Bioaccumulation Worksheet

Bioaccumulation Worksheet Read Section 2.3 "Effects of Bioaccumulation on Ecosystems" (Pages 92-99) in your textbook and answer the following questions. 1. What are amphibians and how are they useful to scientists?

2. List all the causes of amphibian species loss.

3. What are pesticides?

4. Why do some synthetic and organic chemicals build up in the environment?

5. What is bioaccumulation?

6. A chemical will accumulate in an organism if it is taken up and stored __________________ than it is _________________________ and excreted.

7. List 3 ways chemicals can enter organisms.

8. Synthetic and organic chemicals can affect the __________________, ____________________, and _________________________________________ of animals.

9. What are keystone species?

10. Name a keystone species in many BC forest ecosystems. _____________________ How is this species important to the plant and animals in the ecosystem and how can they transfer harmful chemicals to other organisms?

11. What is biomagnification and how is it different from bioaccumulation?

12. What are PCBs and what were they used for?

13. How long will PCBs interfere with the reproductive success of BC's resident orca whales?

14. When an orca eats 5kg of salmon, it is ingesting the PCBs and other pollutants from about ____________kg of microscopic plants and algae.

15. When salmon stocks are low, why are orca's more susceptible to PCB poisoning and disease?

16. What does POP stand for and what are they?

17. What was DDT used for? 18. Complete the table on the right, showing

bioaccumulation of DDT in a food chain. 19. What does ppm mean?

20. What are heavy metals?

Consumer

Plankton Minnow Adult fish Heron Osprey Cormorant

Bioaccumulation (ppm)

21. List 3 heavy metals and for each one indicate the sources, safe levels (if mentioned), and harmful effects.

22. Explain how lead-contaminated soil can be treated to reduce the harmful effects of the lead. 23. What is bioremediation? 24. How does the oil industry use bioremediation?

 ................
................

In order to avoid copyright disputes, this page is only a partial summary.

Google Online Preview   Download