species has been both successful and cost-effective 
for terrestrial and closed water systems, especially in 
biogeographically isolated areas such as small islands 
and lakes (well established) {5.3.1, 5.3.2, 5.5.4}. While 
SUMMARY FOR POLICYMAKERS
19SUMMARY FOR POLICYMAKERS
BACKGROUND
C. Invasive alien species and their negative impacts can 
be prevented and mitigated through effective management