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 19 of 19 for “"Plant Distribution"”.
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Phenology of the European corn borer, Ostrinia nubilalis (Hubner) (Lepidoptera: Pyralidae) in Virginia
… seasonal abundance, within - field and within - plant distribution of first generation European corn borer egg masses were observed in field corn in Bedford County, Virginia. Peak egg mass abundance occurred ca. 200 degree days after the first borer moths were taken in the light traps. The …
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Exploring the potential impacts of global change on the woody component of of South African savannas
… to be the primary factor underlying savanna tree distribution this has not been demonstrated for savanna tree species. Additionally the determinants of individual savanna species distributions have seldom been investigated. The few existing studies are correlative species distribution models based …
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Factors affecting the population dynamics of the green peach aphid, Myzus persicae (Sulzer), on flue-cured tobacco in Virginia
… of temporal development of GPA was a bimodal distribution with the greater proportion of individuals occurring after topping of the crop. Cumulative proportional population growth models using degree-days were able to adequately describe growth of populations only on individual farms. Study of …
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Obsolescence reduction through product segmentation
… First Out (FIFO) technique at its manufacturing plant distribution center instead of distributing goods based on either the demand at each retailer's end or the useable shelf life of the goods being distributed. The two different stages at which a product can turn obsolete are a) when it reaches …
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Potential of Pandora neoaphidis (Remaudière & Hennebert) Humber as a fungal pathogen for the control of tobacco aphid, Myzus nicotianae Blackman, on tobacco
… aphid on tobacco and non solanaceous host plants, within plant distribution of the pathogen in aphids on tobacco, influence of tobacco cultivars and cultural practices on the incidence of the pathogen, methods of artificially introducing the pathogen into tobacco aphid populations and their …
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Stereovision Correction Using Modal Analysis
… as it is used to monitor trends in areas such as plant distribution and urban construction. The use of computer vision, or more specifically stereo vision, is one common method of gathering this information. By mounting a stereo vision system on the wings of an unmanned aircraft it becomes very …
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Estudio de prefactibilidad para la instalación de una planta de producción de barras empanizadas precocidas de pescado amazónico (Piaractus brachypomus)
… of a precooked breaded bars of paco production plant. In “Chapter I. General aspects” the problem, the objectives, the justification of the topic and the hypothesis were determined. In “Chapter II. Market study” presents the description of the product, the analysis of the industrial sector, the …
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A Vascular Flora of the Sacatar Trail Wilderness, Sierra Nevada, California
… prior to 2022 with limited documentation of the plants that occur there. The primary goal of this project was to better document the vascular flora of the Sacatar Trail Wilderness and generate an annotated checklist supported by herbarium specimens. Over the course of this study in 2022 and 2023, …
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Ecological significance of seed traits in the genus Macaranga
… seeds to seedlings is critical in determining plant distribution patterns. This initial stage of recruitment may be strongly influenced by seed mass via effects on the sensitivity to light quality and soil moisture availability for germination, and via susceptibility to predators and pathogens. …
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An assessment of land degradation and alien plants invasion in the Waterberg Biosphere Reserve, Limpopo Province
Land degradation and invasion by alien plants are interconnecting issues that span both natural and socio-economic systems. As a result, addressing the complexity and severity of these pressures requires the use of a multidisciplinary approach. This study aims to assess land degradation and …
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The investigation of regional ecology using 2km x 2km scale botanical distribution data
Tetrad vascular plant data from Staffordshire (VC 39), accumulated 1995 - 2009, were analysed using Two Way Indicator Species Analysis and Principal Components Analysis, explored using GIS, to examine major floristic distribution patterns. Environmental data were also examined using Redundancy …
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Environmental and Digital Data Analysis of the National Wetlands Inventory (NWI) Landscape Position Classification System
… individual landscape positions based on wetland plant indicators, primary and secondary hydrology indicators, and field indicators of hydric soils. Individual NWI landscape position classes were linked to field-validated environmental properties. Measures provided by this analysis indicated that …
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Climate change impacts on habitats and biodiversity : From environmental envelope modelling to nature conservation strategies
… Here could be shown that changes in species distribution, diverse consequences for habitats, changing communities as well as biotic interactions and general aspects of diversity are the major challenges. The potential climatic modifications can alter deeply the distribution of animals and …
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Examining UAV-based LiDAR, Multispectral, Hyperspectral and Precision Photogrammetry Approaches for Tidal Salt Marsh Environments
… is the dominance of a few species of vascular plants tolerant to marine influence. Understanding the environmental drivers controlling the distribution of this vegetation and improving tools to monitor changes in time and space, are urgent for successfully managing the survival of this …
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Distribution patterns of riparian plant species across river of Sardinia and Tuscany
… on the analysis of floristic differences, on distributional trends of functional and ecological groups, alien and endemic species, and also on the application of landscape classifications to be used as surrogate in conservation planning. The main goal is to evaluate similarities and …
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Vliv akumulace na provoz distribuční sítě
Tato diplomová práce v úvodu seznamuje čtenáře s možnými druhy akumulačních technologií elektrické energie, jejich vzájemným srovnáním a využitím. Po uvedení do problematiky navazuje popisem jednotlivých technologií a principů, jež mají v současnosti smysl a uplatnění v praxi. Práce pokračuje částí …
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Implementation of power electronics in nuclear power plants: DC electrical system conceptual design and its financial analysis
… of PE technology to a Nuclear Power Plant electrical system by conceptually designing a DC electrical system and comparing it to a reference AC system. The DC system meets the same design requirements as the AC system does. Furthermore, results from the financial analysis illustrate …