1. Unit 6 Day 6
Food Webs in Action

2. Opener
The cattle egret (a bird) forages in pastures and fields among livestock such as cattle and horses, feeding on the insects stirred up by the movement of the grazing animals.
Are the egret’s benefiting? Being harmed? Or Nothing is happening to them?
Are the grazing animals benefiting? Being harmed? Or Nothing is happening to them?
What type of symbiotic relationship do these animals have?
12 minutes

3. Agenda Go over 3 FRQs from the test Modeling Ecosystem Interactions
Yellowstone Food Web
Predictions: Impact of the Wolf
Testing Predictions
Video
Reading

4. Important Dates May 29th May 31st seniors, you will be tested on
Lab Report Due
Ecosystem Assessment
May 31st seniors, you will be tested on
Blood sugar regulation and Endocrine System
Cancer and the Cell Cycle
Enzyme Structure and Function
The Nerve Cell
May 31st juniors, will take the Oaks Science Test
June 6th junior finals, you will be tested on

5. Questions 1-3

6. Building A Food Web First: Then: MAKE A FOOD WEB You have 15 minutes.
Read the description of each Yellowstone organism
Cut out individual pictures
Organize into Producers and Consumers
Organize Consumers by Trophic Level
Then: MAKE A FOOD WEB
Use arrows to show the DIRECTION of the flow of energy
Make as many connections as possible
Also: look for other types of species interactions:
Symbiosis
Competition
You have 15 minutes.

7. Posters Each group will present their poster to the other groups
Look to see what is similar and different
Then we will move on…

8. Trophic Cascade
When a change at the top or bottom of the food chain moves through the entire food chain
Food web=multiple, intersecting food chains

9. Making Predictions
What would happen if the WOLF was removed from the ecosystem?
What species would be affected?
What would the effect be?
Then, what would happen if the WOLF was re-introduced to the ecosystem?
You have 10 minutes:
Record predictions on a T-Chart on whiteboard

10. “How Wolves Change Rivers”

11. Reading What to do: Read the article Mark the text:
Underline/highlight text that
Margin notes: what species was affected? How? (+/-)
30 minutes