1. V. Food Chains vs. Food Webs

2. A. Food Chains
1. Transfer of food between trophic levels in an ecosystem
a. Producer 1 consumer  2 consumer decomposers
2. Very simple
3. Every organism relies on one organism below it for its energy

4. B. Food Web
1. Network of food chains representing the feeding relationships among the organisms in an ecosystem
2. Very complex
3. One organism relies on several organisms to supply it with energy

5. 4. Changes in a food web can affect. many populations and even cause
4. Changes in a food web can affect many populations and even cause permanent injuries
5. How does the elimination of the sea otter cause damage to the fishing industry?