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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
241

The Impact of Engagement With Community Supported Agriculture on Human Attitude Towards the Sustainable Food Movement

Cano, Ariana Margarita 01 January 2015 (has links)
With a total of 164 community supported agriculture programs (CSA), Vermont is leading the "locavore" movement in the United States, ranked number one in the country with the most CSAs and Food Hubs per capita. ("Locavore Index," 2013) CSAs have a large positive impact on reducing carbon emissions, advancing local economic growth, and promoting healthy lifestyles of consumers. The purpose of this study is to explore the overall experience of individuals in comparison to their current social norm, individual attitudes, identity, and intentions of change, and understand any change overtime in their individual attitude and behavior. Attitude change was measured by conducting pre and post surveys of the Intervale Food Hub UVM student members, as well as regression analysis to understand any possible indicators of chance. The data analysis provided understanding of the impact of the Intervale Food Hub's CSA membership on individuals' attitudes, norms, and identity. Survey questions, based on the theory of planned behavior, inquired about individuals' preferences, skills, and behavioral intentions. Because of the complexity of food and human relations, this data was be supplemented by collecting qualitative data to more richly understand the relationship between individuals and their Intervale Food Hub food shares. The conclusion of this study will advance understanding of one form of community supported-agriculture and its impact on human attitudes. Study findings will also aid the staff of the Intervale Food Hub in understanding their customers and implementing more efficient practices.
242

Coastal Land Loss and Collaborative Resource Governance: The Case of Plaquemines Parish, Louisiana

Seth, Nandini 18 December 2014 (has links)
The research, presented here, is about the collaborative governance and adaptive management in coastal planning efforts of Louisiana. Fundamental conflict, between the idea of environmental conservation and developmental growth, has always existed in the coastal regions. The presence of the large number of environmental laws, at various levels of government and their different management objectives for utilization of coastal resources, requires study of intergovernmental relationship. Taking Plaquemines Parish as a case in point, this thesis will, therefore, review the critical restoration plans for intergovernmental coordination and conflicts. It will also provide recommendations, for elected representatives and policy makers, with an aim to promote collaborative governance and improve adaptive management of coastal resources.
243

La chasse commerciale en Afrique centrale : une menace pour la biodiversité ou une activité économique durable ? : Le cas de la république centrafricaine / Commercial hunting in Central Africa : a threat for the biodiversity or a sustainable economic activity ? : The case of Central African Republic

Fargeot, Christian 17 December 2013 (has links)
En Afrique centrale, la chasse commerciale contribue fortement au ravitaillement en protéines des ménages en milieu villageois comme en milieu urbain. Elle est accusée de surexploiter la ressource faune, d’avoir un impact très négatif sur la biodiversité animale et sur la régénération forestière et de faire naître des risques importants de développement de maladies émergentes. A partir du cas centrafricain, nous voulons montrer que : la chasse commerciale s’inscrit dans une histoire longue, qui débute avec la colonisation européenne et se poursuit sans rupture, mais avec des acteurs différents, jusqu’à nos jours ; les prélèvements portent principalement sur la faune petite et moyenne qui présente une dynamique naturelle de reproduction très forte et qui supporte bien des pressions de chasse élevées ; la venaison, surtout la viande boucanée, joue un rôle important pour la sécurité alimentaire des ruraux et des urbains les plus pauvres ; la distribution de ce produit vivrier fait intervenir différents acteurs de l’économie informelle ; la filière est illégale, mais jamais criminelle ; la viande de chasse n’est pas en accès libre, mais la filière est fortement régulée par des contraintes sociales, économiques, géographiques et techniques. A partir de ces constats, nous proposons une nouvelle approche politique de la gestion de la faune en Afrique centrale, privilégiant une gestion adaptative de la faune commune sur la base des territoires villageois, recentrant l’Etat sur ses fonctions régaliennes d’organisation de la sécurité alimentaire globale de la population et réorientant la recherche vers la biologie de la petite faune et l’appui technique aux collectivités locales. / In central Africa, commercial hunting strongly contributes to the protein supply of rural and urban households. It is accused of wildlife resources overexploitation, with very negative impacts on animal biodiversity and forest regeneration and with important risks of emergent diseases development. From the Central African Republic case, we want to show that: commercial hunting has a long history, which begins with European colonization and goes on until today, without breaking, but with different actors ; takings mainly focuse small and medium wildlife which naturally has very strong dynamics of reproduction and which supports high pressures of hunting; Bushmeat, especially smoked meat, plays an important part for food safety of rural and urban poorest; distribution of this food products involves various actors of informal economy; this sector is illegal, but never criminal; bushmeat is not in open access, but the network is strongly controlled by social, economic, geographical and technical constraints. From these reports, we propose a new policy approach to wildlife management in central Africa, favoring an adaptive management of common fauna based on village territory, focusing State on its kingly functions to organize proteinic food safety for all people and orientating research towards small fauna biology and local communities technical support.
244

Estimating Heat-Related Mortality in the U.S. and In China Using Downscaled Climate Projections

Li, Ying, Zhang, Wei 07 April 2017 (has links)
Public health effects associated with rising temperatures resulted from global climate change are expected to increase significantly in this century. Projecting future heat-related mortality is challenging due to some considerable uncertainties, and national-level impacts under the latest greenhouse gas emission scenarios remain unexplored. This study investigates future excess heat-related mortality in two large countries: The United States and China in 2050s under the latest Representative Concentration Pathways (RCPs) emission scenarios. Using model-simulated future and present climate variables that were dynamically downscaled, we quantify the potential increase in heat-related mortality during the warm season. We study the entire continental U.S. and 51 largest urban areas in China, which roughly account for one third of population in China. We derive heat mortality risk estimates and adaptation assumptions from a comprehensive review of current literature of temperature-mortality relationships in both countries. We incorporate the latest population projection in both countries, and also investigate geographical variations in heat mortality risk and sources of uncertainty including population adaptation. Our findings suggest that future heat mortality risk attributable to elevated warm season temperature is likely to be significant in both countries studied, with substantial geographic variations, highlighting the significance of climate mitigation and local-level heat risk management.
245

Water Management Efficiency in the Food and Beverage Industry

Reyes Torres, Maria Del C 01 January 2016 (has links)
Water is critical for food production, food security, and health. Water quality management influences freshwater sustainability, land, and energy administration. Global agriculture accounts for more than 70% of all water consumption; the fertilizer, manure, and pesticide overspills are chief sources of water pollution worldwide. On a global scale, food-related waste directly impacts local food production and water resource management. The purpose of this multiple-case study on the food and beverage (FB) industry in the State of Georgia was to identify successful strategies for improving water management efficiency. The concepts of systems thinking, adaptive resource management, and integrated water resource management provided the conceptual framework for the study. Data were collected via personal interviews with 2 global supply chain leaders in the FB industry and 1 water expert in the public water utility system in Georgia. The findings showed 10 themes: sustainability; mission-driven culture; ethical responsibility; water quality and governance; food safety and sanitation; water conservation and climatic trends; waste management; nutrition and the freeze drying method; knowledge sharing and collaboration; and water detention and retention systems. The study results are intended to contribute to social change by providing information to global supply chain leaders, policy makers, entrepreneurs, and sustainability leaders to implement sustainability beyond the environmental value; these findings will also help achieve a positive posture on resource overconsumption and waste management for efficient and complex decision making within a worldwide spectrum.
246

EVALUATION OF A SEQUENTIAL POND SYSTEM FOR DETENTION AND TREATMENT OF RUNOFF AT SKYPARK, SANTA'S VILLAGE

Caporuscio, Elizabeth 01 December 2018 (has links)
Understanding the extent to which human activities impact surface water resources has become increasingly important as both human population growth and related landscape changes impact water quality and quantity across varying geographical scales. Skypark, Santa’s Village is a 233.76-acre tourism-based outdoor recreation area located in Skyforest, California residing within the San Bernardino National Forest. The park is situated at Hooks Creek, the headwaters of the Mojave River Watershed, and is characterized by a diverse landscape that includes forest cover and human development, including impervious surfaces, a restored meadow, and recreational trails. In 2016, Hencks Meadow was considered degraded by human activity and restored by the Natural Resources Conservation Services (NRCS) using best management practices (BMPs) to manage stormwater runoff and mitigate pollutants entering recreational downstream surface water. Three BMP detention basins were constructed to store and improve water quality from stormwater runoff. The purpose of this study is to observe the extent to which the engineered BMP detention basins design were effective in mitigating stormwater pollution from entering Hooks Creek. Over a six to eight month period (January to August), ponds were tested in situ bi-weekly for temperature (ºC), dissolved oxygen (mg/L), pH, turbidity (NTU), conductivity (µS/cm), nitrate (mg/L), and ammonium (mg/L), with additional laboratory tests for total suspended solids (mg/L), total dissolved solids (mg/L), chemical oxygen demand (mg/L), total coliform (MPN/100mL), Escherichia coli (MPN/100mL), and trace metals (µg/L). The results of this study support that the BMP design is improving surface stormwater runoff from impervious surfaces before it enters Hooks Creek. Findings could also promote the design and implementation of stormwater BMP detention basins at other site locations where water degradation is evident. Furthermore, this research can be used to promote the necessary improvement of water quality and quantity on a widespread geographical scale.
247

Environmental Gradients, Community Boundaries, and Disturbance the Darlingtonia Fens of Southwestern Oregon

Tolman, Deborah A. 01 January 2004 (has links)
The Darlingtonia fens, found on serpentine soils in southern Oregon, are distinct communities that frequently undergo dramatic changes in size and shape in response to a wide array of environmental factors. Since few systems demonstrate a balance among high water tables, shallow soils, the presence of heavy metals, and limited nutrients, conservative efforts have been made to preserve them. This dissertation investigates the role of fire on nutrient cycling and succession in three separate fens, each a different time since fire. I specifically analyze the spatial distributions of soil properties, the physical and ecological characteristics of ecotones between Jeffrey pine savanna and Darlingtonia fens, and the vegetation structure of fire-disturbed systems. Soil, water, and vegetation sampling were conducted along an array of transects, oriented perpendicular to community boundaries and main environmental gradients, at each of the three fens. Abrupt changes in vegetation, across communities, were consistently identified at each of the three sites, although statistical analysis did not always identify distinct mid-canopy communities. Below-ground variables were likewise distinguished at the fen and savanna boundary for two of the three sites. At the third site, discontinuities did not align with the fen boundaries, but followed fluctuations in soil NH4. My results suggest that below-ground discontinuities may be more important than fire at preserving these uniquely-adapted systems, while vegetation undergoes postfire succession from fen to mid-canopy to savanna after approximately 100 years since fire. Although restoration of ecosystem structure and processes was not the primary focus of this study, my data suggest that time since fire may drive ecosystem processes in a trajectory away from the normal succession cycle. Moreover, time since fire may decrease overall vigor of Darlingtonia populations.
248

The Effects of Urbanization and Human Disturbance Upon Plant Community Structure and Bird Species Richness, Diversity, and Abundance in a Natural Forested Area (Forest Park) in Portland, Oregon

Broshot, Nancy Ellen 01 January 1999 (has links)
The effects of urbanization and continual human disturbance on the plant and avian communities of Forest Park and forested lands surrounding Portland, Oregon, were studied. I examined characteristics of plant and avian communities at 25 sites, 24 which were in Forest Park and surrounding areas and one which was in the Ancient Forest Preserve (old-growth stand) northwest of Forest Park. Data were analyzed using multiple regression, ANOV A, and Bonferonni/Dunn. Seven variables were selected representing different urbanization gradients. An additional covariable coded for the old-growth stand, allowing it to be used as a control. Many tree variables, especially those related to shade-tolerant species, were positively correlated with both the distance from downtown Portland and the number of houses in the surrounding area, and negatively correlated with the distance from the nearest forest edge; however, many shrub and herbaceous variables were negatively correlated with the distance from downtown Portland. Species diversity for herbaceous and shrub species was greater at more urban sites, but diversity of trees was lower at more urban sites. There were significantly more non-native species of plants in the city section. I found significantly fewer saplings and small trees, especially shade-tolerant species, in the section of Forest Park closest to downtown Portland, although tree mortality was positively correlated with distance from Portland. Summer bird data revealed significant increases in the abundances of urban and edge species at more urban sites, with concomitant reductions in forest species. There were significantly more ground gleaning birds and short distance migratory species. I also found a significantly greater abundance of birds in the old-growth stand during the winter. This increase was positively correlated with the depth of snow in the nearby Cascade Mountains. My results indicate that Forest Park is apparently progressing in a normal successional pattern with the exception of the city section. The reduction in shade tolerant saplings and small trees in the city section suggest that rate of succession has been slower at more urban sites. Avian data suggest that urbanization affects bird species abundance and guild composition in the more urban areas.
249

Relationship Between Corporate Social Responsibility, Environmental Management, and Profitability

Valentin, Dr. Daisy 01 January 2018 (has links)
The U.S. hospitality industry's profitability has been shifting to environmental management and corporate social responsibility (CSR) practices. Hospitality industries accounted for 5% of the global market in 2015 and are expected to increase by 130% in 2035. Grounded in stakeholder theory, this correlation study examined the relationship between corporate sustainability officer (CSO) CSR, CSO environmental management, and hospitality business profitability. Secondary data were collected from 97 hotel websites of the Minneapolis-St. Paul, Minnesota area from 2014 to 2016. The multiple linear regression combinations of CSR and environmental management (EM) measured significantly related to the profitability index, F(3, 93) = 4.67, p < .001, adj. R2 = .13. The sample multiple correlation coefficients were .36, indicating approximately 13% of the variance of the profitability index. The multiple linear regression combinations of CSR measures significantly related to the profitability index, F(2,94) = 6.05, p < .001, adjusted R2 = .11. The sample multiple correlation coefficients were .34, indicating approximately 11% of the variance of the profitability index. The linear combination of EM measures were not significantly related to the profitability index, F(2,94) = 2.91, p < .001, adjusted R2 = .06. The sample multiple correlation coefficients were .24, indicating approximately 6% of the variance of the profitability index. The implications for positive social change include the potential to identify hospitality industry leaders involved in environmental management who have a CSR to promote social change in their communities.
250

Corporate Social Responsibility Implementation Framework

Bonsu, Samuel 01 January 2018 (has links)
As social problems, such as environmental pollution persist, the need to implement corporate social responsibility (CSR) to enhance societal well-being becomes important. However, little is known about how corporate leaders implement CSR. The purpose of this qualitative transcendental phenomenological study was to identify and report the lived experiences of corporate managers relevant to CSR implementation. This study was guided by ecological systems theory, the Porter hypothesis, the Maslow hierarchy of needs theory, and the Harrod-Domar growth model, which justify the importance of societal well-being to business profitability and growth. The research question regarding the lived experiences of corporate managers of CSR implementation aligns with the research problem. A transcendental phenomenological approach was used to identify and report lived experiences of corporate leaders to illuminate understanding of CSR implementation worthy of emulation. Open-ended questions were used in semi structured interviews of purposefully selected managers, based on their lived experiences relevant to CSR implementation, of manufacturing corporations in Charlotte, North Carolina. Van Kaam's phenomenological analysis as explained by Moustakas was used to analyze data. Findings revealed that corporate leaders implemented CSR by donating and volunteering to support health care, nature preservation, education, and poverty reduction. Participants also responded that they supported recycling and use of alternative sources of energy to improve the health and safety of employees and society. The understanding gained from participants' responses can positively affect social change, as participants assessed that CSR implementation resulted in societal well-being.

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