Abstract
Chikuranuma pond has been derived from a dammed lake made by lave of Chikura volcanic mountain erupted in Pleistocene. According to a phytosociological study by the Braun-Blanquet approach, the following plant communities were recognized : one kind of floating leaf community, three pond shore communities, three sedge swamp communities, and two swamp forest communities. From the result of pollen analysis, the vegetational change of Chikuranuma for approximately 9,500 years was traced.
