대부도 방아머리 연안 퇴적물에 서식하는 중형저서동물 군집 변동

Abstract

The Community structure of meiobenthos was studied seasonally at 5stations of Bangameori tidal flat and 3 stations of subtidal area in Daebudo near theShiwha dike in the west coast of Korea, from May 2000 to February 2001. Mean grainsize of intertidal stations ranged from 3.16 Φto 3.73 Φ(sand), subtidal stations were5.81~ 6.67 Φ(mud). Nematodes were the most dominant group among the representa-tive 19 meiofaunal groups at all stations in both tidal flat and sub -tidal area. The sub -dominant groups were benthic harpacticoid copepods and Sarcomastigophorans. Thedensity of meiobenthos ranged from 145 inds. 10 cm-2 to 2,057 inds. 10 cm-2 (0~ 1cm) in-2 (0~ 5 cm) in thesubtidal stations. The lowest meiofaunal density was recorded in winter, whereas thehighest density was shown in spring. Comparing with another previous work at thesame area, data from this study does not statistically shown differences with resultsbefore discharge of shiwha lake water.