탄도만 갯벌의 저서동물 군집

Macrobenthic communities on the tidal flats in Tando bay on the west coast of Korea

The present study was performed to obtain ecological information about the tidal flats in Tando Bay on the west coast of Korea. Macrobenthic communities were studied at 16 stations and 2 transects on the Tando tidal flats, during June 2003. 14 sampling stations with an 100 m (GY line) or 200 m (SH line) interval were chosen in each tidal flat transect. Duplicate macrobenthos samples were collected using a can corer (10×25 ㎝) at each station during the study period. Total number of species in Tando tidal flats were 88 species, with a mean density of 6282 ind./㎡. There were 43 species of polychaetes (48.9%), 22 species of molluscs (25%), 19 species of crustaceans (21.6%), in Tando tidal flat. Molluscs were represented as a dominant faunal group in Tando tidal flat with a mean density of 4991 ind./㎡, comprising 79.5% of the total benthic animals. This result is because of Molluscs, Musculus senhausia appeared almost quite plentifully from all station. Major dominant species in the Tando tidal flat were Molluscs Musculus senhausia, Laternula anatina, Crustaceans Amphipoda spp., Ilyoplax dentimerosa, Polychaetes Lagis bocki, Cirriformia tentaculata, Heteromastus filiformis, Glycera chirori, Lumbrineris longifolia whose mean densities were 4783, 66, 215, 111, 146, 91, 100, 78, 64 ind./㎡, respectively. Cluster analysis based on the faunal composition showed that Tando tidal flat could be divided into two station groups.