Trends in the numbers of invasive alien species introduction events [BIP]
Trends in the numbers of invasive alien species introduction events [BIP]
Indicator description
This indicator measures the trends of invasive alien species introduction events (IAS) of 21 countries, which were selected for having at least 30 records of species with a known invasion date. Species were designated as invasive according to standard evidence-based criteria. The indicator was based on 3914 IAS and 4903 species-country records. While all taxonomic groups were considered, the majority of the records are plants, invertebrates, fish, mammals and birds.