Focusing on alien plants observed for the first time after 1950, the number of taxa alien to Europe shows an increasing trend during the recent decades, except for the period 2011–2019 ( Fig. 6A ).
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Focusing on alien plants observed for the first time after 1950, the number of taxa alien to Europe shows an increasing trend during the recent decades, except for the period 2011–2019 ( Fig. 6A ).