Name: ______________Date: __________

Block: _____Biomagnification in a Terrestrial Ecosystem: http://goo.gl/0En7Bc

Organism Trophic Level Concentration of DDT (parts per million)

Harmful to the Organism? (Yes/No)

Wheat Producer 0.000 003 NoMouse Primary Consumer 0.04 NoWeasel Secondary Consumer 0.5 NoHawk Tertiary Consumer 2 Yes

Explain how biomagnification occurs in this ecosystem:- increase in concentration of a pollutant from one link in a food chain to another

Biomagnification in an Aquatic Ecosystemhttp:// goo .gl/I4tqTw

1. Where are the sources of mercury? Give one natural source and one human source.- Enter our world through volcanic activity and natural erosion - Large quantities through coal-burning industries

2. How does the mercury get into the oceans or land? Be specific.- When coal is burned, it released into the air and falls back to earth in some form of

precipitation or dust- Certain types of bacteria convert mercury into methyl mercury (most dangerous form)

3. In the ocean ecosystem, how does the mercury enter the food chain?- Tiny marine creatures eat methyl mercury, this creates a chain rxn throughout the food

chain4. How does biomagnification occur in the aquatic ecosystem? ** notice in the video it says

bioaccumulation, but this is in fact biomagnification**- As trophic levels increase, so does mercury concentration = biomagnification

5. Briefly describe the study the scientists are completing. Be sure to state what organism they are studying and the process by which they are completing the study.- Small samples of muscle tissue taken