Abstract
Semi-natural grasslands in Iwate Prefecture have decreased rapidly in recent decades. To clarify the appropriate methods of the conservation for the plant communities, we surveyed remaining plant communities and compared current and past plant occurrence data. The result showed that current plant communities were dominated by Miscanthus sinensis (Ms1 type, Ms2 type) and Zoysia japonica (Zj1 type, Zj2 type) . Some of species in past M. sinensis communities also occurred in Z. japonica types in this study. According to the management strategy of the M. sinensis communities in past, burning in spring and cutting in autumn was considered to be important for the establishment of the communities. Furthermore, the current plant communities showed the progress of vegetation succession. In order to conserve the communities, we thought that it was necessary to improve the management that cut plants are brought out from ones.
