2. Which of the organisms in the above diagram represents the Tertiary Consumer?

3. Use the diagram on the right to answer the following questions: Who is the producer in this food web? Algae

4. How many different food chains involve Squid? 6

5. What are they? algae  small animals  squid  elephant seal  killer whale algae  squid  killer whale algae  squid  leopard seal  killer whale algae  small animals  squid  elephant seal  leopard seal  killer whale algae  small animals  squid  killer whale algae  small animals  squid  leopard seal  killer whale

6. Each organism in a food chain represents a feeding step, or Tropic Level, in the passage of energy and materials

8. Copy the ecological pyramid of energy you created into your biology notebook.

10. Ecologists often illustrate the flow of energy through ecosystems with an energy pyramid. Much of the energy obtained from food (90%) is used for metabolism or lost to the environment in the form of heat. Only Only about 10% of the energy at any tropic about 10% of the energy at any tropic level is transferred to the next tropic level is transferred to the next tropic level. level.

13. In the diagram above, which organisms are considered primary consumers

14. In the diagram above, which organisms are considered secondary consumers

15. Which organisms are considered both secondary and tertiary consumers?

16. Using what we know about energy, how much energy would be available to the leopard seal using this food chain if algae begins with 250,000 units? 250 250,000 25,000 2,500 250 What about the killer whale? 25 25

17. What percentage (%) of energy is available at each trophic level in the above diagram?

18. In your notebook answer the following questions... Explain the 10% rule of an ecosystem using the information from the ecological pyramid and the glossary. Which example, a food chain or a food web, represents a more realistic picture of the flow of matter and energy in an ecosystem? Support your answer.