B14 Negative impacts of invasive alien species can 
occur long after first introduction, and currently 
observed threats from invasive alien species can 
lead to an underestimation of the magnitude of the 
future impact (well established) {1.4.4, 2.2.1}. There 
are often time lags in detection and reporting of newly 
introduced invasive alien species (well established) {2.2.1}. 
Some invasive alien species spread very rapidly, while others 
take longer to spread and fully occupy their potential ranges 
(well established) {2.2.1, 2.2.3}. For some invasive alien 
species, the impact is immediate and continues into the 
long-term (e.g., fast-spreading pathogens such as Zika virus 
and Batrachochytrium dendrobatidis (chytrid fungus), and 
fast-spreading predators such as lionfish), while for others 
31SUMMARY FOR POLICYMAKERS
19SUMMARY FOR POLICYMAKERS
BACKGROUND
TIC ASSESSMENT REPORT ON INVASIVE ALIEN SPECIES AND THEIR CONTRO