1. Vocabulary Review Ch 20 Community Ecology

2. A relationship between two species in which one species, the predator, feeds on the other species, the prey Predation

3. A relationship between two species in which both species compete for limited resources such that both species are negatively affected by the relationship Interspecific competition

4. A relationship in which two different organisms live in close association with each other Symbiosis

5. A relationship between two species in which one species, the parasite, benefits from the other species, the host, which is harmed Parasitism

6. A relationship between two species in which both species benefit Mutualism

7. A relationship between two organisms in which one organism benefits and the other is unaffected Commensalism

8. The number of different species in an area or community Species richness

9. A measure of the relative abundance of each species in an ecological community Species evenness

10. A pattern in which the number of species in an area increases as the area increases Species-area effect

11. In ecology, an event that changes a community by removing or destroying organisms or altering resource availabilty Disturbance

12. The tendency of a community to maintain a relatively constant structure Stability

13. A gradual process of change and replacement in a community Ecological succession

14. Succession that begins in an area that previously did not support life Primary succession

15. The process by which one community replaces another community that has been partially or totally destroyed Secondary succession

16. A species that colonizes an uninhabited area and that starts an ecological cycle in which many other species become established Pioneer species

17. A community that, after a process of ecological succession, has reached a generally stable state Climax community