Figure 4. Total number of plants alien in Europe firstly recorded in the wild after 1950, per gateway country and associated with the CBD introduction pathway.

Proportion of plants alien in Europe firstly recorded in the wild after 1950, through different CBD subcategory introduction pathways, per gateway country (i.e., countries of first observation in the wild). For clarity, data is shown for countries with more than 10 first records of alien plants. Taxa linked to more than one pathway were given a value of 1/k for each of the k associated pathways so that the overall contribution of each taxon to the total number of new arrivals was always 1.