subsequent feedback facilitating the establishment and 
spread of other invasive alien species (well established)
{3.4.2}. Indirect drivers also interact with one another. For 
example, sociocultural changes may lead to increased rates 
of infrastructure development through urbanization, and 
these interactions may further influence the rate and 
magnitude of change in land- and sea-use and other direct 
drivers that may in turn facilitate biological invasions (well 
established) {3.2.1}. Feedback and non-linear relationships 
among interacting drivers are likely to be exacerbated with 
ongoing and concurrent amplification of drivers (established 
but incomplete) {3.1.1, 3.5, 3.6.3, Box 4.5}, potentially 
leading to numbers of invasive alien species never previously 
encountered (established but incomplete) {2.6.1}.
31SUMMARY FOR POLICYMAKERS
19SUMMARY FOR POLICYMAKERS
BACKGROUND
TIC ASSESSMENT REPORT ON INVASIVE ALIEN SPECIES AND THEIR CONTRO