Vegetation on the embankment slope two years after revegetation in consideration of local biodiversity of Miyajima Island

Abstract

To accumulate knowledge on revegetation associated with development in natural parks, we clarified the characteristics of vegetation on the slope of a waste landfill on Miyajima Island up to 2 years after revegetation with local seedlings. 18 months after revegetation, feeding damage by sika deer was confirmed. At 20 months, a herbaceous community 1.41 to 1.95 m tall had become established. The number of species and vegetation coverage tended to be higher in the lower part of the slope than in the upper, and species diversity and degree of succession increased. Furthermore, the target vegetation Quercus glauca was under pressure in the quadrats dominated by Artemisia indica var. macximowiczii, whereas species diversity and the degree of succession was increased in quadrats where the parasitic alien species Cucusta campestris was abundant. This could be attributed to the suppression of the height of the dominant herbaceous species, suggesting the need for mowing.