Abstract
This paper is to assess the impact of the spatial characteristics such as area and connectivity of biotope on species abundance in urban landscape. Dragonfly communities are chosen as biological indicator and evaluation criteria is established based on their lifecycle and habitat. Stepwise multiple regression analysis is performed between species number and area of several biotope types. Also, to quantify biotope connectivity, two indexes indicating isolation degree and interaction between biotopes is calculated. As a result, the following are found; first, area of pond are significant for the species abundance of dragonfly as well as are of wood and grass. Second, both isolation degree and interaction degree of pond are influential factor to determine species abundance.
