남해안 소리도 연도항 저서다모류군집의 시ㆍ공간적 변화

Temporal and spatial variation of benthic polychaetous community in Yeondo harbor of Sorido, southern coast of Korea

This study was carried out to investigate the temporal variation of the benthic polychaetous community in Yeondo Harbor of Sorido, from August, 1999 to May, 2000. Polychaetes, the most dominant faunal group comprising 85.1% of the total number of benthic macrofauna, collected as a total of 70 species with a mean density of 2,262 ind./m² With the passage of time, the density increased toward the inner bay, and the species number increased toward the outer bay. The most abundant polychaete was Prionospio sp.(16.7%), and followed by Lumbrineris longifolia(16.7%), Chone teres(9.3%),Aricidea sp.(8.9%), Tharys sp.(8.6%) and so on. Comparing with the past studies investigated near Yeondo Harbous, the importance of Magelona japonica, the most dominant species in 1996-1997, decreased with time, but Heteromastus filiformis and Sternaspis scutata appeared as the dominant species in 1998. In the present study, the density of H. filiformis increased, but S. scutata decreased greatly. Prionospio sp., L. Longifolia. C. teres, and Tharyx sp., showing a little densities in past study, occurred as dominant species in present study. The dominance of Prionospio sp., L. longifolia, C. teres, and Tharyx sp. As potential organic pollution indicator species in this study area mean the organic pollution of Yeondo Harbor, due to discharge of waste ship-oil and domestic sewage. And also the benthic ecosystem of Sorido was thought to be varied in the process of long-term succession by the past oil-spill pollution of Sea Prince.