抄録
We aimed to clarify the present vertical distribution of vegetation and the impact of volcanic activity on this distribution. In 2007, we conducted a vegetation survey ranging from 220 m to 500 m above sea level in the
Amida river basin that is located on the northern flank of Mount Sakurajima. Tree age, numbers and species of trees, and the Fisher-Williams'index of diversity tended to decrease with increasing of elevation. Moreover, these items also tended to decrease with increasing thickness of the volcanic ash layer deposited since the Taisho eruption in 1914, the median diameter of solid particles in the volcanic ash layer, and the dry density of the volcanic ash layer. However, comparing 2007, when vegetation suffered a severe impact from volcanic activity, with 1963, when vegetation was only slightly impacted by volcanic activity, the vegetation in 2007 was found to be destroyed down to around 220 m above sea level. Thus vegetation succession in 2007 was much poorer than that in 1963.
https://ror.org/03ss88z23 
