Two key hypotheses in invasion biology are that certain traits underlie invasiveness in
introduced species, and that these traits are selected for during or after introduction. We
tested these hypotheses by focusing on two traits likely to confer invasiveness, high increase
in growth in response to increase in nutrients and low decrease in growth in response to
competition. We compared four species of Carpobrotus that differ in invasiveness, using
species from four continents: Africa, Australia, Europe and North America. To test for …