An algorithm to calculate Cλ=1 for population-level ecological risk assessment

摘要

By striking a balance between tractability and ecological relevance, the populationlevel ecological risk assessment (PLERA) is playing an important role for risk management of chemicals, and PLERA entails calculating Cλ=1, the critical concentration whereby the finite population growth rate (λ) is reduced to unity. Here an asymptotic convergence algorithm was put forward to numerically calculate Cλ=1 value using quasi-steady state presumption. This algorithm was compared to the interpolation algorithm with the case study of nonylphenol on Japanese medaka (Oryzias latipes), and the results indicated that the former algorithm outperformed the latter with respect to accuracy, precision and computation time.