The Korean Journal of Malacology (한국패류학회지)

The Malacological Society of Korea (한국패류학회)
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Short-term changes of community structure of microbenthic invertebrates in the coastal waters Jeju Island, Korea from 2013 to 2015

제주연안 저서무척추동물 군집구조의 단기변화 (2013-2015)

  • Received : 2016.12.05
  • Accepted : 2016.12.30
  • Published : 2016.12.31
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Abstract

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 $71,007ind./m^2$ and $599,208.0gwwt/m^2$, respectively. Gastropods was the most dominant taxon in terms of abundance ($24,625ind./m^2$ ) and number of species as well, and Gastropods was predominant in biomass ($190,789.0gwwt/m^2$). 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.

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/$m^2$, $599,2008.0gwwt/m^2$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.

Keywords

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