List of Abbreviations ........................................... I
Summary ....................................................... III
Chapter 1 General Introduction ................................. 1
Background ................................................... 1
Scope, Aims and Approaches .................................. 13
Chapter 2 Pollution-induced community tolerance as a
diagnostic tool for hazard assessment ....................... 25
Chapter 3 Active bio-monitoring of contamination in aquatic
systems- An in situ translocation experiment applying the
PICT concept ................................................ 63
Chapter 4 Multiple stressors in periphyton - comparison of
observed and predicted responses to high ionic loads and
herbicide exposure .......................................... 97
Chapter 5 General Discussion and Outlook ..................... 133
General Discussion ......................................... 133
Outlook .................................................... 143
Acknowledgement ............................................... 153
Curriculum Vitae .............................................. 155
List of Publications .......................................... 157
Statutory Declaration ......................................... 159
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