충남지역 무인도서의 식물상에 관한 연구

Abstract

Through a national survey of the natural environment of the uninhabited islands and a detailed survey of the specific islands, the vascular plants of uninhabited islands in Chungnam Provinces were identified as a total of 756 taxa of 118 families, 400 genera, 664 species, 11 subspecies and 73 varieties. This taxa for about 16% of the 4,596 species of the entire Korean Peninsula, including recently introduced naturalized plants. The flora was counted as 26 taxa of pteridophytes, 5 taxa of gymnosperms, 546 taxa of dicotyledon of angiosperms, and 179 taxa of monocotyledon plant. The flora is close to the southern subgroup phytologically in that it has the characteristics of distribution of a number of southern plants, including Meliosma oldhamii, Carpinus erosa, Camellia japonica and Quercus acuta, Pittosporum tobira, Lemmaphyllum microphyllum. Three taxa(Lycoris chinensis var. sinuolata, Iris dichotoma, Viburnum burejaeticum) of endangered wildlife designated by the Ministry of Environment was found, and 14 taxa(Hepatica insularis, Weigela subsessilis, Thalictrum actaefolium var. brevistylum etc.) were found for endemic species, 164 taxa (6 taxa at V level, 8 taxa at Ⅳ level, 43 taxa at Ⅲ level, 31 taxa at Ⅱ level, 76 taxa at Ⅰ level) for floristic target species, and 55 taxa (Rumex crispus, Sonchus oleraceus, Conyza canadensis, Fallopia dumetorum etc.) for naturalized plants. The ecosystem disturbed plants were identified as 5 taxa (Ambrosia artemisiifolia, Rumex acetosella, Aster pilosus, Lactuca scariola, Humulus japonicus). The vascular plants that were academically important or noteworthy were Serratula coronata subsp. insularis, Sisymbrium luteum and, Arisaema thunbergii. Grazing goats were investigated as the most important factor threatening the survival and prosperity of plants, and management measures were expected to be necessary. On the other hand, it was determined that some plants, including Viburnum burejaeticum, Athyrium iseanum and Iris uniflora var. caricina, were likely misidentified due to their species distribution characteristics. It is needed to be carefully monitored in during future investigations.