Table 2: Summary of
hypotheses that fall under an enemy framework and how they can be
encompassed by process and ecological context. The proposed explanations
are examples only; e.g. a high relatedness to native species could mean
an exotic is more vulnerable to enemies (because it is a more familiar
target for enemies in the invaded range), or less vulnerable to enemies
(because it likely possesses defences that will be effective against
enemies in the invaded range). Our goal is not to suggest which
hypotheses are more or less likely overall, but to highlight the
conditions that could lead to each one and demonstrate how considering a
core set of factors and contexts can unify the hypotheses into a single
tractable framework. List and summary of hypotheses is from Catfordet al. 2009 and references therein.