KM-B4 The magnitude of the future threat 
from invasive alien species is difficult to predict 
because of complex interactions and feedback 
among direct and indirect drivers of change in 
nature {B10, B13, B14}. Climate change interacting with 
land- and sea-use change is predicted to profoundly shape 
and amplify the future threat from invasive alien species. 
Interactions among climate change, land-use change 
and invasive alien species can alter and intensify natural 
disturbance regimes, such as wildfires. Variations in human 
perceptions and values add yet another level of complexity, 
as sociocultural drivers interact with other indirect drivers 
and influence direct drivers. Such interactions may lead to 
unprecedented numbers of invasive alien species, with the 
consequent amplification of their impacts.
SUMMARY FOR POLICYMAKERS
The thematic assessment report on
INVASIVE ALIEN SPECIES
AND THEIR CONTROL
B. Globally, invasive alien species 
and their impacts are increasing 
rapidly and are predicted to 
continue rising in the future