2. This assessment acknowledges that national and local legislation to 
address biological invasions differ between countries and may include 
different definitions appropriate to specific national and local contexts.
3. Multiple alternative terms exist to refer to alien species.
THE THEMATIC ASSESSMENT REPORT ON INVASIVE ALIEN SPECIES AND THEIR CONTRO
The thematic assessment report on
INVASIVE ALIEN SPECIES
AND THEIR CONTROL
DEFINITIONS, CONCEPTS
AND THE CONTEXT OF 
THE ASSESSMENT