Ecological Characteristics of Plants Invading/Colonizing Street Tree Bases

抄録

The spaces located at the bases of street trees (hereinafter referred to as “street tree bases”) are invaded/colonized by numerous of plants. These invading/colonizing plants are typically considered to be weeds and are eliminated. In recent years, several studies have been published that frame these invading/colonizing plants in a positive light (improving the urban biodiversity). In the present study, we investigated investigations on the methods by which plants colonize street tree bases and the relationship between invading/colonizing plants and street tree base area. We surmised that the most plants invading/colonizing street tree bases dispersal seeds on nearby greenspaces and spread via secondary dispersal through attachment to people and cars. In addition, depending on the tree species, street trees themselves may serve as one of sources for plants invading/colonizing street tree bases. On the other hand, even in a small space such as a street tree bases, a combination of these can serve as spaces for play a role like an urban greenspaces.