Change has become a ubiquitous force in a highly globalized and interconnected world. Coastal systems are being restructured by overfishing, globalization, climate change and other factors. Further, social and ecological changes in coastal systems interact across spatial and temporal scales creating challenges that are complex, nonlinear and often difficult to predict. These new challenges have the potential to push social-ecological systems past their experienced range of variability and thus have immense consequences for the both the health of marine ecosystems and the livelihoods of hundreds of millions of people who depend on marine resources for their survival. Addressing these challenges will require collaborative efforts informed by site-specific research on the dynamics of social-ecological systems.
Ultimately, this dissertation aims to contribute to efforts towards social-ecological system sustainability. Specifically, the purpose of the research is to improve our understanding of how small-scale fishers in Mozambique have adapted over time to cope with a particular set of challenges and how likely fishers are to cope effectively with future changes in their complex social-ecological systems. The dissertation is organized around four research chapters, each of which addresses a specific research objective.
Detailed knowledge of historical social-ecological conditions is a critical entry point for understanding small-scale fisheries systems. While fisheries landings data are often the primary source for historical reconstructions of fisheries, reliance on data of a single type and/or from a single-scale can lead to incomplete or misleading conclusions. Moreover, in the case of many small-scale fisheries landings statistics are often incomplete and/or inaccurate. Therefore, Chapter 2 combines data from multiple sources and scales to reconstruct historical social-ecological system dynamics along the Mozambican coast. At the national scale, my analysis points towards trends of fishing intensification and decline in targeted species, and highlights the significant impact of small-scale fisheries on marine stocks. At the local scale, fishers are experiencing changes in fish abundance and distribution, as well as in their physical, social and cultural environments and have responded by increasing their fishing effort.
In the context of multiple drivers of change, it has become increasingly important to identify how communities are responding to livelihood stressors. In Chapter 3, I examine how fishers are adapting to social-ecological change, and identify factors that facilitate adaptation and factors that inhibit adaptation. Primarily, fishers are adapting through intensifying their fishing efforts or by diversifying their livelihoods. Adaptation is facilitated by fishers’ groups, occupational pride and family networks. It is inhibited by limited assets, adaptive actions with negative social and ecological impacts, competition over declining resources and pervasive poverty. My data suggest that it is not the poorest fishers who are least able to adapt to change, but fishers who are locked into a declining fishery. I argue that adaptations are spatially and social differentiated and place-specific. Therefore, future adaptation initiatives aimed at strengthening the capacity of threatened communities to respond to livelihood stressors need to explicitly consider this complexity.
Millions of people around the world depend on shrimp aquaculture for their income and livelihood. Yet, the phenomenal growth of shrimp aquaculture during the last two decades has given rise to considerable environmental damage and social disruption at the local level. In Chapter 4, I analyze the impacts of employment at an export-oriented shrimp farm in central Mozambique on livelihood vulnerability of farm and non-farm employees. My data indicate that shrimp farm employees are less vulnerable to chronic stressors, such a pervasive poverty, than non-farm employees, but more vulnerable to acute shocks, such as the White Spot Syndrome Virus (WSSV), associated with shrimp production than non-farm employees. I argue that future vulnerability research will need to account for this duality as aquaculture development spreads along the Western Indian Ocean.
In response to the speed and magnitude of contemporary change, understanding how much disturbance communities will absorb, where social thresholds lie and what coastal community systems might look like after a threshold is crossed are critical research questions. Chapter 5 evaluates the resilience of two fishing communities in central Mozambique and forecasts the outcome of moving past socially defined thresholds. My results indicate that coastal communities are continuously absorbing multiple sources of disturbance without shifting into different states. However, a 90% decline in catch rates would represent a threshold for both communities. At Zalala Beach, fishers would respond by permanently moving to another location whereas in Inhangome, fishers would respond by changing their professions. These results contribute to our understanding of social resilience.
Deliberate progress towards the goal of long-term sustainability depends on understanding the dynamics of social-ecological systems. Therefore, this dissertation aims to contribute to a growing body of theory and empirical evidence on how fishers negotiate livelihoods under conditions of rapid change and increasing vulnerability. The dissertation concludes by summarizing seven key research findings and by discussion some of the theoretical, methodological and policy contributions of my research to the literature. / Graduate / 0366
| Identifer | oai:union.ndltd.org:uvic.ca/oai:dspace.library.uvic.ca:1828/4860 |
| Date | 29 August 2013 |
| Creators | Blythe, Jessica |
| Contributors | Flaherty, Mark S., Murray, Grant |
| Source Sets | University of Victoria |
| Language | English, English |
| Detected Language | English |
| Type | Thesis |
| Rights | Available to the World Wide Web |
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