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 91 for “"semiarid"”.
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Nighttime evapotranspiration in a semiarid climate using a hemispherical chamber
… eastern Bernalillo County, New Mexico, 2012; a semiarid region where annual potential ET losses exceed annual precipitation. The hemispherical chamber is equipped with high-accuracy relative humidity and temperature sensors that measure ET directly using the methods described in Stannard (1988). …
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Studies of the mechanisms of stabilization of organic matter in semiarid soils
… three particle size fractions obtained from two semiarid grassland soils. Microbial transformations of C and P were assessed as indices of relative availability of native forms of these elements. Chemical recalcitrance was hypothesized to increase with increasing particle size. Stabilization by …
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Modellierung von Vegetationsentwicklung und Erosion entlang eines Klimagradienten von mediterran bis semiarid
In dieser Arbeit wurde ein Modell mit einem gitterbasierten Ansatz entwickelt, um im Mediterranen entlang eines Klimagradienten Auswirkungen zu untersuchen, die Klima, Exposition, Hangneigung sowie Störungen durch Feuer und Beweidung auf die Vegetations und Erosionsentwicklung besitzen. Für die …
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The coupled development of terrain and vegetation : the case of semiarid grasslands
The distribution of vegetation in semiarid landscapes organizes as a function of moisture availability, which is often mediated by the form of the land surface. Simultaneously the processes that shape the land surface are influenced by vegetation, mainly because vegetation reduces fluvial erosion. …
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Coupled roles of hydraulic redistribution and sub-surface moisture transport in semiarid ecosystems
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2023-12-01
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Biogeomorphology and soil geomorphology of small semiarid basins, northeastern Arizona : influences of topoclimate and climate variations
… community establishment on hillslopes in this semiarid environment. In small basins formed at the base of Black Mesa escarpment west of Chinle, Arizona, Jurassic sandstones cemented mainly by clay minerals weather by hydration, favoring relatively high erodibility. Two end member slope forms …
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Late Quaternary semiarid eolian system dynamics : distribution, timing, and soil geomorphic controls, Black Mesa, northeastern Arizona, USA
According to the University of New Mexico's Office of Graduate Studies, this dissertation follows a hybrid format; the chapters were written as manuscripts to be submitted to peer-reviewed journals. Chapter 1 was published in the journal Quaternary Research (May, 2011) and chapters 2 and 3 will be …
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Modelling the influence of rainfall variability and different grazing systems on the spatiotemporal dynamics and productivity of semiarid rangeland
This study pursued a two-fold objective: firstly, to broaden our knowledge about the rainfall-plant-animal system dynamics; and secondly, to re-examine the rotational grazing system with modelling as a substitute to field trials.
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Seasonal responses of carbon, nitrogen, and phosphorus cycling to woodland reduction and different organic matter additions in the semiarid Great Basin
… encroached sagebrush ecosystems in the semiarid Great Basin to quantify how organic matter additions affect pools and fluxes of C, N, and P. We found that organic matter additions from woodland reduction altered microbial substrates and C dynamics but that microbial functions that …
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Cover Crop Systems Impact on Biomass Production, Carbon-to-Nitrogen Ratio, Forage Quality, and Soil Health Indices in a Semiarid Environment.
Arid and semiarid agroecosystems of the United States are characterized by perennial challenges of water deficiency including low soil moisture retention, poor soil fertility, and vulnerability to both wind and water erosion. A soil restorative strategy that has been widely practiced to protect and …
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Education for Sustainable Development in a Semiarid Rural Area: a Case Study of a Self-Help Tourist Housing Project in Paraguaná, Venezuela
The sustainable development of arid and semi arid areas in Paraguaná, Venezuela is achievable if the local population can be educated to recognize and overcome the problems that prohibit the areas development. This study is a contribution to an ongoing project in which the local Universities are …
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A agricultura familiar do Seridó potiguar: vulnerabilidade, percepção e adaptação às mudanças climáticas
At the semiarid regions of developing countries the rural population has always been vulnerable to the climatic variations e its consequences. The effects of the semiarid climate, together with other biophysics, social and political-economic factors, impair the agricultural production, generating a …
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Integrated water resources management under uncertainty: exploring interconnected technological, infrastructural and institutional solutions
… growing populations in many of the world's semiarid regions intensify competition for increasingly scarce freshwater resources. Growing urban demands, land-use change, and a changing climate will further exacerbate regional vulnerability to water scarcity. The intensification of these trends …
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Modelagem dos registros de nascimentos com as condições de vida no semiárido brasileiro
The Brazilian semiarid region is the most populous on the planet and presents deficit of development indicators as well as maternal and child care. In the feld of vital statistics there are problems with births underreporting, whose the studies, are useful for monitoring and improving the quality …
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Identificação e caracterização dos estilos fluviais da Bacia Riacho do Tigre-PB
The brazilian northeast semiarid seen only by low rainfall bias, high evapotranspiration and water scarcity, while neglecting issues related to the production dynamics, transport; required for environmental management of the area, not just for political/social issues of water uses. This way, the …
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The relationship between invasive annual grasses and biological soil crust across Eastern Washington
… However, biocrust has been less studied in semiarid regions and its effects on other invasive annual grasses, such as Ventenata dubia, have never been studied. The goals of my project were to I) determine how the relationship between invasive annual grasses and biocrust vary across a …
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