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Community Structure of Macrobenthic Invertebrates of Fishing grounds in the coastal waters of Jeju Island

제주도 연안 마을어장의 저서무척추동물 군집구조

  • 고준철 (국립수산과학원 아열대수산연구센터) ;
  • 구준호 (국립수산과학원 아열대수산연구센터) ;
  • 이승종 (국립수산과학원 아열대수산연구센터) ;
  • 장대수 (국립수산과학원 아열대수산연구센터) ;
  • 조성환 (연안생태기술연구소)
  • Received : 2011.09.16
  • Accepted : 2011.09.26
  • Published : 2011.09.30

Abstract

This study was performed to know and compare the community structures of macrobenthic invertebrates of eight fishing grounds in the coastal waters of Jeju Island from September to October 2008. A total of 166 species was identified. Mollusks comprised 77 species (46.4%); Arthropods 24 (14.5%), Cnidarians 18 (10.8%); Poriferans 16 (9.6%); and the others including Echinoderms 33 (17.7%). Density and biomass were estimated to be 6,905 ind./$m^2$ and 113,100.7 gwwt/$m^2$, respectively. Gastropods was the most dominant taxon in terms of abundance (3,311 ind./$m^2$) and number of species as well, and Gastropods was predominant in biomass (55,789.2 gwwt/$m^2$). The dominant species were Omphalius pfeifferi, Astralium haematragum, Turbo cornutus, Ergalatax contraacta, Lithophaga cura, Anthocidaris crassispina, Herdmania monus in 5-15 m. Based on the cluster analysis, the study area could be divided into two station groups. The biodiversity, evenness and richness index appeared as follows: H' = 1.59-2.95, E' = 0.38-0.87, R = 3.3-10.4. The dominance index were highest in Daepo and lowest in Woljeong.

제주연안 8개 마을어장 주변해역에서 2008년 9월부터 10월까지 저서 무척추동물의 군집구조를 파악하기 위해 조사하였으며 그 결과는 다음과 같다. 조사기간 중 총 166종의 저서동물이 채집되었고, 연체동물이 77종 (46.4%) 이였으며, 이 중 복족류가 25.3%로 가장 우점하였고, 절지동물 24종 (14.5%), 자포동물 18종 (10.8%), 해면동물 16종 (9.2%) 및 기타 동물은 33종 (17.7%) 의 순으로 나타났다. 조사해역의 개체밀도와 생체량은 각각 6,905 개체/$m^2$, 113,100.7 gwwt/$m^2$로 연체동물 중 복족류가 개체수와 생체량에서 우점하였다. 주요 우점종은 팽이고둥 (Omphalius pfeifferi), 바퀴고둥 (Astralium haematragum), 소라 (Turbo cornutus), 탑뿔고둥 (Ergalatax contraacta), 애기돌맛조개 (Lithophaga cura), 보라성게 (Anthocidaris crassispina), 분홍멍게 (Herdmania monus) 로 주로 복족류와 해초류에서 높은 우점율을 나타냈다. 군집유사도의 집괴분석을 실시한 결과 크게 북부와 남부해역 및 서부해역의 2개 그룹으로 나눌 수 있었다. 정점별 종다양도 (H'), 균등도 (E') 및 풍부도 (R) 지수의 범위는 각각 1.59-2.95, 0.38-0.87, 3.3-10.4 로 종다양성 및 개체수 균일성이 가장 안정된 지역은 남부인 대포리에서 가장 높게 나타났고, 북부에 위치한 월정에서 낮게 나타났다.

Keywords

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