AP Environmental Science Jacobson

Name:________________________________________

Food Web Activity: Directions: Your group has 26 cards representing organisms we have here on the Corbett Campus. Your job is to read about their feeding habits and arrange them into a possible food web that shows the energy relationships of these organisms to each other. Arrange them on the paper and draw arrows between them showing possible correct relationships (make sure arrows are facing the correct way!). There may be many correct answers. Some things to keep in mind when trying to determine energy relationships: -What time of day are these organisms active? -What type of habitat do they live in? -How big are they? Materials (per group of 4 or 5): 26 organism cards Rubber band Butcher paper Pencil Tape Questions: 1. Name two producers in your food web: 2. Name two omnivores in your food web: 3. Name two primary consumers: 4. Name one possible secondary consumer: 5. Name one decomposer: 6. Name one detritivore:

7. How did the time of day that these organisms are active affect your food web?

8. Describe what would happen to your food web if an invasive species such as Reed Canary Grass came in and killed off all of the willow:

9. Describe what would happen to your food web if red-tailed hawks caught a disease and went extinct:

10. Describe what would happen if fertilizer runoff from a nearby farm caused the phytoplankton to overgrow and shield out most of the light in lower depths of the stream:

11. Let’s say the acorns of the white oak start with 200J of energy. How much is passed from it to the hawk? Explain how you determined your answer.

When you are finished: 1. Please recycle the paper. 2. Put this sheet in the homework box. 3. Take the tape off the cards, put the rubber band back around them and put them back in the white tub.