ISSN : 1225-3480
제주연안 5개 마을어장 주변해역에서 2013년부터 2015년까지 저서무척추동물의 군집구조를 파악하기 위해 조사하였으며 그 결과는 다음과 같다. 조사기간 중 총 629종의 저서동물이 채집되었고, 연체동물이 282종 (44.8%) 이였으며, 이 중 복족류가 31.8% 로 가장 우점하였고, 절지동물 88종 (14.0%), 해면동물 61종 (9.7%), 태형동물 52종 (8.3%) 및 자포동물은 51종 (8.1%) 의 순으로나타났다. 조사해역의 개체밀도와 생체량은 각각 71,007개체/<TEX>$m^2$</TEX>, <TEX>$599,2008.0gwwt/m^2$</TEX>로 연체동물 중 복족류가 개체수와 생체량에서 우점하였다. 주요 우점종은 바퀴고둥, 분홍멍게, 줄꼬마담치, 짧은미륵비늘갯지렁이, 상어껍질별벌레 로 주로 북족류와 해초류에서 높은 우점율을 나타냈다. 군집유사도의 집괴분석을 실시한 결과 5개 그룹으로 나눌 수 있었다. 정점별 종다양도 (H'), 균등도 (E') 및 풍부도 (R) 지수의 범위는 각각 4.28-4.64, 0.74-0.79, 33.17-35.45 로 종다양성 및 개체수 균일성이 가장 안정된 지역은 남부인 사계리에서 가장 높게 나타났고, 동부에 위치한 신흥리에서 낮게 나타났다.
This study was performed to know and compare the community structures of macrobenthic invertebrates of five fishing grounds in the coastal waters of Jeju Island from 2013 to 2015. A total of 629 species was identified. Molluscans comprised 282 species (44.8%), Arthropods 88 (14.0%), Poriferans 61 (9.7%), Bryozoans 52 (8.3%) and the others including Cnidarians 51 (8.1%). Density and biomass were estimated to be 71,007 ind./m2 and 599,208.0 gwwt/m2, respectively. Gastropods was the most dominant taxon in terms of abundance (24,625 ind./m2) and number of species as well, and Gastropods was predominant in biomass (190,789.0 gwwt/m2). The dominant species were Omphalius pfeifferi, Astralium haematragum, Musculus viridulus, Halosydna brevisetosa, Phascolosoma scolops, Herdmania monus in 5-20 m. Based on the cluster analysis, the study area could be divided into five station groups. The biodiversity, evenness and richness index appeared as follows: H' = 4.28-4.64, E' = 0.74-0.79, R = 33.17-35.45. The dominance index were highest in Sagye and lowest in Sinhung.
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