1. Biomass Pyramids

Total amount of living tissue. Amount of potential food for each trophic level.

2. Pyramid of Numbers

Number of individuals at each level. Does not always resemble a pyramid.

3. Predation

One organism captures and feeds on another.

4. Competition

Organisms of the same or different species attempt to use the same resource at the same time.

5. Symbiosis

Any relationship in which 2 species live closely together. (Mutualism, Commensalism, ans=d Parasitism).

6. Mutualism

Win-win relationship. Both of them benefit.

7. Commensalism

Using without harm. One is helped and has little or no effect on the other.

8. Parasitism

Sponging off of others. One benefits and the other is harmed.

9. Carrying Capacity

The maximum number of individuals that a given habit can support.

10. Natural Capital

Range of tolerance for a population of organisms, such as fish, to an abiotic environment factor.