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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Ecological understanding through transdisciplinary art and participatory biology

Ballengée, Brandon January 2015 (has links)
In this study evidence is presented that suggests transdisciplinary art practices and participatory biology programs may successfully increase public understanding of ecological phenomenon. As today’s environmental issues are often complex and large-scale, finding effective strategies that encourage public awareness and stewardship are paramount for long-term conservation of species and ecosystems. Although artists and biologists tend to stay confined to their professional boundaries, and their discourses largely remain inaccessible to larger audiences, arguments here are presented for a combined approach, which may disseminate knowledge about ecology to non-specialists through novel art-science participatory research and exhibitions. Moreover, historically several scientists utilized varied creative art forms to disseminate scientific insights to a larger populace of non-specialists, such strategies as engaging writings and visually provocative artworks may still be effective to captivate contemporary audiences. In addition such historic hybrid science-art practitioners may have laid a conceptual terrain for some of today’s transdisciplinary art and citizen science practices. Furthermore, seminal ecological artworks from the 20th Century by Joseph Beuys, Patricia Johanson and Hans Haacke utilized novel strategies to reach audiences with a message of wetland conservation, blurring boundaries between art, ecology and activism. More recently artists like Cornelia Hesse-Honegger, Helen and Newton Harrison and others have integrated biological research into their art practices, which resulted in new scientific discoveries. Through my own transdisciplinary artwork about frogs, data suggests that the visual strategies I employ were effective to increase non-specialist understanding of the ecological phenomenon of amphibian declines and deformations. In addition through my participatory biology programs, Public Bio-Art Laboratories and Eco-Actions, evidence suggests that non-specialists achieved an increased awareness of the challenges amphibians and ecosystems currently face. Likewise, that through such participatory citizen science research new scientific insights about the proximate causes for deformities in anuran amphibians at select localities in middle England and Quebec were achieved. Here laboratory and field evidence, generated with the aid of public volunteers, found that non-lethal predatory injury to tadpoles from odonate nymphs and some fishes resulted in permanent limb deformities in post-metamorphic anurans. From an environmental-education and larger conservation standpoint, these findings are very relevant as they offer novel strategies for experientially engaging non-specialist audiences while generating important insights into biological communities and wetland ecosystems.
2

Diverse Ways of Knowing in Water Quality Conservation in North Carolina

Freitag, Amy January 2013 (has links)
<p>Diverse ways of knowing have been recognized by scholars in many disciplines to contribute creative perspectives and novel problem-solving approaches. In the environmental sciences, those dependent on natural resources and working daily with those resources are in one of the best positions to observe and learn from subtle changes in the environment. In the coastal marine and estuarine environment, these experiential knowledge holders are the fishers and their families. In North Carolina, these fishers live in historic villages and, with scientists and policymakers, serve as the downstream stakeholders in watershed management. These three stakeholder groups all have perspectives to contribute to research and management of water quality in the watershed. This dissertation starts by documenting definitions and perspectives of water quality from these three stakeholder groups, establishing the base of information from which future research and management takes place. It then specifically addresses the details of negotiating co-production of knowledge through an ethnographic account of a collaborative research project investigating water pollution. The process of information sharing was highlighted during this process by a facilitated workshop asking participants to reflect upon their collective understanding of water quality more broadly and to plan a research project resulting from a new shared, understanding. The third component of my investigation of different ways of knowing uses North Carolina's Fishery Resource Grant program, which funds collaborative research between fishers and scientists, as a case study of an institution supporting co-produced knowledge about water quality and how the structure of collaboration in funded projects affects the success of the program both scientifically and socially. Together, the three chapters tell a story about the diverse forms of knowledge regarding water quality and how they might work together to better understand the causes and effects of water quality as well as tailor solutions to fit this better understanding. Though the story is of one case, specific to water quality and the coastal communities that depend on it, the story is also one of few optimistic cases in environmental science.</p> / Dissertation
3

L’infrastructure de la science citoyenne : le cas eBird

Paniagua, Alejandra 04 1900 (has links)
Cette recherche explore comment l’infrastructure et les utilisations d’eBird, l’un des plus grands projets de science citoyenne dans le monde, se développent et évoluent dans le temps et l’espace. Nous nous concentrerons sur le travail d’eBird avec deux de ses partenaires latino-américains, le Mexique et le Pérou, chacun avec un portail Web géré par des organisations locales. eBird, qui est maintenant un grand réseau mondial de partenariats, donne occasion aux citoyens du monde entier la possibilité de contribuer à la science et à la conservation d’oiseaux à partir de ses observations téléchargées en ligne. Ces observations sont gérées et gardées dans une base de données qui est unifiée, globale et accessible pour tous ceux qui s’intéressent au sujet des oiseaux et sa conservation. De même, les utilisateurs profitent des fonctionnalités de la plateforme pour organiser et visualiser leurs données et celles d’autres. L’étude est basée sur une méthodologie qualitative à partir de l’observation des plateformes Web et des entrevues semi-structurées avec les membres du Laboratoire d’ornithologie de Cornell, l’équipe eBird et les membres des organisations partenaires locales responsables d’eBird Pérou et eBird Mexique. Nous analysons eBird comme une infrastructure qui prend en considération les aspects sociaux et techniques dans son ensemble, comme un tout. Nous explorons aussi à la variété de différents types d’utilisation de la plateforme et de ses données par ses divers utilisateurs. Trois grandes thématiques ressortent : l’importance de la collaboration comme une philosophie qui sous-tend le développement d’eBird, l’élargissement des relations et connexions d’eBird à travers ses partenariats, ainsi que l’augmentation de la participation et le volume des données. Finalement, au fil du temps on a vu une évolution des données et de ses différentes utilisations, et ce qu’eBird représente comme infrastructure. / This research explores the evolution of the infrastructure and uses of eBird, one of the world’s largest citizen science projects. It concentrates on the work of eBird with two of its local partners in Latin America who manage regional portals in Mexico and Peru. eBird allows users throughout the world to contribute their observations of birds online and so to advance the case of science and conservation. These observations are stored and managed in a unified, global database that is freely accessible to all who are interested in birds and their conservation. Participants can use the platform’s various functionalities to organize and visualize their data as well as that of others. The research follows a qualitative methodology based on observation of the eBird platform and on interviews with members of the Cornell Lab of Ornithology, the eBird team and members of local organizations responsible for eBird in Peru and Mexico. We analyze eBird as an infrastructure whose technical and social sides are interrelated and need to be examined simultaneously. We also explore how the eBird team conceives the uses of the eBird platform and the data it contains. Three major themes emerge: the philosophy of collaboration underlying the development of eBird, the extension and diversification of eBird through its network of partnerships and a corresponding increase in both participation and volume of data. Finally, we also observe an evolution in the type and variety of uses for eBird observations and the eBird infrastructure itself.
4

La gestion paysagère des ravageurs : exploration des verrous et leviers d'une innovation agroécologique par la modélisation participative. / Landscape pest control : exploring determinants of an agroecological innovation through participatory modelling

Salliou, Nicolas 23 May 2017 (has links)
L’agroécologie implique la conception de systèmes agricoles intégrant autant que possible les services écosystémiques. Aux produits chimiques souvent employés contre les ravageurs de cultures peut être privilégié la régulation par leurs ennemis naturels. Des résultats en écologie indiquent que des paysages agricoles dont la composition est riche en habitats semi-naturels (bois, forets, prairies, etc) les favorisent en leur fournissant abris, sites de pontes et nourriture. Il serait donc possible de mettre en place une Gestion Paysagère des Ravageurs (GPR), c’est-à-dire de concevoir et d’aménager des paysages agricoles en faveur de ces habitats afin de favoriser les ennemis naturels et le contrôle biologique. Toutefois, l’implémentation d’une telle innovation potentielle par les acteurs de ces paysages reste largement à explorer. Dans cette thèse, dans un esprit de recherche-action, nous avons pris le parti d’explorer la conception de tels paysages régulateurs de ravageurs en s’impliquant avec des acteurs locaux et scientifiques. Nous avons initié une démarche de recherche participative avec des acteurs agricoles d’une région du Tarn-et-Garonne spécialisée dans l’arboriculture fruitière, intensive en traitements chimiques. A partir de leurs représentations et de leurs connaissances nous avons cherché à déterminer quels étaient les facteurs favorables ou non à la GPR. En particulier, nous avons qualifié les conditions dans lesquelles le paysage et les ennemis naturels étaient construit socialement par ces acteurs comme des ressources pourvoyeuses de services écosystémiques de régulation. Nous avons cherché également à identifier si ces acteurs étaient liés entre eux par des dépendances pouvant nécessiter une gestion coordonnée du paysage. Nous avons exploré la possibilité de la gestion paysagère par plusieurs cycles de modélisations participatives. La thèse a ainsi : mis à jour et qualifié la diversité des modèles mentaux des acteurs locaux sur leurs stratégies de gestion des ravageurs, co-construit des modèles Bayésien participatifs afin d’explorer via des scénarios les incertitudes autour de la question de la régulation biologique des ravageurs et, enfin, réalisé la coconstruction d’un modèle multi-agents autour de le la dynamique de population du ravageur invasif Drosophila suzukii et de sa potentielle gestion paysagère. Nous avons pu ainsi déterminer qu’en l’état actuel des représentations des acteurs, qu’ils soient scientifiques ou locaux, la composition du paysage en éléments semi-naturels leur apparaît comme faiblement reliée à un service écosystémique de régulation des ravageurs, quand bien même ce paysage est souvent favorable à la biodiversité fonctionnelle. Actuellement, faute de bénéfices agricoles clairement identifiés, les acteurs impliqués sont en conséquence peu dépendants entre eux et le besoin de se coordonner pour mettre en place une GPR est faible. La plupart des agriculteurs indiquent plutôt une nette préférence pour les solutions individuelles vis-à-vis des ravageurs, par l’utilisation de pesticides et de filets protecteurs entourant les cultures. Ce focus individuel suggère qu’innover dans l’intégration de l’activité des ennemis naturels pourrait être plus aisé au niveau de la végétation naturelle des exploitations individuelles, comme peut l’être l’inter-rang des vergers. Par ailleurs, ces résultats font apparaître le besoin d’études scientifiques liant écologie et économie qui chercheraient à mesurer explicitement les bénéfices obtenus par les acteurs agricoles par le biais de paysages favorables aux ennemis naturels. Des résultats positifs de telles études seraient mobilisateurs pour de futures recherches participatives dans ce domaine. Enfin, cette thèse participative et exploratoire nous a permis également d’identifier de nouveaux terrains et questions de recherches dans le domaine de la GPR qui pourront être poursuivis. / Agroecology requires the design of farming system integrating as much as possible ecosystem services. Biological control by natural enemies may substitute commonly used pesticides. Ecology findings demonstrate that farming landscapes with a high proportion of natural habitats (woods, forests meadows, etc) favor natural enemies by providing them shelter, nesting sites and food. Landscape Pest Control (LPC), i.e. the design of farming landscapes in favor of these habitats, may be implemented to foster natural enemies and biological pest control. However, how stakeholders may design such landscapes remains unexplored. In this PhD, we followed an action-research approach and explored the design of such pest regulating landscapes together with local and scientific stakeholders. We initiated a participatory approach with agricultural stakeholders in a part of the Tarn-et-Garonne region specialized in fruit production. Our research seeks to identify the factors in favor of a LPC according to stakeholders’ representations and knowledge. In particular, we qualified the conditions under which natural enemies and the landscape are socially constructed resources providing ecosystem services. We also seek to identify if these stakeholders were linked through dependencies which may necessitate a coordinated management of the landscape. We explored the possibility of a LPC through several cycle of participatory modelling. This PhD successively established mental models of local stakeholders about their pest control strategies, co-constructed participatory Bayesian models in order to explore uncertainties surrounding LPC, and finally we co-constructed an agent-based model about the population dynamic of the invasive pest Drosophila suzukii and its potential landscape management. Our results show that, according to scientific and local stakeholder’s actual representations, the composition of the landscape in natural habitats is weakly related with pest regulation ecosystem services, even though the landscape is related with higher functional biodiversity. Nowadays, as stakeholders see little benefit, they don’t consider to be dependent to benefit from an enhanced biological control through a LPC strategy. Farmers rather mention their preference towards individual solutions such as pesticides or exclusion nets surrounding their orchards. This individual focus suggests that designing innovation favorable to natural enemies might be more relevant within farms, like focusing on the vegetation between rows of fruit trees. Besides, these results show the need for scientific studies relating economics and ecology to explicitly measure the benefits farmers could obtain from a landscape favorable to natural enemies. Positive results of such study would enhance further participatory research around LPC strategies. Finally, this participatory and exploratory research identified new sites for investigation and raised questions about the LPC which could be further looked into.

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