QSAR-Based Estimation of Species Sensitivity Distribution Parameters: An Exploratory Investigation.

ABSTRACT: Ecological risk assessments are hampered by limited availability of ecotoxicity data. The present study aimed to explore the possibility of deriving species sensitivity distribution (SSD) parameters for nontested compounds, based on simple physicochemical characteristics, known SSDs for data-rich compounds, and a quantitative structure-activity relationship (QSAR)-type approach. The median toxicity of a data-poor chemical for species assemblages significantly varies with values of the physicochemical descriptors, especially when based on high-quality SSD data (from either acute median effect concentrations or chronic no-observed-effect concentrations). Beyond exploratory uses, we discuss how the precision of QSAR-based SSDs can be improved to construct models that accurately predict the SS

SUBMITTER: Hoondert RPJ 

PROVIDER: S-EPMC6900027 | biostudies-literature | 2019 Dec

REPOSITORIES: biostudies-literature