Matching Items (21)
Description
Epidemiological theory normally does not predict host extinction from infectious disease because of a host density threshold below which pathogens cannot persist. However, host extinction can occur when a biotic or abiotic pathogen reservoir allows for density-independent transmission. Amphibians are facing global population decline and extinction from the emerging infectious disease chytridiomycosis, caused by the fungus Batrachochytrium dentrobatidis (Bd). I use the model species Eleutherodactylus coqui to assess the impact of Bd on terrestrial direct-developing frog species, a common life history in the tropics. I tested the importance of two key factors that might influence this impact and then used laboratory experiments and published field data to model population-level impacts of Bd on E. coqui. First, I assessed the ontogenetic susceptibility of E. coqui by exposing juvenile and adult frogs to the same pathogen strain and dose. Juveniles exposed to Bd had significantly lower survival rates compared with control juveniles, while adult frogs often cleared infection. Second, I conducted experiments to determine whether E. coqui can become infected with Bd indirectly from contact with zoospores shed onto vegetation by an infected frog and from direct exposure to an infected frog. Both types of transmission were observed, making this the first demonstration that amphibians can become infected indirectly in non-aquatic habitats. Third, I tested the hypothesis that artificially-maintained cultures of Bd attenuate in pathogenicity, an effect known for other fungal pathogens. Comparing two cultures of the same Bd strain with different passage histories revealed reduced zoospore production and disease-induced mortality rates for a susceptible frog species (Atelopus zeteki) but not for the less-susceptible E. coqui. Finally, I used a mathematical model to project the population-level impacts of chytridiomycosis on E. coqui. Model analysis showed that indirect transmission, combined with either a high rate of zoospore production or low rate of zoospore mortality, is required for Bd to drive E. coqui populations below an extinction threshold. High rates of transmission plus frequent re-infection could lead to poor recruitment of infected juveniles and population decline. My research adds further insight into how emerging infectious disease is contributing to the loss of amphibian biodiversity.
ContributorsLanghammer, Penny F. (Author) / Collins, James P. (Thesis advisor) / Brooks, Thomas M (Committee member) / Burrowes, Patricia A. (Committee member) / Anderies, John M (Committee member) / Escalante, Ananias A (Committee member) / Smith, Andrew T. (Committee member) / Arizona State University (Publisher)
Created2013
Description
In this study the impact of outside the classroom activities and experiences of study abroad participants on cultural attitude change and perceived cultural competence was investigated. Motives to participate, expectations and outcomes of study abroad programs were also explored. The study used a mixed methods approach and was conducted in three parts including an exploratory sequential component followed by a concurrent embedded component. The exploratory sequential component included a photo elicitation project, the results of which contributed both to the results of the study and the development of the questionnaire used in the concurrent embedded component. The concurrent embedded component used a pre and post-test survey design and included a qualitative writing exercise with select participants between the completion of their pre and post-test questionnaires. The results suggest that study abroad participation does result in changes in both participants' cultural attitudes and cultural competency. It was hypothesized that length of time abroad and the cultural distance of the host country would have an influence on the change in cultural attitudes and cultural competency. As found in previous research, length of time abroad was not found to be a major contributing factor to this change when considering the results of the pre and post-test survey. However, the results of the qualitative studies resulted in many questions about the impact of length abroad. Participants in longer-term programs discussed changes in their cultural attitudes in a more complex way than short-term participants. Longer-term participants expressed changes in their cultural competency differently as well, though not in a way that it can be conclusively said they were more culturally competent. The reverse was the case for cultural distance. Cultural distance was a factor in the changes in cultural competency, however not in cultural attitudes when considering the results of the quantitative component. The qualitative results seem to bring up more questions. While shorter-term participants discussed cultural competency differently than longer-term participants, surprisingly the short-term programs had a higher percentage of participants studying in countries with large cultural distance than did long-term programs.
ContributorsPachmayer, Ara (Author) / Andereck, Kathleen (Thesis advisor) / Nyaupane, Gyan (Committee member) / Timothy, Dallen (Committee member) / Davey, Lynn (Committee member) / Arizona State University (Publisher)
Created2014
Description
Branding and brand management have been top management priorities in the hotel industry. Some researchers have concluded that strong branding would be an efficient way for hotels and hotel chains to differentiate themselves from each other. Recent studies have focused on the establishment of a brand equity model and the relevant causal relationships of the model. Most of these studies have used types of desirability scales examining the importance of individual factors in measuring brand equity. However, they ignore the trade-offs that affect and characterize choice. Particularly, the personal decision process implied by the hierarchical brand equity model is absent. This study proposed two alternative measures of brand equity, analytic hierarchy process (AHP) and conjoint analysis (CA), to address these limitations. The AHP and the CA were compared using several validity measures to aid in selecting efficient methods. This study examined the validity of AHP and CA under two data collection methods applied to hotel branding: paper-based survey and online survey. Result showed that the AHP data collection methods were easier, as well as with respect to saving time and costs. Results also indicated that the AHP is equivalent to the CA with respect to predictive accuracy. Practical differences for hotel branding in attribute preferences were clearly observed between the AHP and the CA. The AHP results were consistent with previous studies by awarding high importance to perceived quality and brand loyalty and lower importance to brand awareness and brand image. Managerial implications were provided for results. In terms of practicality in data collection, the study results revealed that the data gathered online leads to a slightly lower internal and predictive validity. A limitation of this study was that the two methods were not perfectly comparable. Nevertheless, the validity of both AHP and CA seems satisfactory for both methods. The study results also offer useful perspectives to consider when choosing between the two methods, as well as between AHP and CA.
ContributorsLee, Seung-Hyun (Author) / Tyrrell, Timothy (Thesis advisor) / Uysal, Muzaffer (Committee member) / Andereck, Kathleen (Committee member) / Nyaupane, Gyan (Committee member) / Arizona State University (Publisher)
Created2014
Description
Destination image has been explored by studying various aspects of the process of forming a perception about an area and choosing to visit or not. This study uses a variety of theories from previous research which has focused on subsets of factors which influence the overall process to create a model to organize the perception formation and decision making progress into one continuous and interrelated progression. Online questionnaires using Likert scale statements and questions were distributed to participants through Facebook in order to measure and test the model. A total of 266 questionnaires were completed and analyzed using t test, ANOVA, regression, factor analysis, and cluster analysis. The original model from the beginning of the study transformed with the removal of some variables and the alteration of others. The factors that were shown to influence perception of the destination were tourist type and knowledge of the country. Tourists who were more likely to seek new environments and had a higher level of knowledge of the country used in the marketing video had a better perception of the destination before and after the video. Obstacles for deciding to visit the destination were found to be long distances traveling and substitution of alternative destinations. The results show that marketing videos do create a positive change in the perception of the destination, but this alone is not likely enough to influence the decision to visit the destination. Marketing agencies should consider more ways of informing consumers of the destination in addition to commercials so that overall knowledge of the area can be improved. In addition, marketing agencies should target consumers that are interested in visiting new environments by using travel magazine subscriptions, international airline agencies and hotels, and social media groups.
ContributorsHugo, Nichole (Author) / Nyaupane, Gyan (Thesis advisor) / Andereck, Kathleen (Committee member) / Buzinde, Christine (Committee member) / Harrill, Rich (Committee member) / Arizona State University (Publisher)
Created2014
Description
Because of its ability to harbor social values, norms, and beliefs, heritage has always been utilized as an ideological vehicle. One prominent example of politicizing heritage is Chinese red tourism, comprised of state-promoted tours to revolutionary memorial sites. It is expected to generate political, economic, and social benefits, particularly to reinforce the legitimate leadership of the Chinese Communist Party. Statistics show that dramatic market growth in red tourism has occurred over the past decade. Yet it is still heavily driven by the government and thus whether long-term sustainability can be achieved is still questionable.
This dissertation explores the dynamics of red tourism from the perspective of a meaning-making process, where tourism discourses circulate among the processes of production, transmission, and consumption. The results reveal that higher-level government primarily assumes the leading role, whereas local government is largely excluded from strategy making processes and primarily responsible for implementation and operation. Some dissonance exists between higher and lower-level governments in their goals and involvement in red tourism development. Second, intermediaries are not altruistic and attempt to maximize their own benefits. While site interpreters may provide officially authorized narratives, their primary focus is hosting higher-up administrative visitors. On the contrary, tour guides are more customer-oriented, which may lead to officially undesirable interpretations. Third, driven by multiple motives, tourists have increasingly diverse attitudes towards red heritage and participate in various political and non-political activities. A considerable degree of congruence was found between tourists' participation, motivation, memories, and perception. Quantitative results indicate that the majority of tourists have learned about the political significance and/or content of red heritage, and developed more positive attitudes towards, and support for, the CCP and the government, to a certain extent.
This dissertation contributes to current research by adopting a systematic and emic perspective to explore the dynamics of red tourism. Several conceptual frameworks were developed inductively to describe the meaning-making process. Mixed methods were used to learn about tourists' consumption and perceptions of red heritage. Implications regarding enhancing the effectiveness of the meaning-making process, limitations of the study, and potential directions for future research are also discussed.
This dissertation explores the dynamics of red tourism from the perspective of a meaning-making process, where tourism discourses circulate among the processes of production, transmission, and consumption. The results reveal that higher-level government primarily assumes the leading role, whereas local government is largely excluded from strategy making processes and primarily responsible for implementation and operation. Some dissonance exists between higher and lower-level governments in their goals and involvement in red tourism development. Second, intermediaries are not altruistic and attempt to maximize their own benefits. While site interpreters may provide officially authorized narratives, their primary focus is hosting higher-up administrative visitors. On the contrary, tour guides are more customer-oriented, which may lead to officially undesirable interpretations. Third, driven by multiple motives, tourists have increasingly diverse attitudes towards red heritage and participate in various political and non-political activities. A considerable degree of congruence was found between tourists' participation, motivation, memories, and perception. Quantitative results indicate that the majority of tourists have learned about the political significance and/or content of red heritage, and developed more positive attitudes towards, and support for, the CCP and the government, to a certain extent.
This dissertation contributes to current research by adopting a systematic and emic perspective to explore the dynamics of red tourism. Several conceptual frameworks were developed inductively to describe the meaning-making process. Mixed methods were used to learn about tourists' consumption and perceptions of red heritage. Implications regarding enhancing the effectiveness of the meaning-making process, limitations of the study, and potential directions for future research are also discussed.
ContributorsZhao, Shengnan (Author) / Timothy, Dallen J. (Thesis advisor) / Chhabra, Deepak (Committee member) / Lee, Woojin (Committee member) / Nyaupane, Gyan (Committee member) / Li, Wei (Committee member) / Arizona State University (Publisher)
Created2014
Description
As much as 40% of the world's human population relies on rivers which originate on the Qinghai-Tibetan Plateau (QTP) (Xu et al. 2009, Immerzeel et al. 2010). However, the high alpine grasslands where these rivers emanate are at a crossroads. Fed by seasonal monsoon rains and glacial runoff, these rivers' frequent flooding contributes to massive losses of life and property downstream (Varis et al. 2012). Additionally, upstream grasslands, which regulate the flow of these rivers, are considered to be deteriorating (Harris 2010). This thesis examines the regional vulnerability of these rivers and highlights the impacts of several policy responses, finding that both climate change and grassland degradation pose significant challenges to Asia's water security. Additionally, I suggest that many of the responses elicited by policy makers to meet these challenges have failed. One of these policies has been the poisoning of a small, endemic, burrowing mammal and keystone species, the plateau pika (Ochotona curzoniae) (Smith and Foggin 1999). Contrary to their putative classification as a pest (Fan et al. 1999), I show that the plateau pika is instead an ecosystem engineer that actively increases the infiltration rate of water on the QTP with concomitant benefits to both local ecosystems and downstream hydrological processes.
ContributorsWilson, Maxwell (Author) / Smith, Andrew T. (Thesis advisor) / Wu, Jiangou (Committee member) / Hall, Sharon J. (Committee member) / Arizona State University (Publisher)
Created2012
Description
The relationship between biodiversity and ecosystem functioning (BEF) is a central issue in ecology, and a number of recent field experimental studies have greatly improved our understanding of this relationship. Spatial heterogeneity is a ubiquitous characterization of ecosystem processes, and has played a significant role in shaping BEF relationships. The first step towards understanding the effects of spatial heterogeneity on the BEF relationships is to quantify spatial heterogeneity characteristics of key variables of biodiversity and ecosystem functioning, and identify the spatial relationships among these variables. The goal of our research was to address the following research questions based on data collected in 2005 (corresponding to the year when the initial site background information was conducted) and in 2008 (corresponding to the year when removal treatments were conducted) from the Inner Mongolia Grassland Removal Experiment (IMGRE) located in northern China: 1) What are the spatial patterns of soil nutrients, plant biodiversity, and aboveground biomass in a natural grassland community of Inner Mongolia, China? How are they related spatially? and 2) How do removal treatments affect the spatial patterns of soil nutrients, plant biodiversity, and aboveground biomass? Is there any change for their spatial correlations after removal treatments? Our results showed that variables of biodiversity and ecosystem functioning in the natural grassland community would present different spatial patterns, and they would be spatially correlated to each other closely. Removal treatments had a significant effect on spatial structures and spatial correlations of variables, compared to those prior to the removal treatments. The differences in spatial pattern of plant and soil variables and their correlations before and after the biodiversity manipulation may not imply that the results from BEF experiments like IMGRE are invalid. However, they do suggest that the possible effects of spatial heterogeneity on the BEF relationships should be critically evaluated in future studies.
ContributorsYuan, Fei (Author) / Wu, Jianguo (Thesis advisor) / Smith, Andrew T. (Committee member) / Rowe, Helen I (Committee member) / Arizona State University (Publisher)
Created2011
Description
The emergence of social media in concert with improved camera and cell phone technologies has helped usher in an age of unprecedented visual communication which has radically changed the tourism industry worldwide. Serving as an important pillar of tourism and leisure studies, the concept of the tourist gaze has been left relatively unexamined within the context of this new visual world and more specifically image based social media. This phenomenological inquiry sought to explore how image based social media impacts the concept of the tourist gaze and furthermore to discover how the democratization of the gaze in concert with specific features of image based social media applications impacts the hermeneutic circle of the tourist gaze. This in-depth analysis of the user experience within the context of travel consisted of 19 semi-structured photo elicitation interviews and incorporated 57 participant generated photos. Six salient themes emerged from the study of this phenomenon; 1) sphere of influence, 2) exchange of information, 3) connections manifested, 4) impression management and content curation, 5) replicated travel photography, and 6) expectations. Analysis of these themes in conjunction with examples from the lived user experience demonstrate that the tourist gaze is being accelerated and expanded by image based social media in a rapid manner. Furthermore, democratization of the gaze as enabled by technological developments and specialized social media platforms is actively shifting the power role away from a small number of mass media influencers towards a larger number of branded individuals and social media influencers. Results of this inquiry support the theoretical assertions that the tourist gaze adapts to social and technological developments and demonstrates that the concept of the tourist gaze is increasingly important within tourism studies. Practical implications regarding the prevalence of real-time information, site visitation, and “taking only pictures” as sustainable touristic behavior are discussed.
ContributorsCampbell, Brenda Jean (Author) / Nyaupane, Gyan (Thesis advisor) / Lee, Woojin (Committee member) / Stone, Lesego (Committee member) / Arizona State University (Publisher)
Created2018
Description
The purpose of my thesis is to illustrate the story of the black-footed ferret's conservation, and to provide my own suggestions for how to eventually get the species removed from the Endangered Species List, marking a successful rebound in population numbers. I highlight my personal experience working at the Phoenix Zoo's black-footed ferret breeding center. In the first chapter, I present the species by describing its morphology, diet, reproduction, behaviors, range, and habitat. In the second chapter, I recount the chronological history of the conservation of the species, starting with its rediscovery following its putative "extinction", and ending with its present status. In the third chapter, I discuss the threats that have led to the species' overall decline and continue to affect its persistence today. In the fourth and final chapter, I conclude by making recommendations regarding what needs to occur in order to eventually get the species delisted.
ContributorsGeer, Emily Maren (Author) / Smith, Andrew T. (Thesis director) / Minteer, Ben (Committee member) / Wells, Stuart (Committee member) / Barrett, The Honors College (Contributor) / School of Life Sciences (Contributor)
Created2014-05
Description
Throughout history, terrorism has had major effects on tourists and tourism destinations that are targeted. When terrorists execute an attack in order to communicate a message, resulting impacts go far beyond lives lost. Included in these impacts is the fear that terror attacks leave on tourists, sometimes creating such an impression that tourists change travel plans as a result. Although there are many studies on destination image, risk perception, and decision-making, very few focus specifically on the millennial generation. Because millennials are changing the travel and tourism scene - as they now make up the largest percentage of the population \u2014 it is important for stakeholders in the tourism industry and DMOs to understand this shift and the implications that come with these changes. This study provides a qualitative analysis of millennials' views, attitudes, and beliefs regarding terror impacted tourist destinations. Specifically, it will explore how millennials develop their destination images, if millennials view international travel to be risky, and if millennials are willing to travel to terror impacted tourist destinations. Using focus group methodology, this study gathered data from students from a number of disciplines, genders, and travel experience, in order to understand the themes listed above. Analysis of the findings and implications for officials and DMOs follow, as well as a conclusion including limitations and recommendations for future studies.
ContributorsBacon, Laura Elizabeth (Author) / Buzinde, Christine (Thesis director) / Nyaupane, Gyan (Committee member) / Department of Management and Entrepreneurship (Contributor) / W. P. Carey School of Business (Contributor) / College of Public Service and Community Solutions (Contributor) / Barrett, The Honors College (Contributor)
Created2017-05