1. E FFECTS OF C HANGE

2.  The prairie ecosystem has many populations  Use these organisms to create a food web.  The producers are in green, plant eaters in blue, and animal eaters in orange. TallgrassShortgrass Wildflowers Big Bluestem PronghornBuffalo MicePrairie Dog Black Footed Ferret Prairie Chicken Burrowing Owl Grasshoppers BeetlesSnakes

3. A L OOK AT O VERGRAZING  The next slide will show an overhead view of a prairie.  For this slide we will only focus on the grass and buffalo.  The grass is shown as green squares and the buffalo as black ovals.

4. G RASSLAND Each column has 10 squares of grass. There are 20 columns. Calculate how many squares of grass are available.

5. G RASSLAND Each buffalo needs 25 squares of grass to survive. How many buffalo can live in this area?

6. G RAZING What will happen if we put 20 buffalo in this area?

7. E FFECTS ON OTHER P OPULATIONS What will happen to the grass? Explain your answer.

8. E FFECTS ON OTHER P OPULATIONS What will happen to the ferrets? Explain your answer.

9. H IGHWAYS What effects will building a highway have on the area?