Ecological diversity of Street trees in Yokohama City

Abstract

The environment of street trees is so particularly stressful that street trees management has been practiced by physio-ecological methode up to now, and street trees are increasingly simplified by few species of high adaptability to environment. So it may be difficult to cope with uncertain future environment change such as occurrance of peculiar damage for predominant species. In this study, we tried to introduce the concept of ecological diversity into the management of street trees to manage them from macroscopical view point, using the data of Yokohama city. It became clear that we should research richness, evenness, evenness of distribution, and age distribution of street trees to manage them.