Appendix S1 Examples of online databases and lists of invasive plant species.

Appendix S2 Database of invasive trees and shrubs in 15 regions of the world, showing the main reason(s) for introduction of species [see Methods for criteria for inclusion on the list].

Appendix S3 Invaded ecosystems, invasion processes, impacts and determinants of invasibility for invasive alien trees and shrubs: a primer.

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