1. (Relationships in the Environment)
SSA Review – 12
Interdependence
(Relationships in the Environment)

2. Ecosystem
*a community of living organisms (biotic) in conjunction with the nonliving (abiotic) components of their environment (things like air, water, and soil), interacting as a system.

3. Community
*A group of interacting populations of organisms within an ecosystem

4. Population
*All the species of an organism in an ecosystem

5. Habitat
*An area within an ecosystem where a species lives

6. Niche
*The role a species plays within an ecosystem

8. Symbiosis
*Interaction between two different organisms living in close physical association

9. Competition
*Organisms competing for limited resources (food, water, shelter, mates) in an ecosystem

10. Competition
*Organisms competing for limited resources (food, water, shelter, mates) in an ecosystem

11. Predation
*An organism that hunts (preys) another organism for its food

12. Mutualism
*Two organisms (different species) work together to the benefit of both

13. Commensalism
*One organism is benefitted while the other organism is unharmed

14. Parasitism
*An animal that gets its nutrients from taking nutrients from other animals (mosquitoes, fleas, ticks, tapeworms)
*one is benefitted, the other is harmed

15. Food Chain Food Web
Flow of nutrients from All of the different flow one organism to of nutrients in an
another in an ecosystem ecosystem

16. Energy Pyramid

17. Limiting Factors
*Conditions in an environment that cause a population of organisms to increase or decrease
*Availability of food, water, shelter
*Competition for limited resources
*Predation
*Change in climate
*Diseases