Sustainability Studies

Heated leaf extracts of Euphorbia neriifolia (sweet aloes) are used traditionally in Guyana for asthma therapy, but the phytoconstituents have not been studied and phytohormones are generally unexplored in Euphorbia species. Phytoconstituents in asthma-effective traditional heated extracts were analyzed and compared with unheated leaves and latex extracts as screens to identify candidate compounds for asthma treatment. Analysis employed untargeted and targeted mass spectrometry-based metabolomics. The untargeted approach revealed thousands of features in samples with higher abundance in heated extracts and confirmation of 33 metabolite identities (confidence levels 2 and 3) which are known to have antioxidant and anti-inflammatory properties. Highly accumulated and unique features were detected in latex, and those characteristic compounds may reflect the expanded therapeutic uses of E. neriifolia globally. A targeted metabolomic analysis identified and quantified several cytokinins, including aromatic kinetin, and acidic phytohormones. Traditional heating improved the content of several cytokinins with known therapeutic potential, indicating they may be candidates for asthma management.

Author Keywords: asthma, cytokinins, Euphorbia neriifolia, metabolomics, sweet aloes, traditional remedies

Ecological restoration of grassland ecosystems is increasing in scope in Ontario, as a result the demand for genetically appropriate, high-quality seeds of native plants is also increasing. This mixed methods study characterized fitness and seed quality traits using genetic, demographic and growth trial data for a keystone tallgrass prairie species Big bluestem (Andropogon gerardii). To estimate the ploidy levels in Big bluestem, our flow cytometric results indicated an average of 6.32 picograms of nuclear DNA within sixteen populations surveyed showing that hexaploid (6x) cytotypes are dominant in Southern and Central Ontario populations, aside from one 9x occurrence in Norfolk county, ON. Seed quality, measured through germination and viability testing did not change based on whether a population was remnant or restored. Concerningly, our study shows that remnant populations of Big bluestem are at risk of being lost as high quality seed sources likely because of the absence of stewardship and the resulting loss in population fitness. Workshops with prairie restoration practitioners suggest that there is significant vision behind the future of this work in the province, and that an ecosystem wide seed strategy for keystone tallgrass prairie species is a necessary next step to increase the sustainability of seed-based restoration strategies and preserve remnant site genetics.

Author Keywords: Big bluestem (Andropogon gerardii), Ecological Restoration, fitness, polyploidy, practitioner, seed quality

The seed oil of Carapa guianensis, known as Crabwood oil (CWO) and its fractionation was studied, focussing on chemical composition and physicochemical functionality. Compounds never reported before in CWO were identified, including limonoids such as Trichillin, ketostearic and hydroxyoleic acids. Yield of olein and stearin fractions correlated strongly with solvent polarity. Important bioactives were partitioned as a function of solvent polarity in the olein vs. stearin fractions. For example, up to 35% more of Gedunin were present in the liquid fractions. Solid fat content, crystallization and melting temperature and microstructure were significantly affected by fractionation and shown to be strongly correlated with solvent polarity. Fractionation was demonstrated to be a powerful tool to extend the physical functionality of CWO and concentrate its bioactives.

Author Keywords: Carapa guianensis, Chemical characteristics, Crabwood Oil, Dry and Solvent fractionation, Fractionation, Physical characteristics

Local environmental initiatives can create visible and essential changes and inspire greater environmental action. Municipal governments and local environmental non-governmental organizations (ENGOs) are important local actors, but their partnerships and relationships have not received much attention. This thesis examines what activities and relationships have been developed between municipal governments and ENGOs in the Peterborough region, what benefits they gain and what challenges they face during collaboration, and how these partnerships affect public perceptions of the organizations. I conducted 14 interviews with members of local ENGOs and municipalities and received 52 survey responses from residents. The findings indicate groups have unique relationships for planning, programming, and advocacy activities. Relationships were key and challenges included lack of time and prioritization, communication, and public buy-in. Partnerships provide an opportunity to share positive accomplishments and build reputation. This study sheds light on the complex relationships among local organizations and provides recommendations for improving partnerships.

Author Keywords: Community Engagement, Environmental Non-Governmental Organizations, Local Sustainability, Municipal Government, Partnerships, Relationships

This study used literature from the social and ecological sciences to look at the practice of seed saving in the Global North for adaptation in the face of climate change. The hypothesis is that small-scale gardeners and farmers are adapting seeds to the changing climate as they grow them, which is not the case for growers who grow only food. However seed savers face obstacles and are dwindling in number – even though the practice is thousands of years old. Using survey and interviews of seed savers in two communities in Ontario Canada (one Indigenous and one settler), this mixed methods Participatory Action Research project explores the challenges and opportunities for seed saving in the context of climate change. The results indicate that both seed savers and their crops are adapting to climate change, but that the challenges and implications diverge for Indigenous vs settler communities. A framework of recommendations to advance seed saving in a beneficial, decolonizing way is proposed.

Author Keywords: climate change, Food security, food sovereignty, Seed Keeping, Seed Saving, Sustainable Food Systems

This research aimed to capture the experiences of cities that have endeavored to localize the SDGs in their areas. Literature review and one-on-one interviews with SDG practitioners have been conducted to glean best practices and effective strategies to develop recommendations for how cities in Canada should plan to localize the SDGs in their areas. The research uncovered themes in relation to building on existing initiatives, stakeholder management, data management, and the role of personal rapport and connections in professional settings. This research also revealed an important tension between the top-down approach of adopting a unified federally devised framework and a bottom-up community indicator approach. Finally, the research uncovered opportunities to increase support for local organizations and city governments embarking on localizing the SDGs through engagement with academia and partnering with faculty and graduate students at the local university to incorporate graduate research into SDG localization efforts and tap into funding opportunities. The research also resulted in a flow chart that is gleaned from interviews and the literature review to describe a step-by-step process that cities and communities could deploy to localize SDG targets and indicators.

Author Keywords: Indicators, Localization, Measurement, Strategies, Sustainable Development Goals, Voluntary Local Review

The widespread adoption of electric vehicles (EVs) is crucial for reducing transportation-related emissions and achieving sustainability goals. However, a significant research gap exists regarding specific consumer groups, such as university students, and their attitudes toward EV adoption, as they represent a demographic influential in shaping future adoption patterns. This research uses a quantitative approach to explore Trent University students' attitudes and perceptions toward EV adoption.A survey of 154 students examined the factors influencing their willingness to adopt EVs. Various quantitative data analyses, including cross-tabulation tables and chi-square tests, were employed to investigate the relationships between socio-demographic, social, environmental, and economic factors and students' willingness to adopt EVs. The findings indicate that while socio-demographic factors do not significantly influence willingness to adopt EVs, factors such as first-hand experience, knowledge about EVs, social influence, upfront costs, charging infrastructure, and government incentives significantly impact students' willingness to adopt EVs. The study revealed that although students recognize the benefits of electric vehicles (EVs), such as reduced emissions, lower operating costs, enhanced energy efficiency and health advantages, key barriers to student EV adoption include high upfront costs, limited charging infrastructure, concerns about driving range and charging time, and a need for more knowledge and awareness. The findings of this study fill a significant research gap and add to the existing literature on EV adoption. The insights generated can inform targeted strategies by policymakers, educational institutions, and EV manufacturers to promote widespread EV adoption among students. Keywords: Electric Vehicles, Internal Combustion Engine Vehicles, Zero-emission vehicles, sustainable transportation, attitudes, perceptions, University students, consumer behaviour.

Author Keywords: Consumer behaviour, Electric Vehicles, Internal Combustion Engine Vehicles, sustainable transportation, University students, Zero-emission vehicles

The bringing together of Indigenous (IK) and Environmental science Knowledge (ESK) has garnered significant attention in environmental research. This intersection has been recognized for enhancing understanding of various contemporary environmental challenges. Despite its acknowledged importance, there remains a notable gap in understanding how these knowledge systems are brought together, specifically at the level of data analysis, presentation, and interpretation of results. Furthermore, even less is known regarding the appropriate and effective use of any one approach and method in its application. Therefore, this thesis was guided by the question, 'What approaches and methods have been used previously to bring together Indigenous and Environmental science Knowledge in environmental research, and what are the challenges and limitations of any one approach and method in practical application?' This question is investigated through the conduct of a systematic map and application of a case study scenario. A search protocol was developed and served as a guide for the conduct of a systematic map. This protocol detailed how articles focused on bringing together IK and ESK would be systematically gathered and analyzed (Chapter 2). The resulting systematic evidence base highlighted four main approaches used in the peer-reviewed literature to bring together IK and ESK, namely: (1) a narrative approach to mixing; (2) the use of statistical analysis; (3) use spatial overlap in GIS; and (4) mixing IK and ESK using illustrative figures (Chapter 3). In order to gain a more in-depth understanding of the identified approaches and methods, their use was explored through the application of a case study scenario on environmental factors influencing Arctic Char (Salvelinus alpinus) growth in the Inuvialuit Settlement Region (Chapter 4). Although more data collection and analysis is needed to understand the relationship between environmental variables on Arctic Char growth in lakes surrounding Ulukhaktok, the attempt to link Indigenous Knowledge of lake ice change with Environmental science Knowledge on landlocked Arctic Char growth, coupled with insights informed from a review of relevant literature, led to the development of criteria that may be used in future research to test the identified approaches and methods. This thesis makes contributions to the academic literature by documenting and examining the types of approaches used to bring together IK and ESK at the level of data analysis, offering insights into the complex and evolving landscape of linking IK and ESK in environmental research.

Author Keywords: Arctic, Arctic Char, Environmental research, Environmental science Knowledge, Indigenous Knowledge, Knowledge linking

Institutional claims of university-community engagement in support of the public good and planning for teaching, learning, and research have largely remained in the realm of rhetoric. This thesis analyzes the 2019-2021 Trent University Lands and Nature Areas Plan and public consultation process, which at times was marked by the complete absence of consultation and at other times, wholly inadequate consultation with regards to developments affecting its on-campus food growing system and correlate pedagogy. Using methods from Institutional Ethnography, Participatory Action Learning and Action Research, and the BIAS FREE Framework, I explore how Trent University manages its approach to land-use planning and public consultation, revealing that it is ultimately working at cross-purposes with its foundational principles. I advise that Trent University's current land-use planning model, lacking critical examination and intervention, puts the institution's academic reputation, campus ecological functions, and university-community relations at risk. If perpetuated, this model will be detrimental to the university's capacity to generate new knowledge for teaching, learning, and research, as well as context-specific solutions for its land-use planning. My findings define a new concept of fait accompli planning to describe how and why Trent's public consultation process fell significantly short of both its institutional mandate and claims of robust and comprehensive engagement. I conclude that post-secondary institutions (and beyond) need to implement dialogic approaches to planning that abandon predetermined outcomes and instead foster genuine dialogue toward a collaborative milieu of shared, informed, and deliberate planning practices.

Author Keywords: consultation, fait accompli planning, higher education, land-use planning, organizational behaviour, university-community engagement

The study examines the adaptive reuse of historical and heritage industrial sites in Peterborough, Ontario. Industrial-heritage sites face several challenges when being subjected to adaptive reuse. These challenges are largely concerned with the contamination of sites and how industrial buildings and sites can be transformed into reusable sites. The study adopted a qualitative research design and analysis. The study addressed the research gap about nature of adaptive reuse of historic and heritage sites in Peterborough. The study primarily focused on the challenges, best practices, stakeholder initiatives, and the nature of structures in contexts of adaptive reuse in Peterborough. Based on the findings of the study, COVID-19, political will, contamination and the design of heritage and industrial buildings or sites pose a challenge to implementing adaptive reuse practices. These findings provide evidence for policymakers and decision makers on how to apply best practices to adaptive reuse and cultural heritage.

Author Keywords: Adaptive reuse, Cultural, Heritage, Historical, Industrial, Structures