The relationship between biodiversity and invasibility in central Swedish lakes invaded by Elodea species

Since only a fraction of non-indigenous species (NIS) become invasive, it has long been a desirable goal to predict those associated with the largest risks. In addition, some environments have more frequently suffered from biological invasions than others, which has raised the question of whether environment invasibility can be predicted. Many attempts have been made to find general characteristics distinguishing NIS that have become invasive from those that have not, as well as invaded environments from non-invaded environments, but often with ambiguous results (Williamson 1999).