Erupciones hidromagmáticas en el volcanismo cuaternario de Olot (Girona)

10 páginas, 9 figuras, 1 tabla.[ES] En el presente trabajo se pone de manifiesto la importancia del volcanismo explosivo en el marco del volcanismo cuaternario de Girona, especialmente en la zona de Olot donde se concentran los episodios más recientes. Se han reconocido catorce edificios volcánicos que presentan alguna fase explosiva freatomagmática o freática durante su evolución. La actividad hidromagmática da lugar a una amplia diversidad de depósitos piroclásticos, cuyo estudio ha permitido distinguir varias secuencias eruptivas entre estos volcanes. Las diferencias en el comportamiento explosivo de unos volcanes a otros son debidas fundamentalmente a las distintas formas de interacción agua/magma en cada volcán, las cuales están determinadas por la estructura geológica de los últimos centenares de metros de la corteza y, especialmente, por las características hidrogeológicos del terreno.[EN] This paper makes clear the importance of the explosive volcanism is the field of the quaternary volcanism of Girona, especially in Olot area where the most recent episodes aare concentrated. Fourteen volcanic cones undergoing some phreatomagmatic or phereatic explosive phases during their evolution have been identified. The hydromagmatic activity gives rise to a wide variety of pyroclastic deposits, whose study has enable to distinguish several eruptive sequences in these volcanoes. The differences of explosive ways of water/magma interaction in each volcano, which are determined by the geogical structure of the last hundreds of metres of the crust and, especially, by the hydrogeological features of the ground.Peer reviewe

A Geoethical approach to the governance of social-ecological systems: the case of Delta del Tordera

This paper presents the geoethical dilemma of the coastal zone of the Tordera Delta as a case study with the objective of showing the contribution of geoethics to the governance of coastal social-ecological systems. The Tordera Delta, located in the southern Costa Brava, Catalonia, constitutes a social-ecological system that suffers from intense anthropization mainly due to tourist pressures on the coast. The massive tourism of “sun and beach”, although it brought human well-being and economic development to the region, has caused a heavy urbanization of the coastline that altered the coastal dynamics, eroded its beaches and degraded many ecosystem services, something that is aggravated today by the climate change events in terms of rising sea level as well as the magnitude of the storms ("llevantades"), typical of the Western Mediterranean coast. Posing the problem of governance in terms of a geoethical dilemma means discerning among the values that refer to the intrinsic meaning of coastal landscapes and much more instrumental values that see beaches as goods (commodities) for tourism uses. Finally, the paper reflects if there is a way to overcome this dichotomy of values by briefly considering meaning values as elements that forge cultural identities as further research.Peer reviewe

A Geoethical Approach to Unlock a Social-Ecological Governance Problem: The Case of the Tordera River (Catalonia, Spain)

© 2021 by the authorsThis paper introduces a geoethical dilemma in the coastal zone of the Tordera Delta as a case study with the objective of showing the contribution of geoethics to the governance of coastal social-ecological systems. The Tordera Delta, located in Costa Brava, Catalonia, constitutes a social-ecological system that suffers from intense anthropization mainly due to tourist pressures causing a cascade of different environmental problems impacting the Delta functions. The massive sun and beach tourism brought human well-being and economic development to the region, but has caused an intense urbanization of the coastline that altered the coastal dynamics, eroded its beaches, and degraded many ecosystem services, a process that is being worsened today by the climate change events such as the rising sea level or the magnitude of the storms (“llevantades”), typical of the Western Mediterranean coast. Posing the problem of governance in terms of a geoethical dilemma enables discerning among the values connected to the intrinsic meaning of coastal landscapes and the instrumental values that see beaches as goods (commodities) for tourism uses. Finally, the paper reflects on options to overcome this dichotomy of values by considering meaning values as elements that forge cultural identities, contributing to highlighting this societal challenge in the Tordera Delta area, as a case study that can be useful for similar ecosystems.This paper was carried out partially and received funds within the framework of the ECOPLAYA project (CGL2013-49061) of the National Research Plan of Spain in R+D+i. The authors gratefully acknowledge the ISAAC-TorDelta and the REDAPTA projects coordinated by CREAF with the support from the Biodiversity Foundation of the Ministry for Ecological Transition of Spain that contributed to the development and implementation of the called “Taula del Delta i de la Baixa Tordera (TDBT)” for which we also thank many regional stakeholders involved in the process.Peer reviewe

Ús i abús de la natura, impactes i propostes de gestió. El cas de Catalunya com a paradigma

78 pages, 10 figures, 20 tablesFem aquí un balanç dels darrers quaranta anys d'ús, en molts casos abús, dels recursos naturals a Catalunya, un país representatiu dels països europeus, en especial dels mediterranis. [...]Peer reviewe