2. AP Biology  video video

3. AP Biology Community Ecology

4. AP Biology Community Ecology  Community  all the organisms that live together in a place  interactions  Community Ecology  study of interactions among all populations in a common environment To answer: In what way do these populations interact? To answer: In what way do these populations interact?

5. AP Biology Fundamental niches Realized niches High tide Low tide Species 1 Species 2 Niche & Habitat  ECOLOGICAL NICHE~ the sum total of an organism’s use of biotic and abiotic resources in its environment; its “ecological role” Chthamalus sp. Semibalanus sp.  Habitat- is an area where an organism lives.

6. AP Biology Interspecific interactions  Community interactions  parasitism (-/+)  commensalism (+/0)  barnacles attached to whale  mutualism (+/+)  Water buffalo and Egret

7. AP Biology Parasitism  In a parasitic relationship, one organism benefits (parasite) while the other organism is harmed (host)  Examples-fleas, ticks, tapeworm, mosquito

8. AP Biology Commensalism  In commensalism, one organism benefits, while the other is not affected  Examples – spanish moss growing on trees, or barnacles growing on whales  commensalism example commensalism example

9. AP Biology Mutualism  In a mutualistic relationship, BOTH organisms benefit  Examples – lichen (algae and fungus), pollinators (insects, bats, birds, etc)  Mutualism video Mutualism video

10. AP Biology Symbiotic Interactions  Symbiosis is a close ecological relationship between the individuals of two (or more) different species. Types of Symbiosis Description CommensalismRelationship in which one organism benefits, but the other in neither helped nor harmed ParasitismRelationship in which one organism benefits and the other is harmed in some way MutualismRelationship in which both organisms benefit

11. AP Biology commensalism Parasitism Symbiosis mutualism+/+ +/- Commensalism +/0

12. AP Biology What relationship is this?

13. AP Biology Activity – Community Interactions  Groups of three  Answer the questions  Symbiotic interactions include:  Commensalism  Mutualism  Parasitism  Be prepared to share 15 minutes

14. AP Biology RECAP!!  I will give you three separate answers and you must give me a QUESTION that fits the answer. A close ecological relationship between the individuals of two (or more) different species. A mosquito biting into a human’s arm Relationship in which one organism benefits, but the other is neither helped nor harmed