1. Do now activity
Choose a symbiotic relationship and explain how it is a positive/negative relationship?
Explain how an organism’s niche relates to its trophic level (placement in the food chain).
What is the difference between biotic and abiotic?
What is the difference between primary and secondary succession?

2. Do now activity What is the Competition Exclusion Principle?
Give 5 examples of abiotic factors that can be found in the ocean.
Give 5 examples of biotic factors that can be found in the desert.
Choose an animal and explain its niche (example: zebra).

3. Section 9-1: niche & symbiosis
Essential Question:
Why is one organism’s niche important to the entire community?
Learning Target
Determine the importance of an organism’s niches in maintaining the stability of a community.
Evaluate the group behavior of organisms and how these behaviors impact their chance of survival as individuals and species’.
Section 9-1: niche & symbiosis

4. announcements Biology Tutoring this week: Lunch B (Tuesday & Thursday)
7:00AM (Monday – Friday)
After school Biology Tutoring: Tuesday
Section 8 Quiz Retakes are available until 4/14/17.
1-Pagers due this Friday!

5. announcements
Available Extra Credit:
3 Tissue Box = 1 Class Pass

6. Don’t forget to chunk your notes!

7. Biotic: living things in an ecosystem that can influence an organism
Example: Plankton
Algae (what Plankton eats)
Shrimp (what eats Plankton)
Other fish that live in the same ecosystem
overview

8. Abiotic: non-living factors of an environment
overview
Abiotic: non-living factors of an environment
Example: Plankton
Water
Sand
Rocks
Climate

9. overview
Habitat (ecosystem): an area where an organism lives that includes both abiotic and biotic factors.

10. A niche is a role or job of an organism in the ecosystem.
Examples
What it eats
What eats it
Necessary abiotic factors
How it reproduces
niche

11. Competition happens when niches overlap

12. niche
Competition Exclusion Principle: no two species can occupy the same niche in the same habitat at the same time.

13. When 2 different species live closely together
symbiosis
When 2 different species live closely together

14. There are 3 types of symbiosis interactions

15. Mutualism: both species benefit from the relationship
symbiosis
Mutualism: both species benefit from the relationship

16. symbiosis
Commensalism: One species benefits the other is neither helped or harmed.

17. symbiosis
Parasitism: One species gets all or most of its nutrients from another species.

18. Ectoparasites – live on the outside
symbiosis
Ectoparasites – live on the outside

19. Endoparasites – live on the inside
symbiosis
Endoparasites – live on the inside

20. Section 9-1: niche & symbiosis
Essential Question:
Why is one organism’s niche important to the entire community?
Learning Target
Determine the importance of an organism’s niches in maintaining the stability of a community.
Evaluate the group behavior of organisms and how these behaviors impact their chance of survival as individuals and species’.
Section 9-1: niche & symbiosis