Climate change

The world’s path to climate change is inevitable. Activists and legislators, all around the world, are actively working to slow down this process or stop changes. Technology is moving toward a sustainable future of renewable energy and resources to lighten the impact that the human population has on the climate. Whether or not these efforts will slow down the changing climate is unknown, but the world’s scientists, engineers, and designers are preparing for any scenario that comes our way.
This thesis uses graphic design to visualize the future of humanity adapting to climate change. Topics that are explored include controlled-environment agriculture, vertical farming, sustainable food production, advancements in the medical industry, advancements in transportation, and sustainable energy production. These elements will come together, in my projects, to visualize one possible future of living in Arizona, where living conditions have become inhospitable for life as we know today.

Tropical marine macroalgae perform an essential role in coral reef function and health, however, their persistence in a rapidly changing ocean remains uncertain. The rise in sea surface temperatures and decrease in pH (ocean acidification = OA) are predicted to have damaging effects on marine calcifiers. Calcifying macroalgae have varied, often negative, responses to these conditions, however our lack of understanding about the mechanisms involved with calcification prevent us from interpreting these results fully. Thus, I conducted a series of experiments on five calcifying species, utilizing microsensors, radioisotopes, and mesocosms, in an attempt to define biotic and abiotic mechanisms involved in calcification and dissolution under OA. Microsensor work demonstrated that all species elevate the thalli surface pH 2-3X higher under OA, which promoted calcification. The use of a photosynthetic inhibitor revealed species-specific light-triggered thalli pH control that stimulated calcification, indicating strong biotic control over calcification. When exposed to OA conditions, stronger organismal control over calcification was shown to maintain calcification in the light. A major gap in our understanding of calcification under OA is whether it affects organismal capacity to form new calcium carbonate, or if dissolution occurs, reducing calcification rates. Using radioisotopes, I found that the ability to form new calcium carbonate under OA in the light was not affected in any species. This suggested that species with reduced net calcification were actually experiencing dissolution. This study also highlighted that all species were experiencing dissolution in the dark under OA. Finally, in a short-term growth experiment, I examined the combined effects of OA and increased temperature and found complex responses in species that are negatively affected by OA. This included a crustose coralline that appears to have an additive negative effect where temperature enhances the effect of OA but also a species that exhibited a negative effect which was evidently offset with increased temperature. Here, I define distinct abiotic (light, temperature, dissolution) and biotic (proton pump & photosynthesis), that are essential for understanding macroalgae persistence on future coral reefs.

Southeast Florida is a region of the U.S. that is predicted to incur severe damage due to climate change (CC). As a result, one particular grassroots organization created a CC workshop to educate, advocate, and build resiliency locally. Social movement’s literature reveals processes of framing, resource mobilization, and organizational structure that have had successful outcomes locally while climate action literature argues that civil society has been ineffective at creating significant impacts on the global scale of climate policy. In order to expand this literature further, I conducted a research project to examine how different frames presented in CC education influence climate actions in the Southeast Florida region. Using qualitative research methods of participant observations and interviews, my analysis of the data collected suggests that organizers of the workshop used an environmental and climate justice narrative along with a collective action framework, relying on three master frames of place, justice, and power to educate members on CC. Amongst the prognoses presented to members during the education were climate action solutions primarily within the meso (community/civic engagement) level to create structural change within the region. I found that participants interpreted CC to be an issue of 2 places in Southeast Florida, one on the coast and one inland and, thus, depending on which region participants lived, their level of climate action was affected, whether at the individual or community/civic level. Therefore, some participants focused on individual behavioral and household consumer tactics, while other participants worked on community building and creating structural change. Given the unsuccessful nature of local organizations at impacting global climate negotiations and the goal of social movement processes to create change within societal structures, this case study contributes to the growing body of knowledge regarding the influence of climate education on climate actions.

Climate change will expose sea turtle nests to higher temperatures and more
storms; both may negatively impact sea turtle nest success. In this study, unhatched eggs
were collected from the Boca Raton, Florida beach and developmental stage at
embryonic death determined. Elevated nest temperatures increased embryonic mortality,
and the most significant relationship was between mortality and the percent of time
embryos were exposed to temperatures above 34°C. Loggerhead turtles exhibited higher
rates of mortality compared to green turtles at temperatures above 34°C. Only loggerhead
nests were exposed to inundation, but embryonic mortality did not differ from noninundated
nests. Beach profiles across the nesting season were also determined. A major
storm altered the beach more in areas of coastal development; however, this was
impacted by a nourishment project and the presence of a structured inlet. Future management strategies may need to protect sea turtle nests from extended periods at
elevated temperatures.