Abstract
The purpose of this reserch is to investigate the flora of Dumi Island. This island locates at $128^{\circ}$ 13' E. longitude and $34^{\circ}$ 41' N. latitude. As a result of our investigation, the distribution of plants on Dumi Island could be summarized as follows. The vascular plants through this investigation were 66 families, 121 genera, 127 species, 16 varieties, 2 forma, and 145 kinds. From 1945 to 1960, most Pinus densiflora and Quercus mongolica were cut and sent as fuel to the cities of Masan, Chungmu and Samchunpo. After these deforestation years, there was a change of policy in the area and then wood was substituted by coal blacks as fuel and along with this occurs reforestation. Because of the reforestation by the present administration and natural means of suctrees, Castamopsis cuspidata var. thunbergii, Camellia japonica and Machilus japonica; they were found to exist near Sheonangdang in the northern region at Hakli and at Kuchun in the south. In the central part of the island at Mt. Chunhwang there are slopes of 20-30 degrees which are cultivated by the islanders this mountain which can be cultivated and 65% or 830 islanders are farming this land. Although this 125.4 hectors is not a large portion, this mountain with its variety of growth at different elevations, seems to be very fertile causing thick growth at any level.
본 연구에서 밝혀진 본도의 관속식물류는 66과, 121속, 127종, 16변종, 2품종이고 총 145종류이며 한국의 관속식물(4,191종류; 중정, 1952)의 3.46%에 해당된다. 1945년부터 1960년까지 15년간은 부산, 마산, 충무, 삼천포등지로 연료를 공급하기 위해 많은 나무가 벌채되었으나 연탄의 사용으로 벌채가 중단되고 도내의 임야녹화로 복원되었다. 행정당국의 장려로 곰솔의 식재와 자연번식으로 본도는 곰솔이 우점종으로 나타났다. 상록활엽수는 구전의 서낭당림의 동백나무, 센달나무등의 노수목을 비롯해서 28종이였다. 도내의 중앙에 위치하는 천황산(467m)의 산록지대의 경사지($20{\circ}~30{\circ}$)에 옥수수와 고구마를 주로 가꾸고 있었다. 본도에 분포하고 있는 경제식물은 식용식물 68종, 약용식물 69종, 관상용식물 23종, 공업조자원 1종, 용재자원 15종, 섬유자원 4종, 목초자원 2종, 잡용자원 21종으로 분류되었다.