Abstract
It has been attempted in this paper to explicate the factors surrounding the occurrence of plant species growing in natural forests into artificial forests planted with native tree species constituent mainly of climax-forest on land reclaimed from the sea around Tokyo Bay, Chiba Prefecture. The woodlands investigated had a canopy covering of over 60% and were selected from 20 stands of artificial forests planted 12-35 years previously, and 36 stands of natural forests. The occurring species having few parent plants in or near the stand were separated into two groups: the first group showing a higher abundance rate of occurrence in the all stands consisted of 7 species, and the second showing a lower rate was made up of 11 species. And many species in the first had higher occurrence than those in the second under either light conditions indicated by the canopy coverage. The former also included many species which favored sites at the edge of the woodlands, while the latter preferred areas further in. However, the shore location had very little affect on the plant species occurring in the artificial forests.
