Forests containing both native and non-native tree species are referred to as non-native selection forests.
In terms of diversity, this type of forest has fewer plants and animals than their native counterpart. They do, however, contain unusual flora and fauna unique to non-native forests. These forests are often created by planting non-native tree species. After planting primarily Douglas fir, Japanese larch, Corsican pine, and American oak, native trees such as birch, oak, and beech started cropping up naturally.
This natural blending can largely be found along the forest edge. What makes these forests so enjoyable is the large variation in both species and light and dark areas.