Introduced species

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A tree species occurring outside its natural range (past or present) and dispersal potential (i.e., outside the range it occupies naturally or could occupy without direct or indirect introduction or care by humans). If the species occurs naturally within the country borders it is considered native for the entire country. Naturally regenerated forest of introduced tree species should be considered as “introduced” up to 250 years from the date of original introduction. Beyond 250 years, the species can be considered naturalized (FRA 2018[1]).

  1. Terms and definitions - FRA 2018