2nd World Conference on Biological Invasions and Ecosystem Functioning November 21-24 2011, Mar del Plata, Argentina BIOLIEF 2011 will be a forum for the presentation, discussion, and synthesis of research on biological invasions in its broadest  sense. The conference will place a particular emphasis on studies concerning the impact of invasive species on ecosystem  functioning and/or services, irrespective of taxonomic groups or ecosystem types. However, studies on any other ecological  aspect of biological invasions will also be welcome. Topics such as the spread of invasive species into ecosystems, the  biogeography and history of species introductions, and the community- or species-level impact of biological invasions will also  have an important coverage in the final conference program.