Humankind has entered another lithic epoch. Concrete is the modern stone. Since taking its contemporary form nearly two centuries ago, over five hundred billion tons of the gray matter have been deposited on the earth’s crust. If this amount of concrete was used to build a sidewalk that was six feet wide and three inches thick, it could wrap around the equator over thirty-eight thousand times. The scale of production is tremendous, but only part of the story. Due to being fire-resistant, waterproof, plentiful, durable, malleable and relatively cheap, concrete has become the primary material usedto transform the possibilities of human geography. Such megalithic environmental manipulations would be impossible without the sustained mass production of cement, concrete’s essential ingredient. This dissertation explores the origins of the contemporary concrete cornucopia through an environmental history of the cement transitions that manifested it. Abundant fuel and raw materials as well as robust building regimes and demand for large-scale building on land and under water are necessary conditions for such cement transitions—defined as occurring whenever the production process and properties of cement are altered in a way that significantly changes construction possibilities. A central claim of this dissertation is that these requirements were met in southeastern Great Britain at the turn of the nineteenth century with the discovery of the cementitious properties of the natural cement stones in the London Clay at the moment of British imperial consolidation and industrial take-off. Ironically named “Roman cement,” this natural cement substitute differed from its ancient namesake that had determined the building possibilities of western Europe for roughly two millennia. The British cement production system soon spread to other industrial regions with similar raw material deposits, notably the northern United States, in a process of technology transfer that has since transformed the world. It is argued that this method of mass producing durable, quick-setting and waterproof cement with fossil fuels and its worldwide diffusion was foundational to the built environment’s divergence from the organic economy. Thus began the Second Stone Age.

The study of American national parks provides invaluable insights into American intellectual, cultural, and sociopolitical trends. As very popular tourist attractions, parks are also depicted in art, film, television, books, calendars, posters, and a multitude of other print and visual media. National parks therefore exist both physically and in the American imagination. Comparing Yosemite National Park, one of the oldest and most popular national parks, to Mineral King, California, a relatively unknown and far less-visited region in Sequoia National Park, unveils the deep complexity of the national park idea. From the mid-nineteenth to the late twentieth centuries, the visual and written representations of each area, including art, photographs, advertisements, and government publications, evolved and shifted, sometimes rapidly and paradoxically, depending upon the aims and needs of historic societies. The power of imagery and production of knowledge to influence visitation, management, and land designation is revealed through this comparative study. Park representation and interpretation in the cultural consciousness, moreover, uncovers how societies perceive and, thus, will ultimately use certain environments. A place cannot truly become a national space until it is viewed and valued as such in the American imagination. The creation of cultural material, especially visual works, is vital for forming and sustaining national park narratives. Popular parks like Yosemite need to have their legacies reinforced, and lesser-known units, such as Mineral King, deserve the chance to have a cultural legacy created—thereby helping to ensure that both remain for future generations.

ABSTRACT

Understanding complex and adaptive socio-ecological systems (SES) to deal with our most challenging and overlapping problems such as global climate change, biodiversity loss, and rising consumption rates requires sustainability theory that is commensurate with these problems’ size and complexity. The received United Nations-based sustainability framework aims to achieve a balance among three pillars—economics, environment, and social equity—for today and for future generations. Yet, despite applying this sustainability framework for over a quarter of a century, the Earth is less sustainable, not more. Theoretical trade-offs between environmental conservation and economic growth have often reinforced business-as-usual practices and educational paradigms, and emphasized economic values over ecological limits.

How can the principles of foundational naturalists help clarify, enhance, and advance sustainability discourse? I propose that the principles of Henry David Thoreau (1817-1862), Aldo Leopold (1887-1948), Rachel Carson (1907-1964), and Edward O. Wilson (1927-), express a worldview that captures and integrates a range and depth of historical, normative, economic, ecological, scientific, and social values for a viable and applicable discourse of sustainability.

This analytical study relies on (i.) textual analysis and interpretation of four key naturalists and humanists, (ii.) analysis of secondary sources that illuminate their proto- ecological and sustainability principles, and (iii.) interviews with leading sustainability scholars. Because these thinkers integrate science and ethics, natural history and philosophy, ecology and society, and environmental and economic problems within a holistic worldview, I call them systems naturalists. Their transdisciplinary worldview of one holistic system, with economics subordinated to environmental limits, links important values from the natural sciences and the humanities. The writings and examples of systems naturalists provide more robust historical sustainability principles that can help solve our most challenging SES problems by synthesizing a broad range of knowledge in the sciences, social sciences, and the humanities to inform sustainability paradigm, practices, and pedagogy.

This dissertation investigates spatial and temporal changes in land cover and plant species distributions on Cyprus in the past, present and future (1973-2070). Landsat image analysis supports inference of land cover changes following the political division of the island of Cyprus in 1974. Urban growth in Nicosia, Larnaka and Limasol, as well as increased development along the southern coastline, is clearly evident between 1973 and 2011. Forests of the Troodos and Kyrenia Ranges remain relatively stable, with transitions occurring most frequently between agricultural land covers and shrub/herbaceous land covers. Vegetation models were constructed for twenty-two plant species of Cyprus using Maxent to predict potentially suitable areas of occurrence. Modern vegetation models were constructed from presence-only data collected by field surveys conducted between 2008 and 2011. These models provide a baseline for the assessment of potential species distributions under two climate change scenarios (A1b and A2) for the years 2030, 2050, and 2070. Climate change in Cyprus is likely to influence habitat availability, particularly for high elevation species as the relatively low elevation mountain ranges and small latitudinal range prevent species from shifting to areas of suitable environmental conditions. The loss of suitable habitat for some species may allow the introduction of non-native plant species or the expansion of generalists currently excluded from these areas. Results from future projections indicate the loss of suitable areas for most species by the year 2030 under both climate regimes and all four endemic species (Cedrus brevifolia, Helianthemum obtusifolium, Pterocephalus multiflorus, and Quercus alnifolia) are predicted to lose all suitable environments as soon as 2030. As striking exceptions Prunus dulcis (almond), Ficus carica (fig), Punica granatum (pomegranate) and Olea europaea (olive), which occur as both wild varieties and orchard cultigens, will expand under both scenarios. Land cover and species distribution maps are evaluated in concert to create a more detailed interpretation of the Cypriot landscape and to discuss the potential implications of climate change for land cover and plant species distributions.

Over the last few decades, the western United States has experienced more extreme wildland fire events, remarkable for their size and severity. The frequency, intensity, and size of wildfires is projected to only increase, with severe consequences for biodiversity, ecosystem services, human property, and more broadly, the sustainability of western forests. These trends are the result of a complex suite of factors including, past land-use policies, fire suppression, climate change, and human development. To protect fire-adapted ecosystems from further damage, fuel reduction and fire reintroduction are required over large landscapes, necessitating government agencies, landowners, and other interests to work together. In response, collaborative fire restoration efforts are forming to carry out this much needed work. This research takes a multi-level approach to understanding these new models for fire management and restoration. Collaborative, landscape-level approaches to fire reintroduction are a direct response to a failure in past policies and approaches, which necessitates a discussion of why these policies allowed fires to grow worse and why management failed to effectively prevent this from happening. Thus, a historical analysis of wildland fire policy and management constitutes one layer in this analysis. Collaborative frameworks to wildland fire reintroduction are few and far between, which obliges a discussion of how collaboration works and why it may be necessary. An in-depth case study of FireScape, a collaborative effort in southeastern Arizona to restore wildfire completes this analysis and provides a discussion of the challenges, benefits, and implications of these new approaches. The context for this case study is southeastern Arizona's Sky Islands. The Sky Islands region spans the U.S. Mexico borderlands and is a biodiversity hotspot, making it an ideal place to explore the interactions between humans and natural systems. The more recent emphasis on collaboration in wildfire management has yet to be fully explored in other academic circles. Collaboration is essential in fire restoration and provides one pathway to solve complex natural resource management issues.