Effect of the introduction of exotic grasses to solid rock slopes on the vegetation succession of the site. Ecol. Civil Eng. 6(1), 1-14, 2003

Abstract

During the period from 1998 to 2000, revegetation was carried out at solid rock slopes (quarry sites, etc.). The sites investigated were 15 dams, 4 to 36 years after their construction, managed by Water Resources Development Public Corporation. The grasses which had been introduced dominated in all ten plots where the seeds of mainly exotic grasses had been sown for revegetation. Succession to native plant vegetation was not observed. The species diversity indices were lower in the plots with revegetation by exotic grasses than in the plots without such revegetation. The diversity indices were relatively high in the areas of revegetation near the existing vegetation. In the plots without revegetation, pioneer tree species including Rhus succedanea L., Rhus javanica L.var. Roxburgii (DC.) Rehder et Wils., Mallotus japonicus (Thumb, ex Murray) Muell. Arg., Clethra barvinervis Sieb. Et Zucc., and Pinus densiflora Sieb. Et Zucc. Were recorded. Among those, Rhus javanica var. Roxburgii, Mallotus japonicus, Clethra barbinervis, and Pinus densiflora grew relatively well even on solid rock. © 2003, Ecology and Civil Engineering Society. All rights reserved.