1. Biodiversity The variety of species living within an ecosystem
What is an ecosystem?

2. Ecosystems
Ecosystems consist of a given area’s physical features (_____ factors) and organisms (______ factors)
Organisms that live together in an ecosystem are called a __________

3. Population What is a population?
A group of organisms that all belong to the same species and live in a given area

4. Cause and Effect Scenario #1:
A big boat that carries oil from Saudi Arabia to the United States hits a rock near the coast of Redondo Beach and spills a million barrels of oil into the ocean. How does this impact the environment?
Scenario #2:
You and your friend went camping in Yosemite and accidentally started a forest fire that burnt down a square mile of trees. How does this impact the environment?

5. When you alter an environment in any way, you alter everything that is somehow attached. Everything in an ecosystem is connected!

6. Producers & Consumers
Sheep
Shrimp

7. important for a healthy
Decomposers
Which one is a decomposer?
Why are decomposers
important for a healthy
ecosystem?
The Earth would be one big pile
of dead things!

8. Food chain
Animals and plants are connected through simple relationships called food chains.
Can you describe a food chain that you fit into?
Are humans ever in the middle or bottom of a food chain?
Consumer
Consumer
Consumer
Consumer

9. Mr. Haas’ Food Chain Shark Consumer The Best Teacher Ever Consumer
Tuna
Consumer
Mr. Haas’
Food Chain
Sardines
Consumer
Plankton
Producer

10. Food Pyramid
(Food Chain)

11. Food Webs
Nature really more like a web, not a chain.

12. Can’t we all just be friends?
Relationships
Can’t we all just be friends?

13. Competition
Two or more organisms compete for a limited resource

14. One species eats the other species
Predation
One species eats the other species
(predator-prey)

15. Symbiosis = living together
Examples:
Commensalism
Mutualism
Parasitism

16. Commensalism
One species benefits and the other species is neither harmed or benefited

18. Mutualism
Both species benefit

19. Parasitism One organism benefits at the expense of the other organism
Crab Parasite
Swimmer’s Itch