Doctor of Philosophy / Department of Geography / Lisa M. Harrington / Land-change science has become a foundational element of global environmental change. Understanding how complex coupled human and natural systems (CHANS) affect land change is part of understanding our planet and also helps us determine how to mitigate current and future problems. Upland birds such as the Ring-Necked Pheasant (Phasianus colchicus) have been widely studied. While myriad studies have been done that show relationships between land change driving forces and the pheasant, what are not found are long-term, comprehensive approaches that show the historical importance of how past land change drivers can be used to gain knowledge about what is happening today or what may happen in the future. This research set out to better understand how human and natural driving forces have affected land change, pheasants, and pheasant hunting in South Dakota from the early 1900s to the present. A qualitative historical geography approach was used to assemble information from historic literature and South Dakota Game, Fish, and Parks Department annual reports to show the linkages between human and natural systems and how they affect pheasant populations. A quantitative approach was used to gather information from hunters who participated in the 2006 pheasant hunting season. Two-thousand surveys were mailed that gathered socioeconomic data, information on types of land hunted, thoughts on land accessibility issues, as well as spatial information on where hunters hunted in South Dakota. Results from the hunter surveys provided some significant information. Non-resident and resident hunters tended to hunt in different parts of the state. Non-resident hunters were older, better educated, and had higher incomes than resident hunters. Resident hunters, when asked about issues such as crowded public hunting grounds and accessibility to private lands had more negative responses, whereas non-resident hunters, especially those who hunt on privately-held lands, were more satisfied with their hunting experiences. Linkages were also seen between changes in human and natural systems and pheasant populations. Some of the most important contributors to population changes were large-scale conservation policies (Conservation Reserve Program) and agricultural incentives, as well as broader economic issues such as global energy production and national demands for increases in biofuel production (ethanol and biodiesel). Many of the changes in pheasant populations caused by changes in human systems have been exacerbated by changes in natural systems, such as severe winter weather and less-than-optimal springtime breeding conditions.

Master of Arts / Department of Geography / Kevin S. Blake / Monuments and memorials are how we record history on the landscape. History is created, preserved, and remembered by those who envision, design, and ultimately pay a visit to, these sites. The Oregon Trail is replete with interpretive sites relating to various events and people who lived along or traveled this route. From Independence, Missouri to Fort Laramie National Historic Site in Wyoming along the Great Plains section of the trail, Plains Indians are represented in thirty-two sites that convey various versions of history. The majority of these sites, twenty-seven, either ignore the Plains Indians or turn them into a stereotypical form of Sioux. These two representations give a sense that “No One is Home” or that “Siouxification” has occurred, a process by applying Sioux cultural traits to non-Sioux Plains Indians. The other five sites are categorized as “Getting It Right.” These sites either portray an accurate or close-to-accurate representation of the Indians and their role along the Oregon Trail. “No One is Home” is found all throughout the trail; “Siouxification” is clustered in the eastern study area; and “Getting It Right” primarily in the eastern portion.

Doctor of Philosophy / Department of Geography / John A. Harrington Jr / The Senegal River valley and delta (SRVD) are affected by long term climate variability. Indicators of these climatic shifts include a rainfall deficit, warmer temperatures, sea level rise, floods, and drought. These shifts have led to environmental degradation, water deficits, and profound effects on human life and activities in the area. Geographic Information Science (GIScience), including satellite-based remote sensing methods offer several advantages over conventional ground-based methods used to map and monitor salt-affected soil (SAS) features. This study was designed to assess the accuracy of information on soil salinization extracted from Landsat satellite imagery. Would available imagery and GIScience data analysis enable an ability to discriminate natural soil salinization from soil sodication and provide an ability to characterize the SAS trend and pattern over 30 years? A set of Landsat MSS (June 1973 and September 1979), Landsat TM (November 1987, April 1994 and November 1999) and ETM+ (May 2001 and March 2003) images have been used to map and monitor salt impacted soil distribution. Supervised classification, unsupervised classification and post-classification change detection methods were used. Supervised classifications of May 2001 and March 2003 images were made in conjunction field data characterizing soil surface chemical characteristics that included exchange sodium percentage (ESP), cation exchange capacity (CEC) and the electrical conductivity (EC). With this supervised information extraction method, the distribution of three different types of SAS (saline, saline-sodic, and sodic) was mapped with an accuracy of 91.07% for 2001 image and 73.21% for 2003 image. Change detection results confirmed a decreasing trend in non-saline and saline soil and an increase in saline-sodic and sodic soil. All seven Landsat images were subjected to the unsupervised classification method which resulted in maps that separate SAS according to their degree of salinity. The spatial distribution of sodic and saline-sodic soils has a strong relationship with the area of irrigated rice crop management. This study documented that human-induced salinization is progressively replacing natural salinization in the SRVD. These pedologic parameters obtained using GIScience remote sensing techniques can be used as a scientific tool for sustainable management and to assist with the implementation of environmental policy.

Doctor of Philosophy / Department of Geography / Bimal K. Paul / This research set out to better understand the impact of socioeconomic characteristics, environmental risk, and the built environment on health in Mobile County, Alabama. A multilevel statistical analysis was used to identify those characteristics that had the greatest impact on health. The variables determined to be the most significant in defining health in Mobile County were used in the development of a health inequity index (HIQ). The index was used to identify the zip code tabulation areas (ZCTAs) in Mobile County that were likely to exhibit greater health inequality, and as a result, a higher potential for health inequity. In this study, a mailed survey on the built environment and health was conducted to gain a better understanding of the characteristics of individual residences, perceptions of individuals in regards to neighborhood health, citizen activism, and the environmental justice movement. Because there was a low response rate for the mailed surveys, fieldwork with face-to-face interviews was conducted in July, 2009. In conjunction with the survey data, mortality data obtained from the Alabama Department of Public Health was incorporated into the multilevel analysis. Using crude death rate, cause-specific death rate for cancer, and cause-specific death rate for heart disease as dependent variables and factors associated with socioeconomic status, environmental risk, and the built environment as independent variables, multiple linear regression was performed. The results of the multiple linear regression identified factors of socioeconomic status, environmental risk, and the built environment that had the greatest impact on health in Mobile County. Geographically weighted regression was performed to test local model strength by ZCTA in Mobile County. It was determined that the health inequity index developed as a result of the multilevel analysis was a reasonable measure of population health. Calculations of HIQ for each ZCTA in Mobile County helped to identify those ZCTAs most in need of intervention. The ZCTAs with high HIQ values were also those where the built environment was extremely poor, indicating that health is impacted by the places where people live.

Master of Arts / Department of Landscape Architecture/Regional and Community Planning / Lee R. Skabelund / This report presents one approach for increasing understanding, appreciation and protection of watersheds by individuals living within the urban-to-rural lands interface. The purpose of the study is to provide guidance to developing and implementing a driving tour of environmentally sensitive land around Clinton Lake and the Upper Wakarusa Watershed (UWW). Although the tour is particular to the UWW, the principles will be useful to planners and watershed advocates working to promote water quality improvement in other geographic areas. A first step in increasing community involvement to restore and protect watersheds is developing a broader public understanding of what watersheds are and their integral part in daily life. By taking a driving tour (literally or virtually), participants can see firsthand how a watershed functions and the values it provides to people and ecosystems. Two key ingredients in the planning process are public participation and clearly defined goals. Public participation begins with awareness of an issue that impacts lives. The first step in engaging the public is to develop a framework for making residents aware that watersheds are a critical part of their environment and the health of their community. The driving tour of the Upper Wakarusa Watershed should help residents and visitors experience a “sense of place” related to the watershed by achieving three over-arching goals: Develop meaningful themes that engage the residents and visitors in learning about watersheds and give insight to their relationships with the watershed. Introduce concepts that are relevant to the lives of residents and visitors and their understanding of a watershed. Generate a stronger “sense of place” as it relates to the Upper Wakarusa watershed. The driving tour in this report has been designed to serve as a broad blueprint for future implementation. The route was devised to take advantage of area resources, especially those on public land, while adhering to guidelines proven successful in promoting rural areas such as the Flint Hills and Cheyenne Bottoms. The actual implementation of the Upper Wakarusa Watershed Driving Tour is expected to be led by local coalitions, and the precise route should be adjusted as necessary.

Master of Arts / Department of Geography / John A. Harrington Jr / The Rainwater Basin Wetland Complex of south-central Nebraska is a region of great climatic variability, as well as tremendous ecological importance. The Rainwater Basin Wetland Complex is located at the focal point of the Central North American migratory bird flyway, and supports in excess of twelve million birds during the spring migration period. The physical landscape has been significantly altered from its pre-settlement state by agricultural conversion via the draining of over ninety percent of the native wetlands. Due to the region’s highly variable continental climate, interannual wetland water levels are also highly variable and currently unpredictable. I have used multi-year analysis, including the construction of a regional water budget assessment, to study which climatic variables play the most crucial role in the late-winter filling of wetlands. Research objectives were met by analyzing ten cold season (Oct – Feb) climatic variables and an annual measure of wetland area for five years, in order to better understand possible climatic drivers of wetland hydrologic functioning levels in March. Longer time series of winter season climatic information were also assessed to help place the recent and more detailed analysis into a longer climatic context. Research results will aid local management agencies in the future through enhanced knowledge of how climatic variation impacts wetland function. Seasonal precipitation and temperature was favored by the linear regression analysis, while the multiple regression analysis placed higher emphasis on February evapotranspiration rates, February snow depth, and February snowfall. Lastly, the hydrologic water budget that was created for the study area had several highly correlated output variables with basin-wide flooded hectares, particularly annual snow storage.

Master of Arts / Department of Geography / Kendra K. McLauchlan / The quantitative relationship between pollen assemblages in sediment and vegetation cover is largely unknown because many factors influence this relationship. This lack of quantitative relationship is particularly acute in grassland regions, where both past and future climate change have the potential to determine grassland composition and cover. The tool used to reconstruct past grassland cover is the relative abundance of distinct fossil pollen types preserved in sediment. However, the interpretation of grassland pollen assemblages as grassland vegetation types needs to be refined to improve these reconstructions. Using pollen found in the surface sediments from 24 artificially-constructed ponds in the Flint Hills ecoregion of Kansas, USA, I examined relationships between pollen and vegetation in the tallgrass prairie biome, which includes woody components. By comparing the pollen data to field-surveyed vegetation data and land cover classifications taken from Kansas Gap Analysis Program data, I correlated pollen and vegetation in this ecoregion. Pollen productivity estimates for Artemisia, Ambrosia, Asteraceae, Chenopodiaceae, Cornus, Fabaceae, Juniperus, Maclura, Poaceae, Populus, Quercus, and Salix were calculated via the Extended R-Value Model. Common pollen types identified in sediments are mostly herbaceous grassland plant species such as Poaceae, Artemisia, and Ambrosia, but woody plants such as Populus, Quercus, and Juniperus are also represented. PPEs have been calculated for four of these taxa in Europe, and values from the Flint Hills are higher. These are the first PPEs reported for eight of these taxa. This research will further advance quantitative vegetation reconstructions in the Great Plains of North America and refine interpretations of how climate change affects grasslands.

Master of Arts / Department of Geography / Jeffrey S. Smith / In a matter of minutes, a small, western Kansas community by the name of Greensburg was over 95% destroyed by a tornado. After the storm, the community’s civic leaders decided to rebuild Green. As a result, the modified cultural landscape no longer resembled the once familiar town that was viewed as a place of attachment by its predominantly elderly population. The purpose of this thesis is to better understand how the May 4th, 2007, tornado affected the elderly’s emotional connection to Greensburg. To identify how the town’s landscape changed I used before and after photographs. In order to more fully comprehend how their attachment to the community has changed, interviews were conducted with several elderly residents who rebuilt in Greensburg, as well as those who moved away. The results suggest that the elderly experienced a significant change in their bond to the town. Typically the elderly did not embrace going Green and focused more on retaining their memories of how the town used to be. Most significant to their development and change in place attachment were the relationships they developed and maintained with fellow community members. Overall, it was the people that made Greensburg home and a place of attachment. When many of them left for good after the tornado, the elderly’s place attachment to Greensburg was forever changed.

Master of Arts / Department of Geography / Marcellus M. Caldas / The democratization of Brazil in 1985 brought hope and impetus for agrarian reform, especially after the proposal of a series of new settlement projects by many Presidents to expropriate and redistribute lands to the Brazil’s landless. The landless poor, however, took this new state-sanctioned program into their own hands and started occupying lands to build land reform settlements. Social Movement Organizations (SMOs) that were established and working illegally gradually emerged and invaded large private landholdings near urban areas with a specific political agenda, while far rural landless people targeted unclaimed open public forest for land occupation to build spontaneous land reform settlements. Both types of land occupation actions constituted the Direct Action Land Reform (DALR). Recent literature has outlined the socio-economic circumstance that affected DALR, DALR settlement formation process and its implication to deforestation; however, no research considers forest fragmentation in these land reform settlements and its relationship with demographic factors. In order to fill this gap in the literature, this thesis first compared the temporal and spatial dynamics of deforestation fragment patterns in spontaneous DALR settlements around the municipality of Uruará along the Transamazon Highway, and in SMO-led DALR settlements in Southern Pará region using satellite imagery from 1986 to 2010 and three landscape metrics (patch mean area, area-weighted mean shape index and patch cohesion index). Metrics results were then respectively analyzed with selected field survey data to discover the impacts of demographic factors on forest fragmentation in DALR settlements. Results showed that SMO-led DALR settlements in Southern Pará primarily exhibited larger, more irregularly shaped and more physically connected deforestation fragments than spontaneous DALR settlements in the Uruará region over the whole study period. Demographic factors that influenced forest fragmentation in DALR settlements included the number of people and children per household, family lot size, percentage of families receiving credit and the distance between the family lot and the nearest city. At last, constructive policy recommendations were provided based on research findings.

Doctor of Philosophy / Department of Geography / J. M. Shawn Hutchinson / The theoretical framework of spatial microgenesis as presented by Siegel and White (1975), and updated by Montello (1998) posits that through exposure, humans will create spatial knowledge of places in their minds. This process is thought to be an ongoing one, and will eventually lead to a metrically-scaled ‘map-like’ image in the mind. In Siegel and White’s dominant framework, knowledge of space progresses through the stages of landmark and route, and ends with survey knowledge, whereas in Montello’s continuous framework, metrically-scaled survey knowledge is present from the first exposure. Beyond that primary difference between the two theoretical frameworks, the continuous framework also provides for greater nuance in how the process may occur for different individuals. There is little research directly addressing the differences between the two frameworks, and this dissertation adds support for the continuous framework by testing three of its five tenets. Utilizing a virtual environment as a laboratory, participants were exposed to a novel environment and asked to complete spatial tasks based on knowledge of the layout of said environment. Over the course of three sessions, measures of spatial knowledge were recorded using distance, direction, and sketch map tasks. The results support the first tenet of the continuous framework: metrically-scaled survey-type knowledge was found in all participants beginning with the first session. The concepts of landmark, route, and survey knowledge are still valuable though, as the results clearly showed that they help to describe the way that individuals conceptualize mental representations of space. These conceptualizations may potentially be valuable as a component of a larger spatial ontology for the American public school system. Regarding tenet two, some improvement in error rates was observed over time, but not at a statistically significant rate for all tasks, suggesting that other factors such as the study length and motivating factors may have played a role in performance. Tenet four was also supported, with significant variation in performance between participants with similar levels of exposure to the environment. Overall, this dissertation finds that the continuous framework is largely correct in its descriptions of the process of spatial microgenesis, albeit with some elements that are not fully supported by the data collected. Despite not being a good model of the process, the dominant framework remains valuable for describing how people conceptualize their spatial knowledge of environments.