• Alien plant invasions and native plant extinctions : a six-threshold framework 

      Downey, Paul O.; Richardson, David M. (Oxford University Press on behalf of the Annals of Botany Company, 2016-07-15)
      Biological invasions are widely acknowledged as a major threat to global biodiversity. Species from all major taxonomic groups have become invasive. The range of impacts of invasive taxa and the overall magnitude of the ...