RESUMENEn Europa los espacios agrarios periurbanos sufren la mayor presión urbanizadora: entre 1990 y 2000, el 77% de los nuevos suelos artificiales ocuparon áreas agrarias. Al analizar la evolución de los objetivos de la ordenación territorial en la Unión Europea, se hace patente la poca importancia que se da a los sistemas agrarios. Esto no es consecuente con el discurso ambientalista, ni se enfrenta al escenario que se avecina de crisis energética, cambio global y agotamiento de recursos. Tampoco la Política Agraria Común contribuye a preservar los espacios agrarios periurbanos, que van a jugar un importante papel en la viabilidad futura de nuestras urbes. La creación de figuras adecuadas de protección, su reconsideración en los instrumentos de ordenación y la revalorización de la actividad agraria reducirían las expectativas urbanizadoras, frenando su transformación. El análisis de distintos casos europeos ofrece interesantes lecciones sobre cómo avanzar hacia esos objetivos.Palabras clave: Espacios agrarios periurbanos, presión urbana, protección, ordenación territorial, Europa. ABSTRACTIn Europe, the periurban agrarian spaces receive the highest urban pressure: between 1990 and 2000, the 77% new artificial uses grew upon agrarian areas. Analyzing the evolving objectives of the spatial planning in the European Union, becomes evident the minor significance gived to the agrarian systems. Neither this is consequence with the environmentalist discourse; nor is facing the scenario coming with the energy crisis, the global change and the depletion resource. Neither the Common Agricultural Policy helps to preserve periurban agrarian spaces which will play an important role in the future viability of our cities. The stablishment of adequate forms of protection, their reconsideration within the planning tools and the enhancement of agricultural activity would reduce the urban expectations, slowing down their transformation. The analysis of different European cases can provide interesting lessons on how to progress towards these goals.

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Introduction: The potential of periurban agrarian ecosystems is recognized as one of the cornerstones for improving urban sustainability; however, this potential has been disregarded in spatial planning and decision making. The main goal of the PAEc-SP project was to assess the feasibility of integrating periurban agricultural areas into spatial planning by developing a viable ecosystem services-based methodology.

Cities, in recent years, have seen their functional and metabolic relationships with their agrarian hinterland being either broken off completely or substantially damaged. Within this context, Local Food Systems (LFS) can play a key role in restoring the supply relationships under regenerative assumptions. This paper analyses LFS within the Concepción Metropolitan Area (CMA) as a representative case of Metropolitan Areas in Chile. The aim of the paper is to evaluate whether LFS are regenerating sustainable rural-urban relationships, and to accomplish this goal, foodsheds have been used as a methodological tool to both characterise and represent food traceability. For this purpose, three quantitative foodshed indicators have been applied and three qualitative spatial analytical categories of the Regenerative Food Systems (RFS) defined to decode the behaviour of LFS in the CMA. The proposed method has been successful as an initial exploratory attempt to characterize the regenerative potential of RFS. The results highlight that LFS in the CMA are certainly restoring relationships between the city and its surrounding farmland by establishing new and renewed supply linkages. Further, the application of this method has shed light on some key aspects that show how an LFS is being converted into a potential RFS.

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