Seats : period 1

1. Seats: period1

2. Seats: period 5

3. Passport 4 minutes! test reminders “Education is our passport to the future, for tomorrow belongs to the people who prepare for it today.” Write in scores & draw bars for exit tickets 7.1 & 7.2 & clean-up supplies for your catalyst stamp! 3 Take your score & divide it by 4 3 ÷ 4 = 0.75 Take your answer & multiply it by 100 0.75 x 100 = 75

4. ET Shout Out! 1 95% BIG goal = 80%

5. ET Shout Out! 1 70% BIG goal = 80%

6. ET Shout Out! 5 92% BIG goal = 80%

7. ET Shout Out! 5 81% BIG goal = 80%

8. 100.B • 1: Raise a hand • 1: Demonstrate North Star traits • Problem solver • Goal driven • 3: 100% seated before the bell • 3: “Ready for your attention” • 3: Lab / activity clean up • 5: 100% on task during practice • 5: 80% exit ticket average Headphones on Friday!

9. 100.B love it or hate it! hot seat ! head phones ! hot seat ! music ! hot seat ! head phones ! head phones ! head phones !

10. unit 7: ecology

11. Objectives • Agenda • Passport 5 • Quick Check! 5 • Limiting Factors Intro 5 • Independent Practice 10 • Group Practice 10 • Independent Practice 10 • Exit Ticket 5 • We are learning to… • explain how birth, death, immigration, and emigration influence population size • We will be successful when we can… • explain how populations grow using both exponential and logistic growth patterns science genius!

12. Quick Check! • Which population is decreasing in size between year 0 and 16? • Which population is increasing in size between year 13 and 16?   • Which population does not change significantly between year 0 and 16?   • In which population was birth rate greater than death rate from year 8 to 12? • In which population was immigration less common than emigration from year 4 to 8?

13. Exit Ticket 4 minutes! 4 minutes! Graph 2 • You may use your assignments! • You must work quietly & independently. • Talking will NOT be tolerated. Graph 1 BIG goal = 80% 0

14. Test Score WARS Period 1 77% Period 5 84% corrections due FRIDAY! Andre ! Melody!

15. Limiting Factors Limiting Factor = something that prevents apopulationfrom growing exponentially What is preventing the human population from growing infinitely big?

16. Yellow Perch Explain the difference between density independent and density dependent limiting factors: • Density dependent factors are limiting factors only affect populations when they reach a specific density. • Density independent factors that affect all populations regardless of their densities.

17. Yellow Perch Density independent limiting factors • depth of Lake Winnipeg (affects amount of sunlight in water, and space available in lake) • temperature of water (affects which fish will live in the lake) • turbidity of water (affects which fish will live in the lake) • migration of yellow perch (depends on which fish are strong enough to travel) • eyes (helps yellow perch to hide from predators and hunt for prey) • drought (natural disasters affect water temperature, levels and turbidity)

18. Yellow Perch Density dependent limiting factors • stunting (due to lack of food or over-abundant population of yellow perch, they will stunt their growth instead of dying) • predation (yellow perch are eaten by northern pike and walleye) • parasitism (chestnut lampreys attach to yellow perch and feed of body fluids) • competition (rainbow smelt compete for space and food) • crowding (rainbow smelt crowd yellow perch)

19. DD or DI? a. Rainbow smelt and yellow perch attempt to occupy the same area. The more aggressive smelt survive; the perch do not. DD - competition between species only occurs at certain densities

20. DD or DI? b. A severe flood brings a lot of sediment and silt into Lake Winnipeg. The turbidity of the lake increases greatly. DI - natural disasters affect all populations regardless of density

21. DD or DI? c. A drought decreases the water level in Lake Winnipeg. The carrying capacity of the lake decreases. DI - natural disasters affect all populations regardless of density

22. DD or DI? d. Due to the introduction of rainbow smelt, Lake Winnipeg becomes crowded and some fish species do not survive. DD - crowding only occurs at certain densities

23. DD or DI? e. Since northern pike prey on yellow perch, an increase in the perch population causes an increase in the pike population. DD - predation only occurs at certain densities

24. DD or DI? f. Many fish die due to an increase in water temperature. DI - temperature affects all population densities

25. DD or DI? g. Due to over-fishing, the number of walleye in Lake Winnipeg decreases. DI - human activities affect all population densities

26. DD or DI? h. A population is growing quickly when parasites cause disease to spread quickly. DD - parasitism only affects certain population densities

27. DD or DI? i. Since lake sturgeon migrate long distances to spawn, many do not survive the trip. DI - behaviors of organisms affect all population densities

28. Fox Populations Identify three factors that could have caused the overall decrease in the fox population Habitat loss Introduced predator Disease Overhunting Others??

29. Fox Populations Explain, in detail, how each factor you identified in part A would have caused the decrease Habitat loss – By reducing the amount of space the foxes can live in, the competition between the foxes increases Introduced predator – A new predator could have been introduced by humans to the area and it could prey on the foxes Disease – A disease could be introduced to the fox population which is not immune to the disease Overhunting – Humans could overhunt the population causing rapid decrease Others??

30. Fox Populations Identify three factors that could have caused the overall decrease in the fox population Habitat loss – Density independent Introduced predator – Density dependent Disease – Density dependent Overhunting – Density dependent/independent Others??

31. Turn it in  homework due YESTERDAY!