Phytosociological investigations of Aster kantoensis community were carried out along the main stream of Sagamigawa River within Kanagawa Prefecture. The data were treated as Kummerovio-Asteretum kantoensis Miyawaki et Okuda 1972, and existing condition was recorded based on its component species. Further, with reported data along the Sagamigawa River, ecological significance of its under units was examined based on life-form spectrum, average number of species and differential species thereof. The results of this study revealed that subassociation with Artemisia capillaris is a developed succession progress, as reported by Okuda (1978), and variant with Bromus japonicum can be positioned as a spring phase of its seasonal succession.

View full abstract

In Kanagawa prefecture, Zizina otis Fabricius inhabits only in Miura Peninsula, and it is now threatened with possible extinction. One of the habitats is the grassland at the seashore, but it has been destroyed by recreational developments.Therefore the proper management of another habitat, such as the site of residence where food plants are found in grassland, is important for conservation of this butterfly.

View full abstract