제주도 연안 네 지역의 염생식물상과 식생

Abstract

The distribution of vascular plants in four coastal sites of northern (Jeju-si) and southern seashore (Seogwipo-si) of Jeju Island were investigated. The sediment environment was based on sand beach and rock bed. Fifty-two species involving 26 families, 45 genera, 47 species and 4 varieties were identified, and among those, the Gramineae, including 9 species was the most diverse group. 44.2 % of the vascular plant species were halophytes, involving 23 species of 13 families, 21 genera, 20 species, 2 varieties and 1 form. Vitex rotundifolis, Calystegia soldanella and Peucedanum japonicum were distributed in all the studied sites. Vitex rotundifolis was the dominant vegetation in both Pyoseonhaevichi beach and Namwon rock bed, while Vitex rotundifolia-Miscanthus sinensis var. purpurascens and Miscanthus sinensis var. purpurascens were predominant in Yongdam rock bed and Sinheung beach. Eight species of naturalized plants covering 4 families and 6 genera were observed; Urbanization and naturalized indices were 2.6 and 15.4 %. In addition to the species of coastal halophytes distributed in sand beach and a narrow rock bed, Limonium tetragonum, Suaeda maritima, Phragmites communis and Atriplex gmelini were found in a muddy sediment along the waterway of Sinheung beach. The most diverse coastal halophytes were observed in Pyoseonhaevichi beach, where the most broad range of plants were provided.