The Sea:JOURNAL OF THE KOREAN SOCIETY OF OCEANOGRAPHY (한국해양학회지:바다)

The Korean Society of Oceanography (한국해양학회)
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The Community Ecology of Benthic Macrofauna on the Cheokjeon Tidal Flat, Incheon, Korea 1. Community Structure

인천 송도지역 척전 갯벌 대형저서동물의 군집 생태학 1. 군집의 구조

  • Published : 2001.08.31
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Abstract

An ecological study was performed to investigate the community structure of the benthic macrofaunal assemblage on the Cheokjeon tidal flat, Incheon, Korea. Benthic samples were collected between Sept. 1990 and July1992 at three stations to compare environmental factors with the structure of benthic community among station sand seasons. Overall, macrofauna comprised a total of 111 species, and the mean density (708.1 md./$m^2$) and biomass (214.9gWWt/$m^2$). The number of species and individuals of polychaetes, molluscs and crustaceans made up more than 80% of the total number. On the other hand, in terms of biomass, bivalves and holothuroideans indicated that they were the dominant faunal groups. Hierarchical classification using the Bray-Curtis coefficient categorized samples into 3 station and 4 faunal groups. In terms of q-mode, there consisted of upper, middle and low tidal flat stations, respectively. And four faunistic groups were established as follows: 1) Heteromastus filifomis-Mactra veneriformis-Solen strictus-Ilyoplax finggi (wide-ranging elevation specialists), 2)Nephtys chemulpoensis-Macrophthalmus gaponicus (high elevation specialists), 3) Glycera subaenea-Decorifer matusimana-Tritodynamia (middle elevation specialists) and 4) Nephtys polybranchia-Borniopsis tsurumaru-Asthenognathus inaequipes-Protankyra bidentata (low elevation Specialists).

인천 동춘동 척전 갯벌 저서동물의 군집구조를 알아보기 위하여 3개의 정점을 대상으로 1990년 9월부터 1992년 7월까지 2개년동안 격월별로 현장조사를 실시하였다. 조사 기간 중 총 111종, 평균 708.1 개체/$m^2$와 214.9 gWWt/$m^2$의 저서동물이 채집되었다. 출현 종 수와 개체수에 있어서는 환형동물의 다모류가, 생물량에 있어서는 연체동물과 극피동물이 대표적인 분류군이었다. 조위에 따른 저서동물의 출현 경향은 종 수와 개체수는 갯벌의 하부로 갈수록 뚜렷하게 증가하는 결과를 보였고, 생물량은 갯벌의 중부에서 가장 높았다. 척전 갯벌의 집괴분석 결과에 의하면, 3개의 정점군과 4개의 종군으로 구분할 수 있었다. 정점군은 조위에 따라 상부, 중부 그리고 하부 정점 그룹으로 나뉘었고, 종군은 다음과 같았다: 1) 중하부 광역분포 종군으로 Heteromastus filifomis-Mactra veneriformis-Solen strictus-Ilyoplax finggi 군집, 2) 상부 분포 종군으로 Nephtys chemulpoensis-Macrophthalmus gaponicus 군집, 3) 중부 분포 종군으로 Glycera subaenea-Decorifer matusimana-Tritodynamia 군집 ,4)하부 분포 종군으로 Nephtys polybranchia-Borniopsis tsurumaru-Asthenognathus inaequipes-Protankyra bidentata 군집으로 구분되었다.

Keywords

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