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Plant community assembly in invaded Mediterranean ecosystems Some non-native plants can establish self-sustaining populations and become naturalised in new regions, causing strong impacts by affecting the native flora and fauna, and also the ecosystem services on which people rely. Most biogeographic studies to disentangle the causes of success have compared non-native species populations in the native and in the introduced range, while there have been few approaches at the community level. This thesis will focus on community assemblage of native and non-native plant species on Mediterranean ecosystems. The analysis will be performed at different levels of ecological resolution and will be based on the analysis of large plant datasets, previous empirical data on functional traits, field surveys, and experimental tests. The methodological approach will use tools of functional ecology. Plant functional traits are heritable features, easily measurable at the individual level, and associated to fundamental axes of functional differentiation. The analysis of traits permits the establishment of hierarchies among species which are conserved across environments, therefore allowing for comparisons. My thesis, by scanning plant traits between coexisting native and non-native species across transcontinental areas, will improve our understanding on the biogeography of plant invasions in Mediterranean regions.

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