저서생물지수를 이용한 마산만의 다모류군집 건강성 평가

Abstract

In this study, we evaluated the benthic polychaetous community health using three biotic indices (BPI, AMBI, B-IBI) in Masan Bay. We collected macrozoobenthos monthly using van Veen grab (0.1 m2) at 6 stations in Masan Bay from February 2004 to May 2006. Based on the BPI values, two stations in the inner bay were found in a very hard polluted condition and three stations in the middle bay were also in a highly polluted condition. Only one station located in the bay mouth was in a normal condition. The inner bay stations showed very high AMBI values (≥5.0), indicating a highly polluted condition. The bay mouth station was assessed in a moderately polluted condition. The overall B-IBI values in Masan Bay were in the range between 1.6 and 3.0. The lowest B-IBI value was showed at station 5 (B-IBI=1.6). The inner bay stations showed low B-IBI values (≤2.0) in the severely degraded condition. The bay mouth station with high B-IBI value over 3.0 was assessed as a normal condition. All three benthos indices showed that macrozoobenthic communities in the inner bay were in a seriously polluted condition all year round, and macrobenthic faunas in the bay mouth seemed in a bad healthy condition (slightly polluted) based on AMBI during summer season.