July-August wet season. Vertically-integrated fluxes and flux divergences of water vapor are computed for the 8 summers, 1985-1992, from ECMWF mandatory-level analyses …
-
Coupling Agent-Based Models with Bayesian Belief Networks in Social-Ecological Systems Modeling: The Role of Uncertainty in the Resilience of Semi-Arid Riparian Corridors in the Sonoran Desert
… developed in two semi-arid river basins in the Sonoran Desert to represent model social-ecological systems with three sub-systems: social – urban and agricultural water demand, hydrological – pumping groundwater from the aquifer, and ecological – changes in riparian vegetation communities. The …
-
Where the desert ghost roams
… border is a challenging place to survive for a Sonoran pronghorn. Nearly two decades ago, this endangered species faced near extinction in it s only home, an embroiled, increasingly shrinking habitat in Southwest Arizona. There in the Sonoran Desert, a passionate recovery team has dedicated …
-
Molecular phylogenetic studies in nyctaginaceae: patterns of diversification in arid North America
… a clade of annual species centered in the Sonoran Desert. Phylogeographic patterns are present in the genus that may reflect both relatively ancient vicariant events as well as the post-Pleistocene expansion of the Sonoran Desert. Many species in this group are found to be genetically …
-
Sonora’s Sacred Soundscapes --Sones Sagrados Sonorenses—
… across the landscapes and coastlines of the Sonoran Desert.</p>
-
Drinking up the desert
… pygmy owls in Tucson sparked the creation of the Sonoran Desert Conservation Plan. The plan aims to preserve biodiversity in Tucson and surrounding Pima County by limiting development in biologically sensitive areas of the desert. In addition, Pima County is applying for a county-wide Section 10 …
-
Patterns in the Presence of Respiratory Tract Mycoplasmas in Four Species of North American Tortoises
… G. berlandieri (Texas tortoise), G. morafkai (Sonoran desert tortoise), and G. agassizii (Mojave desert tortoise) in populations that were sampled in three replicate sites. We assessed the presence of mycoplasmas using quantitative polymerase chain reactions (qPCR) on DNA extractions from nasal …
-
Intrinsic properties of bone as predictors of differential survivorship
… frequencies from a forensic sample of Arizona-Sonoran desert border crossers (n=380). This study found a correlation between bone length and frequency (rho= 0.46) and significant differences in the mean recovery frequencies for shapes (p < 0.05). Though no correlation was found for skeletal …
-
Multidimensional Spatial Characterization of Plant Invasions in 'El Pinacate y Gran Desierto de Altar' Biosphere Reserve
… viability worldwide. Their effects in the Sonoran Desert ecosystems are a growing concern among ecologists and land managers. We hypothesized that highly dynamic desert environments are unstable, therefore more vulnerable to invasion by exotic plant species. To test this hypothesis we used …
-
Bridging the divide : incorporating local ecological knowledge into U.S. natural resource management
… an intensive examination of two U.S. cases: the Sonoran Desert Conservation Plan in Pima County, Arizona and the evolution of fishery management science in the New England groundfishery. This study confirms academics and practitioners' claims that a major barrier to incorporating LEK is a …
-
Life history strategies in variable environments: Demography, delayed germination and bet-hedging in a desert annual Plantago
… and life history strategies. Annual plants in desert environments are subject to large fluctuations in precipitation, both within and among years. I used a combination of field and laboratory studies to characterize variability in the populations dynamics and life history of a desert winter …
-
Application of thermocouple psychrometers to field measurements of soil moisture potential.
… situ" measurements of moisture potential at a Sonoran desert field site is investigated. An evaluation is made of the effect of variations in soil temperature, moisture content, and solute concentrations on the psychrometric measurements. Moisture potential measurements with the psychrometer …
-
Cloud Ecologies: An Environmental Ethnography of Data Centers
… acoustics, a narrative complex in which the Sonoran Desert wilderness is repeatedly cast as “empty” and “barren” and is thusly figured as the preferred receptacle for the Cloud’s sonic waste (over suburbia), despite settler histories of dispossession and the ongoing presence of indigenous …
-
Physiological and behavioral consequences of reptilian life in the slow lane: Ecology of beaded lizards and rattlesnakes.
Although reptiles are well known for their low energy requirements and high efficiencies of biomass conversion, few studies have addressed the ecology and energetics of species with very low activity levels. I investigated the ecology and energetics of two such reptilian groups: helodermatid …
-
Habitat partitioning by sparrows along an elevational gradient
… wintering along an elevational gradient in the Sonoran Desert of southern California, USA. Sage sparrows (Amphispiza belli), black-throated sparrows (A. bilineata) and dark-eyed juncos (Junco hyemalis) inhabit different vegetation types. Under the food hypothesis, species occupy different …