The Cape Horn Biosphere Reserve is located at the southern tip of South America. This large archipelago is considered one of the last pristine areas left on the world. Despite it being an unpopulated area with most of the native forest cover intact, it has not been exempt from biological invasions, one of the major drivers of biodiversity loss. Three species that naturally interact in their native range in North America – American beavers (Castor canadensis), muskrats (Ondatra zibethicus), and American mink (Neovison vison) – were independently introduced in this remote region. In my dissertation, I investigated (i) the hypothesis of niche expansion in the invasive mink population on Navarino Island towards terrestrial habitats; (ii) potential mink impact on breeding success of forest-bird populations; (iii) habitat selection of small-rodent species and their perception on the mink's novel predation risk; and (iv) the dynamics of multiple-species invasions under the hypothesis of an invasional meltdown. Additionally, I worked within the framework of environmental philosophy. I provide an example of combining ecological and cultural dimensions within the International Long-Term Ecological Research network to disentangle the ethical dilemmas that surround the management of invasive species. I finally proposed a management plan based on the idea of multiple invasive species management, discussing potential solutions to overcome the challenges that the control of invasive species represent and to more effectively protect the biological integrity of the native ecosystems.

La tesi ha estat publicada pel Museu d'Arqueologia de Catalunya-Girona dins la Sèrie Monogràfica número 23 amb el títol La colònia grega de Rhode (Roses, Alt Empordà). 643 p. ISBN: 84-393-7334-1 / RESUMEn la primera part de la tesi es revisen els materials arqueològics i els documents de les excavacions antigues al jaciment grec de la Ciutadella de Roses (Alt Empordà). Es fan estudis comparatius i de conjunt amb els resultats proporcionats per les excavacions recents. A partir d'aquí s'obté una periodització del jaciment, des del moment de la fundació de la colònia massaliota de Rhode, al segon quart del segle IV aC, fins a la fi de la ciutat, al 195 aC. Es tracten aspectes de topografia, urbanisme i estudi dels edificis. La segona part analitza les produccions dels tallers ceràmics (vernissos negres, pastes clares, ceràmiques de cuina i altres produccions secundàries). Es fa una nova classificació, un estudi de les formes, de la cronologia i paral·lels. S'estudien les instal·lacions dels tallers, els forns, la seva capacitat, les argiles i les terreres. Es conclou amb una caracterització socioeconòmica i històrica de la ciutat, i dels aspectes històrics relacionats amb les fases de la seva fundació, desenvolupament i fi. / In the first part of this doctoral thesis archaeological materials and documents from old excavations in the Greek site of the Citadel in Roses are revised. Comparative and global investigation is carried out between information provided by old excavations and that coming from the more recent ones. The results help to put forward a site periodisation from the Rhode massaliot colony foundation, during the 4th century up to the ending of the village in 195 BC.Topographic and urban aspects as well as studies of the buildings are presented. The second half of the study analyzes the production of the pottery workshops (black varnishes, light pastes, kitchenware and other secondary productions). A new classification system is presented which is based on both morphological and chronological studies and their territorial similarities. Workshops installation, their ovens, their capacity, clays and claypits are examined.The paper is finished with a description of socioeconomic and historic aspects of the village and the historical traits concerning the foundation phases, their development and final stages.