아산만 중부해역에 서식하는 대형저서동물의 군집구조 및 저서 건강도 평가

Abstract

Abstract This study was carried out to investigate the spatial distributions of the macrobenthic communities and ecological quality in the central Asan Bay from March to November 2014. In total, 78 species was found the mean abundance was 439 inds./㎡, Biomass was 17.28 gWWt/㎡. Based on the Le Bris (1988) index, there were 10 dominant species accounting for approximately 63% of total individuals. The major dominant species were Heteromastus filiformis, Theora fragilis, Sternaspis scutata, Paralacydonia paradoxa and Chaetozone setosa. Cluster and nMDS ordination analysis based on Bray-Curtis similarity identified 3 major station groups. BPI and AMBI analysis, it was found that the overall good status. These results showed that changes in sedimentary characteristics were the main factors behind spatial and temporal changes in the macrobenthic communities of the central area in Asan Bay