ABSTRACT
The assessment of the ecological quality of natural ecosystems is partly based on chemical criteria, such as the chemical nature and concentrations of pollutants, and physical criteria, such as topography, geology, and hydrology (Carluer and De Marsily 2004; Lagacherie et al. 2006). Even if such a physicochemical approach is essential, it has many limitations (specific information, no predictive information on the ecotoxicological risks associated with contamination) and many constraints from
4.1 Introduction: From the Simple to the Complex ..............................................85 4.2 The PICT Concept in Brief: Principle, Objectives, and Application ..............87 4.3 Selection Process, Detection, and Validation of the PICT Approach ............87
