Association Between the Success of an Invasive Macrophyte, Environmental Variables and Abundance of a Competing Native Macrophyte.

The success of invasive species depends on the overcoming of abiotic and biotic filters. Abiotic variables likely have greater relative importance over invasion at broad spatial scales, while biotic interactions are more important at fine spatial scales. In this study, we tested the hypotheses that (i) the abundance of the invasive is more correlated with abiotic factors than with competing native species at broad spatial grain; and that (ii) abundance is more correlated with competing native species than with abiotic factors at fine spatial grain.