강릉 남대천 하구역의 1997년 9월중 대형저서동물의 분포패턴
Notes on the Benthic Macrofauna During September 1997 Namdaecheon Estuary, Gangneung, Korea
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Abstract
- We examined estuarine macrobenthos in Namdaecheon estuary, Gang-neung, Korea, September 22, 1997. A total of 56 species were found together with anabundance of 378individuals m-2 and a biomass of 20.79gWWt m-2. The major dominantspecies were unidentified oligochaete followed by different species of polychaetesHediste japonica, Rhynchospio glutaea, Poecilochaetus trilobatus, Scoloplos armiger,Spiophanes bombyx and a talitrid amphipod Platorchestia crassicornis . The study areawas divided into two different groups of stations and species, based on the q-mode andr-mode clustering analysis. In case of q -mode, there are two groups: one is a marinestation group and the other is estuarine group. The r -mode clustering analysis showedthe two main communities as follows; 1) Marine species group occurred only at station7, 8 and 9 and 2) Estuarine species group composed of the species present at station 1to 6 and 10 to 15. In the number of species, the estuarine station group includes 13species, whereas 43 species were presented in the marine station group. Totalmacrofaunal abundance and total biomass were higher in the marine station groupthan those in the estuarine group. The species diversity index was also high in themarine group( ¤ 2), whereas it was less than ca. 1 in the estuarine group.
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