| 1. |
- Elsler, Laura G.
(författare)
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The complexity of seafood trade relations across scales
- 2020
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- There is growing concern about the unprecedented rise in international seafood trade that relies on increasingly overused and climate-driven fisheries. Seafood trade relations, the multi-dimensional relations between fishers, traders, and countries for seafood exchange and other interactions, are central in the process of globalization. Despite empirical evidence of their importance, (bio-)economic models that inform fisheries management usually reduce trade relations to price dynamics. Here, I aim to understand better the role of seafood trade relations for models that guide the sustainable and equitable management of globalizing fisheries. I studied traders' collusion in Mexico (Paper I), fisher-trader relations in Indonesia (Paper II), countries trade relations in a global network study (Paper III), and fisher-market relations in a theoretical model (Paper IV). I demonstrate that seafood trade relations are affected by social-ecological change (SEC), such as climate change. Their responses, in turn, influence how other fishery actors, such as fishers, are affected. Together these interactions shape the importance of seafood trade relations to SEC. These insights suggest that seafood trade emerges from, interacts, and co-evolves with seafood trade relations across scales, which needs to be represented in management models that analyze the 'interplay of seafood trade relations with globalizing fisheries'.
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| 2. |
- Jakobsson, Simon, 1987-
(författare)
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Wooded or treeless pastures? : Linking policy, farmers' decisions and biodiversity
- 2018
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- Worldwide, biodiversity conservation is one of the key challenges for a sustainable future of nature and society. It is particularly important to preserve high quality habitats within otherwise intensively managed agricultural landscapes. Within the European Union (EU), farmers are highly dependent on agricultural subsidies through the Common Agricultural Policy (CAP), which hence have a strong influence on management and biodiversity. In European agricultural landscapes, wooded pastures form important habitats that contribute to landscape level heterogeneity and high local biodiversity, values which are often closely linked to trees. Unfortunately, many of these values were put at risk when a tree density limitation was introduced within the CAP, encouraging farmers to keep pastures open and ensuring grazing management. However, limiting tree density to a specific number to increase biodiversity finds little basis in the scientific literature. The main objective of this thesis is therefore to investigate how different measures of biodiversity across multiple taxa are affected by tree density and to study the farmers' perspective on this CAP regulation. Wooded pastures in the biosphere reserve Östra Vätterbranterna in southern Sweden were used as study sites. This thesis shows that encouraging farmers to cut trees to receive subsidies weakens the link between social and ecological values of wooded pastures, with potential subsequent losses in biodiversity. Trees were almost exclusively positive for biodiversity within this study system, increasing the species richness of plants, birds and bats. However, functional diversity across these taxa were mainly affected by other vegetation attributes within and around the pastures, such as shrub density and surrounding forest cover. A seed sowing experiment showed how trees partly shape plant communities already at the germination stage. Further, responses of functional diversity was mainly driven by resource use related traits among plants and birds, whereas bat functional diversity responses were mainly determined by their ability to manoeuvre through the micro-habitats of wooded pastures. Based on this thesis, I conclude that the tree density limit proposed by the EU has failed to capture the unique biological values of continuously managed wooded pastures and that the social-ecological links between policy, management and biodiversity are threatened by number specific governance of nature. It is therefore promising that the EU in November 2017 announced to open up for excluding the tree density focus in the CAP. Further development of the CAP can benefit from the findings of this thesis, revealing important knowledge gaps on biodiversity patterns in relation to trees in pastures.
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| 3. |
- Larsson, Simon A., 1990-
(författare)
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Ashes to ashes : Applications of tephrochronology in Scandinavia
- 2022
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- The project presented in this thesis provides two examples of applications of tephrochronology in Scandinavia. The usage of tephra deposits preserved in sediments—i.e. horizons of volcanic ashes, detected either as visible layers or as low-concentration “cryptotephras”—is demonstrated to be a strong and versatile tool for chronological control of individual sediment sequences and for correlation between study sites on both local and wider-regional scales.Fieldwork was done at a number of study sites in southernmost Sweden and mid-Norway to sample sediments formed in lakes and peatlands during the Last Glacial–Interglacial Transition, i.e. c. 16,000–8,000 years ago. Labwork was then performed to analyse the sediments by methods to estimate organic matter, organic and carbonate carbon, and elemental contents as well as to find datable macrofossils and to detect tephra occurrences. Among the detected tephras between the different study sites, identifications were made of the Fosen Tephra, the Hässeldalen Tephra, the Vedde Ash, and the Laacher See Tephra. These were used for the purposes of either application in the project; (1) a palaeoclimate reconstruction at Körslättamossen, with new proxy analyses and correlations to a previous study of the same site as well as to other studies in Europe via linkages established by the tephras, and (2) a palaeoglaciological reconstruction on the Fosen peninsula, based on correlations between study sites using the detected tephras to assess the timing of glacial retreat in the area.The palaeoclimate reconstruction at Körslättamossen and correlation to previous studies provides new information about the climatic development in Europe after the end of the last ice age, specifically regarding the timing of the cold stage known as the Younger Dryas. Detailed knowledge of such events, spatially and temporally, is necessary to understand the behaviour of the climate system in the past and, thereby, its behaviour in the present and the future. This is one of several studies demonstrating the usefulness of tephrochronology for such research questions.The palaeoglaciological reconstruction on the Fosen peninsula, also relating to the Younger Dryas, is one of a few recent studies which demonstrate the strengths of tephra investigations in providing evidence for the timing of events on more local scales than the wider spatial perspective more often utilised in tephrochronological applications. Other than resulting in a significantly revised chronology for the retreat of the Scandinavian Ice Sheet in the study area, this study should also encourage new, similar tephra studies in future Quaternary research.In addition to the direct results of either study (mainly presented in the related scientific papers) and the addition of new reference data for later tephra studies, the thesis also discusses further implications of the results and observations made with emphasis on considerations and study design issues in Quaternary research at large and for the tephrochronologist in particular.
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| 4. |
- Poelzer, Gregory A
(författare)
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Extracting Legitimacy : Input, Throughput, and Output Legitimacy in the Mining Industry
- 2018
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- Legitimacy affects questions on constitutional design, international political regimes, and specific policy sectors. Although it permeates society at various levels, legitimacy becomes particularly crucial when decisions hold long-term or permanent consequences. In democratic societies, decisions on electoral reform or constitutional amendments typically include various checks and balances to increase the legitimacy of the outcome and similarly, on a smaller scale, resource development also undergoes of series of checks and balances to improve legitimacy. I investigate one such resource development, mineral extraction, to look at key factors of input, throughput, and output legitimacy in a policy sector with long-term or permanent outcomes.If the strength of the input legitimacy (democratic, participatory quality) is high, then a deficit of output legitimacy (decisions, outcomes) can be overlooked –and vice-versa. This interpretation of legitimacy focuses on the decision-making process and the outcomes, but with the active role companies take in mining operations it becomes critical to consider the non-state actors involved in the process. To address this additional piece of this equation, throughput legitimacy is utilized to analyze the effect of relationships in policy decisions. By looking at the quality of interaction, this thesis investigates where throughput fits within the three dimensions of legitimacy in the mining sector.Using interview and survey data from Sweden and Canada, this research in this thesis addresses both theoretical and empirical issues. Theoretically, the effect of multiple actors on the policy process legitimacy of policy processes are explored. Using the input, throughput, and output legitimacy trichotomy provides a basis through which to investigate the changes engendered by different governance arrangements and their effect on legitimacy. When support for policy also depends on activity outside the formal processes of government, the implications for legitimacy change –creating a new theoretical criterion. Empirically, the qualities and factors that affect the legitimacy of a process are identified. The findings of this thesis provide insight on future process designs; understanding the relationship between participation, interaction, and outcomes inresource development processes and the factors critical to legitimacy emerges and endures.
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