동물플랑크톤에 대한 지속성 유기오염물질 PAHs와 TBT의 독성 및 생존능력에 미치는 영향

Abstract

We conducted three experiments to estimate the toxicity of POPs(persistentorganic pollutants) on two copepod species ( Acartia erythraea and A. omorii ) andArtemia sp.; (1) 48 h-LC50 of A. omorii with the five PAHs [polycyclic aromatic hydro-carbons anthracene, benzo[a]pyrene, fluoranthene, phenanthrene, pyrene] which wereoften detected in the Gwangyang Bay, (2) toxicity of benzo[a]pyrene and TBT onArtemia in different temperatures (10 C, 15C, 20C), (3) effects of benzo[a]pyrene andTBT on egg production rate, hatching rate and fecal pellet production of two copepodspecies( A. erythraea and A. omorii ) fed on Heterocapsa triquetra (dinoflagellate) exposedin benzo[a]pyrene. Toxic chemicals which were most effective to A. omorii were fluo-ranthene (48 h -LC50 19.20 g L-1) and benzo[a]pyrene (48 h -LC50 29.89 g L-1). The toxi-city of chemicals to Artemia increased when temperature increased. The toxicity ofTBT was about 100 times higher than that of benzo[a]pyrene at 15 C. Food materials(Heterocapsa triquetra ) exposed in benzo[a]pyrene, affected negatively the rate of eggproduction, hatching rate and the fecal pellet production of the copepods at the highconcentration. It is suggested that an increase in the concentration of benzo[a]pyrenemight effect the production of copepods in marine ecosystems. This study suggests thatcopepods may be used as a indicator for early warning of the risk of POPs in marineecosystems.