1. What types of pollution exist in our water?

4. Pathogens Disease causing organisms such as bacteria, viruses, protozoa and parasitic worms

5. Don't Drink the Water!!!

6. Organic Matter: Where did they come from?

7. Agricultural Run-off

8. Nutrients/Organic Matter  Eutrophication

9. 1. What causes Eutrophication? 2. What can you do to prevent eutrophication?

11. Acid Rain

12. Salting Roads

13. Thermal Pollution Changed dissolved oxygen Alters distribution of organisms among major and minor communities. Death of some types of animals Changes to reproductive powers and increased susceptibility to disease Changes in migration time and pattern may be affected. Decrease in productivity of the water body. Economic and environmental damage

14. Toxic Substances - Cadmium From Mining From Burning Fossil Fuels From Leaking Batteries Known Carcinogen

15. Toxic Substances - Lead Corrosion of household plumbing systems Short term exposure: Gastrointestinal distress Long term exposure: Liver or kidney damage

16. Toxic Substances - PCBs http://www.youtube.com/watch?v=AlWLBRQ o278 http://www.youtube.com/watch?v=AlWLBRQ o278

17. Toxic Substances – Agent Orange Used as an herbicide in Vietnam– military strategy Killed hundreds of thousands of Vietnamese people Caused major birth defects in hundreds of thousands of Vietnamese children Biomagnifies through the food chain Carcinogenic

19. Toxic Substances - Mercury

21. Link to Eating Mercury Safe Fish Pocket Guides by Region Link to Eating Mercury Safe Fish Pocket Guides by Region

22. Toxic Substances - DDT Pesticide used largely in 40’s and 50’s to kill insects that carried diseases like Typhus and Malaria (efforts were unsuccessful) Health Effects exposed in Rachel Carson’s “Silent Spring” – helped lead to its ban in 1972

23. Toxic Substances - DDT Biomagnifies - putting top predators most at risk (especially predatory birds) Thins shells of birds Linked to decline of Bald Eagle, Brown Pelican, Peregrine Falcon and Osprey Also linked to reproductive problems and endocrine problems in humans http://youtu.be/-UiCSvQvVys http://youtu.be/MMSEnIVFBQ0

24. Bioaccumulation vs. Biomagnification Bioaccumulation – The process of toxins building up in an organism over time through absorption or ingestion Biomagnification – The increase in concentration of a toxin as it moves up the food chain – Lower trophic levels have LOW levels – Highest trophic level would have HIGHEST levels

25. How are “biomagnification” and “bioaccumulation” connected to human health? - discuss with a partner and come up with one example

26. 1. List three categories of pollutants found in our freshwater resources. 2. What is the difference between biomagnification and bioaccumulation? 3. How are point and non-point source pollution connected to biomagnification and bioaccumulation? Wrapping Up…

27. Great Blue Heron Fluke Sheepshead Minnow Sea Lettuce