Micropollutants in aquatic resources have raised global concerns regarding the conservation of ecosystems. Although they are usually found in the environment at trace concentrations to a maximum of several µg/L it is still necessary to address the potential risks these pollutants may represent to organisms. A multi-factor analysis was conducted using two algae as bioindicators. Four different pharmaceuticals were chosen based on their occurrence in domestic wastewaters and persistency after biological treatment processes ranging from 1/8th to four-fold representa-tive environmental concentrations over 96hr exposure. The present multi-factor analysis evaluat-ed cell size, photosynthetic capacity, and growth rate. This data was later combined into a sim-plified single entity: “the index effect”. Results obtained showed even at concentrations below the environmentally relevant concentrations (ERC) the pharmaceuticals residues (PRs) tested caused a cellular behavioral variation in both organisms. Also, the algae cultures’ response to exposure to these stressors was generally dependent on the concentration over time. By examining 4 differ-ent PR over 3 different characteristics of 2 types of algal bioindicators, this work covers signifi-cant and specific responses on the algae exposure cycle. This is unique research since most studies do not consider multiple parameters in the assessment of environment risk for bioindicators.
- algae; Raphidocelis subcapitata; Chlorella vulgaris; pharmaceuticals; micropollutants; ecotoxicity; Multifactorial Approach