Deriving a critical concentration for population-level ecological risk assessment
Ecological risk assessment (ERA) for chemicals has been accentuated for a balance between ecological relevance and operational tractability, and population-level ecological risk assessment (PLERA) is viewed a reasonable compromise. With population persistence risk as assessment risk endpoint, a critical concentration corresponding to a unity finite growth rate of a population, denoted as C=1 has been proposed as a candidate as Predicted-No-Effect-Concentration (PNEC). This paper put forward an asymptotic convergence approach to locate the value of C=1 using quasi-stable state presumption. This approach was compared to the bootstrapped interpolation approach with a case study of nonylphenol on Japanese medaka (Oryzias latipes), and the simulation results suggest that the asymptotic convergence approach is probably more favorable with respects to both computation time and precision. Nonetheless, the asymptotic convergence approach is deemed less feasible for PLERA when seasonal variation is incorporated.
Chemical risk assessment Ecological risk assessment Finite population growthrate Population-level Predicted-No-Effect-Concentration
Y.Meng L.Shi W.Fang P.Shi
Academy of Disaster Reduction and Emergency Management, Ministry of Civil Affairs and Ministry of Ed Key Laboratory of Environmental Change and Natural Disasters, Ministry of Education State Key Laboratory of Earth Surface Processes and Resource Ecology Beijing Normal University, No.19 Xinjiekouwai Str., Beijing 100875, China
国际会议
第八届中日水环境暨NSFC-JST重大国际合作项目成果交流会
苏州
英文
108-118
2008-11-29（万方平台首次上网日期，不代表论文的发表时间）