넓미역(Undariopsis peterseniana)과 대황(Eisenia bicyclis)의 초기 생활사에 미치는 pH 및 염분 영향

Abstract

It is insufficient to investigate ecophysiological response in the early life cycle of two brown alge, Undariopsis peterseniana and Ecklonia bicyclis exposed on environmental stress such as various pH ad salinities. Marine ecotoxicological assessment of U. peterseniana and E. bicyclis, which have different habitats was conducted to identify the effects of pH and salinity on the early life cycle. 48 hours of pH and salinity germination revealed linear concentration-response relationship from treatment groups. Germination of U. peterseniana and E. bicyclis zoospores exposed to pH was decreased rapidly at concentrations lower than pH 5.5 for 48 hours. Test organisms exposed to salinity germinated rapidly at a concentration higher than 15.0 psu. And the number of germinated individuals and germination was relatively low at lower than 15.0 psu. These results can be interpreted as exceeding the tolerance range in which normal metabolism can be performed in the case of U. peterseniana and E. bicyclis at concentrations below pH 5.5 and 15.0 psu. In conclusion, it can be predicted that the tolerance of U. peterseniana and E. bicyclis to environmental stress such as pH or salinity varies somewhat depending on habitat depth, freshwater inflow from land, or stress intensity.