Conférence de Ariel Farias (Universidad de la República, Uruguay)


 AHLeGall    21/06/2017 : 21:55

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Dans le cadre de son séjour à l'INRA, Ariel Farias donne une conférence le mercredi 21 juin, de 11h à 12h, en salle GE, bâtiment 4 (Linné) de l'Agrocampus Ouest - Rennes, intitulée "Diversity and conservation of South American carnivorans (Mammalia, Carnivora) at the agricultural frontier of Southern Chile".

Dans le cadre de son séjour à l'INRA, Ariel Farias donne une conférence le mercredi 21 juin, de 11h à 12h, en salle GE, bâtiment 4 (Linné) de l'Agrocampus Ouest - Rennes, intitulée "Diversity and conservation of South American carnivorans (Mammalia, Carnivora) at the agricultural frontier of Southern Chile".


Abstract
South America hosts a diverse assemblage of carnivorans (Mammalia, Carnivora). These species play a variety of roles in ecosystems, and despite their relatively low abundance they can exert a strong influence on community structure and ecosystem function, frequently acting as keystone species. At the same time, their habitat requirements and trophic position make them sensitive to habitat degradation and prone to conflict with human activities. This becomes particularly notorious at the interface between agricultural and wilderness landscapes, where native carnivoran assemblages get closely in touch with human activities. Such agricultural frontier have expanded widely in South America in the last few decades, hand in hand with accelerated economic growth of countries still largely dependent on extractive activities, thus exerting strong pressure on native carnivore assemblages.
Since 2009, we investigate the association between South American carnivoran diversity and changes in land cover at different spatial scales, focusing on their taxonomic and functional components, consequences in the distribution of species of conservation concern, and their interaction with introduced carnivorans. We identified biomes were carnivore assemblages are more threatened, and demonstrate strong discordances in predicted risk for functional and taxonomic diversity. For one of the most (functionally and taxonomically) threatened ecorregions, the evergreen valdivian temperate forest, we found that carnivoran's diversity and distribution is affected not only by forest conversion and fragmentation, but also by the presence of alien carnivoran species. In particular, forest degradation and free-ranging domestic dogs may be exerting a strong pressure on an endangered charismatic and endemic canid, the Darwin's fox (Lycalopex fulvipes), whose known distribution we recently extended to include vulnerable relicts of temperate forest on the southern coastal ranges of Chile. Future perspectives comprise addressing human dimension of the carnivore-human conflict, including the interaction between economic activities, land conversion, cultural practices and management of domestic species.


Contact OSUR
Audrey Alignier (BAGAP) / @





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