Depuis l’adoption de la politique « Doimoi », le Vietnam a connu un développement économique rapide, conduisant à des transformations de façon significative des paysages dans des toutes les régions du pays. Les aspects du changement des paysages dans les zones urbaines n’ont pas reçu suffisamment l'attention, bien que le Vietnam soit classé un rang élevé en termes de la croissance de la population urbaine et de l'expansion spatiale urbaine en Asie de l'Est au cours de la période 2000-2010. Cette étude vise à analyser la dynamique du paysage et les conséquences environnementales du développement industriel et de l'urbanisation à la zone de la baie d'Ha Long, nord-est du Vietnam. Les principaux objectifs de ce travail sont les suivants: 1) d'analyser les tendances de l'urbanisation et du développement industriel, ainsi que identifier la liaison entre eux dans le contexte régional; 2) de quantifier l'évolution du paysage dans la période de 40 ans (1973-2013) en utilisant les données de la télédétection; 3) de développer une approche holistique pour expliquer les causes fondamentales du changement du paysage; 4) d’analyser les conséquences environnementales du changement du paysage. En conséquence, nous avons développé une méthode intégrée qui est basée sur la combinaison des données du changement du paysage et des données de l'enquête sociale en utilisant une combinaison des méthodes d’analyse multivariée. Cette approche est ouverte et peut être utilisée pour différentes variables à différentes échelles de la recherche. / Since the adoption of Doimoi policy in 1986, Vietnam has experienced a fast economic development, leading to rapid land transformations in the whole regions of the country. Land change aspects of urban areas have not been given adequate attention although Vietnam ranked top of urban population growth and urban spatial expansion in East Asia during the period 2000-2010. This study aims to analyze the landscape dynamics and the environmental consequences of industrial development and urbanization in the Ha Long bay area, Vietnam northeast coast. The principal objectives of the research are: 1) to analyze the trends of urbanization and industrial development, as well as identify the relation between then in the regional context; 2) to quantify the evolution of the landscape in the 40-year period (1973-2013) by using the remote sensing data; 3) to develop a holistic approach to explain the driving forces of the landscape change; 4) to analyze the environmental consequences of landscape change. As result, we have developed an integrated method based on the combination of landscape change data and social survey data using multivariate analysis. This approach is open and can be employed for different variables at various scales of research.

Islands have been characterized based on vegetation and topography as exhibiting different disturbance regimes - reinforcing or resisting. This study had two objectives: quantify barrier island upland migration and vegetation cover change over 32 years (1984-2016), and assess tolerance of two prevalent dune grass species, A. breviligulata, and S. patens to sand burial. Using Landsat imagery from the Virginia Coast Reserve, islands were categorized within the disturbance resistance/reinforcing framework based on dune elevation. Resistant areas were associated with woody cover and low marsh to upland migration while reinforcing areas had low vegetation cover and high rates of migration. System-wide, migration rates increased over time and large losses of upland and marsh, paired with expansions of woody cover occurred. In the field, each grass species was subject to repeated burials. S. patens was able to maintain biomass and height in high rates of burial, whereas A. breviligulata did not survive.

Sugarcane cultivation has played a key role in the development of the Caribbean since the seventeenth century A.D. The Eastern Caribbean island of Antigua in the West Indies was almost exclusively dedicated to sugarcane monoculture from the mid-1600s until its independence from Britain in 1981. This research seeks to better understand the landscape legacies left by long-term sugarcane monoculture at the site of Betty's Hope Plantation in Antigua. This study creates a 400-year simulation of crop yields using the USDA's Erosion Productivity Impact Calculator (EPIC), and evaluates the simulated trajectory of landscape change using historical information about the plantation's agricultural yield and a geoarchaeological analysis of the regional landscape. Findings suggest that some parts of Betty's Hope have experienced degradation due to long-term sugarcane monoculture, but degradation in other parts of the region may be the result of the cessation of commercial agriculture in 1972, when human investment in the highly engineered landscape ended. If these results are representative of other parts of the island, then they suggest that current erosion and degradation experienced today cannot be attributed to intensive plantation agriculture alone, but rather are part of a complex mosaic of human- environmental interactions that includes abandonment of engineered landscapes.

Early land survey records can be used to reconstruct the historical distribution and abundance of tree species prior to the large-scale impact of industrialized societies. Comparing these records to current vegetation patterns enables an examination of the shifts that have occurred in plant communities since the arrival of European settlers in North America. I used presettlement (1859-1874) land survey records from southeastern Vancouver Island and Saltspring Island, British Columbia, Canada to reconstruct the relative abundance and density of tree species in these areas. I then collected equivalent vegetation data from the same points in the modern landscape, which enabled me to compare the two points in time and identify the changes in large-scale vegetation patterns that have occurred since European settlement. My results show a significant increase in the relative abundance of maple (Acer macrophyllum) and cedar (Thuja plicata), and a corresponding decrease in Douglas-fir (Pseudotsuga menzeisii). Furthermore, there has been a considerable increase in tree density in undeveloped areas. The 1859 records indicate that at least one third of the land surveyed was made up of prairies or open “plains,” while a combination of open woods and forests made up the remaining two thirds. Based on comparable density measures from 2007, prairies and plains now represent less than 5% of the undeveloped landscape, while forests comprise nearly 90%. These changes are likely due to a combination of factors that have been influenced by European settlement, most notably logging and fire suppression. The suppression of fire has led to an infilling of trees into previously open areas and has led to the rapid decline of the open prairie and savanna habitat types once common in this area. The results of this study can inform conservation efforts throughout the study area, particularly those involving the restoration of prairie or savanna habitats.

This dissertation examines the development of tourism in Muskoka in the Canadian Shield region from 1860 to 1945. Three key themes are examined: the tourists, the resorts and projected image of the area. When taken together, they provide insight into the origin and evolution of the meanings attached to tourist destinations in the Canadian Shield. The Muskoka Lakes region provides the venue in which continuity and change in each of these elements of the tourism landscape are explored. This dissertation uses previously underutilized primary source materials ranging from hotel ledgers, financial reports, personal correspondence, period brochures, guidebooks, and contemporary newspaper articles to reconstruct the Muskoka tourist experience over an extended period of time. The volume of literature pertaining to American tourism history significantly outweighs similar work conducted on Canadian destinations. This dissertation, therefore, begins with an overview of key works related to the historical development of tourism in the United States followed by a survey of corresponding Canadian literature. The lack of an analytical structure in many tourist historical works is identified as a methodological gap in the literature. A framework is developed to guide data acquisition. Utilizing this framework, the tourists, resorts and images that were projected of Muskoka are examined through five stages of development, from the opening of the region to tourists to the immediate postwar era. The findings from this analysis are used to build an understanding of the changes and continuities in the meanings, or essence, of the Canadian Shield tourist experience. While significant changes are observed in the nature of the tourists, the form and function of tourist lodgings, and the content of projected images, the meaning of the Canadian Shield tourist experience exhibits substantial continuity. From the beginning of tourist development, two opposing perspectives emerge: those of the insider and the outsider. Insiders were thought to be more unpretentious, cognizant of tradition, with a greater sense of belonging in the landscape than the outsiders who were perceived to be pretentious, conscious of societal norms, and a threat to the established traditions of the resort region. The meanings of the destination are informed by the dialogue and tensions between these two perspectives on what a Canadian Shield vacation experience should entail. These meanings, which reflect perceptions of a lifestyle that has been and is continuously under threat from outside forces, persists throughout the stages of tourism development in Muskoka and can be observed in the contemporary period.

Human activities, such as agricultural activity, housing construction, forest logging, etc., play an important role in vegetation changes. Any disturbance to the ecosystem by a severe change in landscape patterns may reduce the survival capacity of certain plant species. In recent years, many studies have used a geographic information system to establish spatial data on vegetation changes; this information includes both the plant species and their spatial structure. Therefore, the aim of this study is to investigate the trends and patterns of vegetation changes and the degree of correlation with the particular environmental features at Wangan Island and Chimei Island in the Penghu Islands, from 1979 to 2009. Both islands have very similar natural features, including geographic location, natural environment, and economic development, but the spatial structures of the land use type are different. The study makes use of geographic information systems, detrended correspondence analysis, canonical correspondence analysis and landscape ecological indicators as study tools. The results are expected to promote our understanding of the spatial distribution patterns of vegetation types and plant species. The results can be divided into three areas. First, both islands follow the same trend with regard to changes in land cover, but the rates of change are different. And the spatial structure of land use types affects the location of land cover types. Example, the centralized and decentralized villages both impact the distribution of the woodland. The mesh and ring road both impact the location of agricultural land. Second, the grassland plant species are correlated with the environmental factors, but the forest plant species are not. The major woodland specie is Leucaena leucocephala on both islands, whose physiological habits may reduce the degree of the correlation. Third, compared to the two islands, Chimei Island is more significant about that the vegetation types are correlated with the neighboring land use types. Finally, the plant species of the local vegetation types could be predicted by changes in the type of land use. In addition, this study has built a trend scheme of the spatial structure changes on Wangan Island and on Chimei Island, which can be used in the island¡¦s future environmental planning.

Early land survey records can be used to reconstruct the historical distribution and abundance of tree species prior to the large-scale impact of industrialized societies. Comparing these records to current vegetation patterns enables an examination of the shifts that have occurred in plant communities since the arrival of European settlers in North America. I used presettlement (1859-1874) land survey records from southeastern Vancouver Island and Saltspring Island, British Columbia, Canada to reconstruct the relative abundance and density of tree species in these areas. I then collected equivalent vegetation data from the same points in the modern landscape, which enabled me to compare the two points in time and identify the changes in large-scale vegetation patterns that have occurred since European settlement. My results show a significant increase in the relative abundance of maple (Acer macrophyllum) and cedar (Thuja plicata), and a corresponding decrease in Douglas-fir (Pseudotsuga menzeisii). Furthermore, there has been a considerable increase in tree density in undeveloped areas. The 1859 records indicate that at least one third of the land surveyed was made up of prairies or open “plains,” while a combination of open woods and forests made up the remaining two thirds. Based on comparable density measures from 2007, prairies and plains now represent less than 5% of the undeveloped landscape, while forests comprise nearly 90%. These changes are likely due to a combination of factors that have been influenced by European settlement, most notably logging and fire suppression. The suppression of fire has led to an infilling of trees into previously open areas and has led to the rapid decline of the open prairie and savanna habitat types once common in this area. The results of this study can inform conservation efforts throughout the study area, particularly those involving the restoration of prairie or savanna habitats.

Engagement is an essential component to community building. Among the factors which contribute to engagement is perception. Of specific interest to landscape architecture are perceptions of landscape and water as they reveal environmental attitudes. Rural Southern Ontario has experienced notable land use pressures for resource extraction and renewable energy. This study explores the relationship between landscape and water perceptions by rural residents and levels of community engagement in a changing rural landscape. Instruments used for this study were a photo-based questionnaire and Visitor Employed Photography. The study found that individuals who are more engaged with the community have a greater ability to interpret landscape in the context of resource extraction and are more critical in their perception of quarry rehabilitation. Findings of this study can assist rural groups by providing insight into social capital and inform landscape planning and design practices when working with rural groups to increase engagement.

Remote ecosystems in Canadian Rocky Mountain parks and protected areas are being pressured by indirect impacts of human activities across the landscape. Ecological impacts can result from a variety of stressors such as climate change, fire suppression and prescription, visitor use, invasive species, and surrounding land-uses. With intensified challenges relating to logistics and moral issues inherent in remote ecosystem management (Higgs and Hobbs, 2010; Higgs and Roush, 2011), managers of these landscapes continue to struggle with questions of "what do we do here?" For ecological restoration and conservation management, historical landscape changes (predominantly following years of fire suppression and rapid climate change) are complicating decisions and our understanding of ecological processes. While intervention may become increasingly necessary for maintaining biodiversity and ecosystem services under conditions of rapid change (Hobbs et al., 2011), direct action may not be the most appropriate tactic, especially when lacking adequate information and foresight (Harris et al., 2006; Higgs and Roush, 2011). This study investigates observable historical remote landscape change in two protected areas in the Canadian Rockies, and examines the resulting implications for management and restoration. Present conditions in Willmore Wilderness Park and Mount Robson Provincial Park were evaluated in a comparative case-study approach. The influence of factors such as jurisdiction, climate, socioeconomics and settlement history were seen to strongly shape how environmental changes impacted management efforts and decisions. Long-term landscape changes were observed through repeat photography with the Mountain Legacy Project. Through focus groups using photo-elicitation with park managers, repeat photo pairs guided discussion. I pursued this research question: "how do long-term landscape changes influence conservation and restoration objectives in remote mountain ecosystems?" This also incorporated subsidiary questions: "what are the inherent challenges in managing (and restoring) remote ecosystems?” and “how could managers of remote ecosystems best approach these issues in the face of rapid ecological change?” Significant landscape changes are observed in both parks and include glacier retreat, forest stand aging, valley infill (encroachment) and upward movement of the treeline ecotone. While ecological changes are seen as significant and as threatening to various park values and public safety, efforts to better understand these changes or address them are limited. The majority of remote ecosystem management efforts in both parks are indirect (passive), with the exception of fire management. This is largely due to capacity and resource constraints, and agency recreation mandates and visitor needs monopolizing manager focus. Suggested restoration efforts would assist climate adaptation and reduce indirect impacts without placing notable pressure on remote ecosystems. The use of repeat photography for monitoring of ecological change is a strong possibility for parks management, particularly if public engagement through citizen science was implemented to minimize dependence on management resources. / Graduate / 0368 / 0768 / jlfalk@uvic.ca

Remote ecosystems in Canadian Rocky Mountain parks and protected areas are being pressured by indirect impacts of human activities across the landscape. Ecological impacts can result from a variety of stressors such as climate change, fire suppression and prescription, visitor use, invasive species, and surrounding land-uses. With intensified challenges relating to logistics and moral issues inherent in remote ecosystem management (Higgs and Hobbs, 2010; Higgs and Roush, 2011), managers of these landscapes continue to struggle with questions of "what do we do here?" For ecological restoration and conservation management, historical landscape changes (predominantly following years of fire suppression and rapid climate change) are complicating decisions and our understanding of ecological processes. While intervention may become increasingly necessary for maintaining biodiversity and ecosystem services under conditions of rapid change (Hobbs et al., 2011), direct action may not be the most appropriate tactic, especially when lacking adequate information and foresight (Harris et al., 2006; Higgs and Roush, 2011). This study investigates observable historical remote landscape change in two protected areas in the Canadian Rockies, and examines the resulting implications for management and restoration. Present conditions in Willmore Wilderness Park and Mount Robson Provincial Park were evaluated in a comparative case-study approach. The influence of factors such as jurisdiction, climate, socioeconomics and settlement history were seen to strongly shape how environmental changes impacted management efforts and decisions. Long-term landscape changes were observed through repeat photography with the Mountain Legacy Project. Through focus groups using photo-elicitation with park managers, repeat photo pairs guided discussion. I pursued this research question: "how do long-term landscape changes influence conservation and restoration objectives in remote mountain ecosystems?" This also incorporated subsidiary questions: "what are the inherent challenges in managing (and restoring) remote ecosystems?” and “how could managers of remote ecosystems best approach these issues in the face of rapid ecological change?” Significant landscape changes are observed in both parks and include glacier retreat, forest stand aging, valley infill (encroachment) and upward movement of the treeline ecotone. While ecological changes are seen as significant and as threatening to various park values and public safety, efforts to better understand these changes or address them are limited. The majority of remote ecosystem management efforts in both parks are indirect (passive), with the exception of fire management. This is largely due to capacity and resource constraints, and agency recreation mandates and visitor needs monopolizing manager focus. Suggested restoration efforts would assist climate adaptation and reduce indirect impacts without placing notable pressure on remote ecosystems. The use of repeat photography for monitoring of ecological change is a strong possibility for parks management, particularly if public engagement through citizen science was implemented to minimize dependence on management resources. / Graduate / 0368 / 0768 / jlfalk@uvic.ca