School of Agriculture, Food and Ecosystem Sciences - Theses
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ItemThe Logic of Innovation: How Institutional Logics Shape Innovation in Australian Agriculture( 2023-12)This research aimed to improve how institutional dimensions of innovation in agriculture are described and enhance the understanding of their impact on innovation. By exploring systems perspectives on innovation within industrial and agricultural contexts, I explain how institutions are predominantly defined as functional and structural elements of innovation systems (IS). This demonstrates how innovation has been rendered technical in agriculture, and I argue for an institutional turn to rebalance IS towards the social and political. By applying a new institutionalist lens, I expand on the current view of institutions to define them as socially constructed, recursive, material, symbolic and political. I use this expanded definition to highlight the lack of approaches for institutional analysis in agricultural innovation systems (AIS) and introduce the institutional logics (IL) perspective as a basis for my research design. This research is a case study of the influence IL have on managing nutrient pollution in agriculture. It draws data from two contexts that have grappled with this issue for decades, namely the Australian sugarcane industry and agriculture in the Netherlands. My analysis centred on the discourse surrounding each context, drawing on data from unstructured interviews with 22 innovation actors, 119 submissions to an Australian senate inquiry, and 59 documents. Interviews covered actors in the policy, program management, intermediary and farming practices, while documents included those addressing the cases technical, policy and strategy dimensions. My analytical framework draws on the foundational elements of IL and seeks to describe the interrelationship between problem framing, chosen theories of action and justifications used to legitimise action. This was used to develop an initial position on IL observed in the case. I then used qualitative content analysis of data from two discursive hotspots to explore how IL impact innovation activity and performance. Through this process, I describe a dominant discourse within the Australian context anchored in what I label a scientific logic. While this logic dominates the discourse, another competing logic drives an alternate discourse. This I label the experiential logic, which is characterised by a contrasting relativism that questions every aspect of the scientific logic. This resulted in a polarised problem domain leading to diminished action to address the problem and limited progress towards nutrient pollution targets. In the Netherlands, the discourse revealed a dominant societal logic that frames the problem legally and justifies action on the grounds of human and ecosystem health. This precipitates an instrumental theory of action that continually layers expectations for actors in agriculture around compliance with various standards and limits. Sitting behind this instrumental facade was a social process built over centuries and focused on a pragmatic approach to building consensus. This resulted in a fusion of the instrumental approach to defining what must change with a social process of settling on how to achieve this. The polarisation observed in the Australian case was absent in the Netherlands; however, questions exist as to whether the consensus based approach to decision making can withstand the various social, political and functional pressures facing Dutch society. Synthesis of my findings showed how limited awareness of institutional processes, epistemological divergence and weak legal frameworks contribute to poor innovation performance in the Australian context. These insights demonstrate a divergence from the dominant technical and economic interpretations of innovation performance in agriculture and challenge the functional and structural black box approach to representing institutions within AIS. This has implications for the relative emphasis placed upon institutional analysis within AIS. Subsequently, this highlights the need for innovation actors to engage with the institutional dimensions of innovation if progress is to be made in complex problem domains. I propose an enhanced role for innovation brokers to facilitate this process and a representation of AIS that better captures this institutional turn.
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ItemMapping for Sustainable Livelihoods: using cultural mapping to clarify community shared visions and livelihood options in natural and cultural resource planning and development( 2023-04)Abstract The development of sustainable livelihoods and sustainable growth is a key challenge for society. While there is often the best of intent, many opportunities for sustainable development are not realised. The goal of this research was to understand the reasons for overlooked or lost opportunities for sustainable livelihoods and sustainable growth. The research was undertaken in the Kimberley region, a contested landscape in the north of Western Australia. This region includes a diverse range of industry, government and community stakeholders, all with vested interests in its natural and cultural resources. The region is rich in resources, and Indigenous people’s intergenerational knowledge of the area is keenly sought after from sectors such as tourism, mining, national parks, education, health and environment. However, despite the amount of private investment and government funding for development that is poured into the area, it results in little change for its at-risk Indigenous communities of the Kimberley despite the constant demand from academic, industry and government sectors to engage with them and address their needs. The intent was to learn their perspectives about the constraints when engaging with communities and to identify opportunities for improving interactions and more sustainable outcomes for all parties. The study explored research questions related to this goal using personal ethnography, interviews, a workshop and tailored cultural mapping practice, and engaged with a large range of sector leaders. Another focus was to explore an approach to sharing of knowledge between Indigenous communities and the many stakeholders they engage with, and the benefits that might come from this. A bespoke designed method of cultural mapping was refined and accredited and used as a research framework. Bespoke is when a training method is designed to address a real-world issue or concern. This method was used to design the research questions and a workshop involving interviewees. This method was also used to develop multi sector engagement scenarios that make sustainable livelihoods, and the constraints to achieving them, more visible. The study found livelihood and growth opportunities were missed because: 1. cultural knowledge was not specifically recognised to be of value in sustainable development; 2. time poor community leaders cannot fully evaluate potential opportunities arising from the huge amount of investment; 3. Kimberley Indigenous communities do not feel heard or included in culturally appropriate ways in the large-scale development being implemented by others; and 4. knowledge collected from communities rarely had any benefits for the communities, yet that knowledge benefited those collecting it. Further, the study found that development proponents from the public and private sectors predominantly work in silos. The consequence for communities is the effort expected when each stakeholder knocks on their door to ‘consult’ or gather information. This commitment takes time and effort that communities could invest into their own initiatives. More broadly, these findings indicate that community livelihood opportunities are not being realised because culture, and its complexity, are being ignored, which points to the need for including culture in a more practical and realistic way into the existing sustainable development paradigms. Culture remains ambiguous in these paradigms, indicating the lack of clarity that underpins efforts to incorporate it. As a result of this disconnection, decision makers and investors fail to acknowledge the urgency of reversing the loss of cultural knowledge. This knowledge is potentially critical to addressing major challenges such as climate change, language loss, and loss of biodiversity. These findings, and findings of prior studies underpinning this one, show that for communities to have the chance to achieve sustainable livelihoods, their single most important cultural asset, their practices and knowledge of their region and its natural environments, must be protected and acknowledged. These findings have wider implications for achieving sustainable livelihood and development objectives in Indigenous communities across Australia and in many other communities around the world. It is recommended that ‘culture’ be incorporated as the first pillar of the sustainable development paradigm, and become a standalone Sustainable Development Goal
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ItemClimate and climate change effects on carbon uptake and storage in Australia’s wooded ecosystems( 2022)Forest ecosystems are central to the land carbon sector due to their capacity to store and sequester carbon. Many studies have demonstrated that forest carbon uptake and storage is strongly dependent upon climatic conditions. However, the effects of climate on forest carbon uptake and storage in different biomes are still uncertain. Climate change may alter carbon dynamics within forest ecosystems through the direct effects of increased temperature, increased CO2 concentration and changing precipitation regimes. Yet forests may also adjust to changing climate through mechanisms such as thermal acclimation. In this thesis I used three modelling approaches (machine learning, boundary-line analysis, and a land-surface model) to examine how climate of the recent past, present, and future affect carbon uptake (as Gross Primary Productivity, GPP) and storage (as above-ground biomass, AGB) in Australian forests. Furthermore, I explored how current GPP adjusted to thermal regimes and how acclimation affected carbon uptake and storage in the future. In my first quantitative chapter (Chapter 2), I explored relationships between carbon storage (as AGB) with climate and soil in Australian forests across the continent. I developed RandomForest models with climate-only, soil-only, or climate plus soil variables to examine whether climate or soils are better predictors of forest biomass at the continental scale and to identify the most important predictor variables. In this chapter I demonstrated that climate (particularly temperature and the timing of precipitation) was more important than soil for explaining variation in AGB across Australia’s forests. In Chapter 3, I used boundary-line analysis to examine the ecosystem temperature response of carbon uptake (as GPP) in 17 wooded ecosystems representing five distinct ecoregions. These responses were represented as a convex parabolic curve that was similar in shape among ecoregions – narrow in tropical forests and broader in woodlands. I then derived the thermal optima of GPP (Topt) from these curves for each ecosystem and examined the relationship between Topt and mean air temperatures across sites. My analysis revealed a strong positive linear relationship between Topt and mean air temperature that indicated GPP was optimised to the present climate. Finally, in Chapter 4, I predicted how carbon uptake and storage will be affected by climate change in these 17 ecosystems and examined the effects of thermal acclimation of photosynthesis on these predictions. I used the CABLE-POP land surface model adapted with thermal acclimation of photosynthetic functions and forced with climate projections from the extreme climate scenario RCP8.5. My simulations indicated that increased temperature, CO2 concentration and changed precipitation patterns will have a positive effect on future carbon uptake and storage in the majority of the 17 ecosystems. Furthermore, thermal acclimation of photosynthesis is likely to enhance this effect in tropical ecosystems. My results confirm that carbon uptake and storage in Australian forests are fundamentally linked to temperature and precipitation regimes, and that these forests may be capable of adjusting to climatic conditions. My research indicates that the direct effects of climate change are likely to enhance the storage and sink capacity of Australia’s forests in the future. While I did not assess the indirect effects of climate change on carbon cycles through changes to disturbance regimes, overall, my thesis suggests that carbon uptake and above-ground biomass carbon stores in Australia’s forests are likely to be resilient to climate change.
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ItemMaking the connection between history, agricultural diversity and place: the story of Victorian apples( 2016)Apple growing practices are embedded in a productivist mentality aiming for ever higher efficiency and productivity. And while the climate change impacts are to a large extent known, there is little attention given to the coupling of the social and the ecological effects. I use apple growing as a case study to explore the relationship between place, biodiversity and rural change in Victoria. My research is based on historical research; including an analysis of the Museum Victoria’s collection of wax apple models, and in-depth interviews with orchardists. By drawing on environmental history, social-ecological systems thinking and Bourdieu's theory of practice, I highlight the importance of a systems perspective and inform it by emphasis on the critical role of underlying power structures and individual dispositions, or the habitus, of the growers. These dispositions have been shaped and internalised by the growers’ histories and their physical surroundings. Orchardists have been able to respond to intensifying production requirements by utilizing technologies and scientific nous to keep up with the continuous aim for efficiency. Growers are caught up in a self-reinforcing cycle of satisfying the demand for perfect apples by adopting expensive techno-scientific approaches to enable ever more intensive production. The symbolic violence and amplified biophysical pressure orchardists experience has driven many to despair; resulting in a significant decline in small scale apple growing businesses over the last decade. I offer some suggestions for government policy and support measures and argue that any services or support programs need to be tailored to the appropriate level and need of each orchard business and the individuals who are involved. My analysis shows that those growers, who engage more closely with their biophysical place as well as their history and identity as apple growers in that place are (re-)creating another version of what it means to be an apple grower. In some cases this is resulting in resistance to the vortex of agricultural productivism that has been the basis of their existence for many generations.
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ItemLimits to recruitment of a rare conifer: Wollemia nobilis( 2016)Wollemia nobilis (Wollemi pine, Araucariaceae) is an Australian conifer and one of the world’s rarest trees, with a known population of 83 mature trees and 200-300 seedlings in the wild. Wollemia nobilis is a high-profile threatened species because of its discovery near a major capital city (Sydney) in 1994. My research began with the observation that the W. nobilis population had few individuals between the seedling and canopy tree size classes (i.e., between 2-20 m in height), and questions about potential recruitment limitation in W. nobilis. I found that inter-annual variation in seed production, estimated from photographs of W. nobilis mature tree canopies, was not likely to limit the recruitment of new seedlings (Chapter 2). Through monitoring W. nobilis seedlings in the wild (Chapter 3), I observed that new seedlings germinated each year, but most of these seedlings died soon after germination (65% of seedlings lived less than one year) and (44% of established juveniles survived the entire 16-year monitoring period). However, for the remaining seedlings, survival rates were much higher, although growth rates remained low. Shade-tolerant trees, such as W. nobilis, commonly need increased light to grow rapidly. Tree rings from established W. nobilis suggested rapid growth from early establishment and greenhouse studies showed W. nobilis increased growth with increased light. It is likely that canopy gap creation is required for increased growth of W. nobilis seedlings in the wild. Fire and drought are key threats to the survival of established W. nobilis seedlings. Through ex situ burning experiments I found that W. nobilis could resprout after fire, providing further evidence to challenge to the historical idea that all rainforests are fire sensitive (Chapter 4). Alternatively, W. nobilis was intolerant of prolonged drought, compared with other species from the Araucariaceae family (Chapter 5). To extend my knowledge of W. nobilis recruitment, I then set about establishing a new W. nobilis population (Chapter 6). I planted 191 W. nobilis into a new site, similar to the wild site, but with a greater range of light availabilities. Two years after planting I found that survival, but not growth, was improved at higher light sites. Monitoring is ongoing. The life history of W. nobilis (particularly slow growth) in conjunction with its environment (deeply shaded rainforest) results in infrequent recruitment – similar to many threatened conifers. Wollemia nobilis differs from most threatened conifers in that it is not affected by human and land-use change threats, such as timber harvesting. However, humans can play a role in the protection and recovery of W. nobilis, such as through the active establishment of new W. nobilis populations in the wild. Beyond its scientific value as a relict population, the high profile of W. nobilis and its potential to raise awareness of biodiversity issues provide further impetus for maintaining W. nobilis population persistence in the wild.