1. ECOSYSTEMS and COMMUNITIES

2. COMMUNITY INTERACTIONS
Competition
Compete for resources in order to survive
Predation
Predator and prey relationship
Symbiosis
Three kinds:
Mutualism
Commensalism
Parasitism

3. PREDATION Predator—does the killing
Hawk
Prey—the organism that is being eaten
Mouse

4. MUTUALISM “mutual” means “both benefits” or “reciprocal relationship”
Mutualism—both benefit, neither are hurt
Example:
Flowers and bees
Flowers and bees both benefit: Flowers are pollinated by bees; bees receive nectar that flowers produced. Neither are hurt in this process

5. Mutualism

6. COMMENSALISM One organism benefits
The other is NOT harmed and does NOT benefit
Example:
Barnacles on a whale
Barnacles grow and receive nutrients while on the whale. The whale is not harmed and does not benefit from the barnacles.

7. Commensalism

8. PARASITISM One organism benefits The other is harmed Example:
Tapeworms, fleas, ticks
Animal is harmed. The tapeworm, flea, or tick benefits, receiving nutrients from animal’s body.

9. Parasitism

10. Videos Mutualism http://www.youtube.com/watch?v=uxVMeLWzB_o