2. Definitions

It has been clear from the outset that bioindication and biomonitoring are promising (and potentially inexpensive) methods for observing the impact of external factors on ecosystems and their development over a long period, or for differentiating one (e.g. unpolluted) site from another (polluted) . The enthusiasm generated by the development of these methods has resulted in a problem that remains unresolved: the definitions of bioindication and biomonitoring, respectively,...