Ecology Review

1. Species that have been relocated somewhere other than their original habitat and can disrupt the ecosystem.
4. These are living factors in an environment that can affect an organism.
9. The percent of energy that is passed to the next highest trophic level.
10. Type of growth in a population facing limited resources.
13. Have a much larger effect on their environment than other organisms.
16. Make their own food (can do photosynthesis.
19. Role that an organism plays in their ecosystem.
20. Type of growth that occurs when a species has an abundance of resources.
21. This cycle is important for making DNA and RNA and does not cycle through the air.

2. Along with cellular respiration, this process drives the cycling of carbon in the environment.
3. The maximum number of individuals of a species that an environment can support.
5. An ecological relationship where both organisms benefit from living together.
6. This is what is represented by arrows in a food chain.
7. Diagram that shows many relationships in an ecosystem.
8. An ecological relationship where one organism benefits from while the other is unaffected.
11. Factors that prevent the growth of a population beyond a certain size.
12. Each step in an energy phyramid.
14. Can be caused by the removal of a keystone species from an ecosystem.
15. Can alter a habitat to the point some species may not survive.
17. Two species need the same limited resource.
18. Cannot make their own food. Must eat to survive.