제주고사리삼(Mankyua chejuense) 자생지의 식물상 및 계절별 식생 변화

Abstract

This research was conducted on the species composition, life-form, important value and the similarity index among the sites to be utilized as fundamental data for the study of Mankyua chejuense. The 95 taxa invetigated on Mankyua chejuense habitats were composed of 45 families, 77 genera and 95 species. The sperctrum of life-forms was M, Th-R5-D4-e. From type of invasion strategy, infiltration type was 60 % , phalanx type was 23.2 % and guerrilla type was 16.8 %. The average important values of plant species in the investigated areas were as follows: Ardisia japonica 39.6 %, Ulmus parvifolia 24.5 %, Rosa multiflora 22.1 %, Cudrania tricuspidata 19.4 %, Hydrocotyle maritima 14.3 %, Liriope spicata 13.5 %, Mankyua chejuense 12.4 %, and Carex phacota 11.5 % in the order of plant species with high value. In the upper layer the species with average important value more than 5 % exhibited delicate change of their values depending on seasons. In the lower layer the species with average important value more than 3 % were classified into 6 types. The change of important value in aquatic plants generally appeared in Spring, reached high in Summer, and disappeared in Autumn or Winter. In the upper layer of each sites, the important value was highest in Ulmus parvifolia in the sites 1, 2, 3 and 7, in Cudrania tricuspidata in the sites 4, 5, and 8, and in Rosa multiflora in the site 6. From the species that constitute the lower layer the important value was highest in Ardisia japonica in the sites 1, 4, 7, and 8, in Persicaria?praetermissa in the site 2, in Viola verecunda 3, in Hydrocotyle maritima in the sites 5 and 6. Similarity index was highest between sites 3 and 4 and was lowest between sites 4 and 6.