1. Community Targets #12-15 12. I can define communities.
13. I can define an organism’s niche.
14 I can define habitat.
15. I can explain how changes in a habitat can affect the biodiversity of an ecosystem.

2. Communities All the living things living in an area

3. a clown fish’s habitat is in a sea anemone
Habitat: all biotic & abiotic factors in the area where something lives
Example
a clown fish’s habitat is in a sea anemone

4. Changes to habitat often reduce biodiversity
Example
climate change is destroying coral reefs

5. Niche: the role of an organism in it’s community
Example
A tree-dwelling animal that eats eucalyptus leaves.

6. every species has a specific position in it’s community
many species may occupy the same habitat but the niches of those species differ to avoid competition

7. Relationships in Communities
Symbiosis: long-term relationship between 2 or more species in a community
3 types of symbiosis: mutualism, commensalism, & parasitism

8. Mutualism A relationship is which both species benefit + +
+ +
Example: Oxpecker bird & gazelle

10. Example: Barnacles on a whale
Commensalism
A relationship in which one species benefits and the other is NOT affected
+ 0
Example: Barnacles on a whale

11. Parasitism
A relationship in which one species benefits and the other is harmed
+ --
Example: Mosquito and human