TY - JOUR A1 - Novoa, Ana A1 - Kumschick, Sabrina A1 - Richardson, David M. A1 - Rouget, Mathieu A1 - Wilson, John R. U. T1 - Native range size and growth form in Cactaceae predict invasiveness and impact T2 - NeoBiota N2 - Many recent studies in invasion science have identified species traits that determine either invasiveness or impact. Such analyses underpin risk assessments and attempts to prioritise management actions. However, the factors that mediate the capacity of an introduced species to establish and spread (i.e. its invasiveness) can differ from those that affect the nature and severity of impacts. Here we compare those traits correlated with invasiveness with those correlated with impact for Cactaceae (“cacti”) in South Africa. To assess impact magnitude, we scored 70 cacti (35 invasive and 35 non-invasive species) using the Generic Impact Scoring System (GISS) and identified traits correlated with impact using a decision tree approach. We then compared the traits correlated with impact with those identified in a recent study as correlated with invasiveness (i.e. native range size and growth form). We found that there is a significant correlation between native range size and both invasiveness and impact. Cacti with larger native ranges were more likely to become invasive (p=0.001) and cause substantial impacts (p=0.01). These results are important for prioritising efforts on the management of cactus species. Understanding when and why impact and invasiveness are correlated (as they appear to be for Cactaceae) is likely to be an important area of future research in risk assessment. KW - Biological invasions KW - invasibility KW - invasiveness KW - risk assessment KW - spread KW - weediness Y1 - 2016 UR - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/45589 UR - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-455897 VL - 2016 IS - 30 SP - 75 EP - 90 ER -