Management techniques to prevent Aster kantoensis Kitam. from escaping into the natural field at Futakotamagawa Rise.

Abstract

We are working to conserve Aster kantoensis Kitam. on the roof garden of Futakotamagawa Rise, a shopping mall located next to the Tamagawa River. Opportunities for the local community to rediscover the fascinating nature of the region are created through providing the opportunity to get to know A. kantoensis. On the other hand, it is necessary to prevent the escape of A. kantoensis from the conservation area into the wider environment. We annually conduct seed dispersal investigations and a carry out monitoring of escaped A. kantoensis in the conservation area. We also work with the public to find escaped A. kantoensis. Based on the results, we have developed a management zoning map to inform the control of potential outflow populations. We factored in wind direction and the garden type to define intensity of management within each zone. As a result of this project, we have developed adaptable management techniques with an emphasis on reducing costs. Both the conservation of A. kantoensis and its appeal to the local community have been enhanced through management using zoning maps.