Using heavy metal bioaccumulation in commercially available fish species to assess the heavy metal levels in a freshwater system in Sri Lanka and to see whether dragonfly abundance, diversity and species composition act as good heavy metal bioindicat

1. Introduction 2. Background and Literature Review 2.1 Heavy Metals in Freshwater Systems 2.2 Bioaccumulation in Fish Species 2.3 Dragonflies as Bioindicators 3. Study Area 3.1 Geographic Location 3.2 Climate and Hydrology 3.3 Biodiversity Overview 4. Methodology 4.1 Sample Collection 4.2 Heavy Metal Analysis Techniques 4.3 Statistical Analysis Methods 4.4 Ethical Considerations 5. Results 5.1 Heavy Metal Levels in Fish 5.2 Dragonfly Diversity and Composition 5.3 Correlation Analysis 6. Discussion 6.1 Interpretation of Results 6.2 Comparison with Previous Studies 6.3 Limitations and Assumptions 7. Conclusion 7.1 Summary of Key Findings 7.2 Implications for Freshwater Management 7.3 Recommendations for Future Research 8. Appendix 8.1 Supplementary Data 8.2 Glossary of Terms 8.3 Methodological Details