1. A Changing Ecosystem Do Now:
The absence of the wolves in Yellowstone National Park severely impacted the ecosystem. Many changes occurred from the loss of this predator.
The wolves are considered a keystone species. How would you define a keystone species?
Keystone species is a species that has a disproportionally large effect on its environment
Compared to its relative abundance. When a keystone species is removed from a system,
The ecosystem may change drastically, even if the species removed was a small part of the
Ecosystem.
A Changing Ecosystem

2. Predator-Prey Simulation Lab: A Close Look at the relationship between predator and Prey
Simulate the interactions between a predator population of foxes and a prey population of rabbits
Organize data in table and graph format
Compare simulation data to data taken from nature, and reflect upon lab procedure and nature

3. Meet the individuals of each population
Predator – Fox Prey – Rabbit Habitat - Meadow

4. Questions to Ponder during the lab…
What effect does the available food source have on population?
What influence will the prey population have on the predator population? Vice versa?
Can you see a pattern occurring between the predator and prey population?
Do the lab….

5. Assumptions Rabbit About the…. Fox
Must capture 3 rabbits to survive Produce 1 offspring for every three rabbits capture A fox only immigrates if none left in meadow
Captured ones die Surviving ones reproduce and double Meadow carrying capacity is 100
Assumptions

6. Refer to lab when in doubt
Important notes
Determine fox survival and reproduction using individual fox capture numbers.
As population builds, it is important to tally each fox’s kills, removing captured rabbits after each fox is tossed.
If fox captures 7 rabbits, three foxes enter next generation, original fox and two offspring for that one fox.
Refer to lab when in doubt

7. Finishing the Simulation
Continue following the lab procedure and complete the number of generations as set by your teacher.
Each group must submit the data tables to me with each person’s first and last name on it. Also, indicate the period to which you belong. Place in wire basket.
Now split your group into two groups of two. If you are a group of three, remain a group of three. Obtain an index cared. On the top line of the index card, write the your name and your partner’s name (first and last name). Give the card to your teacher.
Begin assigned work.
Homework: Be sure to know your password to log into a chrome book tomorrow.

8. Post lab with the Group
Using Google Sheets
1. Create a line graph showing the two populations over time.
Answer questions about the data
Drop the Google Sheet with graph and the Google Doc
with answers to question in Honors Biology folder.
4. Be sure graph and doc are shared with all members

9. Is the part of an oscillation?
Can you find this graph within the predator prey simulation and Nature graphs?
Is the part of an oscillation?

10. Predator-Prey Relationship in Nature
Oscillation Traits:
Repetitive variation
Relating to time
Regular intervals
Oscillating growth can describe predator-prey relationship.
Each population has this pattern.
How are they related?

11. 2. Refer to the Predator-Prey Simulation Line Graph to answer the following: a. Describe what happens to the rabbit population over time. b. Describe what happens to the fox population over time. c. How did both of these populations influence each other? d. What would have happened if a whole family of foxes immigrated into the ecosystem at Generation 2? e. Make a prediction about what would happen to both your predator and prey populations if a new predator is added to the system? Explain any new types of relationships established. 3. Refer to the Predator-Prey Line Graph of Nature to answer the following: a. How does the predator population vary when they prey numbers change? b. Are the populations in phase with each other for most of the time? Explain. 4. Refer to both Predator-Prey Line Graphs to answer the following: a. Which graph best illustrates a predator-prey relationship that is least influenced by other factors in the ecosystem? Support your answer. b. Explain how the simulation models a real ecosystem. Explain how you could change the lab procedure to make it more realistic.
Post Lab Questions

13. Simulation 1

14. Simulation 2

15. Simulation 3

16. Simulation 4

17. Simulation 5

18. Simulation 6

19. Where is Isle Royale National Park?
Wolves and Moose of Isle Royale National Park
Wolves Attacking a Moose

20. Listen and write down facts…
How the wolves gets to Isle Royale…
What decrease moose population? Specific biotic or abiotic factor…
Any biotic or abiotic factors that affects moose, wolves…
Describe abiotic factors which influence the community…

21. A Bit of Info about the Wolves and the Moose
For over 50 years researchers from Michigan Technological University have been studying the relationship between wolves and moose on Isle Royale, located in the middle of Lake Superior. This long term study continues to surprise us with new discoveries on how the natural world works. Hear the latest news from Assistant Professor John Vucetich, and learn more about why the fate of Isle Royale wolves may be in jeopardy.
Wolf-Moose Relations Study
The Wolves and Moose of Royale Island

22. Can you place these words on the Graph
Can you place these words on the Graph? Explanation must reference both populations.
Density-Dependent Effect
Density-Independent Effect
Exponential growth
Intraspecific competition
Predation
Interspecific Competition
Answer should contain years
and a specific reason! Use the rubric!

23. Studying for the Lab TEst
Lab Test: Monday, 10/31/16
Reread the background info on the lab
Review the data table and the line graph
Review questions and discussion notes
Review power point
Practice reading graphs