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Universidad de Buenos Aires (2014)

Apropiación de la naturaleza en agroecosistemas y bosques del Chaco semiárido (Santiago del Estero, Argentina)

Arístide, Pablo

Titre : Apropiación de la naturaleza en agroecosistemas y bosques del Chaco semiárido (Santiago del Estero, Argentina)

Auteur : Arístide, Pablo

Université de soutenance : Universidad de Buenos Aires

Grade : Doctor 2014

Understand the currently situation about the management of natural resources and biodiversity conservation in the Chaco Region of Argentina requires to know and understand the land use decisions and its impact on the landscape. The term "appropriation of nature" refers to the action by which humans extract elements or benefit from a service of nature to turn them a social element. The aim of this thesis was to analyze the process of articulation between society and nature in 4 rural communities in the department Figueroa, Santiago del Estero, located in areas with or without access to irrigation. For this, we identify the main historical, social, and natural factors, which structured the current socio-ecological situation. We use qualitative and quantitative data to compare communities about current forms of appropriation of nature and spatial distribution of this process. By analyzing satellite images, we evaluate this process at two scales : the community and the total study area. We describe, through Vegetation surveys, the characteristics of the environments and agroecosystems that are part of the appropriation process. The socio-ecological indicators suggest that strategies of appropriation of nature varied between local communities studied. While the four communities had diversified strategies, in three of these communities the presence of forests under community ownership provided additional ecosystem services. This strategy is characterized as "multiple use of natural resources", articulated most strongly with the ecosystem and the local landscape. In addition, local agroecosystems were characterized by small agricultural plots with edges formed by tree, shrub or herbaceous vegetation. This results in some cases in a network of hedgerows. At the landscape scale, the study area is characterized by a wide and continuous forest cover that was slightly modified during the period analyzed (1992-2011). The presence of the peasant population, which is closely linked to the local landscape as an element of production and reproduction of their livelihoods, reinforces the need to explicitly consider the spatial dimension of the appropriation of nature, to collaborate in the design of multifunctional landscapes that maintain the ability to provide these ecosystem services and maintain long-term biodiversity


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