Vocabulary List 7

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Count every organism one at a time. This is the only exact way to find population size, but also the most difficult.

A group of organisms that are physically similar and can reproduce with each other to produce fertile offspring.

The variety or differences among living organisms within an ecosystem. The more diverse an ecosystem is the more stable it is.

The movement of individuals out (exit) of a population or ecosystem.

A group of animals is captured, marked, and released back into the ecosystem. Then on another day animals are captured and the number of those that have marks help determine population size.

The ratio of deaths to the number of organisms in a population over a given time period.

The maximum number of individuals of a population that a particular environment can support over a period of time.

The movement of individuals into a population or ecosystem.