한국 해산 오수 무척추동물의 생물계통학적 연구를 위하여 대형저서동물의 분류와 생태학적 연구가 경제개발에 따른 산업발달의 영향을 받아온 온산만에서 행해졌다 재료는 온산만과 비오염지역에서성, 정량채집하였다. 연구기간 동안 채집된 저서동물 중 자포동물은 히드로충강 11종, 산호충강 10종이고, 연체동물은 다판강 16종, 복족강 126종, 부족강 42종이며, 척색동물의 해초강은 38종으로 총 243종이었다. 또한 이들은 여름에 온산에서 42종, 울기에서 88종이었고, 겨울에 춘도에서 106종, 당사에서 107종이었다. 종구성은 계절적 변화 및 오염상태와 관계되는 것으로 보인다. 대형저서동물군집은 비오염지역일수록 출현종수가 많아지고, 개체수와 습중량은 오염지역 일수록 많아지는 것으로 나타났다. 중요도에 따른 각 지역의 우점종을 보면 다음과 같다. 온산은 Obelia geniculata, Mytilus edulis, Ostrea circumpicta 3종, 춘도는 Botrylloides violaceus, Mytilus edulis, Crassostrea gigas 3종. 울기는 Melithaea flabellifera 1종, 당사는 Symplectoscyphus hozowai 1종이었다. 또한 이들에 대한 수직분포와 각 지역의 저질이 조사, 관찰되었다 저서동물 군집구조를 이해하기위하여 다양도지수(H), 균등도지수(e), 우점도지수(C) 등의 생태학적 지수가 측정되었다: H: 1.40-2.21: e: 0.21-0.36: C: 0.44-0.53.

For the biosystematic studies on the marine fouling invertebrates in Korea, a faunal and ecological study on macrozoobenthos was carried out at Onsan Bay, where have been affected by the industrial progress due to the economic development. The materials were collected from Onsan Bay and unpolluted area by qualitative and quantitative sampling methods. Macrobenthic animals collected during the study were identified 243 species in total which were consisting of 11 spp. in Hydrozoa. 10 spp. in Anthozoa among Cnidaria, 16 spp. in Polyplacophora. 126 spp. in Gastropoda, 42 spp. in Bivalvia among Mollusca. and 38 spp. in Ascidiacea. And they were 42 spp. from Onsan and 88 spp. from Ulgi in summer season and 106 spp. from Ch`undo and 107 spp. from Tangsa in winter season. The species composition seems to be related to seasonal variation and polluted conditions. Macrobenthic communities indicated that the number of species were more and more depending on unpolluted conditions, and the abundance and the biomass were more and more depending on polluted conditions. The dominant species investigated in these sites according to the importance value (Ⅳ) were as follows: Obelia geniculata, Mytilus edulis, Ostrea circumpicta at Onsan: Botrylloides violaceus, Mytilus edulis, Crassostrea gigas at Ch`undo: Melithaea flabellifera at Ulgi: Symplectoscyphus hozowai at Tangsa. And their vertical distribution and the substrata of each sites were investigated and observed altogether. In order to understand the structure of macrobenthic community, such as ecological indices like species diversity(H), eveness(e) and dominance(C) were measured: H: 1.40-2.21: e: 0.21-0.36: C: 0.44-0.53.