남해안 여수 가막만에 서식하는 중형저서동물의 분포 특성
Distributional Characteristics of the Meiobenthic Community in Gamak Bay in the South Sea, Korea
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초록
본 연구는 가막만에 서식하는 중형저서동물의 계절적인 변화와 공간분포 특성을 연구하였다. 2009~2010년에 걸쳐 10개 정점에서 2월, 6월 10월에 총 6회 조사를 실시하였다. 가막만에 서식하는 중형저서동물의 군집구조, 분류군 다양 도, N/C ratio를 분석하였다. 연구기간 동안 선형동물과 저서 성 요각류의 서식밀도가 가막만의 중형저서동물 그룹중 가 장 높은 서식밀도를 나타냈다. 분류군 다양도 값은 가막만의 내만역에 비해 외해에 인접한 정점들이 높은 값을 나타냈다. N/C ratio는 각 지역별로 저서생태계의 오염을 모니터링 하 기 위한 지수인데, N/C ratio 분석결과 가막만의 내만역의 N/ C ratio 값이 외해에 인접한 정점들에 비해 높은 값을 나타내 내만역의 오염도가 상대적으로 높은 값을 나타냈다.
Abstract
This study investigates seasonal variation and spatial distribution of meiobenthic community of Gamak Bay (one of the major bays of southern coastal area of Korea). Total of 6 surveys of 10 stations took place, once in February, June and October of 2009 and through 2010. Community structure, taxon diversity (H′) and nematodes/copepods ratio of meiobenthos were studied in Gamak Bay. During the study period, nematodes and harpacticoids were the most dominant taxa among the meiofaunal groups in Gamak Bay. Taxon diversity (H′) was the highest at the outer stations and the lowest at the inner stations in the Gamak Bay. The nematodes/copepods ratio was seasonally studied as an index of pollution monitoring for the benthic ecosystem at each station. As a result, nematodes/copepods ratio was the highest at the inner stations and the lowest at the outer stations in Gamak Bay.
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