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Invasive tree species in Italy
Invasive alien tree species can have significant detrimental impacts on the habitats they invade
often transforming ecosystems. Invasive alien tree species were identified for 20 Italian
administrative regions from online databases, published papers and other online sources. In
total 25 invasive alien tree species were included in the study (Table 1) and the majority of
these were introduced to Italy during the 19th century. The study showed that riparian forests
are the most invaded forest type with 16 invasive alien tree species. Pedunculate oak forests,
oak-hornbeam and hornbeam forests, maple-European ash and maple-lime forests,
Mediterranean shrubland and chestnut forests all hosted more than 10 invasive alien tree
species. The non-native tree species invading the highest number of forest types were Robinia
pseudoacacia and Ailanthus altissima.
Table 1. 25 invasive alien tree species in Italy
Species
Family
EPPO Status
Native range No. regions
invasive
Acacia dealbata
Fabaceae
List IAP
Australia
2
Acacia mearnsii
Fabaceae
Australia
1
Acacia provincialis
Fabaceae
Australia
1
Acacia pycnantha
Fabaceae
Australia
1
Acacia saligna
Fabaceae
Australia
5
Acer negundo
Sapindaceae
America
6
Ailanthus altissima
Simaroubaceae
List IAP
China
20
Broussonetia papyrifera
Moraceae
Observation List
Asia
4
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