Ecology Interactions Unit Competition Theory

1. Ecology Interactions Unit Competition Theory

2. Remember! • Working together, and helping everyone to reach their full potential will benefit everyone in this class. We are all interconnected.

4. Competitive exclusion theory: All organisms exist in competition for available resources.

5. Competitive exclusion theory: All organisms exist in competition for available resources. • Those that create a competitive advantage will flourish at the expense of the less competitive.

6. Competitive exclusion theory: All organisms exist in competition for available resources. • Those that create a competitive advantage will flourish at the expense of the less competitive. • No two organisms can have the same niche.

7. Competitive exclusion theory: All organisms exist in competition for available resources. • Those that create a competitive advantage will flourish at the expense of the less competitive. • No two organisms can have the same niche. • One species thrives,

8. Competitive exclusion theory: All organisms exist in competition for available resources. • Those that create a competitive advantage will flourish at the expense of the less competitive. • No two organisms can have the same niche. • One species thrives, the other goes extinct.

9. Paramecium Species A

10. Paramecium Species A Paramecium Species B

11. Population graphs when grown separately

12. When introduced to the same environment

13. Paramecium species B population declines until extinction.

14. Activity! Competition over resources with the same niche. • See Lab Sheet

15. Activity! Competition over resources with the same niche. • One group is the Spoonbill bird (Spoons)

16. Activity! Competition over resources with the same niche. • One group is the Spoonbill bird (Spoons)

17. Activity! Competition over resources with the same niche. • One group is the Spoonbill bird (Spoons) • One group is the Grabberbill bird. • (Clothes Pins)

18. Activity! Competition over resources with the same niche. • One group is the Spoonbill bird (Spoons) • One group is the Grabberbill bird. • (One finger and thumb or test tube holders) • Each group will compete for seeds.

19. Set-up of simulation

20. Explain Lab….

21. Questions to be answered in journal • How did this activity show interspecific competition? • Hint! - (Inter = Between the different species)

22. Questions to be answered in journal • How did this activity show interspecific competition? • Hint! - (Inter = Between the different species) • Answer: The Grabberbills and Spoonbills are both different species competing for the same resources.

23. Questions to be answered in journal How did this activity show intraspecific competition?

24. Questions to be answered in journal How did this activity show intraspecific competition? Answer: Intraspecific competition occurred as you competed with members of your species for resources.

25. Questions to be answered in journal • Which bird species was better adapted to eat the seeds? Grabber

26. Questions to be answered in journal • Which bird species was better adapted to eat the seeds? • Answer! The Grabberbills were better suited to collect the round seeds and hold on to them. Grabber

27. Questions to be answered in journal What happened to the species less adapted to eat the seeds over time?

28. Questions to be answered in journal What happened to the species less adapted to eat the seeds over time? Answer! The species slowly began to decrease in population. This occurred because no two species can occupy the same niche. They will eventually go extinct.

29. Theory

30. Theory Different Same Chasing away